Coworkers of the X-Ray department
Dr. Constantin Daniliuc
© C.G. Daniliuc Positions
- Head of the X-Ray department at the Organisch-Chemischen Institut der WWU Münster
- Rep. head of X-Ray spectrometry department at the Organisch-Chemischen Institut, WWU Münster
- Crystallographer at TU Braunschweig, Institut für Anorganische und Analytische Chemie, Prof. Dr. P. G. Jones: Prof. Dr. M. Tamm
- Scientific assistant at TU Braunschweig, Institut für Anorganische und Analytische Chemie
Education
- Ph.D. - Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Prof. Dr. W.-W. du Mont
- Master of Science - „Al. I. Cuza“ University of Iasi, Iasi (Romania) Faculty of Chemistry
- Study of Chemistry - Diploma at „Al. I. Cuza“ University of Iasi, Iasi (Romania) Faculty of Chemistry
Publications
Publications
- . Divergent access to fused N -heterocycle-thiazolines by solvent-dependent reaction of isoquinolinium thiolates with silylketene acetals. Chemical Communications (London). ; 59: 6032–6035. doi: 10.1039/D3CC00781B.
- . Integrating I(I)/I(III) catalysis in reaction cascade design enables the synthesis of gem-difluorinated tetralins from cyclobutanols. Nature Communications. ; 14(1). doi: 10.1038/s41467-023-38957-w.
- . Direct Light-Enabled Access to α-Boryl Radicals: Application in the Stereodivergent Synthesis of Allyl Boronic Esters**. Angewandte Chemie - International Edition. ; 62(34). doi: 10.1002/anie.202307540.
- . Catalytic Formal [2π+2σ] Cycloaddition of Aldehydes with Bicyclobutanes: Expedient Access to Polysubstituted 2-Oxabicyclo[2.1.1]hexanes. Angewandte Chemie - International Edition. ; 62(34). doi: 10.1002/anie.202305043.
- . Lewis Acid Catalyzed Formal (3+2)-Cycloaddition of Bicyclo[1.1.0]butanes with Ketenes. Angewandte Chemie - International Edition. ; 62(34). doi: 10.1002/anie.202304771.
- . The 2′-C-methylribonucleoside of 5-aza-7-deaza-7-iodoguanine: Hydrogen and halogen bonding in nucleoside crystals, synthesis and physical properties. Journal of Molecular Structure. ; 1286. doi: 10.1016/j.molstruc.2023.135535.
- . Ru-NHC-Catalyzed Asymmetric, Complete Hydrogenation of Indoles and Benzofurans: One Catalyst with Dual Function. Journal of the American Chemical Society. ; 145(29): 15695–15701. doi: 10.1021/jacs.3c04983.
- . Bora-alkenes: Metal Coordination and Reactions with BH-boranes. Chemistry - A European Journal. ; 29(41). doi: 10.1002/chem.202301044.
- . Dearomative ring expansion of thiophenes by bicyclobutane insertion. Science. ; 381(6653): 75–81. doi: 10.1126/science.adh9737.
- . Geometric Isomerisation of Bifunctional Alkenyl Fluoride Linchpins: Stereodivergence in Amide and Polyene Bioisostere Synthesis. Angewandte Chemie - International Edition. ; 62(27). doi: 10.1002/anie.202304150.
- . Regiodivergent C−H Acylation of Arenes by Switching from Ionic- to Radical-Type Chemistry Using NHC Catalysis. Angewandte Chemie - International Edition. ; 62(27). doi: 10.1002/anie.202303222.
- . Ortho-Selective Dearomative [2π+ 2σ] Photocycloadditions of Bicyclic Aza-Arenes. Journal of the American Chemical Society. ; 145(22): 12324–12332. doi: 10.1021/jacs.3c02961.
- . Intramolecular Radical Oxygen-Transfer Reactions Using Nitroarenes. ACS Catalysis. ; 13(10): 6704–6709. doi: 10.1021/acscatal.3c00958.
- . Regioselectivity Control in Spirobifluorene Nitration under Mild Conditions: Explaining the Crivello’s Reagent Mechanism. Journal of Organic Chemistry. ; 88(9): 5285–5290. doi: 10.1021/acs.joc.2c02596.
- . Alkyl Radical Generation from Alkylboronic Pinacol Esters through Substitution with Aminyl Radicals. Journal of the American Chemical Society. ; 145(16): 8770–8775. doi: 10.1021/jacs.3c01129.
- . Microwave-Assisted Synthesis, Structure, and Preliminary Biological Evaluation of Novel 6-Methoxy-5,6-dihydro-5-azapurines. ACS Omega. ; 8(15): 14097–14112. doi: 10.1021/acsomega.3c00765.
- . Biosynthesis of the Isocoumarin Derivatives Fusamarins is Mediated by the PKS8 Gene Cluster in Fusarium. ChemBioChem. ; 24(6). doi: 10.1002/cbic.202200342.
- . An Interesting Conversion Route of Mononuclear Zinc Complex to Zinc Mixed Carboxylate Coordination Polymer. Molecules. ; 28(5). doi: 10.3390/molecules28052011.
- . Fluorocyclisation of Oximes to Isoxazolines Through I(I)/I(III) Catalysis. Helvetica Chimica Acta. ; 106(3). doi: 10.1002/hlca.202200183.
- . Metal-free photosensitized radical relay 1,4-carboimination across two distinct olefins. Chemical science. ; 14(9): 2447–2454. doi: 10.1039/d2sc06497a.
- . EnT-Mediated N-S Bond Homolysis of a Bifunctional Reagent Leading to Aliphatic Sulfonyl Fluorides. Journal of the American Chemical Society. ; 145(4): 2364–2374. doi: 10.1021/jacs.2c11295.
- . Boraalkenes Made by a Hydroboration Route: Cycloaddition and B=C Bond Cleavage Reactions. Angewandte Chemie - International Edition. ; 62(4). doi: 10.1002/anie.202214700.
- . Synthesis and Functional Characterization of Novel RU1968-Derived CatSper Inhibitors with Reduced Stereochemical Complexity. ACS Pharmacology and Translational Science. ; 6(1): 115–127. doi: 10.1021/acsptsci.2c00188.
- . Catalytic, Regioselective 1,4-Fluorodifunctionalization of Dienes. Angewandte Chemie - International Edition. ; 62(1). doi: 10.1002/anie.202214906.
- . Aminoacylation of alkenes by cooperative nhc and photoredox catalysis. SYNLETT. ; 2023. doi: 10.1055/a-2145-8697.
- . Forging Medium Rings via I(I)/I(III)-Catalyzed Diene Carbofunctionalization. Angewandte Chemie - International Edition. ; 62(35). doi: 10.1002/anie.202309789.
- . Dispersion Energy-Stabilized Boron and Phosphorus Lewis Pairs. Angewandte Chemie - International Edition. ; 62(35). doi: 10.1002/anie.202308752.
- . Enantioselective Copper-Catalyzed Fukuyama Indole Synthesis from 2-Vinylphenyl Isocyanides. Journal of the American Chemical Society. ; 145: 8665–8676. doi: 10.1021/jacs.3c01667.
- . Tuning the Emission Behaviour of Halogenated Bridged Ethers in Solution, as Solids and as Aggregates by Chalcogen Substitution. ChemPhotoChem. ; 7(1). doi: 10.1002/cptc.202200169.
- . CCDC 1026396: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc13g1k5.
- . CCDC 1981864: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc24j933.
- . CCDC 2000136: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2549j5.
- . CCDC 2073466: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc27lm0h.
- . CCDC 2073467: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc27lm1j.
- . CCDC 2073468: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc27lm2k.
- . CCDC 2073469: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc27lm3l.
- . CCDC 2073470: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc27lm4m.
- . CCDC 2084762: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc27zcd0.
- . CCDC 2152160: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2b7hjm.
- . CCDC 2152161: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2b7hkn.
- . CCDC 2152162: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2b7hlp.
- . CCDC 2152163: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2b7hmq.
- . CCDC 2155666: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4mh.
- . CCDC 2155667: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4nj.
- . CCDC 2155668: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4pk.
- . CCDC 2155669: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4ql.
- . CCDC 2155670: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4rm.
- . CCDC 2155671: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4sn.
- . CCDC 2155672: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4tp.
- . CCDC 2155673: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4vq.
- . CCDC 2155674: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4wr.
- . CCDC 2155675: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4xs.
- . CCDC 2155676: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4yt.
- . CCDC 2155677: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc4zv.
- . CCDC 2155678: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc50x.
- . CCDC 2155679: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc51y.
- . CCDC 2155710: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc61z.
- . CCDC 2155711: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc620.
- . CCDC 2155712: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bc631.
- . CCDC 2157210: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bdrfy.
- . CCDC 2157211: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bdrgz.
- . CCDC 2157212: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bdrh0.
- . CCDC 2164566: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bndq4.
- . CCDC 2164595: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bnfn3.
- . CCDC 2164760: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bnlzl.
- . CCDC 2164859: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bnq5x.
- . CCDC 2164860: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bnq6y.
- . CCDC 2165993: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bpwrp.
- . CCDC 2169058: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bt2mw.
- . CCDC 2169059: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2bt2nx.
- . CCDC 2181677: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2c76pj.
- . CCDC 2182191: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2c7r8n.
- . CCDC 2182192: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2c7r9p.
- . CCDC 2182193: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2c7rbq.
- . CCDC 2243986: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2fb1nh.
- Borole/Borapyramidane Relationship. Journal of the American Chemical Society. ; 144: 7815–7821. doi: 10.1021/jacs.2c01727.
- . Formation of a Hybrid 1‐Bora‐3‐boratabenzene Heteroarene Anion Derivative. Angewandte Chemie - International Edition. ; 61(31): e202205565. doi: 10.1002/anie.202205565.
- . Azodioxy compounds as precursors for C-radicals and their application in thermal styrene difunctionalization. Chemical science. ; 13: 9749–9754. doi: 10.1039/D2SC03860A.
- . Benzotriazolium Salts: Emergent Readily Accessible Bench-Stable Lewis Acid Catalysts. Organic letters. ; 24: 6105–6110. doi: 10.1021/acs.orglett.2c01697.
- . Amide-functionalized 1,2,4-Triazol-5-amines as Covalent Inhibitors of Blood Coagulation Factor XIIa and Thrombin. ACS Pharmacology and Translational Science. ; 5(12): 1318–1347. doi: 10.1021/acsptsci.2c00204.
- . Direct Access to Unnatural Cyclobutane α-Amino Acids through Visible Light Catalyzed [2+2]-Cycloaddition. ACS organic & inorganic Au.. ; 2(6): 496–501. doi: 10.1021/acsorginorgau.2c00026.
- . Chromium/Photoredox Dual Catalyzed Synthesis of α-Benzylic Alcohols, Isochromanones, 1,2-Oxy Alcohols and 1,2-Thio Alcohols. Angewandte Chemie - International Edition. ; 61(49). doi: 10.1002/anie.202212136.
- . Skeletal Ring Contractions via I(I)/I(III) Catalysis: Stereoselective Synthesis of cis-α,α-Difluorocyclopropanes. ACS Catalysis. ; 12(23): 14507–14516. doi: 10.1021/acscatal.2c04511.
- . Energy transfer-enabled unsymmetrical diamination using bifunctional nitrogen-radical precursors. Nature Catalysis. ; 5(12): 1120–1130. doi: 10.1038/s41929-022-00883-3.
- . Exploring dithiolate-amine binary ligand systems for the supramolecular assemblies of Ni(II) coordination compounds: Crystal structures, theoretical studies, cytotoxicity studies, and molecular docking studies. Inorganica Chimica Acta. ; 543. doi: 10.1016/j.ica.2022.121157.
- . Highly Selective Radical Relay 1,4-Oxyimination of Two Electronically Differentiated Olefins. Journal of the American Chemical Society. ; 144(47): 21664–21673. doi: 10.1021/jacs.2c09244.
- . Synthesis of Polysubstituted 2-Oxabicyclo[2.1.1]hexanes via Visible-Light-Induced Energy Transfer. Journal of the American Chemical Society. ; 144(44): 20207–20213. doi: 10.1021/jacs.2c09248.
- . Cyclopropene activation via I(I)/I(III) catalysis: Proof of principle and application in direct tetrafluorination. Tetrahedron. ; 126. doi: 10.1016/j.tet.2022.132925.
- . Pyrazole-Based Thrombin Inhibitors with a Serine-Trapping Mechanism of Action: Synthesis and Biological Activity. Pharmaceuticals. ; 15(11). doi: 10.3390/ph15111340.
- . Phenol-benzoxazolone bioisosteres of GluN2B-NMDA receptor antagonists: Unexpected rearrangement during reductive alkylation with phenylcyclohexanone. Archiv der Pharmazie / Chemistry in Life Sciences. ; 355(11). doi: 10.1002/ardp.202200225.
- . Oxy-Borylenes as Photoreductants: Synthesis and Application in Dehalogenation and Detosylation Reactions. Angewandte Chemie - International Edition. ; 61(42). doi: 10.1002/anie.202209391.
- . Synthesis of Five-Membered Ring Systems Bearing gem-Difluoroalkenyl and Monofluoroalkenyl Substituents via Radical β-Bromo Fragmentation. ACS Catalysis. ; 12(19): 11934–11941. doi: 10.1021/acscatal.2c03775.
- . Photochemical single-step synthesis of β-amino acid derivatives from alkenes and (hetero)arenes. Nature Chemistry. ; 14(10): 1174–1184. doi: 10.1038/s41557-022-01008-w.
- . Organophotocatalytic N-O Bond Cleavage of Weinreb Amides: Mechanism-Guided Evolution of a PET to ConPET Platform. ACS Catalysis. ; 12(16): 10047–10056. doi: 10.1021/acscatal.2c02991.
- . Generation of boryl-nitroxide radicals from a boraalkene via the nitroso ene reaction. Chemical science. ; 13(36): 10891–10896. doi: 10.1039/d2sc02485c.
- . Direct Formation and Reactivity of a Bromo- and Amido-Substituted Cyclotrisilene. Organometallics. ; 41(15): 2146–2153. doi: 10.1021/acs.organomet.2c00245.
- . Access to Unexplored 3D Chemical Space: cis-Selective Arene Hydrogenation for the Synthesis of Saturated Cyclic Boronic Acids. Angewandte Chemie - International Edition. ; 61(32). doi: 10.1002/anie.202206687.
- . Regio- and Enantioselective Intermolecular Aminofluorination of Alkenes via Iodine(I)/Iodine(III) Catalysis**. Angewandte Chemie - International Edition. ; 61(32). doi: 10.1002/anie.202205508.
- . Structural and Antimicrobial Characterization of Co-Crystal [Ni(bpy)(acr)2(H2O)]·MA. Crystals. ; 12(8). doi: 10.3390/cryst12081078.
- . Formation of a Hybrid 1-Bora-3-boratabenzene Heteroarene Anion Derivative. Angewandte Chemie - International Edition. ; 61(31). doi: 10.1002/anie.202205565.
- . Oxidative N-Heterocyclic Carbene-Catalyzed Intramolecular Friedel-Crafts Alkylation of Indoles for the Synthesis of Spirocyclic Indolenines. Organic letters. ; 24(29): 5314–5318. doi: 10.1021/acs.orglett.2c01927.
- . Stereocontrolled Synthesis of Fluorinated Isochromans via Iodine(I)/Iodine(III) Catalysis. Angewandte Chemie - International Edition. ; 61(30). doi: 10.1002/anie.202205277.
- . Dearomatizing Cyclization of 2-Iodoindoles by Oxidative NHC Catalysis to Access Spirocyclic Indolenines and Oxindoles Bearing an All Carbon Quaternary Stereocenter. Organic letters. ; 24(27): 4960–4964. doi: 10.1021/acs.orglett.2c01851.
- . Synthesis and biological evaluation of conformationally restricted GluN2B ligands derived from eliprodil. European Journal of Medicinal Chemistry. ; 237. doi: 10.1016/j.ejmech.2022.114359.
- . Towards Optimized Bioavailability of 99mTc-Labeled Barbiturates for Non-invasive Imaging of Matrix Metalloproteinase Activity. Molecular Imaging and Biology. ; 24(3): 434–443. doi: 10.1007/s11307-021-01668-z.
- . Intermolecular [2π+2σ]-photocycloaddition enabled by triplet energy transfer. Nature. ; 605(7910): 477–482. doi: 10.1038/s41586-022-04636-x.
- . Dynamic kinetic resolution of transient hemiketals: a strategy for the desymmetrisation of prochiral oxetanols. Chemical science. ; 13(21). doi: 10.1039/d2sc01547a.
- . Facile access to fused 2D/3D rings via intermolecular cascade dearomative [2 + 2] cycloaddition/rearrangement reactions of quinolines with alkenes. Nature Catalysis. ; 5(5): 405–413. doi: 10.1038/s41929-022-00784-5.
- . Synthesis and physical chemical properties of CF3O-containg secondary amines—Perspective building blocks for drug discovery. Journal of Fluorine Chemistry. ; 257-258. doi: 10.1016/j.jfluchem.2022.109990.
- . Aroyl Fluorides as Bifunctional Reagents for Dearomatizing Fluoroaroylation of Benzofurans. Journal of the American Chemical Society. ; 144(16): 7072–7079. doi: 10.1021/jacs.2c01735.
- . A deprotonation pathway to reactive [B] = CH2 boraalkenes. Dalton Transactions. ; 51(19): 7695–7704. doi: 10.1039/d2dt01193j.
- . Stereochemical Behavior of Pairs of P-stereogenic Phosphanyl Groups at the Dimethylxanthene Backbone. Chemistry - A European Journal. ; 28(20). doi: 10.1002/chem.202200248.
- . Development of Bicyclo[3.1.0]hexane-Based A3 Receptor Ligands: Closing the Gaps in the Structure–Affinity Relationships. Molecules. ; 27(7). doi: 10.3390/molecules27072283.
- . Reversible Self-Assembly of an N-Heterocyclic Carbene on Metal Surfaces. Angewandte Chemie - International Edition. ; 61(13). doi: 10.1002/anie.202115104.
- . Radical 1-Fluorosulfonyl-2-alkynylation of Unactivated Alkenes. Angewandte Chemie - International Edition. ; 61(12). doi: 10.1002/anie.202115593.
- . 8-Furylimidazolo-2'-deoxycytidine: Crystal structure, packing, atropisomerism and fluorescence. Acta crystallographica. Section C: Structural chemistry. ; 78: 141–147. doi: 10.1107/S2053229622001000.
- . Synthesis of tropane-based σ1 receptor antagonists with antiallodynic activity. European Journal of Medicinal Chemistry. ; 230. doi: 10.1016/j.ejmech.2022.114113.
- . An olefin-based multi-component reaction to yield 1,2-azaborolidine derivatives. Dalton Transactions. ; 51(5): 1775–1778. doi: 10.1039/d1dt04337d.
- . One-step synthesis of indolizino[3,4,5-ab] isoindoles by manganese(i)-catalyzed C-H activation: Structural studies and photophysical properties. Organic and Biomolecular Chemistry. ; 20(4): 796–800. doi: 10.1039/d1ob02246f.
- . Mapping the Regioisomeric Space and Visible Color Range of Purely Organic Dual Emitters with Ultralong Phosphorescence Components: From Violet to Red Towards Pure White Light. Angewandte Chemie - International Edition. ; 61(4). doi: 10.1002/anie.202111805.
- . 2,3-Difunctionalized Indoles via Radical Acylation or Trifluoromethylation of ortho-Alkynylphenyl Isonitriles. Organic letters. ; 24(1): 284–288. doi: 10.1021/acs.orglett.1c03916.
- . Tris(tetramethylguanidinyl)phosphine: The Simplest Non-ionic Phosphorus Superbase and Strongly Donating Phosphine Ligand. Chemistry - A European Journal. ; 28(3). doi: 10.1002/chem.202104021.
- . Substituent Dependent Cyclization Reactions of 1,1'-Bis(alkynyl)ferrocenes with the (C6F5)BH2 ⋅ SMe2 Hydroboration Reagent. European Journal of Inorganic Chemistry. ; 2022(1). doi: 10.1002/ejic.202100838.
- . Leveraging the n→π* Interaction in Alkene Isomerization by Selective Energy Transfer Catalysis. Angewandte Chemie - International Edition. ; 61(2). doi: 10.1002/anie.202113600.
- . Impact of β-perfluoroalkyl substitution of proline on the proteolytic stability of its peptide derivatives. Organic and Biomolecular Chemistry. ; 20(47). doi: 10.1039/d2ob01430k.
- . Cadmium(II) coordination polymer based on flexible dithiolate-polyamine binary ligands system: Crystal structure, Hirshfeld surface analysis, antimicrobial, and DNA cleavage potential. Polyhedron. ; 211. doi: 10.1016/j.poly.2021.115544.
- . CCDC 120954: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc41vrr.
- . CCDC 1944014: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc237x4f.
- . CCDC 196049: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc6l05y.
- . CCDC 1985484: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24n1wr.
- . CCDC 2068163: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27f2yq.
- . CCDC 2068164: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc27f2zr.
- . CCDC 2069759: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27grfx.
- . CCDC 2069760: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27grgy.
- . CCDC 2069761: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27grhz.
- . CCDC 2069762: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27grj0.
- . CCDC 2069763: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27grk1.
- . CCDC 2077767: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27r2rv.
- . CCDC 2077768: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27r2sw.
- . CCDC 2077769: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27r2tx.
- . CCDC 2077770: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27r2vy.
- . CCDC 2077771: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27r2wz.
- . CCDC 2077772: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27r2x0.
- . CCDC 2077773: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27r2y1.
- . CCDC 2077774: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27r2z2.
- . CCDC 2077775: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc27r304.
- . CCDC 2087003: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc281ppq.
- . CCDC 2087004: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc281pqr.
- . CCDC 2087005: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc281prs.
- . CCDC 2087006: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc281pst.
- . CCDC 2087007: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc281ptv.
- . CCDC 2087008: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc281pvw.
- . CCDC 2087009: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc281pwx.
- . CCDC 2087010: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc281pxy.
- . CCDC 2087011: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc281pyz.
- . CCDC 2088365: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2833m4.
- . CCDC 2088366: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc2833n5.
- . CCDC 2088367: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2833p6.
- . CCDC 2088368: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2833q7.
- . CCDC 2088369: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2833r8.
- . CCDC 2157452: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bf071.
- . CCDC 2157453: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bf082.
- . CCDC 2157861: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bfffn.
- . CCDC 2157862: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bffgp.
- . CCDC 2157863: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bffhq.
- . CCDC 2157864: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bffjr.
- . CCDC 2157865: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bffks.
- . CCDC 2157866: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bfflt.
- . CCDC 2165452: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bpb9p.
- . CCDC 2165453: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bpbbq.
- . CCDC 2165454: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bpbcr.
- . CCDC 2166880: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtc8.
- . CCDC 2166881: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtd9.
- . CCDC 2166883: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtgc.
- . CCDC 2166884: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqthd.
- . CCDC 2166885: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtjf.
- . CCDC 2166886: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtkg.
- . CCDC 2166887: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtlh.
- . CCDC 2166888: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtmj.
- . CCDC 2166889: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtnk.
- . CCDC 2166890: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtpl.
- . CCDC 2166891: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtqm.
- . CCDC 2166892: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtrn.
- . CCDC 2166893: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtsp.
- . CCDC 2166894: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqttq.
- . CCDC 2166895: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtvr.
- . CCDC 2166896: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2bqtws.
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- . CCDC 1980895: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24h8vs.
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- . CCDC 1968723: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc242m62.
- . CCDC 1968724: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc242m73.
- . CCDC 1969335: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2437yg.
- . CCDC 1969336: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2437zh.
- . CCDC 1969337: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24380k.
- . CCDC 1969648: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243l1x.
- . CCDC 1969649: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243l2y.
- . CCDC 1969650: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243l3z.
- . CCDC 1969651: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243l40.
- . CCDC 1969652: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243l51.
- . CCDC 1969653: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243l62.
- . CCDC 1969654: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243l73.
- . CCDC 1969655: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243l84.
- . CCDC 1969656: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243l95.
- . CCDC 1969657: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243lb6.
- . CCDC 1969658: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243lc7.
- . CCDC 1969659: Experimental Crystal Structure Determination ... ; . doi: 10.5517/ccdc.csd.cc243ld8.
- . CCDC 1969660: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc243lf9.
- . CCDC 1969661: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc243lgb.
- . CCDC 1969662: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc243lhc.
- . CCDC 1969663: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc243ljd.
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- . CCDC 1977169: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cdnl.
- . CCDC 1977170: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cdpm.
- . CCDC 1977171: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cdqn.
- . CCDC 1977172: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cdrp.
- . CCDC 1977173: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cdsq.
- . CCDC 1977175: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cdvs.
- . CCDC 1977176: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cdwt.
- . CCDC 1977177: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cdxv.
- . CCDC 1977178: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cdyw.
- . CCDC 1977179: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cdzx.
- . CCDC 1977180: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24cf0z.
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- . CCDC 1978468: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24drkw.
- . CCDC 1978469: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24drlx.
- . CCDC 1978470: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24drmy.
- . CCDC 1981863: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24j922.
- . CCDC 1985880: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24ngny.
- . CCDC 1985881: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24ngpz.
- . CCDC 1985882: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24ngq0.
- . CCDC 1985883: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24ngr1.
- . CCDC 1990167: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24sxyt.
- . CCDC 1990168: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24sxzv.
- . CCDC 1990169: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24sy0x.
- . CCDC 1990170: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24sy1y.
- . CCDC 1990171: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24sy2z.
- . CCDC 1990304: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24t2cf.
- . CCDC 1990305: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24t2dg.
- . CCDC 1990306: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24t2fh.
- . CCDC 1992509: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24wchx.
- . CCDC 1992510: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24wcjy.
- . CCDC 1992511: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24wckz.
- . CCDC 1992512: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24wcl0.
- . CCDC 1995218: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24z5w6.
- . CCDC 1995219: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24z5x7.
- . CCDC 1995220: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24z5y8.
- . CCDC 1995718: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24zq0w.
- . CCDC 1995719: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24zq1x.
- . CCDC 1995720: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24zq2y.
- . CCDC 1995721: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24zq3z.
- . CCDC 1995781: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc24zs1z.
- . CCDC 1996899: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc250y38.
- . CCDC 1996900: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc250y49.
- . CCDC 1996901: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc250y5b.
- . CCDC 1996902: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc250y6c.
- . CCDC 1996903: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc250y7d.
- . CCDC 1996904: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc250y8f.
- . CCDC 1996905: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc250y9g.
- . CCDC 1996906: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc250ybh.
- . CCDC 1996966: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc25108j.
- . CCDC 1997967: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2521kw.
- . CCDC 1999050: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2535hz.
- . CCDC 1999051: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2535j0.
- . CCDC 1999052: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2535k1.
- . CCDC 1999053: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2535l2.
- . CCDC 1999054: Experimental Crystal Structure Determination. ; . doi: 10.5517/ccdc.csd.cc2535m3.
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Nicole Brameier
© Nicole Brameier Alumni
© C.G. Daniliuc Oezguen, Thomas; Ye, Ke-Yin; Daniliuc, Constantin G.; Wibbeling, Birgit; Liu, Lei; Grimme, Stefan; Kehr, Gerald; Erker, Gerhard: Why Does the Intramolecular Trimethylene-Bridged Frustrated Lewis Pair Mes2PCH2CH2CH2B(C6F5)2 Not Activate Dihydrogen?: Chemistry - A European Journal (2016), 22(17), 5988-5995.
Wrobel, Agnes Johanna; Lucchesi, Ralph; Wibbeling, Birgit; Daniliuc, Constantin-Gabriel; Froehlich, Roland; Wuerthwein, Ernst-Ulrich: 1,3,5-Triazapentadienes by Nucleophilic Addition to 1,3- and 1,4-Dinitriles-Sterically Constrained Examples by Incorporation into Cyclic Peripheries: Synthesis, Aggregation, and Photophysical Properties: Journal of Organic Chemistry (2016), 81(7), 2849-2863.
Ernst, Johannes B.; Ruehling, Andreas; Wibbeling, Birgit; Glorius, Frank: Trichloromethylthiolation of N-Heterocycles: Practical and Completely Regioselective: Chemistry - A European Journal (2016), 22(13), 4400-4404.
Normand, Adrien T.; Daniliuc, Constantin G.; Wibbeling, Birgit; Kehr, Gerald; Le Gendre, Pierre; Erker, Gerhard: Insertion Reactions of Neutral Phosphidozirconocene Complexes as a Convenient Entry into Frustrated Lewis Pair Territory: Chemistry - A European Journal (2016), 22(12), 4285-4293.
Rosorius, Christoph; Moericke, Jennifer; Wibbeling, Birgit; McQuilken, Alison C.; Warren, Timothy H.; Daniliuc, Constantin G.; Kehr, Gerald; Erker, Gerhard: Frustrated Lewis Pair Chemistry Derived from Bulky Allenyl and Propargyl Phosphanes: Chemistry - A European Journal (2016), 22(3), 1103-1113.
Normand, Adrien T.; Daniliuc, Constantin G.; Wibbeling, Birgit; Kehr, Gerald; Le Gendre, Pierre; Erker, Gerhard: Phosphido- and Amidozirconocene Cation-Based Frustrated Lewis Pair Chemistry: Journal of the American Chemical Society (2015), 137(33), 10796-10808.
Chen, Guo-Qiang; Kehr, Gerald; Daniliuc, Constantin G.; Wibbeling, Birgit; Erker, Gerhard: Bifunctional Behavior of Unsaturated Intramolecular Phosphane-Borane Frustrated Lewis Pairs Derived from Uncatalyzed 1,4-Hydrophosphination of a Dienylborane: Chemistry - A European Journal (2015), 21(35), 12449-12455.
Matuschek, David; Eusterwiemann, Steffen; Stegemann, Linda; Doerenkamp, Carsten; Wibbeling, Birgit; Daniliuc, Constantin G.; Doltsinis, Nikos L.; Strassert, Cristian A.; Eckert, Hellmut; Studer, Armido: Profluorescent verdazyl radicals - synthesis and characterization: Chemical Science (2015), 6(8), 4712-4716.
Jin, Xing; Willeke, Matthias; Lucchesi, Ralph; Daniliuc, Constantin-Gabriel; Froehlich, Roland; Wibbeling, Birgit; Uhl, Werner; Wuerthwein, Ernst-Ulrich: Hydroalumination of Ketenimines and Subsequent Reactions with Heterocumulenes: Synthesis of Unsaturated Amide Derivatives and 1,3-Diimines: Journal of Organic Chemistry (2015), 80(12), 6062-6075.
Froemel, Silke; Radermacher, Georg; Wibbeling, Birgit; Daniliuc, Constantin G.; Warren, Timothy H.; Kehr, Gerald; Erker, Gerhard: P/B Ketene Adduct Formation from Acyl Chlorides at a Vicinal Phosphane/Borane Frustrated Lewis Pair: Israel Journal of Chemistry (2015), 55(2), 210-215.
Feldhaus, Philipp; Wibbeling, Birgit; Froehlich, Roland; Daniliuc, Constantin G.; Kehr, Gerald; Erker, Gerhard: Formation of allenes by 1,4-addition of intermolecular phosphine/borane frustrated Lewis pairs to a conjugated enyne: Synlett (2014), 25(11), 1529-1533, 5 pp..
Bender, Georg; Daniliuc, Constantin G.; Wibbeling, Birgit; Kehr, Gerald; Erker, Gerhard: Reaction of five-membered zirconacycloallenoids with the strong Lewis acid B(C6F5)3: Dalton Transactions (2014), 43(32), 12210-12213.
Chakrabarty, Shyamal; Chatterjee, Indranil; Wibbeling, Birgit; Daniliuc, Constantin Gabriel; Studer, Armido: Stereospecific formal [3+2] dipolar cycloaddition of cyclopropanes with nitrosoarenes: An approach to isoxazolidines: Angewandte Chemie, International Edition (2014), 53(23), 5964-5968.
Eller, Christina; Bussmann, Kathrin; Kehr, Gerald; Wibbeling, Birgit; Daniliuc, Constantin G.; Erker, Gerhard: Ethene/alkyne exchange reaction at an intramolecular frustrated Lewis pair: Chemical Communications (Cambridge, United Kingdom) (2014), 50(16), 1980-1982.
He, Zhiheng; Wibbeling, Birgit; Studer, Armido: Oxidative Heck Coupling of Allylic Amines with 2,2,6,6-Tetramethylpiperidine-N-oxyl (TEMPO) as Oxidant for the Preparation of Tetrasubstituted Alkenes: Advanced Synthesis & Catalysis (2013), 355(18), 3639-3647.
Neue, Benedikt; Wakamiya, Atsushi; Froehlich, Roland; Wibbeling, Birgit; Yamaguchi, Shigehiro; Wuerthwein, Ernst-Ulrich: Modification and Unexpected Reactivity of 2-Borylbenzaldimines: Acylated and Silylated Derivatives as Well as Dimeric Compounds: Journal of Organic Chemistry (2013), 78(23), 11747-11755.
Ekkert, Olga; Kehr, Gerald; Daniliuc, Constantin G.; Froehlich, Roland; Wibbeling, Birgit; Petersen, Jeffrey L.; Erker, Gerhard: Reaction of Unsaturated Vicinal Phosphane/Borane Frustrated Lewis Pairs with Benzaldehyde: Zeitschrift fuer Anorganische und Allgemeine Chemie (2013), 639(14), 2455-2462.
Bender, Georg; Kehr, Gerald; Daniliuc, Constantin G.; Wibbeling, Birgit; Erker, Gerhard: Formation and structural characterization of a five-membered zirconacycloallenoid: Dalton Transactions (2013), 42(41), 14673-14676.
Hengesbach, Frank; Jin, Xing; Hepp, Alexander; Wibbeling, Birgit; Wuerthwein, Ernst-Ulrich; Uhl, Werner: Activation of Isocyanates and Carbon Dioxide by a Monomeric Aluminium Hydrazide as an Active Lewis Pair: Chemistry - A European Journal (2013), 19(41), 13901-13909.
Schinor, Benjamin; Wibbeling, Birgit; Haufe, Guenter: Synthesis and pKa values of 2-(3- and 4-pentafluorosulfanylphenyl)-2-fluorocyclopropylamines: Journal of Fluorine Chemistry (2013), 155, 102-109.
Neue, Benedikt; Reiermann, Ralph; Froehlich, Roland; Wibbeling, Birgit; Bergander, Klaus; Wuerthwein, Ernst-Ulrich: Isocyanide Cyclization Reactions: 4-Methylene-4H-benzo[d][1,3]oxazine, 3-Benzyl-4-methylene-3,4-dihydroquinazolines and 3-(4-Benzyl)-3H-quinazolin-4-ones - Experiment and Theory: European Journal of Organic Chemistry (2013), 2013(22), 4944-4952.
Hellmann, Johannes; Rhotert, Ines; Westenberg, Hauke; Froehlich, Roland; Wibbeling, Birgit; Uhl, Werner; Wuerthwein, Ernst-Ulrich: N-Acyl- and N-Sulfonylformamidines from Cyanamides and Carbodiimides by Hydroalumination and Subsequent Treatment with Electrophiles: European Journal of Organic Chemistry (2013), 2013(16), 3356-3368.
Voskuhl, Jens; Kauscher, Ulrike; Gruener, Malte; Frisch, Hendrik; Wibbeling, Birgit; Strassert, Cristian A.; Ravoo, Bart Jan: A soft supramolecular carrier with enhanced singlet oxygen photosensitizing properties: Soft Matter (2013), 9(8), 2453-2457.
Liedtke, Rene; Kehr, Gerald; Froehlich, Roland; Daniliuc, Constantin G.; Wibbeling, Birgit; Petersen, Jeffrey L.; Erker, Gerhard: Carboboration Reactions of 1,2-Bis[(diarylphosphino)ethynyl]benzenes with Tris(pentafluorophenyl)borane: Helvetica Chimica Acta (2012), 95(12), 2515-2527.
Persich, Peter; Kerschbaumer, Julia; Helling, Sandra; Hildmann, Barbara; Wibbeling, Birgit; Haufe, Guenter: Transannular O-Heterocyclization: A Useful Tool for the Total Synthesis of Murisolin and 16,19-cis-Murisolin: Organic Letters (2012), 14(22), 5628-5631.
Xu, Bao-Hua; Kehr, Gerald; Froehlich, Roland; Wibbeling, Birgit; Schirmer, Birgitta; Grimme, Stefan; Erker, Gerhard: Reaction of Frustrated Lewis Pairs with Conjugated Ynones-Selective Hydrogenation of the Carbon-Carbon Triple Bond [Erratum to document cited in CA155:300982]: Angewandte Chemie, International Edition (2012), 51(41), 10213.
Feldhaus, Philipp; Schirmer, Birgitta; Wibbeling, Birgit; Daniliuc, Constantin G.; Froehlich, Roland; Grimme, Stefan; Kehr, Gerald; Erker, Gerhard: Frustrated Lewis pair addition to conjugated diynes: Formation of zwitterionic 1,2,3-butatriene derivatives: Dalton Transactions (2012), 41(30), 9135-9142.
Voskuhl, Jens; Waller, Mark; Bandaru, Sateesh; Tkachenko, Boryslav A.; Fregonese, Carlo; Wibbeling, Birgit; Schreiner, Peter R.; Ravoo, Bart Jan: Nanodiamonds in sugar rings: an experimental and theoretical investigation of cyclodextrin-nanodiamond inclusion complexes: Organic & Biomolecular Chemistry (2012), 10(23), 4524-4530.
Holtrichter-Roessmann, Thorsten; Roesener, Christian; Hellmann, Johannes; Uhl, Werner; Wuerthwein, Ernst-Ulrich; Froehlich, Roland; Wibbeling, Birgit: Generation of weakly bound Al-N Lewis pairs by hydroalumination of ynamines and the activation of small molecules: phenylethyne and dicyclohexylcarbodiimide: Organometallics (2012), 31(8), 3272-3283.
Neue, Benedikt; Froehlich, Roland; Wibbeling, Birgit; Fukazawa, Aiko; Wakamiya, Atsushi; Yamaguchi, Shigehiro; Wuerthwein, Ernst-Ulrich: Synthesis and Photophysical Properties of Aryl-Substituted 2-Borylbenzaldimines and Their Extended ?-Conjugated Congeners: Journal of Organic Chemistry (2012), 77(5), 2176-2184.
Mueller, Christian H.; Wilking, Michael; Ruehlmann, Ansgar; Wibbeling, Birgit; Hennecke, Ulrich: Catalytic, asymmetric, bromine-induced semipinacol rearrangements at unactivated double bonds: Synlett (2011), (14), 2043-2047.
Neue, Benedikt; Reiermann, Ralph; Gerdes, Klaus; Froehlich, Roland; Wibbeling, Birgit; Wuerthwein, Ernst-Ulrich: Ring Closure Reactions of 2,6-Diazaheptatrienyl Metal Compounds: Synthesis of 3-Aminoindole Derivatives and 14-Membered Macrocyclic Dimers: Journal of Organic Chemistry (2011), 76(21), 8794-8806.
Xu, Bao-Hua; Kehr, Gerald; Froehlich, Roland; Wibbeling, Birgit; Schirmer, Birgitta; Grimme, Stefan; Erker, Gerhard: Reaction of Frustrated Lewis Pairs with Conjugated Ynones-Selective Hydrogenation of the Carbon-Carbon Triple Bond: Angewandte Chemie, International Edition (2011), 50(31), 7183-7186, S7183/1-S7183/25.
Ghavtadze, Nugzar; Narayan, Rishikesh; Wibbeling, Birgit; Wuerthwein, Ernst-Ulrich: 3-(Hetero)aryl-4-indolylamino-?-tetralones by Diastereoselective Internal Redox Cyclization: An "Azaenamine" Conjugate Addition: Journal of Organic Chemistry (2011), 76(13), 5185-5197.
Kleine, Tillmann; Froehlich, Roland; Wibbeling, Birgit; Wuerthwein, Ernst-Ulrich: Cyclization Reactions of 3,4-Diazaheptatrienyl Metal Compounds. Pyridines from an Anionic Analogue of the Fischer Indole Synthesis: Experiment and Theory: Journal of Organic Chemistry (2011), 76(11), 4591-4599.
Kleine, Tillmann; Bergander, Klaus; Froehlich, Roland; Wibbeling, Birgit; Wuerthwein, Ernst-Ulrich: Ring-Closure Reactions of 1,2-Diaza-4,5-benzoheptatrienyl Metal Compounds: Experiment and Theory: Journal of Organic Chemistry (2011), 76(7), 1979-1991.
Xu Bao-Hua; Kehr Gerald; Frohlich Roland; Wibbeling Birgit; Schirmer Birgitta; Grimme Stefan; Erker Gerhard: Reaction of frustrated Lewis pairs with conjugated ynones-selective hydrogenation of the carbon-carbon triple bond: Angewandte Chemie (International ed. in English) (2011), 50(31), 7183-6,
Chen, Chao; Eweiner, Florian; Wibbeling, Birgit; Froehlich, Roland; Senda, Shunsuke; Ohki, Yasuhiro; Tatsumi, Kazuyuki; Grimme, Stefan; Kehr, Gerald; Erker, Gerhard: Exploring the limits of frustrated Lewis pair chemistry with alkynes: Detection of a system that favors 1,1-carboboration over cooperative 1,2-P/B-addition: Chemistry - An Asian Journal (2010), 5(10), 2199-2208.
Unverhau, Kerstin; Luebbe, Gerrit; Wibbeling, Birgit; Froehlich, Roland; Kehr, Gerald; Erker, Gerhard: Frustrated Lewis Pair Reactions at the [3]Ferrocenophane Framework: Organometallics (2010), 29(21), 5320-5329.
Moemming, Cornelia M.; Kehr, Gerald; Wibbeling, Birgit; Froehlich, Roland; Erker, Gerhard: Addition reactions to the intramolecular mesityl2P-CH2-CH2-B(C6F5)2 frustrated Lewis pair: Dalton Transactions (2010), 39(32), 7556-7564.
Usener, Carolin; Kehr, Gerald; Froehlich, Roland; Wibbeling, Birgit; Mueck-Lichtenfeld, Christian; Erker, Gerhard: Developing a Reliable Synthetic Route to cis-1,3-Bridge-Disubstituted [3]Ferrocenophane Systems: Organometallics (2010), 29(17), 3852-3861.
Sunnam, Sunil Kumar; Schepmann, Dirk; Wibbeling, Birgit; Wuensch, Bernhard: Bicyclic ? receptor ligands by stereoselective Dieckmann analogous cyclization of piperazinebutyrate: Organic & Biomolecular Chemistry (2010), 8(16), 3715-3722.
Voskuhl, Jens; Fenske, Tassilo; Stuart, Marc C. A.; Wibbeling, Birgit; Schmuck, Carsten; Ravoo, Bart Jan: Molecular Recognition of Vesicles: Host-Guest Interactions Combined with Specific Dimerization of Zwitterions: Chemistry - A European Journal (2010), 16(28), 8300-8306, S8300/1-S8300/10.
Lamas, Marie-Celine; Vaillard, Santiago E.; Wibbeling, Birgit; Studer, Armido: Radical Amination with Trimethylstannylated Benzophenone Imine: Organic Letters (2010), 12(9), 2072-2075.
Moemming, Cornelia M.; Kehr, Gerald; Wibbeling, Birgit; Froehlich, Roland; Schirmer, Birgitta; Grimme, Stefan; Erker, Gerhard: Formation of Cyclic Allenes and Cumulenes by Cooperative Addition of Frustrated Lewis Pairs to Conjugated Enynes and Diynes: Angewandte Chemie, International Edition (2010), 49(13), 2414-2417, S2414/1-S2414/27.
Hemery, Therese; Wibbeling, Birgit; Froehlich, Roland; Hoppe, Dieter: Stereoselective synthesis of highly substituted annulated dihydropyrans based on ?-lithiation and homoaldol reaction of an enantiopure ?-silylated vinyl carbamate: Synthesis (2010), (2), 329-342.
Voskuhl Jens; Fenske Tassilo; Stuart Marc C A; Wibbeling Birgit; Schmuck Carsten; Ravoo Bart Jan: Molecular recognition of vesicles: host-guest interactions combined with specific dimerization of zwitterions: Chemistry (Weinheim an der Bergstrasse, Germany) (2010), 16(28), 8300-6,
Momming Cornelia M; Kehr Gerald; Wibbeling Birgit; Frohlich Roland; Schirmer Birgitta; Grimme Stefan; Erker Gerhard: Formation of cyclic allenes and cumulenes by cooperative addition of frustrated Lewis pairs to conjugated enynes and diynes: Angewandte Chemie (International ed. in English) (2010), 49(13), 2414-7,
Spies, Patrick; Kehr, Gerald; Bergander, Klaus; Wibbeling, Birgit; Froehlich, Roland; Erker, Gerhard: Metal-free dihydrogen activation chemistry: structural and dynamic features of intramolecular P/B pairs: Dalton Transactions (2009), (9), 1534-1541.
Lange, Heiko; Huenerbein, Robert; Wibbeling, Birgit; Froehlich, Roland; Grimme, Stefan; Hoppe, Dieter: Comprehensive experimental and theoretical studies of configurationally labile epimeric diamine complexes of ?-lithiated benzyl carbamates: Synthesis (2008), (18), 2905-2918.
Hruschka, Svenja; Rosen, Thomas C.; Yoshida, Shinichi; Kirk, Kenneth L.; Froehlich, Roland; Wibbeling, Birgit; Haufe, Guenter: Fluorinated phenylcyclopropylamines. Part 5: Effects of electron-withdrawing or -donating aryl substituents on the inhibition of monoamine oxidases A and B by 2-aryl-2-fluoro-cyclopropylamines: Bioorganic & Medicinal Chemistry (2008), 16(15), 7148-7166.
Otte, Ralf; Wibbeling, Birgit; Froehlich, Roland; Nakamura, Shuichi; Shibata, Norio; Toru, Takeshi; Hoppe, Dieter: Asymmetric lithiation of 2-alkynyl aryl sulfides: enantio- and diastereoselective formation of allenyl aryl sulfides and their application in nickel-catalyzed cross-coupling reactions: Tetrahedron Letters (2007), 48(49), 8636-8642.
Geiger, Christian; Zelenka, Christel; Weigl, Manuela; Froehlich, Roland; Wibbeling, Birgit; Lehmkuhl, Kirstin; Schepmann, Dirk; Gruenert, Renate; Bednarski, Patrick J.; Wuensch, Bernhard: Synthesis of Bicyclic ? Receptor Ligands with Cytotoxic Activity: Journal of Medicinal Chemistry (2007), 50(24), 6144-6153.
Chedid, Roland Bou; Froehlich, Roland; Wibbeling, Birgit; Hoppe, Dieter: Enantioselective ?-deprotonation of alkyl-substituted O-1,3-butadien-2-yl carbamates and regioselective asymmetric homoaldol reaction: European Journal of Organic Chemistry (2007), (19), 3179-3190.
Chedid, Roland Bou; Bruemmer, Michael; Wibbeling, Birgit; Froehlich, Roland; Hoppe, Dieter: Stereo- and regiochemical divergence in the substitution of a lithiated alk-1-en-3-yn-2-yl carbamate: synthesis of highly enantioenriched vinylallenes or alk-3-en-5-yn-1-ols: Angewandte Chemie, International Edition (2007), 46(17), 3131-3134.
Bruens, Astrid; Wibbeling, Birgit; Froehlich, Roland; Hoppe, Dieter: Enantio- and diastereoselective synthesis of tetrahydrofurochromenes by sequential asymmetric homoaldol reaction and a Mukaiyama-type tetrahydrofuran cyclization: Synthesis (2006), (18), 3111-3121.
Hesse, Nadine; Froehlich, Roland; Wibbeling, Birgit; Wuerthwein, Ernst-Ulrich: 1,3,5-Triazapenta-1,3-dienes: useful building blocks for the synthesis of 1,2-dihydro-1,3,5-triazines and oligonitriles: European Journal of Organic Chemistry (2006), (17), 3923-3937.
Sax, Michael; Ebert, Kirstin; Schepmann, Dirk; Wibbeling, Birgit; Wuensch, Bernhard: Synthesis and NMDA-receptor affinity of 4-oxo-dexoxadrol derivatives: Bioorganic & Medicinal Chemistry (2006), 14(17), 5955-5962.
Paas, Martin; Wibbeling, Birgit; Froehlich, Roland; Hahn, F. Ekkehardt: Silver and rhodium complexes of stable, monomeric imidazolidin-2-ylidenes: Synthesis, reactivity and decomposition pathway: European Journal of Inorganic Chemistry (2006), (1), 158-162.
Oezluegedik, Mustafa; Uenaldi, Seda; Wibbeling, Birgit; Hoppe, Dieter: Synthesis of enantioenriched trans-fused bicyclo[4.4.0]-dec-3-enes and bicyclo[4.3.0]non-3-enes bearing a 1,5-lactone bridge: Advanced Synthesis & Catalysis (2005), 347(11-13), 1627-1631.
Geiger, Christian; Zelenka, Christel; Froehlich, Roland; Wibbeling, Birgit; Wuensch, Bernhard: Stereoselectivity during a Dieckmann analogous cyclization of (piperazin-2-yl)propionic acid esters: Zeitschrift fuer Naturforschung, B: Chemical Sciences (2005), 60(10), 1068-1070.
Kleigrewe, Nina; Steffen, Winfried; Bloemker, Tobias; Kehr, Gerald; Froehlich, Roland; Wibbeling, Birgit; Erker, Gerhard; Wasilke, Julia-Christina; Wu, Guang; Bazan, Guillermo C.: Chelate Bis(imino)pyridine Cobalt Complexes: Synthesis, Reduction, and Evidence for the Generation of Ethene Polymerization Catalysts by Li+ Cation Activation: Journal of the American Chemical Society (2005), 127(40), 13955-13968.
Otte, Ralf; Froehlich, Roland; Wibbeling, Birgit; Hoppe, Dieter: Solid-state structure and enantioselective reactions of a complex of a 1-thio-substituted propargyllithium and (-)-sparteine: Angewandte Chemie, International Edition (2005), 44(34), 5492-5496.
Kalkofen, Rainer; Brandau, Sven; Wibbeling, Birgit; Hoppe, Dieter: Synthesis of stereohomogeneous cyclopropanecarbaldehydes and cyclopropyl ketones by cycloalkylation of 4-hydroxy-1-alkenyl carbamates: Angewandte Chemie, International Edition (2004), 43(48), 6667-6669.
Mirk, Daniela; Wibbeling, Birgit; Froehlich, Roland; Waldvogel, Siegfried R.: Oxidative coupling of alkylated anisole derivatives using MoCl5: Synlett (2004), (11), 1970-1974.
Gerdes, Klaus; Sagar, Pramod; Froehlich, Roland; Wibbeling, Birgit; Wuerthwein, Ernst-Ulrich: 4,5-Dihydro-3H-benzo[c]azepines from 1,7-electrocyclization reactions of 2-aza-4,5-benzoheptatrienyllithium compounds: European Journal of Organic Chemistry (2004), (16), 3465-3476.
Zimmermann, Maik; Wibbeling, Birgit; Hoppe, Dieter: Synthesis of enantiomerically and diastereomerically pure 4-hydroxy-1,2-alkadienyl carbamates and their application in a modified Nazarov cyclization towards chiral cyclopentenones: Synthesis (2004), (5), 765-774.
Albrecht, Markus; Janser, Ingo; Kamptmann, Susanne; Weis, Patrick; Wibbeling, Birgit; Froehlich, Roland: Dicatechol-diimines: Easily accessible ligands for the self-assembly of dinuclear triple-stranded helicates: Dalton Transactions (2004), (1), 37-43.
Liptau, Patrick; Tebben, Ludger; Kehr, Gerald; Wibbeling, Birgit; Froehlich, Roland; Erker, Gerhard: Preparation of optically active ?-amino[3]ferrocenophanes - building blocks for chelate ligands in asymmetric catalysis. [Erratum to document cited in CA140:423780]: European Journal of Inorganic Chemistry (2003), (23), 4261.
Gralla, Gabriele; Wibbeling, Birgit; Hoppe, Dieter: Synthesis of 2-alkylidene-cycloalkane-1,3-diols via enantioselective intramolecular carbolithiation: Tetrahedron Letters (2003), 44(50), 8979-8982.
Snell, Alexander; Kehr, Gerald; Wibbeling, Birgit; Frohlich, Roland; Erker, Gerhard: Structural features of a sulfur-containing group 4 metalla[11]-crown-4 derivative: Zeitschrift fuer Naturforschung, B: Chemical Sciences (2003), 58(9), 838-842.
Liptau, Patrick; Tebben, Ludger; Kehr, Gerald; Wibbeling, Birgit; Froehlich, Roland; Erker, Gerhard: Preparation of optically active ?-amino[3]ferrocenophanes - building blocks for chelate ligands in asymmetric catalysis: European Journal of Inorganic Chemistry (2003), (19), 3590-3600.
Heimann, Jens; Schaefer, Hans J.; Froehlich, Roland; Wibbeling, Birgit: Cathodic cyclization of N-(oxoalkyl)pyridinium salts - formation of tricyclic indolizidine and quinolizidine derivatives in aqueous medium: European Journal of Organic Chemistry (2003), (15), 2919-2932.
Mollers, Christian; Prigge, Jorg; Wibbeling, Birgit; Frohlich, Roland; Brockmeyer, Andreas; Schafer, Hans J.; Schmalzlin, Elmar; Brauchle, Christoph; Meerholz, Klaus; Wurthwein, Ernst-Ulrich: Unsaturated hetero chains, XI. Polyamino-substituted 1-oxa-3,5-diazahexatrienes and 1-oxa-3,5,7-Triazaoctatetraenes (N-acyl-oligocyanamides): Synthesis, structures, cyclovoltammetry and NLO properties - experiment and theory: European Journal of Organic Chemistry (2003), (7), 1198-1208.
Huynh, Han Vinh; Seidel, Wolfram W.; Lugger, Thomas; Frohlich, Roland; Wibbeling, Birgit; Hahn, F. Ekkehardt: ortho-lithiation of benzene-1,2-dithiol: A methodology for ortho-functionalization of benzene-1,2-dithiol: Zeitschrift fuer Naturforschung, B: Chemical Sciences (2002), 57(12), 1401-1408.
Niehues, Martin; Kehr, Gerald; Erker, Gerhard; Wibbeling, Birgit; Frohlich, Roland; Blacque, Olivier; Berke, Heinz: Structural characterization of group 4 transition metal halide bis-Arduengo carbene complexes MCl4L2: X-ray crystal structure analyses and DFT calculations: Journal of Organometallic Chemistry (2002), 663(1-2), 192-203.
Marr, Felix; Frohlich, Roland; Wibbeling, Birgit; Diedrich, Christian; Hoppe, Dieter: The synthesis and configurational stability of enantioenriched ?-thioallyllithium compounds and the stereochemical course of their electrophilic substitution: European Journal of Organic Chemistry (2002), (17), 2970-2988.
Rogatchov, Viktor O.; Bernsmann, Heiko; Schwab, Pia; Frohlich, Roland; Wibbeling, Birgit; Metz, Peter: Preparation of enantiopure sultams by intramolecular Diels-Alder reaction of furan-containing vinylsulfonamides: Tetrahedron Letters (2002), 43(27), 4753-4756.
Gralla, Gabriele; Wibbeling, Birgit; Hoppe, Dieter: Synthesis of an Ethynyl Carbamate and Application for Enantioselective Cyclocarbolithiation: Organic Letters (2002), 4(13), 2193-2195.
Schultz-Fademrecht, Carsten; Tius, Marc A.; Grimme, Stefan; Wibbeling, B.; Hoppe, Dieter: Synthesis of enantioenriched 5-alkylidene-2-cyclopentenones from chiral allenyl carbamates: generation of a chiral lithium allenolate and allylic activation for a conrotatory 4?-electrocyclization: Angewandte Chemie, International Edition (2002), 41(9), 1532-1535.
Peters, Jan Georg; Seppi, Michael; Frohlich, Roland; Wibbeling, Birgit; Hoppe, Dieter: Stereoselective intermolecular carbolithiation of open-chain and cyclic 1-aryl-1-alkenyl N,N-diisopropylcarbamates coupled with electrophilic substitution. Observation of p-carboxylation in a benzyllithium derivative: Synthesis (2002), (3), 381-392.
Wu, He-Ping; Aumann, Rudolf; Frohlich, Roland; Wibbeling, Birgit: Stereocontrolled synthesis of angularly fused tricyclic ring systems by means of 1-metalla-1,3,5-hexatrienes (M = Cr, W): Chemistry - A European Journal (2002), 8(4), 910-916.
Ozlugedik, Mustafa; Kristensen, Jesper; Wibbeling, Birgit; Frohlich, Roland; Hoppe, Dieter: Nonracemic, chiral homoenolate reagents derived from (cycloalk-1-enyl)methyl carbamates and evaluation of their configurational stabilities: European Journal of Organic Chemistry (2002), (3), 414-427.
Bruggemann, Markus; Frohlich, Roland; Wibbeling, Birgit; Holst, Christiane; Hoppe, Dieter: Stereoselective formation of quaternary carbon centers with chiral 3-sulfonyl-1,3-oxazolidines and titanium enolates: Tetrahedron (2002), 58(2), 321-340.
Wu, He-Ping; Aumann, Rudolf; Frohlich, Roland; Wibbeling, Birgit; Kataeva, Olga: Organic synthesis via transition metal complexes, part 113. Highly selective formation of [4+2] and [4+3] cycloadducts of tetrahydroindenes generated in situ from a (1-alkynyl)carbene tungsten complex by the metalla-1,3,5-hexatriene route: Chemistry - A European Journal (2001), 7(23), 5084-5093.
Essers, M.; Wibbeling, B.; Haufe, G.: Synthesis of the first fluorinated cantharidin analogues: Tetrahedron Letters (2001), 42(32), 5429-5433.
Laqua, H.; Frohlich, R.; Wibbeling, B.; Hoppe, D.: Synthesis of enantioenriched indene-derived bicyclic alcohols and tricyclic cyclopropanes via (-)-sparteine-mediated lithiation of a racemic precursor and kinetic resolution during the cyclocarbolithiation: Journal of Organometallic Chemistry (2001), 624(1-2), 96-104.
Schultz-Fademrecht, Carsten; Wibbeling, Birgit; Froehlich, Roland; Hoppe, Dieter: Synthesis of enantiomerically enriched allenes by (-)-sparteine-mediated lithiation of alkynyl carbamates: Organic Letters (2001), 3(8), 1221-1224.
Deiters, Alexander; Wibbeling, Birgit; Hoppe, Dieter: Enantio- and diastereoselective synthesis of a 3,4-divinylpyrrolidine via asymmetric deprotonation and cyclization of a 9-chloro-5-aza-2,7-nonadiene: Advanced Synthesis & Catalysis (2001), 343(2), 181-183.
Dreier, T.; Unger, G.; Erker, G.; Wibbeling, B.; Frohlich, R.: Group 4 metallocenes containing hetaryl substituents at their ?-ligands: synthesis and characterization of the parent bis[2-(2-furyl)indenyl]zirconocene system: Journal of Organometallic Chemistry (2001), 622(1-2), 143-148.
Dreier, Thorsten; Erker, Gerhard; Froehlich, Roland; Wibbeling, Birgit: 2-Hetaryl-Substituted Bis(indenyl)zirconium Complexes as Catalyst Precursors for Elastomeric Polypropylene Formation: Organometallics (2000), 19(20), 4095-4103.
Hahn, F. Ekkehardt; Wittenbecher, Lars; Le Van, Duc; Frohlich, Roland; Wibbeling, Birgit: Novel 1,2,4-triphosphole and 1,2,3-triphosphetene derivatives from N,N'-bis(2,2-dimethylpropyl)benzimidazolin-2-ylidene and phosphaalkynes: Angewandte Chemie, International Edition (2000), 39(13), 2307-2310.
Heimbach, Dirk K.; Frohlich, Roland; Wibbeling, Birgit; Hoppe, Dieter: Asymmetric lithiation of an allyl carbamate induced by a complexing remote chiral substituent: Synlett (2000), (7), 950-954.
Steif, Frank; Wibbeling, Birgit; Meyer, Oliver; Hoppe, Dieter: Enantio- and diastereoselective synthesis of (protected) 2-formyl- and 2-(hydroxymethyl)-1-phenylalkane-1,3-diols from chiral 2-methoxy-3-tosyl-1,3-oxazolidines by subsequent asymmetric formylation and aldolization: Synthesis (2000), (5), 743-753.
Wu, He-Ping; Aumann, Rudolf; Frohlich, Roland; Wibbeling, Birgit: Organic syntheses via transition metal complexes, CII. 1,3-Dioxycyclopentadienes from (1-alkynyl)carbene tungsten complexes - domino cyclization/cycloaddition reactions: European Journal of Organic Chemistry (2000), (7), 1183-1192.
Kehr, Gerald; Frohlich, Roland; Wibbeling, Birgit; Erker, Gerhard: (N-pyrrolyl)B(C6F5)2-a new organometallic Lewis acid for the generation of Group 4 metallocene cation complexes: Chemistry - A European Journal (2000), 6(2), 258-266.
Warren, Timothy H.; Erker, Gerhard; Froehlich, Roland; Wibbeling, Birgit: 1,3-Doubly Bridged Group 4 Metallocenes by Intramolecular Reductive Coupling of Pendant Olefins: Organometallics (2000), 19(2), 127-134.
Strauch, Hans Christian; Roesmann, Rolf; Pacheiner, Silke; Erker, Gerhard; Frohlich, Roland; Wibbeling, Birgit: The reaction of (butadiene)tantalocene cation with bulky carbonyl derivatives: Journal of Organometallic Chemistry (1999), 584(2), 318-322.
Strauch, Hans Christian; Wibbeling, Birgit; Froehlich, Roland; Erker, Gerhard; Jacobsen, Heiko; Berke, Heinz: Reactions of (Butadiene)tantalocene Cation with Alkyl Isocyanides: Organometallics (1999), 18(19), 3802-3812.
Puke, Carsten; Erker, Gerhard; Wibbeling, Birgit; Frohlich, Roland: Structural and spectroscopic evidence for the occurrence of gauche-betaine intermediates in the thio Wittig reaction: European Journal of Organic Chemistry (1999), (8), 1831-1841.
Meiners, Uta; Cramer, Eva; Froehlich, Roland; Wibbeling, Birgit; Metz, Peter: A general route to the monomeric subunits of the macrotetrolides. A short synthesis of methyl nonactate: European Journal of Organic Chemistry (1998), (10), 2073-2078.
Hegemann, Klaus; Wibbeling, Birgit; Haufe, Guenter: Regioselectivity of oxysulfenylations of cycloocta-1,5-diene: Journal fuer Praktische Chemie/Chemiker-Zeitung (1998), 340(5), 455-458.
Woltering, Michael J.; Froehlich, Roland; Wibbeling, Birgit; Hoppe, Dieter: Stereoselective synthesis of hydroxylated indolizidines via (-)-sparteine-mediated kinetic resolution coupled with intramolecular carbolithiation: Synlett (1998), (7), 797-800.
Aumann, Rudolf; Gottker-Schnetmann, Inigo J.; Wibbeling, Birgit; Frohlich, Roland: Organic synthesis via transition metal complexes. 94. 1-Metalla-1,3,5,7-octatetraenes by 4-addition of (1,3-dien-2-yl)amines to (1-alkynyl)carbene complexes (M = Cr, W): Tetrahedron Letters (1998), 39(8), 795-798.
Temme, Oliver; Laschat, Sabine; Frohlich, Roland; Wibbeling, Birgit; Heinze, Jurgen; Hauser, Petra: Structural and electrochemical properties of a novel N,N'-dialkyl-substituted quinone diimine: Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1997), (10), 2083-2085.
Schulte, Joerg L.; Lalschat, Sabine; Kotila, Sirpa; Hecht, Juergen; Froehlich, Roland; Wibbeling, Birgit: Synthesis of ?6-(octahydroacridine)chromium tricarbonyl complexes with nonpolar tails via molecular sieves-catalyzed cyclization of N-arylimines and subsequent diastereoselective complexation: Heterocycles (1996), 43(12), 2713-2724.
Metz, Peter; Seng, Dieter; Froehlich, Roland; Wibbeling, Birgit: Intramolecular Diels-Alder reactions of vinylsulfonamides: Synlett (1996), (8), 741-742.
Bach, Thorsten; Joedicke, Kai; Wibbeling, Birgit: Reversal of the facial diastereoselectivity in the Paterno-Buechi reaction of silyl enol ethers carrying a chiral substituent in ?-position: Tetrahedron (1996), 52(33), 10861-10878.
Laschat, Sabine; Froehlich, Roland; Wibbeling, Birgit: Preparation of 2,3,4-Trisubstituted Piperidines by A Formal Hetero-Ene Reaction of Amino Acid Derivatives: Journal of Organic Chemistry (1996), 61(8), 2829-38.
Metz, Peter; Meiners, Uta; Cramer, Eva; Froehlich, Roland; Wibbeling, Birgit: A practical route to methyl nonactate: Chemical Communications (Cambridge) (1996), (3), 431-2.
Flitsch, Wilhelm; Lauterwein, Juergen; Leimkuehler, Manfred; Leaver, Derek; Lewinski, Ulrike; Mattes, Rainer; Temme, Robert; Wibbeling, Birgit: Diethyl pyrrolo[1,2-b]cinnoline-6,8-dicarboxylate, a product of an anomalous Vilsmeier reaction: Liebigs Annalen der Chemie (1990), (7), 627-30.
Flitsch, Wilhelm; Lewinski, Ulrike; Temme, Robert; Wibbeling, Birgit: Hydrazino-bridged annulenes. 7. Synthesis of diethyl 6H-9b,9c-diazacyclopenta[cd]phenalene-5,7-dicarboxylate: Liebigs Annalen der Chemie (1990), (7), 623-5.
Flitsch, Wilhelm; Lauterwein, Juergen; Temme, Robert; Wibbeling, Birgit: An anomalous Vilsmeier reaction: Tetrahedron Letters (1988), 29(27), 3391-2.
© R. Fröhlich - M. Baudler, J. Hellmann, P. Bachmann, K.-F. Tebbe, R. Fröhlich, M.Fehér: tBu6P8 und tBu6As8 - zwei neue elementhomologe Bicyclen unterschiedlicher Struktur. Angew. Chem. 93, 415 - 417 (1981).
- M. Fehér, R. Fröhlich, K.-F. Tebbe: Beiträge zur Strukturchemie phosphorhaltiger Ketten und Ringe. 2. Die Kristall- und Molekülstruktur des Diphosphaborirans (t-BuP)2 BNEt2. Z. anorg. allg. Chem. 474, 31 – 42 (1981).
- R. Fröhlich, K.-F. Tebbe: Untersuchungen an Polyhalogeniden. 2. Cesiumdicyanotriiodid. Acta Cryst. B38, 71 - 75 (1982).
- R. Fröhlich, K.-F. Tebbe: Beiträge zur Strukturchemie phosphorhaltiger Ketten und Ringe. 3. 1,2,4,5-Tetra-tert-butyl-3,3,6,6-tetramethyl-1,2,4,5-tetraphospha-3,6-disilacyclohexan, [Me2Si(t-BuP)2]2, ein P4Si2-Sechsring in der klassischen Wannenform. Acta Cryst. B38, 115 -120 (1982).
- M. Fehér, R. Fröhlich, K.-F. Tebbe: Beiträge zur Strukturchemie phos-phorhaltiger Ketten und Ringe, IV. Die Kristall- und Molekülstruktur des Bicyclotetraphosphans t-Bu6P8. Z. Kristallogr. 158, 241 - 253 (1982).
- R. Fröhlich, K.-F. Tebbe: Beiträge zur Strukturchemie arsenhaltiger Ketten und Ringe, I. Die Kristall- und Molekülstruktur des Octaarsans t-Bu6As8. Z. Kristallogr. 158, 255 - 270 (1982).
- K.-F. Tebbe, R. Fröhlich: Beiträge zur Strukturchemie phosphorhaltiger Ketten und Ringe, V. Die Molekül- und Kristallstruktur des 1.2.3.4-Tetra-tert-butyl-1.4-bis(trimethylsilyl)tetraphosphans, Me3Si-(t-BuP)4-SiMe3. Z. Naturforsch. 37b, 534 - 541 (1982).
- L. Bohatý, J. Liebertz, R. Fröhlich: Die Kristallstruktur von NaCrP2O7. Z. Kristallogr. 161, 53 - 59 (1982).
- L. Bohatý, R. Fröhlich, K.-F. Tebbe: Die Kristallstrukturen von Calcium-Bis[µ-(+)-tartrato(4-)-O,O':O",O"']-bis[antimonat(III)] Dihydrat, Ca[Sb2{(+)-C4H2O6}2].2H2O, und Barium-Bis[µ-(+)-tartrato(4-)-O,O':O",O"']-bis[antimonat(III)] Trihydrat, Ba[Sb2{(+)-C4H2O6}2].3H2O. Acta Cryst. C39, 59 - 63 (1983).
- K.-F. Tebbe, R. Fröhlich: Untersuchungen an Polypseudohalogeniden, II. Darstellung und Kristallstruktur des Rubidiumdicyanotriiodids, Rb[I(ICN)2]. Z. Naturforsch. 38b, 549 - 553 (1983).
- K.-F. Tebbe, R. Fröhlich: Halogencyane als Liganden. Darstellung und Kristallstruktur des [Fe(NCBr)6](FeBr4)2.2BrCN. Z. anorg. allg. Chem. 498, 7 - 14 (1983).
- L. Bohatý, R. Fröhlich: Die Kristallstruktur von Strontium-Bis[µ-(+)-tartrato(4-)-O,O':O",O"']-bis[antimonat(III)] Dihydrat, Sr[Sb2{(+)-C4H2O6}2].2H2O. Z. Kristallogr. 163, 261 -265 (1983).
- K.-F. Tebbe, R. Fröhlich: Untersuchungen an Polypseudohalogeniden. 3. Darstellung und Kristallstruktur von Kaliumdicyanoiodat(I)-Diiminooxal-säurediethylester(1/1), K[I(CN)2]. C6H12N2O2. Z. anorg. allg. Chem. 505, 7 - 18 (1983).
- K.-F. Tebbe, R. Fröhlich: Untersuchungen an Polypseudohalogeniden. 4 . Darstellung und Kristallstruktur von Kalium(0,6)Rubidium(0,4) dicyanoiodat-(I)-Diiminooxalsäure-diethylester (2/1), KxRb1-x[I(CN)2]. 1/2C6H12N2O2 (x=0,6). Z. anorg. allg. Chem. 505, 19 -31 (1983).
- K.-F. Tebbe, R. Fröhlich: Beiträge zur Strukturchemie phosphorhaltiger Ketten und Ringe, 7. Die Kristall- und Molekülstruktur des Diphospha-germetans (tBuP)2(GePh2)2. Z. anorg. allg. Chem. 506, 27 - 41 (1983).
- L. Bohatý, R. Fröhlich: Die Kristallstruktur von Rubidiumtartrat Rb2[(+)-C4H4O6]. Z. Kristallogr. 164, 291 - 295 (1983).
- R. Fröhlich, L. Bohatý, J. Liebertz: Die Kristallstruktur von Wismutborat, BiB3O6. Acta Cryst. C40, 343 -344 (1984).
- R. Fröhlich: Crystal structure of the low-temperature form of BaB2O4. Z.Kristallogr. 168, 109 - 112 (1984).
- J. Liebertz, R. Fröhlich: Struktur und Kristallchemie von Ba2M(B3O6)2 mit M=Ca,Cd,Mg,Co und Ni. Z. Kristallogr. 168, 293 - 297 (1984).
- R. Fröhlich: Struktur von Cuneansäureamid (Pentacyclo[4.3.0.02,4.O3,8.O5,7]nonan-4-carbonsäureamid), C10H11NO. Acta Cryst. C40, 1289 - 1290 (1984).
- B. Fuchs, R. Fröhlich, H. Musso: Struktur und magnetische Anisotropie mesitylsubstituierter Ferrocene. Chem. Ber. 118, 1968 - 1982 (1985).
- R. Fröhlich, H. Musso: Notiz über die Kristallstruktur des Bimesityls. Chem. Ber. 118, 4649 - 4651 (1985).
- R. Fröhlich, G. Mattern, W. Krumbe: Crystal structure of guanidium fumarate dihydrate, [CN3H6]2.C4H2O4.2H2O. Z. Kristallogr. 172, 315 - 317 (1985).
- R. Fröhlich, G.D. Nigam, N.P.Daw: Structure of the 1-2'-Bromophenyl-1,2,3,4- tetrahydro-4,4,6-trimethyl-2-thioxopyrimidine, C13H15N2SBr. Z. Kristallogr. 180, 151 - 155 (1987).
- W. Krumbe, S. Haussühl, R. Fröhlich: Crystal structure and physical properties of monoclinic guanidium tartrate hydrate, [C(NH2)3]2 (+)C4H4O6.H2O. Z. Kristallogr. 187, 309 - 318 (1989).
- G.D. Nigam, G. Mattern, R. Fröhlich: Crystal structures of 1-(m-nitro-phenyl)-2,2-dicarboethoxy-3-phenyl-pyrrolidin-5-one (C22H22N2O7) (I) and 1-(p-chlorophenyl)-2,2-dicarboethoxy-3¬phenyl-pyrrolidin-5-one (C22H22NO5Cl) (II). Z. Kristallogr. 189, 293 - 299 (1989).
- B. Krebs, H.-U. Hürter, J. Enax, R. Fröhlich: Selenoarsenate aus wäßriger Lösung: Die Kristallstruktur von Na3AsO3Se.12H2O und Na3AsSe4.9H2O. Z. anorg. allg. Chem. 581, 141 - 152 (1990).
- J. Grobe, D. Le Van, B. Krebs, R. Fröhlich, A. Schiemann: Ein neuer Koordinations-typ bei acyclischen Phosphaalkenen: F3CP=C(F)NMe2 als (*1-µ2)4e-Donator. J. of Organometallic Chemistry 389, C29 - C33 (1990).
- N. Kuhn, G. Henkel, H. Schumann, R. Fröhlich: Die Bindungsver-hältnisse in Phosphantelluriden. Eine empirische NMR-Studie und die Kristallstruktur von (iso-C3H7)3PTe. Z. Naturforsch. 45b, 1010 - 1018 (1990).
- L. Bohatý, R. Fröhlich: Tri-Cesium-Strontium{µ-thiocyanato (S)-bis[trithiocyanato(S)-cuprate(I)]}, Cs3Sr[Cu2(SCN)7]: Crystal growth, crystal structure, electro-optic and electrostrictive properties. Z. Kristallogr. 194, 33 - 40 (1991).
- W.G. Haanstra, W.L. Driessen, J. Reedijk, R. Fröhlich, B. Krebs:Coordination compounds of the ligand 1,6-bis(3,5-di¬methyl-1-pyrazolyl)-2,5-dithiahexane (bddh) with divalent nickel, cobalt and zinc salts. X-ray crystal structure of Co(bddh)(NCS)2. Inorg. Chim. Acta 185, 175 - 180 (1991).
- B. Krebs, B. Lettmann, H. Pohlmann, R. Fröhlich: Crystal structure and properties of a novel diorganotin molybdate, (n-Bu4N)2[(Ph2Sn)2(µ-OH)2 (µ-MoO4)2].4CH2Cl2. Z. Kristallogr. 196, 231 - 241 (1991).
- L. Bohatý, R. Fröhlich: Crystal growth, crystal structure, optical, electro-optic and electrostrictive properties of the complex silver thiocyanates Cs3Sr[Ag2(SCN)7] and Cs3Ba[Ag2(SCN)7]. Z. Kristallogr. 198, 33 - 39 (1992).
- N. Sträter, R. Fröhlich, A. Schiemann, B. Krebs, M. Körner, H. Suerbaum, H. Witzel: Crystallization and Preliminary Crystallographic Data of Purple Acid Phosphatase from Red Kidney Beans. J. of Molecular Biology 224, 511 - 513 (1992).
- P. Metz, M. Fleischer, R. Fröhlich: Vinylsulfonyl Chloride, Ketene Equivalent for the Intramolecular Diels-Alder Reaction, SYNLETT, 985 - 987 (1992).
- G. Cordier, V. Müller, R. Fröhlich: Crystal structure of potassium thallide (49/108), K49Tl108. Z. Kristallogr. 203, 148 - 149 (1993).
- E. Kolehmainen, K. Laihia, M. Heinänen, K. Rissanen, R. Fröhlich, J. Korvola, P. Mänttäri, R. Kauppinen: Oxygen-containing Bicyclic Monoterpenes. 1H, 13C and 17O NMR Spectroscopic and X-Ray Diffraction Studies of Seven Oxidation Products of (+)-3-Carene. J. Chem. Soc. Perkin Trans. 2, 641 - 648 (1993).
- P. Metz, S. Bertels, R.Fröhlich: An Enantioselective Approach to 3*-Hydroxy-15-rippertene. Construction of the Tetracyclic Ring System. J. Am. Chem. Soc. 115, 12595 - 12956 (1993).
- J. Wunderle, J. Scholz, R. Fröhlich: Crystal structure of 1,2,3,4-tetra- phenyl-1,4- diaza-1,3-butadiene, C26H20N2. Z. Kristallogr. 208, 277 - 279 (1993).
- L. Bohatý, R. Fröhlich: Crystal growth, crystal structure, optical, electro-optic and electrostrictive properties of the orthorhombic tartrato-antimonate nitrate KZn[Sb2{(+)- C4H2O6}2]NO3.5H2O, ("KZnSbTN"). Z. Kristallogr. 209, 14 - 17 (1994).
- G. Abdul Hadi, J. Wunderle, K.-H. Thiele, R. Fröhlich: Crystal structure of 5- cyclopentadienyl-1-titana-1-chloro-2,5-bis(p-methoxyphenyl)-2,5-diaza-cyclopent-3- ene, C21H21ClN2O2Ti. Z. Kristallogr. 209, 372 (1994).
- G. Erker, Ch. Mollenkopf, M. Grehl, R.Fröhlich, C. Krüger, R. Noe, M. Riedel: Formation and Structure of a Novel Large-Ring Group 4 ansa-Metallocene Complex. Organometallics, 13, 1950 - 1955 (1994).
- P. Metz, U. Meiners, R. Fröhlich, M. Grehl: Stereoselective Synthesis of Substituted Cyclohexenols from a Furan-Derived Sultone via Tandem Elimination/1,6-Addition. J. Org. Chem. 59, 3687 - 3689 (1994).
- B. Temme, G. Erker, R. Fröhlich, M. Grehl: Heterodimetall-Betain-Chemie: Katalytische und stöchiometrische Alkinylkupplungen unter dem gemeinsamen Einfluß von Zirconium und Bor. Angew. Chem. 106, 1570 - 1572 (1994).
- B. Temme, G. Erker, R Fröhlich, M. Grehl: Boron-induced Formation of a Methylenecyclopropene Unit in the Bis(cyclopentadienyl)zirconium Coordination Sphere. J. Chem. Soc., Chem. Commun. 1713 - 1714 (1994).
- G. Erker, D. Wingbermühle, M. Grehl, R. Fröhlich: Borylation of a Stable Primary Enamine. Chem. Ber. 127, 1331 - 1332 (1994).
- M. Bendix, M. Grehl, R. Fröhlich, G. Erker: Reaction of "Floriani´s Metallaoxirane" [(Cp2ZrCl2(µ:*1(O),*2(C,O)-CH2O)] with Isonitriles. Organometallics 13, 3366 - 3369 (1994).
- D. Röttger, G. Erker, M. Grehl, R. Fröhlich: Formation and Structures of Cationic Pyrazol and Pyrazolyl Zirconocene Complexes. Organometallics 13, 3897 - 3902 (1994).
- R. Fröhlich, R. K. Arni, A. Bozopoulos, C. A. Kavounis. The Crystal Structure of benzoyl-histidine monohydrate. Z. Krist. 209, 816 -817 (1994).
- R. Fröhlich, M. Grehl, S. Kramm-Glade, S. Laschat: Two Octahydroacridines. Acta Cryst. C50, 1798 - 1801 (1994).
- R. Fröhlich, M. Grehl, S. Wilker, G. Erker, P. Mazerolles, C. Laurent: Structural Charakterization of Dihydroselenapyrans prepared by the Reaction of Diarylselenoketones with Conjugated Dienes. Z. Naturforsch. 49b, 1397 - 1801 (1994).
- M. Paetow, M. Kotthaus, M. Grehl, R. Fröhlich, D. Hoppe: Enantioselective Cyclopropane Synthesis. Stereodivergent Courses of the 1,3-Elimination Reaction, Dependent on the Lewis Acid. Synlett, 1994, 1034 - 1036.
- R. Aumann, M. Kößmeier, K. Roths, R. Fröhlich: Homopyrroles by Cycloadditions of NH-Enamines to Alkynylcarben Tungsten Complexes via 1-Metalla-1,3,5-Trienes. SYNLETT, 1994, 1041 - 1044.
- P. Metz, M. Fleischer, R. Fröhlich: Intramolecular Diels-Alder Reaction of Vinylsulfonates derived from Hydroxyalkyl substituted 1,3-Dienes and Oxidative Desulfurization of the resultant Sultones. Tetrahedron, 51, 711 - 732 (1995).
- B. Klotz-Berendes, H. J. Schäfer, M. Grehl, R. Fröhlich: Diastereoselektive Kupplung anodisch erzeugter Radikale mit chiralen Amidgruppen. Angew. Chem. 107, 218 - 220 (1995).
- R. Aumann, B. Jasper, R. Fröhlich: Phosphinonaphthalenes and Phosphinoindenes by Cyclization of Alkynyl Carbene Complexes (M=Cr,W). Organometallics, 14, 231 - 237 (1995).
- G. Erker, Ch. Psiorz, R. Fröhlich, M. Grehl, C. Krüger, R, Noe, M. Nolte: Preparation and Catalytic Application of a Novel Very Rigid Group 4 Ansa-Metalocene System, Tetrahedron, 51, 4347 -4358 (1995).
- Ch. Psiorz, G. Erker, R. Fröhlich, M. Grehl: Synthesis and Applications of Ring- substituted Analogues of the [4-(*-Cyclopentadienyliden)-4,7,7-trimethyl-(4,5,6,7- tetrahydro-*5-indenyl)]ZrCl2 Ansa-Metallocene System. Chem. Ber., 128, 357 - 364 (1995).
- R. Gertzmann, M. H. Möller, U. Rodewald, R. Fröhlich, M. Grehl, E.-U. Würthwein: Metallated Ketenimines: Deprotonation of N-Isopropyl-diphenyl-ketenimine and Subsequent Trapping Reactions with Electrophiles. A Theoretical and Experimental Study, Tetrahedron, 51, 3767 - 3786 (1995).
- M. Grehl, R. Fröhlich, S. Thiele: Structure of Na2O2.8H2O. Acta Cryst. C., 51 1038 - 1040 (1995).
- G. Erker, Ch. Psiorz, R. Fröhlich: A Rigid C1-Bridged Ansa-Zirconocene Derived Catalyst System Suited for Stereoselective Low Molecular Weight Polypropylene Formation. Z. Naturforsch., 50b, 469 - 475 (1995).
- R. Aumann, B. Jasper, R. Fröhlich: Hydrazinolysis of Alkynylcarbene Complexes of Chromium and Tungsten. - Formation of Hydrazinocarbene-, Imidate-, Pyrazolidinylidene- and Nitrile-Complexes. Organometallics, 14, 2447 - 2455 (1995).
- G. Erker, W. Ahlers, R. Fröhlich: Formation of a Stable Cyclopropenylium-Betain. J. Am. Chem. Soc., 117, 5853 - 5854 (1995).
- S. Thiele, G. Erker, C. Fritze, Ch. Psiorz, R.Fröhlich: Synthesis of a Chiral-like Ansa- zirconocene Complex and its Use for the Catalytic Formation of Low Molecular Weight Polypropylene. Z. Naturforsch., 50b, 982 - 989 (1995).
- R. Aumann, B. Jasper, R. Fröhlich: Aminomethylenation of [2-(NH-Amino)ethenyl] carbene Complexes of Chromium and Tungsten. Organometallics, 14, 3167 - 3172 (1995).
- R. Aumann, B. Jasper, R. Fröhlich: Allenylidene Complexes from [2-Aminoethenyl) carbene]chromium complexes. Organometallics, 14, 3173 - 3177 (1995).
- T. Bürgi, H. Berke, D. Wingbermühle, C. Psiorz, R. Noe, T. Fox, M. Knickmeier, M. Berlekamp, R. Fröhlich, G. Erker: Monitoring the electronic features of rigid C1 bridged group 4 ansa-metallocenes by using the dynamic and structural properties of their s-cis- *4-butadiene complexes. J. Organomet. Chem., 497, 149 - 159 (1995).
- B. Temme, G. Erker, J. Karl, H. Luftmann, R. Fröhlich, S. Kotila: Reaktion von (Butadien)zirconocen mit Tris(pentafluorphenyl)boran - ein neuer Weg zur Herstellung Alumoxan-freier Metallocen-Ziegler- Katalysatoren. Angew. Chem., 107, 1867 - 1869 (1995).
- R. Gertzmann, R. Fröhlich, M. Grehl, E.-U. Würthwein. Metallated Ketenimines: Quinazoline Derivatives from Base Induced Dimerization of N-Phenyldiethyl- ketenimine. An Experimental and Theoretical Study. Tetrahedron, 51, 9031 - 9044 (1995).
- U. Peuchert, L. Bohatý, R. Fröhlich: K2NiWO2(PO4)2: a New Structure Type Related to KTiOPO4 (KTP). Acta Cryst. C, 51, 1719 - 1721 (1995).
- P. Becker, L.Bohatý, R. Fröhlich: CsNbOB2O5: the Basic Structure-Type of the Borates AMOB2O5 (A=K,Rb,Cs,Tl; M=Nb,Ta). Acta Cryst. C, 51, 1721 - 1723 (1995).
- R. Gorny, H. J. Schäfer, R. Fröhlich: Diastereoselektive kathodische Cyclisierung von 1-(4- und 1-(3-Oxoalkyl)pyridinium Salzen zu Chinolizidin- bzw. Indolizidin- Derivaten. Angew. Chem., 107, 2188 - 2191 (1995).
- D. Röttger, G. Erker, R. Fröhlich: Formation of a [*-(*1-N:*2-C,N)-Arylcyanide] biszirconocene Cation by Ligand Exchange Reaction. Chem. Ber., 128, 1045 - 1046 (1995).
- C. Fritze, G. Erker, R. Fröhlich. Formation of the tetrabenzodispiro [4,3,4]-trideca- tetraene by a titanium mediated fluorenyl coupling reaction. J. Organomet. Chem., 501, 41 - 45 (1995).
- D. Röttger, G. Erker, R. Fröhlich, M. Grehl, S. J. Silverio, R. Gleiter: Determination of the Stabilization Energy of Planar-tetracoordinate Carbon in Dynamic Dinuclear (µ- Hydrocarbyl)biszirconocene Cation Complexes and Detection of a Strong Organometallic Memory Effect in their Formation. J. Am. Chem. Soc., 117, 10503 - 10512, (1995).
- R. Aumann, B. Jasper, R. Fröhlich, S. Kotila: Bis(carbene) Complex of Chromium Connected by a Conjugated Ammonium Pentadienide Bridge. J. Organomet. Chem., 502, 137 - 141 (1995).
- M. Könemann, G. Erker, M. Grehl, R. Fröhlich, E.-U. Würthwein: Cyclotetrameric Supersandwich Structure of a Structurally Confined C1-bridged Dilithiobis (cyclopentadienide) - a Case of Supramolecular LiCp-association. J. Am. Chem. Soc., 117, 11215 - 11219 (1995).
- D. Röttger, G. Erker, R. Fröhlich, S. Kotila: Stabilization of a Planar tetracoordinate Carbon Center in an Organometallic Complex containing both a Zirconocene and a Hafnocene Moiety. Chem. Ber., 129, 1 - 3 (1996).
- D. Röttger, G. Erker, R. Fröhlich, S. Kotila: Reaction of Alkylzircononcene Cation Complexes with (R-C*C)2SiR2 Reagents: Preparation of Heterodimetallic Compounds Containing a µ-Alkynyl Ligand Bridging between Zirconium and Silicon. Chem. Ber., 129, 5 - 9 (1996).
- J. Ruwwe, G. Erker, R. Fröhlich: Die Bildung eines Zirconocen-Betain-Systems durch eine elektrophile Substitutionsreaktion mit B(C6F5)3 am Cyclopentadienylliganden. Angew. Chem., 108, 108 -110 (1996).
- S. Pietz, G. Haufe, R. Fröhlich, M. Grehl: syn-1,5-Dimethylbi-cyclo[3.2.1]oct-8-yl-N- phenylcarbamate. Acta Cryst C., 52, 469 - 470 (1996).
- N. Schulte, R. Fröhlich, J. Hecht, E.-U. Würthwein: Synthesis, Structure, and Reactivity of Alkoxy-Substituted 2,4-Diazapentadienylium-, 2,4,6Triazahepta- trienylium-, and 2,4,6,8-Tetraazanonatetranylium Salts. Liebigs Ann. Chem., 1996, 371 - 380.
- P. Metz, U. Meiners, E. Cramer, R. Fröhlich, B. Wibbeling: A practical route to methyl nonactate. J. Chem. Soc., Chem. Commun., 1996, 431 -432.
- R. Aumann, K. Roths, B. Jasper, R. Fröhlich: cis-1-Metalla-1,3,5-hexatrienes (Butadienylcarbene Complexes) of Tungsten via Ring-Opening of Pranylidene Complexes. Organometallics, 15, 1257 -1264 (1996).
- D. Röttger, J. Pflug, G. Erker, S. Kotila, R.Fröhlich: Reaction of the Organometallic Planar-tetracoordinate Carbon Compound [(Cp2Zr)2 (*-C*C-CH3)(*-*1-C:*2-C,C- CH3CCCH3)]+[BPh4]- with Alkyl Isocyanides. Organometallics, 15, 1265 - 1267 (1996).
- H. Paulsen, C. Graeve, R. Fröhlich, D. Hoppe: Enantioselective Synthesis of Bicyclic Tetrahydrofuran Carboxaldehydes from Chiral 3-Stannylbut-1-enyl Carbamates by Tandem Homoaldol/Aldol Reaction. Synthesis, 1996, 145 - 148.
- S. Lambrecht, H. J. Schäfer, R. Fröhlich, M. Grehl: A Highly Stereoselective Synthesis of a Tetrahydrofluorene via a Domino Claisen Rearrangement Hetero-Ene Reaction. Synlett, 1996, 283 - 284.
- R. Aumann, B. Jasper, R. Fröhlich: Stereoselective Route to (Amino-alkynylcarbene) Chromium Complexes via Addition of (1-Alkynyl) Lithium Compounds to Isocyanide Ligands. Organometallics, 15, 1942 - 1950 (1996).
- S. Laschat, R. Fröhlich, B. Wibbeling: Preparation of 2,3,4- Trisubstituted Piperidines by Formal Hetero-Ene Reaction of Amino Acid Derivatives. J. Org. Chem., 61, 2829 -2838 (1996).
- M. Koskenlinna, J. Valkonen, R. Fröhlich: Amminemercury(II) Selenite. Acta Cryst. C., 52, 1072 - 1074 (1996).
- D. Röttger, G. Erker, R. Fröhlich, S. Kotila: Reaction of dimethylzircononcene with imidazole in the presence of tris(pentafluorophenyl)-borane. J. Organomet. Chem., 518, 17 - 19 (1996).
- O. Goj, G. Haufe, R. Fröhlich: 1,3-Dicyclohexyl-2,4-bis(cyclohexyl-imino)1,3- diazetidine: Dimer of Dicyclohexylcarbodiimide. Acta Cryst. C., 52, 1554 - 1556 (1996).
- D. Röttger, G. Erker, R. Fröhlich: Formation of stable organometallic planar-tetraco- ordinate carbon compounds containing a cationic (*-R1CCR2)[*-chloro (ZrCp2)2] framework. J. Organomet. Chem., 518, 221 - 225 (1996).
- H.-C. Strauch, G. Erker, R. Fröhlich: Self-Assembly of Substituted 6-Hydroxy-trans-3- hexenoic Acids - Formation of Extended Ribbon-Like Structures by Hydrogen Bonds. Chem. Ber., 1996, 1029 - 1034.
- T. Klabunde, N. Sträter, R. Fröhlich, H. Witzel, B. Krebs: Mechanism of Fe(III)-Zn(II) Purple Acid Phosphatase Based on Crystal Structures. J. Mol. Biol., 259, 737 - 748 (1996).
- D. Kowalski, R. Fröhlich, G. Erker: The Structural Side of Conjugation in Some Stable Primary Enamines and Related Systems. Z. Naturforsch., 51b, 1053 - 1059 (1996).
- P. Metz, D. Seng, R. Fröhlich, B. Wibbeling: Intramolecular Diels-Alder Reactions of Vinylsulfoamides. Synlett, 1996, 741 - 742.
- S. Hintz, R. Fröhlich, J. Mattay: PET-Oxidative Cyclization of Unsaturated Silyl Enol Ethers. RegioselectiveControl by Solvent Effects. Tetrahedron Letters, 37, 7349 - 7352 (1996)..
- M. Oberhoff, L. Duda, J. Karl. R. Mohr, G. Erker, R. Fröhlich, M. Grehl: The Isocyanate Route of Cyclopentadienyl-Carboxamide and Cyclopentadienyl-Amino Ester-substituted Metallocene Complexes, Organometallics, 15, 4005 - 4011 (1996).
- R. Aumann, R. Fröhlich, S. Kotila: [2-(Alkenyloxy)ethenyl]- and [2-(Aryloxy)ethenyl] carbene Complexes from (1-Alkenyl)carbene Complexes of Chromium and Tungsten and Their Fragmentation to 2,4-Dien-5-ones. Organometallics, 15, 4842 - 4851 (1996).
- R. Aumann, A. Meyer, R. Fröhlich: Steroid-like Ring Skeletons by Cyclohexadiene Annulation to Enamines with Alkynylcarbene Complexes of Chromium and Tungsten via Pyran-2-ylidene Complexes. J. Am. Chem. Soc., 118, 10853 - 10861 (1996).
- S. Klötgen, R. Fröhlich, E.-U. Würthwein: 1,7-Electrocyclisation Reactions of 2- Azaheptatrienyl Lithium Compounds: Synthesis of 1-Acyl-2,3-dihydroazepines. Tetrahedron, 52, 14801-14812 (1996)..
- R. Aumann, , A. Meyer, R. Fröhlich: Regioselective [C3+C2] Cyclopentadiene Annulation to Enamines with Alkynylcarbene Complexes of Chromium and Tungsten as Novel C3 Building Blocks. Organometallics, 15, 5018 -5027 (1996).
- M. Berlekamp, G. Erker, R. Fröhlich: Structural Assembly of Rigid Hydroxycarboxylic Acid Frameworks - Solid State Structures of Two Substituted 6-Hydroxy-trans-3- hexenoic Acids. Z. Naturforsch., 51b, 1649 - 1654 (1996).
- J. L. Schulte, S. Laschat, S. Kotila, J. Hecht, R. Fröhlich, B. Wibbeling: Synthesis of *6-(Octahydroacridine)Chromiumtricarbonyl Complexes with Non-Polar Tails via Molecular Sieves-Catalyzed Cyclization of N-Arylimines and Subsequent Diastereoselective Complexation, Heterocycles, 43, 2713 -2724 (1996).
- I. Schlachter, R. Fröhlich, J. Mattay: Generation of Chiral Olefins based on L-Aspartic Acid. J. prakt. Chem., 339, 66 - 70 (1997).
- W. Ahlers, B. Temme, G. Erker, R. Fröhlich, T. Fox: Dynamic features of the zirconocene-borone-betaine complexes obtained by treatment of bis(alkynyl)- zirconocenes with the tris(pentafluorophenyl)borane Lewis-acid. J. Organomet. Chem., 527, 191 - 201 (1997).
- M. Albrecht, R. Fröhlich: Controlling the Orientation of Sequential Ligands in the Self- Assembly of Binuclear Coordination Compounds. J. Am. Chem. Soc., 119, 1656 - 1661 (1997).
- J. Plesek, A. Franken, R. Fröhlich: The Structure of [6,6´-µ-S(1,7-C2B9H19)2-2-Co]- [PPh4]+. Collect. Czech. Chem. Commun., 62, 57 - 61 (1997).
- T. Brackemeyer, G. Erker, R. Fröhlich: Synthesis and Structure of Donor-Ligand-Stabilized Tris(cyclopentadienyl)zirconium Cations. Organometallics, 16, 531 - 536 (1997).
- W. Ahlers, B. Temme, G. Erker, R. Fröhlich, F. Zippel: Formation, Structure, and Dynamic Behavior of a Novel Dinuclear Cationic µ-2,4-Hexadiyne Bis(zirconocene) Complex. Organometallics, 16, 1440 - 1444 (1997).
- Th. Brackemeyer, G. Erker, R. Fröhlich, J. Prigge, U. Peuchert: Cp3Zr(acetonitrile)+: Structure of an Electron-Rich Organometallic d0-Cation. Chem. Ber./Recueil, 130, 899 - 902 (1997).
- T. Bach, K. Jödicke, K. Kather, R. Fröhlich: 1,3-Allylic Strain as an Control Element in the Paterno-Büchi Reaction of Chiral Silyl Enol Ethers: Synthesis of Diastereomerically Pure Oxetanes Containing Four Contiguous Stereogenic Centers. J. Am. Chem. Soc., 119 2437 - 2445 (1997).
- A. Bertuleit, C. Fritze, G. Erker, R. Fröhlich: Uncovering Alternative Reaction Pathways Taken by Group 4 Metallocene Cations: Facile Intramolecular CH- Activation of Cp-(Dimethylamino)alkyl Substituents by a Methylzirconocene Cation. Organometallics, 16, 2891- 2899 (1997).
- M. Könemann, G. Erker, R. Fröhlich, S. Kotila: Diastereoselective Synthesis of a Bis(tetrahydroindenyl)zirconocene Dichloride with „Ansa-Fused“ Annulated Six- membered Ring Systems: A Specific Solution of the Synthetic rac/meso-Group 4 Bent Metallocene Problem. Organometallics, 16, 2900 - 2908 (1997).
- W. Ahlers, G. Erker, R. Fröhlich, U. Peuchert: Synthesis, Structure, and Dynamic Behavior of (-Aldimido)(-1:2-alkyne)-biszirconocene Cation Complexes That Contain Planar-Tetracoordinate Carbon. Chem. Ber./Recueil, 130, 1069 - 1077 (1997).
- W. Ahlers, G. Erker, R. Fröhlich, F. Zippel: Characteristic Features of Neutral Cyclopropenylium-Like Compounds: Synthesis, Structure, and Chemical Behavior of a Cyclopropenylioborate Betaine. Chem. Ber./Recueil, 130, 1079 - 1084 (1997).
- J. Karl, G. Erker, R. Fröhlich: Cp2*Zr(µ-C4H6)B(C6F5)3, a first example of a stable unbridged homogeneous metallocene-betaine Ziegler catalyst system. J. Organomet. Chem., 535, 59 - 62 (1997).
- R. Aumann, R. Fröhlich, F. Zippel: 5-Aza-1-metalla-1,3,5,7-octatetraenes and 2H- Pyrrole and 2H-Dihydroazete Complexes from (1-Alkynyl)carbene Complexes (M = Cr, W) and Alkenyl N-H Imidates. Organometallics, 16, 2571 - 2580 (1997).
- O. Temme, S. Laschat, R. Fröhlich, B. Wibbeling, J. Heinze, P. Hauser: Structural and electrochemical properties of a novel N,N´-dialkyl-substituted quinone diimine. J. Chem. Soc., Perkins Trans. 2, 2083 - 2085 (1997).
- R. Skupin, T. G. Cooper, R. Fröhlich, J. Prigge, G. Haufe: Lipase-catalyzed resolution of both enantiomers of Ornidazole and some analogues. Tetrahedron Asymmetry, 8, 2453 - 2464 (1997).
- A. Beckmann, R. Fröhlich, E.-U. Würthwein: The Synthesis of 1-Thioacyl-Oligonitriles. Tetrahedron Letters, 31, 5481 - 5484 (1997).
- A. A. H. van der Zeijden, Ch. Mattheis, R. Fröhlich: Synthesis and Characterization of Monocyclopentadienyl Titanium and Zirconium Complexes Bearing a Chelating (Chiral) Ether Side Chain onto the Cp-Ring. Organometallics, 16, 2651 - 2658 (1997).
- M. J. Woltering, R. Fröhlich, D. Hoppe: Synthese von enantiomeren- und diastereo- merenreinen Cyclopentanolen durch asymmetrische Cyclocarbolithiierung von 5- Alkenylcarbamaten. Angew. Chem., 109, 1804 - 1805 (1997); Angew. Chem. Int. Ed., 36, 1764 - 1766 (1997).
- A. A. H. van der Zeijden, Ch. Mattheis, R. Fröhlich: The First Monofluorenyl Zirconium Trichloride. Chem. Ber./Recueil, 130, 1231 - 1234 (1997).
- M. Oberhoff, G. Erker, R. Fröhlich: Reaction of „Jordan´s Cation“ [Cp2ZrCH3(THF)+] with Amino Acid-Derived Isocyanates - A First Synthetic Route to Oligopeptide- Modified Group 4 Bent Metallocene Cation Systems. Chemistry, 3, 1521 - 1525 (1997).
- Z. Yu, R. Aumann, R. Fröhlich, K. Roths, J. Hecht: 1-Metalla-1,3,5,7-octatetraenes from (1-alkynyl)carbene complexes of chromium and tungsten via [6-(1-Alkenyl)] pyranylidene complexes. J. Organomet. Chem., 541, 187 - 198 (1997).
- G. Böttger, A. Geisler, R. Fröhlich, E.-U. Würthwein: Trifluoromethane-sulfonic Anhydride Induced Cleavage of a Bis(iminomethane) Compound: A New Access to 1,3- Diaryl-2-azaallenium Triflate and a N-((Trifluoromethyl)sulfonyl)methanimine. Synthesis, Structures, and Quantum Chemical Calculations. J. Org. Chem., 62, 6407 - 6411 (1997).
- A. A. H. van der Zeijden, Ch. Mattheis, R. Fröhlich, F. Zippel: Aqua Complexes of [(2- Methoxyethyl)cyclopentadienyl]zirconium Trichloride. Inorg. Chem., 36, 4444 - 4450 (1997).
- J. Schottek, G. Erker, R. Fröhlich: Stabilisierung eines C2v-verzerrten Methanderivats in einem Organometallgerüst. Angew. Chem., 109, 2585 -2587 (1997); Angew. Chem. Int. Ed., 36, 2475 - 2477 (1997).
- A. Steinhorst, G. Erker, M. Grehl, R. Fröhlich: Group 4 ansa-metallocene Ziegler catalysts derived from trans-1,2-cycloalkylene-bis(indenyl)- and -bis(tetrahydroindenyl) MCl2 systems: structural and reactivity studies. J. Organomet. Chem., 542, 191 - 204 (1997).
- N. C. Aust, R. Fröhlich, J. Hecht, E.-U. Würthwein: -Alkoxy- and - Amino- Substituted Oligonitriles. Liebigs Ann./Recueil, 1593 - 1602 (1997).
- R. Fröhlich, B. Hungerhoff, P. Metz: (E)-2-Buten-1-yl (S)-N-(2’-Methoxy-[1,1’] binaphthalen-2-yl)propanimidate and (E)-2-Buten-1-yl (S)-N-(2’-Methoxy-3- methyl-[1,1’]binaphthalen-2-yl)propanimidate. Acta Cryst. C, 53, 1665 - 1657 (1997).
- K. Hegemann, G. Haufe, R. Fröhlich, F. Zippel: Crystal Structures of 2,5-Disubstituted 9-Oxabicyclo[4.2.1]nonanes. Transannular O-Heterocyclization Products of Cycloocta- 1,5-diene. Acta Cryst. C, 53, 1889 - 1892 (1997).
- M. Könemann, G. Erker, R. Fröhlich, E.-U. Würthwein: Structure and Chemical Behavior of an 5-(1-Azapentadienyl)lithium Derivative Generated by Deprotonation Reactions from 9-(N-tert-Butylaminomethyl)fluorene or 6-(tert- Butylamino)dibenzofulvene. J. Am. Chem.Soc., 119, 11155 - 11164 (1997).
- J. Karl, G. Erker, R. Fröhlich: Internal Fluorocarbon Coordination as a Tool for the Protection of Active Catalytic Sites: Experimental Characterization of the Zr...F-C Interaction in the Group 4 Metallocene(butadiene)/B(C6F5)3 Betaine Ziegler Catalyst Systems. J. Am. Chem. Soc., 119, 11165 - 11173 (1997).
- S. Pietz, R. Fröhlich, G. Haufe: Microbial Oxygenation of Cycloheptyl-N-phenyl- carbamate and ()-trans-2-Fluorocycloheptyl-N-Phenyl-carbamate with Beauveria bassiana. Tetrahedron, 53, 17055 - 17066 (1997).
- B. Bosch, G. Erker, R. Fröhlich, O. Meyer: Internally Phosphine-stabilized Zirconocene Cations Employing Substituted ((Diarylphosphino)methyl)cyclopentadienyl Ligand Systems. Organometallics, 16, 5449 - 5456 (1997).
- M. F. Nielsen, B. Batanero, Th. Löhl, H. J. Schäfer, E.-U. Würthwein, R. Fröhlich: Enantioselective Cathodic Reduction of 4-Methylcoumarine; Dependence of Selectivity on Reaction Conditions and Investigation of the Mechanism. Chemistry, 3, 2011 - 2024 (1997).
- W. Spaether, M. Rump, G. Erker, R. Fröhlich, J. Hecht, C. Krüger, J. Kuhnigk: Formation and Structures of Dialkyltartrate-bridged Dinuclear Group 4 Metallocene Complexes. Anales de Quimica, Int. Ed., 93, 394 - 403 (1997).
- D. Hoppe, B. Kaiser, O. Stratmann, R. Fröhlich: Herstellung und Reaktionen einer hoch enantiomerenangereicherten, ungewöhnlich konfigurationsstabilen -Benzyl- thiolithium-verbindung. Angew. Chem., 109, 2872 - 2874 (1997); Angew. Chem. Int. Ed., 36, 2784 -2786 (1997).
- J. Karl, G. Erker, R. Fröhlich, F. Zippel, F. Bickelhaupt, M. Schreuder Goedheijt, O. S. Akkerman, P. Binger, J. Stannek: Nichtkovalente Wechselwirkungen bei Organometallverbindungen: Interne Metall-Kohlenstoff-Ionenpaarbildung bei Zirconium-Borat-Betainen. Angew. Chem., 109, 2914 - 2917 (1997); Angew. Chem. Int. Ed., 36, 2771 -2774 (1997).
- R. Aumann, K. Roths, R. Fröhlich: Dichotomy of Enamines at the CC bond of a (1- Alkynyl)carbene Tungsten Complex. (1-Azoniabutadien-4-yl)carbonylmetalates (- OC)5WC(OEt)=CR1-C(=N+R2)Me, Stable Torsion Isomers of (2-Aminoethenyl)carbene Complexes (OC)5W=C(OEt)-CR1=C(NR2)Me. Organometallics, 16, 5893 - 5899 (1997).
- A. Monsees, S. Laschat, M. Hotfilder, J. Wolff, K. Bergander, L. Terfloth, R. Fröhlich: Synthesis and In Vitro Cytotoxic Activity of Novel Hexahydro-2H-pyrido[1,2- B]isoquinolines against Human Brain Tumor Cell Lines. Bioorg. Med. Chem. Lett., 7, 2945 - 2950 (1997).
- R. Aumann, Z. Yu, R. Fröhlich: Dihydropyridinyl carbene complexes by [4+2]annu- lation of alkenyl- or aryl imines to (1-alkynyl)carbene complexes of chromium and tungsten. J. Organomet. Chem., 549, 311 - 318 (1997).
- S. Otten, R. Fröhlich, G. Haufe: Synthesis and structural characterisation of enatiopure (5R,5R)-(+)-2,5-Dimethylthiolane. Tetrahedron Asymmetry, 9, 189 – 191 (1998).
- O. Temme, S. Laschat, R. Fröhlich: Convenient Preparation of Aromatic Aldehydes via DDQ Oxidation. Apllication in the Synthesis of a Tripodand Containing Octahydroacridine Moieties. J. prakt. Chem., 340, 341 –345 (1998).
- A. Krol, R. Fröhlich, E.-U. Würthwein: First X-ray crystal structure and NMR spectroscopic analysis of a lithiated 1,2-diazapentadiene. J. Chem. Soc., Chem. Commun., 1998, 485 – 486.
- A. A. H. van der Zeijden, Ch. Mattheis, R. Fröhlich: [1,2-Bis (2-methoxyethyl-O))-5-cyclopentadienyl]trichlorozirconium(IV). Acta Cryst. C, 54, 458 – 460 (1998).
- R. Aumann, K. B. Roths, M. Kössmeier, R. Fröhlich: Stereochemistry of 4-(NH- Amino)-1-metalla-1,3-dienes (CO)5M=C(OEt)-CH=C(NHR)Ph (M=Cr, W). J. Organomet. Chem., 556, 119 –127 (1998).
- R. Aumann, I. J. Göttker-Schnetmann, B. Wibbeling, R. Fröhlich: 1-Metalla-1,3,5,7-octatetraenes by 4-Addition of (1,3-Dien-2-yl)amines to (1-Alkynyl)carbene Complexes (M=Cr,W). Tetrahedron Letters, 39, 795 – 798, (1998).
- B. Bosch, G. Erker, R. Fröhlich: The synthesis of substituted bis-[(diarylphosphinomethyl)cyclopentadienyl]zirconocene dichloride complexes for the preparation of heterodimetallic complexes containing early/late transition metal combinations. Inorg. Chem. Acta, 270, 446 – 458 (1998).
- F. Eilers, T. Bach, R. Fröhlich: 9-Methyl-8,11,12-trioxatricyclo-[7.2.1.02,7]dodeca-2,4,6-trien-10-one. Acta Cryst. C, 54, 1011 – 1013 (1998).
- H. Jacobsen, H. Berke, T. Brackemeyer, T. Eisenblätter, G. Erker, R. Fröhlich, O. Meyer, K. Bergander: Comparison of Characteristic Structural Features among the Triade of Tris(Cyclopentadienyl)(Group-4 Metal) Complex Cations: a Combined Theoretical and Experimental Study. Helv. Chim. Acta, 81, 1692 – 1709 (1998).
- A. Kraft, R. Fröhlich: Star-branched non-covalent complexes between carboxylic acids a tris(imidazoline) base. J. Chem. Soc., Chem. Commun., 1998, 1085 – 1086.
- R. Aumann, B. Hildmann, R. Fröhlich: Rearrangement of (Cyclo-butenyl)carbene Tungsten Complexes to 1-Tungsta-1,3,5-hexatrienes. Organometallics, 17, 1197 – 1201 (1998).
- O. Temme, T. Dickner, S. Laschat, R. Fröhlich, S. Kotila, K. Bergander: Synthesis of Azapolycyclic Systems Based on the Indolizino[3,4-b]quinoline Skeleton - A Diastereoselective Entry to Potential Oligodentate Artificial Receptors. Eur. J. Org. Chem., 651 – 659 (1998).
- C. Puke, G. Erker, N. C. Aust, E.-U. Würthwein, R. Fröhlich: Evidence for a Continous Transition between a Thiaphosphetane and a Betaine-Type Structure in the Thio-Wittig-Reaction. J. Am. Chem. Soc., 120, 4863 – 4864 (1998).
- L. Krüger, T. Bach, M. Drögemüller, B. Trentmann, R. Fröhlich: Isomerization and Photochemical Decomposition of -Furylacrylonitriles. J. Inf. Recording, 24, 289 – 293 (1998).
- S. Döring, G. Erker, R. Fröhlich, O. Meyer, K. Bergander: Reaction of the Lewis Acid Tris(pentafluorophenyl)borane with a Phosphorus Ylide: Competition between Adduct Formation and Electrophilic and Nucleophilic Aromatic Substitution Pathways. Organometallics, 17, 2183 – 2187 (1998).
- M. Albrecht, M. Schneider, R. Fröhlich: Self-assembly of a triple-stranded helicate from a rigid di(catechol) ligand and formation of its dimer in the solid state. New J. Chem., 753 – 754 (1998).
- R. Bextermöller, H. Redlich, K. Schnieders, S. Thormählen, R. Fröhlich: Perhydroxilierte 1,7-Dioxaspiro[5.5]undecane (“Spirozucker”): Synthese, Stereochemie und Struktur. Angew. Chem., 110, 2612 - 2616 (1998); Angew. Chem. Int. Ed., 37, 2496 - 2500 (1998).
- J. Schottek, G. Erker, R. Fröhlich: Formation of Metallocene-Stabilized Planar-Tetracoordinate Carbon Compounds by a Protonation Route. Eur. J. Inorg. Chem., 551 –558 (1998).
- M. Oestreich, R. Fröhlich, D. Hoppe: (-)-Sparteine-Mediated Stereoselective Intramolecular Carbolithiation of Alkynes. Tetrahedron Letters, 39, 1745 – 1748 (1998).
- W. Ahlers, G. Erker, R. Fröhlich: Zirconocene-(µ-Organyl)borate Betaines Derived by Treatment of a (-Alkenyl)(-alkynyl)zirconocene Complex with Tris(pentafluoro- phenyl)borane. Eur. J. Inorg. Chem., 889 – 895 (1998).
- J. Schottek, D. Röttger, G. Erker, R. Fröhlich: Formation of Hyper-coordinated Carbon inside a (µ-Hydrocarbyl)bis(group 4 metallocene) Framework by a Simple Protonation Route. J. Am. Chem. Soc., 120, 5264 – 5273 (1998).
- R. Aumann, Z. Yu, R. Fröhlich: 1-Azacycloalkene- and 2-Azabicyclo-alkene Derivatives of 4-Amino-1-metalla-1,3-dienes by Reaction of Saturated Lactims with (1- Alkynyl)carbene Complexes of Chromium and Tungsten. Organometallics, 17, 2897 – 2905 (1998).
- L. Duda, G. Erker, R. Fröhlich, F. Zippel: Formation of a Constrained-Geometry Ziegler Catalyst System Containing a C1 Instead of the Usual Si1 Connection Between the Cyclopentadienyl and Amido Ligand Components. Eur. J. Inorg. Chem., 1153 – 1162 (1998).
- W. Ahlers, G. Erker, R. Fröhlich: Reaction of (-alkynyl) Group 4 metallocene cation complexes with alkyl- and arylisocyanides. J. Organomet. Chem., 571, 83 – 89 (1998).
- W. Iwanek, R. Fröhlich, M. Urbaniak, C. Näther, J. Mattay: The Complexes of Tetramethylresorc[4]arene with Amines, Amino Alcohols and Pyridine. Tetrahedron, 54, 14031 – 14040 (1998).
- T. Dwars, U. Schmidt, C. Fischer, I. Grassert, R. Kempe, R. Fröhlich, K. Drauz, G. Oehme: Synthesis of Optically Actice -Amino-phosphonic Acids by Catalytic Asymmetric Hydrogenation in Orgnaic Solvents and Aqueous Micellar Media. Angew. Chem., 110, 3033 - 3035 (1998); Angew. Chem. Int. Ed., 37, 2851 - 2853 (1998).
- M. Woltering, R. Fröhlich, B. Wibbeling, D. Hoppe: Stereoselective Synthesis of Hydroxylated Indolizidines via (-)Sparteine-Mediated Kinetic Resolution Coupled with Intramolecular Carbolitiation. SYNLETT, 797 – 800 (1998).
- W. Guarnieri, M. Sendzik, R. Fröhlich, D. Hoppe: Regio- and Stereoselective Lithiation and C-Substitution of (S)-2-(Dibenzylamino)-butane-1,4-diol via Dicarbamates. Synthesis, 1274 – 1286 (1998).
- U. Meiners, E. Cramer, R. Fröhlich, B. Wibbeling, P. Metz: A General Route to the Monomeric Subunits of the Macrotetrolides – A Short Synthesis of Methyl Nonactate. Eur. J. Org. Chem., 2073 – 2078 (1998).
- W. Spaether, K. Klaß, G. Erker, F. Zippel, R. Fröhlich: Formation of Group 4 Metallocene-Enolate . B(C6F5)3 Adducts and Their Role as Initiators in the Rapid Polymerization of the Functionalized Olefin Methyl vinyl ketone. Chemistry, 4, 1411 – 1417 (1998).
- W. Iwanek, R. Fröhlich: Structural Investigations of the Complex of Calixresorcarene with Pyridine. Polish J. Chem., 72, 2342 – 2345 (1998).
- H. C. Strauch, G. Erker, R. Fröhlich: Synthesis of (s-trans-4-Butadiene)tantalocene Cation and Its CC-Coupling Reactions with Ketones, Nitriles, and Alkynes. Organometallics, 17, 5746 – 5757 (1998).
- K. Behrens, R. Fröhlich, O. Meyer, D. Hoppe: Enantioselective Lithiation and Substitution of (E)-Cinnamyl N,N-Diisopropylcarbamate via (-)-Sparteine Complexes. Eur. J. Org. Chem., 2397 – 2403 (1998).
- R. Aumann, Z. Yu, R. Fröhlich, and F. Zippel, Organic Syntheses via ransition Metal Complexes, 97: "Mesoionic Pyrrolium Complexes and Dihydropyrroles by Cycloaddition of Enolizable Imines to an [(1-Alkynyl)carbene]tungsten Complex.“ Eur. J. Inorg. Chem., 1623-1629 (1998).
- K. Klaß, L. Duda, N. Kleigrewe, G. Erker, R. Fröhlich, E. Wegelius: Formation and Structures of [1,2-Bis(N-tert-butylcarbamoyl)-cyclopentadienyl]zirconium Complexes – Coordination Chemistry of a “Fulvenologos” Malonic Amide Anion Ligand System. Eur. J. Inorg. Chem., 11 – 19 (1999).
- M. Albrecht, O. Blau, R. Fröhlich: An Expansible Metalla-cryptand as a Component of a Supramolecular Combinatorial Library Formed from Di(8-hydroxyquinoline) Ligands and Gallium(III) or Zinc(II) Ions. Chem. Europ. J., 5, 48 – 56 (1999).
- A. Bertuleit, M. Könemann, L. Duda, G. Erker, R. Fröhlich: Developing a fulvene route to C1-bridged “constrained geometry” Ziegler catalyst systems. Topics in Catalysis, 7, 37 – 44 (1999).
- M. Dahlmann, G. Erker, M. Nissinen, R. Fröhlich: Direct Experimental Observation of the Stereochemistry of the First Propene Insertion Step at an Active Homogeneous Single-Component Metallocene Ziegler Catalyst. J. Am. Chem. Soc., 121, 2820 – 2828 (1999).
- S. Otten, R. Fröhlich, G. Haufe: Synthesis and Structural Characterization of Enantiopure Camphor-Based Di-, Tri- and Tetrasulfides. Heterocycles, 51, 505 – 509 (1999).
- U. Blaschke, G. Erker, M. Nissinen, E. Wegelius, R. Fröhlich: Metallaoxirane-Supported Hydrido Group 4 Metallocene Cations. Organometallics, 18, 1224 – 1234 (1999).
- R. Aumann, R. Fröhlich, J. Prigge, O. Meyer: Cyclopentadiene Annelation to Enolizable Cyclic Ketones via (1-Alkynyl)carbene Complexes (M = Cr, W). Organometallics, 18, 1369 – 1380 (1999).
- H. Jacobsen, H. Berke, S. Döring, G. Kehr, G. Erker, R. Fröhlich, O. Meyer: Lewis Acid Properties of Tris(pentafluorophenyl)borane. Structure and Bonding in L-B(C6F5)3 Complexes. Organometallics, 18, 1724 – 1735 (1999).
- U. Blaschke, F. Menges, G. Erker, R. Fröhlich: Syntheses and Insertion Reactions of (2-Aldehyde)zirconocene-Supported (Hydrdo)zirconocene Cation Sytems. Europ. J. Inorg. Chem., 621 – 632 (1999).
- W. Ahlers, G. Erker, R. Fröhlich, U. Peuchert: Coupling of -acetylide ligands at Group 4 metallocene complexes to yield methylenecyclo-propene-type frameworks. J. Organomet. Chem., 578, 115 –224 (1999).
- H. Graalfs, R. Fröhlich, C. Wolff, J. Mattay: Diastereoselective Addition of Radicals to 1,3-Dioxin-4-ones. Europ. J. Org. Chem., 1057 – 1073 (1999).
- J. van Bebber, H. Ahrens, R. Fröhlich, D. Hoppe: Efficient Desymmetrization of meso-cis-1,2-Cyclohexanedimethanol with Differentiation between Diastereotopic and Enantiotopic C-H Bonds by (-)-Sparteine-Mediated Deprotonation. Chem. Eur. J., 6, 1905 – 1916 (1999).
- J. Wonnemann, M. Oberhoff, G. Erker, R. Fröhlich, K. Bergander: Group-4 Metallocene Cation Complexes of Oligopeptides: Reaction of [Cp2ZrCH3(THF)+BPh4-] with Boc-Protected Di- and Tripeptide Esters. Europ. J. Inorg. Chem., 1111 – 1120 (1999).
- S. Knüppel, G. Erker, R. Fröhlich: Transformations at a Group 4 Bent Metallocene Framework: The Formation of a Rigid ansa-Metallocene by Mannich-type Carbon-Carbon Coupling. Angew. Chem., 111, 2048 - 2051 (1999); Angew. Chem. Int. Ed., 38, 1923 - 1926 (1999).
- C. Stammel, R. Fröhlich, C. Wolff, H. Wenck, A. de Meijere, J. Mattay: Synthesis, X-Ray Analysis of New [5]Helicens - HMO Calculations on the Photocyclization of the Stilbene Precursors. Eur. J. Org. Chem., 1709 – 1718 (1999).
- C. Puke, G. Erker, B. Wibbeling, R. Fröhlich: Structural and Spectroscopic Evidence of the Occurence of gauche-Betaine Intermediates in the Thio-Wittig Reaction. Europ. J. Org. Chem., 1831 – 1841 (1999).
- A. Kraft, F. Osterod, R. Fröhlich: Bidirectional Association of Branched Noncovalent Complexes of Tetrazoles and 1,3,5-Tris(4,5-dihydroimidazol-2-yl)benzene in Solution. J. Org. Chem, 64, 6425 – 6433 (1999)
- M. Albrecht, C. Riether, R. Fröhlich: Platinum(II) Chloride Complexes of Linear Alkyl-bridged 2,2’-Bipyridine/Catechol Ligands. Z. Anorg. Allg. Chem., 625, 1343 – 1348 (1999).
- H. C. Strauch, G. Erker, R. Fröhlich, M. Nissinen: Formation of the [(s-trans-4-Butadiene)TaCp*Cp]+ Cation and Its Reaction with Organic Carbonyl Derivatives. Eur. J. Inorg. Chem., 1453 – 1459 (1999).
- H. C. Strauch, R. Roesmann, S. Pacheiner, G. Erker, R. Fröhlich, B. Wibbeling: The reaction of (butadiene)tantalocene cation with bulky carbonyl derivatives. J. Organomet. Chem., 584, 318 – 322 (1999).
- H. C. Strauch, K. Bergander, G. Kehr, R. Fröhlich, G. Erker: Group 5 Metal Complexes with Cyclooctatetraene: Formation and Characterization of (Butadiene) (Cyclooctatetraene) (cyclopentadienyl)tantalum Systems. Europ. J. Inorg. Chem., 1461 – 1466 (1999).
- J. Pflug, R. Fröhlich, G. Erker: Unexpected alkyl-substituent exchange during the formation of a cationic bis(zirconocene) complex that contains a planar four-coordinate carbon atom. J. Chem. Soc., Dalton Trans., 2551 – 2555 (1999).
- J. Schwerdtfeger, S. Kolczewski, B. Weber, R. Fröhlich, D. Hoppe: Stereoselective Deprotonation of Chiral and Achiral 2-Aminoalkyl Carbamates: Synthesis of Optically Active -Amino Alcohols via 1-Oxy-Substituted Alkyllithium Intermediates. Synthesis, 1573 – 1592 (1999).
- B. Weber, S. Kolczewski, R. Fröhlich, D. Hoppe: Facile and Highly Stereoselective Synthesis of the C2-Symmetrical Diamino Diol Core-Unit of HIV-1 Protease Inhibitors and of Their Symmetrical and Unsymmetrical Analogues from Lithiated 2-(Dibenzylamino)alkyl Carbamates: Oxidative Dimerisation. Synthesis, 1593 – 1606 (1999).
- T. Gerkensmeier, W. Iwanek, C. Agena, R. Fröhlich, S. Kotila, C. Näther, J. Mattay: Self-Assembly of 2,8,14,20-Tetraisobutyl-5,11,17,23-tetrahydroxyresorc[4]arene. Eur. J. Org. Chem., 2257 – 2262 (1999).
- J. Ratilainen, K. Airola, R. Fröhlich, M. Nieger, K. Rissanen: Synthesis of a tetradentate piperazine ligand and a structural study of its coordination compounds. Polyhedron, 18, 2265 – 2273 (1999).
- S. Knüppel, R. Fröhlich, G. Erker: Formation of functionalized [3]ferrocenophane derivatives by an enamine condensation reaction. J. Organomet. Chem., 586, 218 – 222 (1999).
- H. C. Strauch, B. Wibbeling, R. Fröhlich, G. Erker, H. Jacobsen, H. Berke: Reactions of (Butadiene)tantalocene Cation with Alkyl Isocyanides. Organometallics, 18, 3802 – 3812 (1999).
- J. Pflug, A. Bertuleit, G. Kehr, R. Fröhlich, G. Erker: Evidence for -Nitrogen Paricipation in the Internal C-H Activation Reaction at ((Dimethylamino)methyl) cyclopentadienyl-Derived Methylzirconocene Cations. Organometallics, 18, 3818 – 3826 (1999).
- M. Albrecht, O. Blau, K. Witt, E. Wegelius, M. Nissinen, K. Rissanen, R. Fröhlich: Di(8-hydroxyquinoline)Derivates for Supramolecular Chemistry: Syntheses and Solid State Superstructures. Synthesis, 1819 – 1829 (1999).
- R. Aumann, I. Göttker-Schnetmann, R. Fröhlich, O. Meyer: Vinyl- and Divinylcyclopentadienes by Rhodium-Catalyzed Condensation of Alkynes with Cross-Conjugated Amino Metallahexatrienes [= 1-Amino-1,3-butadien-2-yl)carbene Complexes] (M = Cr, W). Eur. J. Inorg. Chem., 2545 – 2561 (1999).
- M. Dahlmann, G. Erker, R. Fröhlich, O. Meyer: Structural Characterization of an (s-trans-4-Butadiene) Group 4 ansa-Metallocene Complex. Organometallics, 18, 4459 – 4461 (1999).
- D. Vagedes, R. Fröhlich, G. Erker: Treatment of Naphthols with B(C6F5)3: Formation and Characterization of the Lewis Acid Adducts of Their Keto Isomers. Angew. Chem., 111, 3561 – 3565 (1999); Angew. Chem. Int. Ed., 38, 3362 - 3365 (1999).
- C. Reufer, C. Zielinski, H. J. Schäfer, R. Fröhlich: Diastereoselective Cathodic Reduction of Phenylglyoxylic Acid Attached to Chiral Auxiliaries. Acta Chem. Scand., 53, 1023 – 1037 (1999).
- D. Hoppe, M. J. Woltering, M. Oestreich, R. Fröhlich: (-)-Sparteine-Mediated Asymmetric Intramolecular Carbolithiation of Alkenes: Synthesis of Enantiopure Cyclopentanes with Three Consecutive Stereogenic Centers. Helv. Chim. Acta, 82, 1860 – 1877 (1999).
- B. Weber, J. Schwerdtfeger, R. Fröhlich, A. Göhrt, D. Hoppe: Diastereoselective Lithiation and Substitution of (S)-N-Benzylprolinol and rac-N-Benzylpiperidine-2-methanol via the Carbamate Esters: Kinetic Resolution by Means of (-)-Sparteine-mediated Deprotonation. Synthesis, 1915 – 1924 (1999)
- U. Blaschke, G. Erker, R. Fröhlich, O. Meyer: Borane Insertion into Group-4 Metal-to Carbon Bonds: The Reaction of the HB(C6F5)2 with (2-Formaldehyde)zirconocene Dimer and with (Butadiene)zirconocene. Eur. J. Inorg. Chem., 2243 – 2247 (1999).
- F. Marr, R. Fröhlich, D. Hoppe: A Highly Enantioenriched, Configurationally Stable -Thioallyllithium Compound and the Stereochemical Course of Its Electrophilic Alkylation. Org. Letters, 1, 2081 – 2083 (1999).
- M. Oestreich, R. Fröhlich, D. Hoppe: (-)-Sparteine-Mediated Stereoselective Intramolecular Carbolithiation of 4-Substituted 5-Hexynyl Carbamates. Synthesis of Enantiopure 1,3-Difunctionalized Alkylidene Cyclopentanes. J. Org. Chem., 64, 8616 – 8626 (1999).
- K. Klaß, R. Fröhlich, G. Erker: Formation and structural properties of 1,1’,2,2’-tetra(tert-butylcarbamoyl)ferrocene und –ruthenocene Derivatives. J. Chem. Soc., Dalton Trans., 4457 – 4461 (1999).
- G. Erker, R. Hock, S. Wilker, C. Laurent, C. Puke, E.-U. Würthwein, N. Aust, R. Fröhlich: New Aspects of the Thio-Wittig-Reaction. Phosphorus, Sulfur and Silicon, 153-154, 79 –97 (1999).
- H. C. Strauch, T. Rinderknecht, G. Erker, R. Fröhlich, E. Wegelius, F. Zippel, S. Höppener, H. Fuchs, L. Chi: Substituent-Dependent Formation of Supramolecular Aggregates of 6-Hydroxy-trans-hexenoic Acids in the Solid State. Eur. J. Org. Chem., 187 – 192 (2000).
- H. C. Strauch, G. Erker, R. Fröhlich: Reaction of phenylacetylene with (butadiene)tantalocene cation. J. Organomet. Chem., 593 – 594, 388 – 391 (2000).
- G. Kehr, R. Fröhlich, B. Wibbeling, G. Erker: (N-Pyrrolyl)B(C6F5)2 – A New Organo-metallic Lewis Acid for the Generation of Group 4 Metallocene Cation Complexes. Chem. Eur. J., 6, 258 – 266 (2000).
- F. E. Hahn, L. Wittenbecher, D. Le Van, R. Fröhlich: Nachweis des Gleichgewichts zwischen einem N-heterocyclischen Carben und seinem Dimer in Lösung. Angew. Chem., 112, 551 – 554 (2000); Angew. Chem. Int. Ed., 39, 541 - 544 (2000).
- B. Plietker, D. Seng, R. Fröhlich, P. Metz: High Pressure Intermolecular Diels-Alder Reactions of Vinylsulfonates and Vinylsulfonamides. Tetrahedron, 56, 873 – 879 (2000).
- D. Kunz, G. Erker, R. Fröhlich, G. Kehr: Reactions of Functional Groups at the Peri-phery of Group 4 Metallocene Frameworks: Selective Formation of a Cp-Bonded Azaboretidine Derivative by a Hydroboration Route. Eur. J. Inorg. Chem., 409 – 416 (2000).
- T. H. Warren, G. Erker, R. Fröhlich, B. Wibbeling: 1,3-Doubly Bridged Group 4 Metallocenes by Intramolecular Reductive Coupling of Pendent Olefins. Organometallics, 19, 127 –134 (2000).
- H. Bernsmann, B. Hungerhoff, R. Fechner, R. Fröhlich, P. Metz: Towards the synthesis of pamamycin-607. Tetrahedron Letters, 41, 1721 - 1724 (2000).
- G. F. Pauli, R. Fröhlich: Chiral Key Positions in Uzara Steroids. Phytochem. Anal., 11, 79 – 89 (2000).
- H.-P. Wu, R. Aumann, R. Fröhlich, B. Wibbeling: 1,3-Dioxycyclopentadienes from (1-Alkynyl)carbene Tungsten Complexes – Domino Cyclization/Cycloaddition Reactions. Eur. J. Org. Chem., 1183 – 1192 (2000).
- O. Safarowsky, M. Nieger, R. Fröhlich, F. Vögtle: Ein molekularer Knoten mit zwölf Amidgruppen – Einstufensynthese, Kristallstruktur, Chiralität. Angew. Chem., 112, 1699 – 1701 (2000); Angew. Chem. Int. Ed., 39, 1616 - 1618 (2000).
- B. E. Bosch, I. Brümmer, K. Kunz, G. Erker, R. Fröhlich, S. Kotila: Structural Charac-terization of Heterodimetallic Zr/Pd and Zr/Rh Catalyst Precursors Containing the C5H4PPh2 Ligand. Organometallics, 19, 1255 –1261 (2000).
- S. Knüppel, J.-L. Fauré, G. Erker, G. Kehr, M. Nissinen, R. Fröhlich: Probing the Dynamic Features of Bis(aminocyclopentadienyl) and Bis(aminoindenyl) Zirconium Complexes. Organometallics, 19, 1262 –1268 (2000).
- J. Strauch, T. H. Warren, G. Erker, R. Fröhlich, P. Saarenketo: Formation and structural properties of salicylaldiminato complexes of zirconium and titanium. Inorg. Chim. Acta, 300 – 302, 810 –821 (2000).
- A.-K. Duhme-Klair, G. Vollmer, C. Mars, R. Fröhlich: Stereoselektive Bildung eines cyclischen dreikernigen cis-Dioxomolybdän(VI)-Komplexes aus einem chiralen Siderophor-Analogon. Angew. Chem., 112, 1683 - 1686 (2000); Angew. Chem. Int. Ed., 39, 1626 - 1628 (2000).
- G. M. Böttger, R. Fröhlich, E.-U. Würthwein: Electrophilic Reactivity of a 2-Aza-allenium and of a 2-Azaallylium Ion. Eur. J. Org. Chem., 1589 – 1593 (2000).
- H.-P. Wu, R. Aumann, R. Fröhlich, E. Wegelius, P. Saarenketo: Cyclopentadienyl Thioacylates from (1-Alkynyl)carbene Complexes (M = Cr, W): Sulfur-Centered Fragmentation of Ligand Side Chains. Organometallics, 19, 2373 – 2381, 4004 (2000).
- M. Tamm, T. Bannenberg, K. Baum, R. Fröhlich, T. Steiner, T. Meyer-Friedrichsen, J. Heck: First Hyperpolarizabilities of Manganese(I)-Chromium(0) Sesquifulvalene Complexes. Eur. J. Inorg. Chem., 1161 – 1169 (2000).
- V. N. Kovtonyuk, L. S. Kobrina, Y. V. Gatilov, I. Y. Bagryanskaya, R. Fröhlich, G. Haufe: Reactions of polyfluorinated cyclohexadienones with diazoalkanes. Part 1. Formation of cyclopropanes from polyfluorinated cyclohexa-2,4-dienones with diazomethane and phenyldiazomethane. J. Chem. Soc., Perkins Trans. 1, 1929 – 1933 (2000).
- H. Jacobsen, T. Brackemeyer, H. Berke, G. Erker, R. Fröhlich: Coordination Chemistry of {[Zr]-Cl-[Zr]}+ Complexes. Eur. J. Inorg. Chem., 1423 – 1428 (2000).
- M. Dahlmann, J. Schottek, R. Fröhlich, D. Kunz, M. Nissinen, G. Erker, G. Fink, R. Kleinschmidt: Structural Chraracterization of M(s-cis-η4-C4H6)(Me4C5SiMe2NR) (M = Ti or Zr, R = CMe3 or CHCMe(1-C10H7). J. Chem. Soc., Dalton Trans., 1881 –1886 (2000).
- A. Deiters, R. Fröhlich, D. Hoppe: Enantioselektive Synthese von funktionalisierten 1,5-Cyclononadienen durch intramolekulare Cycloalkylierung unter α,α’-Diallyl-kupplung. Angew. Chem., 112, 2189 – 2192 (2000); Angew. Chem. Int. Ed., 39, 2105 - 2107 (2000).
- M. Niehues, G. Erker, O. Meyer, R. Fröhlich: Preparation of the Metallocene Oxide Cluster Compound [Cp2Zr)3(μ2-OH)3(μ3-O)+]BPh4- by Hydrolysis of Jordan’s Cation [Cp2ZrCH3(THF)+]BPh4-. Organometallics, 19, 2813 – 2815 (2000).
- H. Bernsmann, R. Fröhlich, P. Metz: A sultone approach to the C(1)-C(18) moiety of pamamycin-607. Tetrahedron Letters, 41, 4347 – 4351 (2000).
- S. R. Waldvogel, R. Fröhlich, C. A. Schalley: Erster künstlicher Koffeinrezeptor – ein neues Konzept zur Komplexierung alkylierter Oxopurine. Angew. Chem., 112, 2580 – 2583 (2000); Angew. Chem. Int. Ed., 39, 2472 - 2475 (2000).
- R. Aumann, M. Kößmeier, K. Roths, R. Fröhlich: Pyrylium Carbonylmetalates and Related Compounds Derived from (1-Alkynyl)carbene Complexes (M = Cr, W). Tetrahedron, 56, 4935 – 4949 (2000).
- S. Venne-Dunker, W. Ahlers, G. Erker, R. Fröhlich: Cyclopropenylium-Borate Betaines: Opening an Organometallic Route to Neutral Carbocation-Like Compounds. Eur. J. Inorg. Chem., 1671 – 1678 (2000).
- J. K. Eberhardt, R. Fröhlich, S. Venne-Dunker, E.-U. Würthwein: 1:1- and 2:1-Copper(II) Complexes from Primary N-Acylamidines. Eur. J. Inorg. Chem., 1739 – 1743 (2000).
- M. Dahlmann, R. Fröhlich, G. Erker: Reaction of a Zirconocene (Butadiene)borate-Betaine Single-Component Ziegler Catalyst with Trimethylphospane. Eur. J. Inorg. Chem., 1789 – 1793 (2000).
- J. Pflug, G. Erker, G. Kehr, R. Fröhlich: Addition and Coupling Reactions of Zirconocene Cation Complexes that Contain a Pendant η2-Formaldiminium Side Chain. Eur. J. Inorg. Chem., 1795 – 1801 (2000).
- C. Ochs, F. E. Hahn, R. Fröhlich: An Unsymmetrical Tripodal Ligand with an N2OS Donor Set: Coordination Chemistry with Nickel(II) Ions and Aerial Oxidation to the Sulfinate Complex. Chem. Eur. J., 6, 2193 – 2199 (2000).
- F. E. Hahn, L. Wittenbecher, D. Le Van, R. Fröhlich, B. Wibbeling: Neuartige 1,2,4-Triphosphol- und 1,2,3-Triphospheten-Derivate aus N,N’-Bis(2,2,dimethylpropyl)-benzimidazolin-2-yliden und Phosphaalkinen. Angew. Chem., 112, 2392 – 2396 (2000); Angew. Chem. Int. Ed., 39, 2307 - 2310 (2000).
- M. Dahlmann, G. Erker, R. Fröhlich, O. Meyer: Structural Dichotomy in Single Component Ziegler Catalyst Systems: Characterization of Zr...F and Zr...C Bonded Structural Types of Group 4 Metallocene [C4H6-B(C6F5)3] Betaines. Organometallics, 19, 2956 –2967 (2000).
- A. Deiters, C. Mück-Lichtenfeld, R. Fröhlich, D. Hoppe: Asymmetric Synthesis of a (2Z,7E)-Cyclononadiene by an Intramolecular Cycloalkylation and Insight to Its Conformational Properties. Org. Lett., 2, 2415 – 2418 (2000).
- A. Kreier, R. Fröhlich, E. Wegelius, D. Hoppe: Asymmetric Synthesis of Stereodefined 7-(Alk-1-enyl)-5,6,7,8-tetrahydronaphthalene-2-carboxylic Acids and Their Precursors, Bearing a Polar Group in the 8-Position, by the 3-Sulfonyl-1,3-oxazolidine Method. Synthesis, 1391 – 1403 (2000).
- O. Meyer, R. Fröhlich, G. Haufe: Asymmetric Cyclopropanation of Vinyl Fluorides: Access to Enantiopure Monofluorinated Cyclopropane Carboxylates. Eur. J. Inorg. Chem., 535-538 (2001).
- L. Rems, R. Fröhlich, B. Unterhalt: Racematspaltung mit MBF-Lactol als Schutzgruppe – Auffinden eines “modifizierten” MBF-Lactols - Pharmazie, 55, 584 – 586 (2000).
- M. Tamm, B. Dreßel, R. Fröhlich, K. Bergander: Complexes containing the heptadentate cogwheel C7Me7: synthesis and structural characterization of heptamethylcycloheptatrienyl (CHT*) tungsten complexes. Chem. Commun., 1731 – 1732 (2000).
- M. Tamm, B. Dreßel, R. Fröhlich: Molecular Structure of a Heptadentate Cogwheel: C7Me7+ Is Not Planar. J. Org. Chem., 65, 6795 – 6797 (2000).
- O. Stratmann, D. Hoppe, R. Fröhlich: Synthesis and Structure of Highly Enantio- and Diastereoenriched 1-Aza-4-oxa-7-thiabicyclo[3.3.0]octan-8-ones Derived from Acyl-Substituted S-Benzyl Thiocarbamates. J. Prakt. Chem., 342, 828 – 831 (2000).
- T. Dreier, G. Erker, R. Fröhlich, B. Wibbeling: 2-Hetaryl-Substituted Bis(indenyl)zirconium Complexes as Catalyst Precursors for Elastomeric Polypropylene Formation. Organometallics, 19, 4095 – 4103 (2000).
- K. Kunz, J. Pflug, A. Bertuleit, R. Fröhlich, E. Wegelius, G. Erker, E.-U. Würthwein: Oligomeric Chain Structures of Substituted (Dialkyaminomethyl) cyclopentadienyllithium Compounds: Structural Variations Characterized by Different Involvement of the Internal Amino Donor Ligands in the Solid State. Organometallics, 19, 4208 – 4216 (2000).
- D. K. Heimbach, R. Fröhlich, B. Wibbeling, D. Hoppe: Asymmetric Lithiation of an Allyl Carbamate Induced by a Complexing Remote Chiral Substituent. Synlett, 950 – 954 (2000).
- R. Fröhlich, G. F. Pauli: α-Onocerin chloroform hemisolvate. Acta Cryst. C56, 1476 – 1477 (2000).
- J.-L. Fauré, G. Erker, R. Fröhlich, K. Bergander: 2-[Ethyl-(2-methallyl)amino] indenyllithium: Structural Characterization of a Base-Free Oligomeric Supersandwich Indenyllithium Compound. Eur. J. Inorg. Chem., 2603 – 2606 (2000).
- P. Becker, R. Fröhlich: Crystal structure of trisodium gallium borate, Na3GaB4O9, a new anhydrous borate structure type. Z. Kristallogr. NCS, 216, 31 – 32 (2001).
- H.-P. Wu, R. Aumann, R. Fröhlich, P. Saarenketo: “Dimers” and “Trimers” of Tetrahydroindenes and Hexahydroazulenes, Respectively Generated from [2-(1- Cycloalkenyl)ethynyl]carbene Complexes (M = Cr, W) by Cascade Cyclization/Cycloaddition Reactions. Chem. Eur. J., 7, 700 – 710 (2001).
- R. Aumann, I. Göttker-Schnetmann, R. Fröhlich, P. Saarenketo, C. Holst: Enaminone Substituents Attached to Cyclopentadienes: 3E/3Z Stereochemistry of 1-Metalla-1,3,5- hexatriene Intermediates (M = Cr, W) as a Functional Criterion for the Formation of Cyclopentadienes and Six-Membered Heterocycles, Respectively. Chem. Eur. J., 7, 711 – 720 (2001).
- O. Maier, R. Fröhlich, E.-U. Würthwein: Polydonor-Substituted 1-Oxa- and 1-Thia-3,5- diazahexatrienes: Synthesis, Structures, Ring-Chain Tautomerism and Theoretical Calculations. Eur. J. Org. Chem., 83 – 92 (2001).
- O. Stratmann, B. Kaiser, R. Fröhlich, O. Meyer, D. Hoppe: Configurational Stability of an Enantioenriched α-Thiobenzyllithium Derivative and Stereochemical Course of Its Electrophilic Substitution Reactions. Synthesis of Enantiomerically Pure Tertiary Benzylic Thiols. Chem. Eur. J., 7, 423 – 435 (2001).
- G. Kehr, R. Roesmann, R. Fröhlich, C. Holst, G. Erker: Protonation of the Heterocyclic Cp-Anion Equivalent [Pyrrolyl-B(C6F5)3]Li – Formation of a Useful Neutral Brønsted Acid for the Generation of Homogeneous Metallocene Ziegler Catalysts. Eur. J. Inorg. Chem., 535 - 538 (2001).
- R. Aumann, K. Roths, R. Fröhlich: Rearrangment of carbiminium carbonylmetalates by mutual exchange of alkoxy- and amino functionalities (M = W, Cr). ). J. Organomet. Chem., 617-618, 322 – 328 (2001).
- F. E. Hahn, L. Wittenbecher, M. Kühn, T. Lügger, R. Fröhlich: A zwitterionic carbene- stannylene adduct via cleavage of a dibenzotetraazafulvene by a stannylene. J. Organomet. Chem., 617-618, 629 – 634 (2001).
- M. Tamm, T. Bannenberg, A. Grzegorzewski, R. Fröhlich: 2-Azaallenylidene complexes: syntheses and structures of chromium and tungsten complexes with a (cyclopropenylidene)-2-azaethenylidene ligand. J. Organomet. Chem., 617-618, 640 – 646 (2001).
- M. Abrecht, M. Napp, M. Schneider, P.Weis, R. Fröhlich: Kinetic versus thermo- dynamic control of the self-assembly of isomeric double-stranded dinuclear titanium(IV) complexes from a phenylalanine-bridged dicatechol ligand. Chem. Commun., 409 – 410 (2001).
- K. Kunz, G. Erker, G. Kehr, R. Fröhlich: Synthesis and Structural and Chemical Features of Formimidoyl-Functionalized Lithium Cyclopentadienides. Organometallics, 20, 392 – 400 (2001).
- D. Kunz, R. Fröhlich, G. Erker: Preparation and Structural Features of Lithium Cyclopentadienides that Contain Amino Acid-Derived Cp-Substituents. Organometallics, 20, 572 – 574 (2001).
- M. Tamm, T. Bannenberg, B. Dressel, R. Fröhlich, D. Kunz: Molybdenum Complexes of Sterically Demanding Cycloheptatrienyl Ligands. Organometallics, 20, 900 – 904 (2001).
- M. Tamm, K. Baum, R. Fröhlich, P. Saarenketo: Synthesis and Reactivity of Doubly Bridged μ-η5:η7-Cyclopentadienylcycloheptatrienyl Dimolybdenum Complexes. Organometallics, 20, 1376 – 1386 (2001).
- H. Laqua, R. Fröhlich, B. Wibbeling, D. Hoppe: Synthesis of enantioenriched indene- derived bicyclic alcohols and tricyclic cyclopropanes via (-)-sparteine-mediated lithiation of a racemic precursor and kinetic resolution during the cyclocarbolithiation. J. Organomet. Chem., 621, 96 – 104 (2001).
- T. Dreier, G. Unger, G. Erker, B. Wibbeling, R. Fröhlich: Group 4 metallocenes containing substituents at their π-ligands: synthesis and characterization of the parent bis[2-(2-furyl)indenyl]zirconocene system. J. Organomet. Chem., 622, 143 – 148 (2001).
- C. Held, R. Fröhlich, P. Metz: Enantioselektive Synthese des Ricciocarpine A und B. Angew. Chem., 113, 1091 – 1093 (2001); Angew. Chem. Int. Ed., 40, 1058 - 1060 (2001).
- N. B. Singh., A. Srivastava, R. Fröhlich: Single crystal formation by solid state reaction between 8-hydroxychinoline and 2,4,5-trichlorophenol. J. Chem. Soc., Perkin Trans. 2, 838 – 842 (2001).
- N. Kleigrewe. T. Brackemeyer, G. Kehr, R. Fröhlich, G. Erker: Synthesis and Structural Behavior of the Tris(-cyclopentadienyl)zirconium – Betaine Complex Cp2[5-C5H4B(C6F5)3]Zr. Organometallics, 20, 1952 – 1955 (2001).
- L. Peters, R. Fröhlich, A. S. F. Boyd, A. Kraft: Noncovalent Interactions between Tetrazole and an N,N’-Diethyl-Substituted Benzamidine. J. Org. Chem., 66, 3291- 3298 (2001).
- C. Schultz-Fademrecht, B. Wibbeling, R. Fröhlich, D. Hoppe: Synthesis of Enantiomerically Enriched Allenes by (-)-Sparteine-Mediated Lithiation of Alkynyl Carbamates. Org. Letters, 3, 1221-1224 (2001).
- T. Dreier, R. Fröhlich, G. Erker: Preparation and structural features of 1-(2-pyridyl)- and 1-(2-furyl)indenyl-zirconium complexes. J. Organomet. Chem., 621, 197 – 206 (2001).
- H.-P. Wu, R. Aumann, R. Fröhlich, E. Wegelius: A Convenient Regio- and Stereoselective Approach to the Angular Allylation of Bicyclic Cyclopentadienes Generated by the (1-Alkynyl)carbene Complex Route. Organometallics, 20, 2183 – 2190 (2001).
- I. Göttker-Schnetmann, R. Aumann, O. Kataeva, C. Holst, R. Fröhlich: Spiro-Fused Cyclopentadienes and Novel Pyridinium Carbonyltungstates from (1-Alkynyl)carbene Tungsten Complexes and exo-Methylene N-Heterocycles. Competition between 1,4- Addition, 1,2-Addition, and Metathesis. Organometallics, 20, 2889 – 2904 (2001).
- A. Reichert, R. Fröhlich, R. Ferguson, A. Kraft: Binding Interactions between 3-aryl- 1,2,4-oxadiazol-5-ones and a trisimidazoline base. J. Chem. Soc., Perkin Trans. 1, 1321 – 1328 (2001).
- D. Alickmann, R. Fröhlich, E.-U. Würthwein: Base-Induced Heterochiral Dimerization of an Oxiranyl Carbaldimine: Stereoselective Synthesis of a Highly Functionalized Aziridine. Org. Letters, 3, 1527-1530 (2001).
- K. Kunz, G. Erker, St. Döring, R. Fröhlich, G. Kehr: Generation of Homogeneous (sp3- C1)-Bridged Cp/Amido and Cp/Phosphido Group 4 Metal Ziegler-Natta Catalyst Systems. J. Am. Chem. Soc., 123, 6181 – 6182 (2001).
- M.Albrecht, K. Witt, H. Röttele, R. Fröhlich: Stereoselective formation of a trinuclear hexa-stranded helicate-type zinc(II) complex. Chem. Commun., 1330 – 1331 (2001).
- M. Plitzner, U. Heinl, R. Mattes, R. Fröhlich: Struktur eines Blei(II)-Komplexes mit verknüpften Monothioquadratationen als Liganden. Z. Anorg. Allgem. Chem., 627, 1426 – 1428 (2001).
- T. Jödicke, F. Menges, G. Kehr, G. Erker, U. Höweler, R. Fröhlich: Conformational Features of Group-4 ansa-Metallocenes with Long –(CH2)n-Chains Connecting Their Cyclopentadienyl Ligands. Eur. J. Inorg. Chem., 2097 - 2106 (2001).
- P. Vossmann, K. Hornig, R. Fröhlich, E.-U. Würthwein: Asymmetric Addition of Aldehydes and Ketones to Chiral 2-Azapentadienyl Lithium Compounds: Diastereo- selective Synthesis of 4-Vinyl-4,5-dihydro-oxazoles. Synthesis, 1415 – 1426 (2001).
- H. Bernsmann, M. Gruner, R. Fröhlich, P. Metz: A shortcut to the smaller fragment of pamamycin-607. Tetrahedron Lett., 42, 5337 – 5390 (2001).
- M. Albrecht, M. Napp, M. Schneider, P. Weis, R. Fröhlich: Dinuclear Titanium(IV) Complexes from Amino Acid Bridged Dicatechol Ligands: Foramtion, Structure, and Conformational Analysis. Chem. Eur. J., 7, 3966 – 3975 (2001).
- C. Ochs, F. E. Hahn, R. Fröhlich: Coordination Chemistry of Unsymmetrical Tripodal Ligands with NNO2 Donor Set. Eur. J. Inorg. Chem., 2427 - 2436 (2001).
- F.E. Hahn, D. Le Van, M. C. Moyes, T. von Fehren, R. Fröhlich, E.-U. Würthwein: Ungewöhnliche Boldung eines Azaphospholens aus 1,3,4,5-Tetramethylimidazol-2- yliden und Diisopropylaminophosphaethin. Angew. Chem., 113, 3241 – 3244 (2001); Angew. Chem. Int. Ed., 40, 3144 – 3148 (20001).
- D. Kunz, R. Fröhlich, G. Erker: Structural Features of Primary 6-Aminopentafulvenes and Some of Their Derivatives. Eur. J. Org. Chem., 3531 - 3536 (2001).
- B. Plietker, D. Seng, R. Fröhlich, P. Metz: Synthesis of Highly Substituted Methylene- cyclohexenes Using New Domino Reactions with Sultones. Eur. J. Org. Chem., 3669 - 3676 (2001).
- S. Kratschmer, H. J. Schäfer, R. Fröhlich: Cathodically initiated cyclodimerization of trimethyl aconitate. J. Electroanal. Chem., 507, 2 –10 (2001).
- T. Gerkensmeier, C. Agena, W. Iwanek, R. Fröhlich, S. Kotila, C. Mäther, J. Mattay: Synthesis and Structural Studies of 5,11,17,23-Tetrahydroxyresorc[4]arenes. Z. Naturforsch. 56b, 1063 –1073 (2001).
- Q. Y. Li, A. H. Parham, M. Nieger, M. Bolte, R. Fröhlich, P. Saarenketo, K. Rissanen, F. Vögtle: Synthesis and X-ray Strcuture of Amide-Based Macrocycles, Catenanes and Pretzelane. Eur. J. Org. Chem., 4041 - 4049 (2001).
- A. Kraft, L. Peters, S. Johann, A. Reichert, F. Osterod, R. Fröhlich: Noncovalent interactions between acidic heterocycles and amidine bases. Mat. Science & Engineering, C18, 9 –13 (2001).
- M. Albrecht, J. Zauner, R. Burgert, H. Röttele, R. Fröhlich: Synthesis of tweezer-type receptors for the recognition of anions: observation of an additive effect of hydrogen bonds on nitrate binding. Mat. Science & Engineering, C18, 185 –190 (2001).
- H.-P. Wu, R. Aumann, R. Fröhlich, B. Wibbeling, O. Kataeva: Highly Selective Formation of [4+2] and [4+3] Cycloadducts of Tetrahydroindenes Generated in Situ from a (1-Alkynyl)carbene Tungsten Complex by the Metalla-1,3,5-hexatriene Route. Chem. Eur. J., 7, 5084– 5093 (2001).
- T. Dreier, K. Bergander, E. Wegelius, R. Fröhlich, G. Erker: Structural and Dynamic Features of Bis[2-[2-furyl)indenyl]zirconium Derivatives. Organometallics, 20, 5067 – 5075 (2001).
- D. Witthaut, R. Fröhlich, H.J. Schäfer: Heterocyclen durch Dominoreaktionen mit Aconitsäuremethylester, einem vileseitigen Synthesebaustein. Angew. Chem., 113, 4354 – 4356 (2001); Angew. Chem. Int. Ed., 40, 4212 – 4214 (2001).
- P. Liptau, S. Knüppel, G. Kehr, O. Kataeva, R. Fröhlich, G. Erker: Formation and structural characterization of amino-substituted [3]ferrocenophanes derived from intramolecular Mannich-type coupling ractions at the metallocene framework.. J. Organomet. Chem., 637-639, 621 – 630 (2001).
- B. Temme, J. Karl, M. Dahlmann, K. Bergander, G. Kehr, H. Luftmann, R. Fröhlich, T. Jödicke, G. Erker: The Development of Single Component Metallocene Betaine Ziegler-Natta Catalysts and Related Systems, in: Advances in Oraganometallic Catalysts and Olefin Polymerization in China and Germany, edited by J. Sun and C. Janiak, Chemical Industry Press, Beijing, 2001.
- A. Bierstedt, J. Stölting, R. Fröhlich, P. Metz: Enzymatic kinetic resolution of 1-(3’- furyl)-3-buten-1-ol and 2-(2’-furyl)-propan-1-ol. Tetrahedron Asymmetry, 12, 3399 – 3407 (2001).
- M. Brüggemann, R. Fröhlich, B. Wibbeling, C. Holst, D. Hoppe: Stereoselective formation of quaternary carbon centres with chiral 3-sulfonyl-1,3-oxazolidines and titanium enolates. Tetrahedron, 58, 321 –340 (2002).
- H.-P. Wu, R. Aumann, R. Fröhlich, E. Wegelius: Bicyclic Cyclopentadienes with N,S Substituents. Eur. J. Org. Chem., 361 - 368 (2002).
- D. Vagedes, G. Erker, R. Fröhlich: Synthesis and structural characterization of [H(OEt2)2]+[(C3H3N2){B(C6F5)3}2]- - a Brønsted acid with an imidazole-derived ‘non- coordinating’ anion. J. Organomet. Chem., 641, 148 – 155 (2002).
- M. Albrecht, K. Witt, R. Fröhlich, O. Kataeva: Inter- and intramolecular hydrogen bonding in amide- and urea-substituted 8-hydroxyquinoline derivatives. Tetrahedron, 58, 561 –567 (2002).
- M. Tamm, T. Bannenberg, B. Dressel, R. Fröhlich, C.Holst: Molybdenum Complexes with Linked Cycloheptatrienyl-Phenolate Ligands. Inorg. Chem., 41, 47 – 59 (2002).
- H.-P. Wu, R. Aumann, R. Fröhlich, B. Wibbeling. Stereocontrolled Synthesis of Angularly Fused Tricyclic Ring Systems by Means of 1-Metalla-1,3,5-hexatrienes (M = Cr, W). Chem. Eur. J., 8, 910– 916 (2002).
- M. Özlügedik, J. Kristensen, B. Wibbeling, R. Fröhlich, D. Hoppe. Nonracemic, Chiral Homoenolate Reagents Derived from (Cycloalk-1-enyl)methyl Carbamates and Evaluation of Their Configurational Stabilities. Eur. J. Org. Chem., 414 - 427 (2002).
- S. Döring, G. Erker, R. Fröhlich. Synthesis of dimetallic µ-alkylideneamido zirconocene dications by a thermodynamically favorable lithium chloride elimination pathway. J. Organomet. Chem., 643 - 644, 61 – 67 (2002).
- K. Kunz, G. Erker, G. Kehr, R. Fröhlich, H. Jacobsen, H. Berke, O. Blacque. Formation of Cyclodimeric (sp2-C1)-Bridged Cp/-Oxido (“CpC1O”MIVX2) Group 4 Metal Ziegler- Natta Catalyst Systems – How Important Is the “Constrained Geometry” Effect? J. Am. Chem. Soc., 124, 3316 – 3326 (2002).
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- M. Tamm, K. Baum, T. Lügger, R. Fröhlich, K. Bergander. Chelate Complexes of Functionalized Cycloheptatrienyl Ligands: 17- and 18-Electron Molybdenum Complexes with Linked Cycloheptatrienyl-Phosphane Ligands and Their Use in Transition Metal Catalysis. Eur. J. Inorg. Chem., 918 - 928 (2002).
- F. E. Hahn, D. Le Van, L. Wittenbecher, M.C. Moyes, T. Von Fehren, R. Fröhlich, E.- U. Würthwein. Novel 1,2,4-Triphosphole, 1,2,3-Triphosphetene and Azaphospholene Derivatives from N-Heterocyclic Carbenes and Phosphaalkynes. Phosphorus, Sulfur and Silicon, 177, 1863 – 1867 (2002).
- R. Aumann, D. Vogt, X. Fu, R. Fröhlich, P. Schwab. Carbocyclic Four-, Five-, and Six- Membered Rings by Condensation of (Alkyl,ethoxy)carbene Complexes (M = W, Cr) with α,β-Unsaturated Tertiary Acid Amines. Organometallics, 21, 1637 – 1645 (2002).
- R. Aumann, D. Vogt, R. Fröhlich. 3-Aza-1-metalla-1,3,5-hexatrienes (M = Cr, W): Generation and π-Cyclization to Pyrroles. Organometallics, 21, 1819 – 1824 (2002).
- A. Deiters, C. Mück-Lichtenfeld, R. Fröhlich, D. Hoppe. Planar-Chiral (2E,7Z)- and (2Z,7E)-Cyclonona-2,7-dien-1-yl Carbamates by Asymmetric, Bis-Allylic α,α’- Cycloalkylation – Studies on Their Conformational Stability. Chem. Eur. J., 8, 1833– 1842 (2002).
- U. Heinl, P. Hinse, R. Fröhlich, R. Mattes. Monomere und polymere Dimethylamino- thioquadratato-Komplexe: Die Kristallstrukturen von Nickel(II)-, Cobalt(II)-, Silber(I)-, Platin(II)-, Gold(I)-, Quecksilber(II)- und Blei(II)-Dimethylaminothioquadrataten. Z. Anorg. Allg. Chem., 628, 770 – 778 (2002).
- B. Jaki, O. Sticher, M. Veit, R. Fröhlich, G. F. Pauli. Evaluation of Glucoiberin Reference Material from Iberis amara by Spectroscopic Fingerprinting. J. Nat. Prod., 65, 517 – 522 (2002).
- D. Hüerländer, R. Fröhlich, G. Erker. Synthesis and structural characterization of Group 4 metallocene complexes that contain remote carboxamide functionalities at their Cp-side chains. J. Chem. Soc., Dalton Trans., 1513 – 1520 (2002).
- K. Kunz, G. Erker, S. Döring, S. Bredeau, G. Kehr, R. Fröhlich. Formation of sp3-C1- Bridged Cp/Amido Titanium and Zirconium “CpCN” Constrained-Geometry Ziegler- Natta catalyst Systems. Organometallics, 21, 1031 – 1041 (2002).
- J. G. Peters, M. Seppi, R. Fröhlich, B. Wibbeling, D. Hoppe. Stereoselective Intermolecular Carbolithiation of Open-Chain and Cyclic 1-Aryl-1-alkenyl N,N- Diisopropylcarbamates Coupled with Electrophilic Substitution. Observation of p- Carboxylation in a Benzyllithium Derivative. Synthesis, 381 –392 (2002).
- G. Haufe, D. Wölker, R. Fröhlich. Selectivity of Biohydroxylation with Beauveria bassiana of trans-2-Fluorocycloalkyl N-Phenylcarbamates. J. Org. Chem., 67, 3022 – 3028 (2002).
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- S. R. Waldvogel, E. Aits, C. Holst, R. Fröhlich. Dehydrodimerization of iodobenzenes to iodinated biaryls. Chem. Commun., 1278 – 1279 (2002).
- T. Glaser, M. Gerenkamp, R. Fröhlich. Gezielte Synthese von ferromagnetisch gekoppelten Komplexen mit modifizierten 1,3,5-Trihydroxybenzolliganden. Angew. Chem., 114, 3984 – 3986 (2002); Angew. Chem. Int. Ed., 41, 3823 – 3825 (2002).
- M. Albrecht, O. Blau, R. Fröhlich. “Size-selectivity” in the template-directed assembly of dinuclear triple-stranded helicates. Proc. Natl. Acad. Sci. USA, 99, 4867 – 4872 (2002).
- V. O. Rogatchov, H. Bernsmann, P.Schwab, R. Fröhlich, B. Wibbeling, P. Metz. Preparation of enantiopure sultams by intramolecular Diels-Alder reaction of furan- containing vinylsulfonamides. Tetrahedron Letters, 43, 4753 – 4756 (2002).
- H. Bernsmann, Y. Wang, R. Fröhlich, P. Metz. Amino analogs of actic acids – synthesis and lactamization. Tetrahedron, 58, 4451 – 4457 (2002).
- D. Vagedes, G. Kehr, D. König, K. Wedeking, R. Fröhlich, G. Erker, C. Mück- Lichtenfeld, S. Grimme. Formation of Isomeric Bar3 Adducts of 2-Lithio-N- methylimidazole. Eur. J. Inorg. Chem., 2015 - 2021 (2002).
- J. W. Strauch, G. Erker, G. Kehr, R. Fröhlich. Bildung eines zwitterionischen Einkomponentenkatalysators für die Ethenpolymerisation auf Basis von Butadiennickelkomplexen: ein alternativer Aktivierungsweg bei homogenen Ziegler- Natta-Katalysatoren später Übergangsmetalle. Angew. Chem., 114, 2662 – 2664 (2002); Angew. Chem. Int. Ed., 41, 2543 – 2545 (2002).
- N. B. Singh, A. Pathak, R. Fröhlich. Single Crystal Formation by Solid-State Reaction between p-Benzoquinone and 2,4,5-Trichlorophenol. Aust. J. Chem., 55, 271 –273 (2002).
- M. Oelgemöller, C. Schiel, R. Fröhlich, J. Mattay. The “Photo-Friedel-Crafts Acylation” of 1,4-Naphthoquinones. Eur. J. Org. Chem., 2465 - 2474 (2002).
- T. Dreier, F. Hannig, G. Erker, K. Bergander, R. Fröhlich. Conformational features of a furyl-substituted bis(tetrahydroindenyl)zirconium dichloide system. J. Phys. Org. Chem., 15, 582 – 589 (2002).
- C. Held, R. Fröhlich, P. Metz. Enantioselective Synthesis of the Molluscicidal Furanosesquiterpene Lactones Ricciocarpin A and Ricciocarpin B via Ring Closing Metathesis. Adv. Synth. Catal., 344, 720 – 727 (2002).
- M. Albrecht, J. Zauner, R. Fröhlich, O. Kataeva, E. Wegelius, K. Rissanen. Tweezer- Type Catechol and Resorcinol Derivatives: Preparation, Structures, and First Investigations Towards their Hydrogen Bonding Abilities. Synthesis, 1434 – 1444 (2002).
- D. Hüerländer, N. Kleigrewe, G. Kehr, G. Erker, R. Fröhlich. Synthesis, Structural and Chemical Characterization of Unsaturated C4- and C10-Bridged Group-4 ansa- Metallocenes Obtained Through a Ring-Closing Olefin Metathesis Reaction. Eur. J. Inorg. Chem., 2633 - 2642 (2002).
- C. Höltke, G. Erker, G. Kehr, R. Fröhlich, O. Kataeva. The Reaction of (Butadiene)zirconocene with Imines. Eur. J. Inorg. Chem., 2789 - 2799 (2002).
- S. Courtenay, S. Smith, E. Hollink, U. Blaschke, G. Kehr, R. Fröhlich, G. Erker, D. W. Stephan. Synthesis of a Dinuclear µ-(η2-Thioaldehyde)zirconocene Cation Complex. Z. Naturforsch., 57b, 1184 – 1188 (2002).
- D. Harmsen, G. Erker, R. Fröhlich, G. Kehr. Reaction of [(Cp2TiCH3)(THF)+][BPh4-] with Tripeptide Derivatives: Formation of Cationic (Peptide)titanocene Complexes. Eur. J. Inorg. Chem., 3156 - 3171 (2002).
- B. Chankvetadze, N. Burjanadze, J. Breitkreuz, K. Bergander, D. Bergenthal, O. Kataeva, R. Fröhlich, H. Luftmann, G. Blaschke. Mechanistic study of the opposite migration order of the enantiomers of ketamine wit α- and β-cyclodextrin incapillary electrophoresis. J. Sep. Sci., 25, 1155- 1166 (2002).
- W. Iwanek, R. Fröhlich, P. Schwab, V. Schurig. The synthesis and crystallographic structures of novel bora-oxazino-oxazolidine derivatives of resorcarene. Chem. Commun., 2516 – 2517 (2002).
- C. Ludovici, R. Fröhlich, K. Vogtt, B. Mamatt, M. Lübben. Caged O2 – Reaction of cytochrome bo3 oxidase with photochemically released dioxygen from a cobalt peroxo complex. Eur. J. Biochem., 269, 2630 – 2637 (2002).
- I. Bauer, R. Fröhlich, A. Y. Ziganshina, A. V. Prosvirkin, M. Gruner, E. Kh. Kazakova, W. D. Habicher. Synthesis and Structural Peculiarities of Homeomorphic Phosphorus Bridgehead Macrobicyclic Compounds and Novel Dioxaphospha[3.1.1.]p,m,p- cyclophanes. Chem. Eur. J., 8, 5622 – 5629 (2002).
- F. Marr, R. Fröhlich, D. Hoppe. Preparation of meso-1,3-diphenylallyllithium.(-)- sparteine – its crystal structure and reactions. Tetrahedron Asymmetry, 13, 2587 – 2592 (2002).
- M. Albrecht, K. Witt, P. Weis, E. Wegelius, R. Fröhlich. Zinc(II)complexes of amide- and urea-substituted 8-hydroxyquinolines. Inorg. Chim. Acta, 341, 25 – 32 (2002).
- M. Niehues, G. Kehr, G. Erker, B. Wibbeling, R. Fröhlich, O. Blacque, H. Berke. Structural characterization of Group 4 transition metal halide bis-Arduengo carbene complexes MCl4L2: X-ray crystal structure analyses and DFT calculations. J. Organomet. Chem., 663, 192 – 203 (2002).
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- P. Becker, L. Bohatý, R. Fröhlich, H. J. Eichler, K. Ueda, K. Takaichi, J. Hanuza, M. Maczka, H. Rhee, A. A. Kaminskii. Non-centrosymmetric molybdates CsLiMoO4 and CsLiMoO4 . 1/3 H2O: crystal growth, polymorphism, efficient Stokes and anti-Stokes generation and cascaded self-frequency [χ(3)(SRS) -χ(2)(SFM)] conversion effects. Phys. Stat. Sol. (a) 13, 2543 – 2564 (2005).
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- W. Iwanek, R. Fröhlich, A. Wzorek. The synthesis and crystallographic structure of a bora-oxazino-oxazolidine derivative of resorcinarene obtained from (-)-(1R,2R)-nor pseudoephedrine. Inorg. Chem. Comm, 603 – 605 (2005).
- L. I. Kursheva, O. N. Kataeva, S. V. Reova, E. S. Batyeva, O.G. Sinyashin, R. Fröhlich. Synthesis and Structure of Copper(II) Phosphodithioite Complexes. Russ. J. Gen. Chem. 75, 851 –855 (2005).
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- I. M. Malkowsky, C. E. Rommel, K. Wedeking, R. Fröhlich, K. Bergander, M. Nieger, C. Quaiser, U. Griesbach, H. Pütter, S. R. Waldvogel. Facile and Highly Diastereo-selective Formation of a Novel Pentacyclic Scaffold by Direct Anodic Oxidation of 2,4-Dimethylphenol. Eur. J. Org. Chem., 241 - 245 (2006).
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- S. A. Cummings, R. Radford, G. Erker, G. Kehr, R. Fröhlich. Formation of a Dynamic η2(O,N)-Hydroxylaminato Zirconocene Complex by Nitrosoarene Insertion into a Zr-C σ-Bond. Organometallics, 25, 839 – 842 (2006).
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- L. Tebben, M. Neumann, G. Kehr, R. Fröhlich, G. Erker, S. Losi, P. Zanello. Development of a cenvenient new synthetic route to [3]ferrocenophanes. J. Chem. Soc., Dalton Trans., 1715 - 1720 (2006).
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- M. Ullrich, R. J. F. Berger, C. Lustig, R. Fröhlich, N. W. Mitzel. „Isomerism“ of Coordination Modes and Numbers in Pentanuclear Organozinc Hydroxylamides: An Exercise in Subtle Substituent Size Effects. Eur. J. Inorg. Chem., 4219 - 4224 (2006).
- S. Hruschka, R. Fröhlich, P. Kirsch, G. Haufe. Synthesis of New Enantiopure Fluorinated Phenylcyclopropanecarboxylates – Potential Chiral Dopants for Liquid-Crystal Compositions. Eur. J. Org. Chem., 141 - 148 (2007).
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- S. Busi, R. Fröhlich, M. Lahtinen, R. Sillanpää, K. Rissanen. Crystal Structures and Thermal Behavior of Bis(dibenzyldimethylammonium) Tetrabromometallates(II) [M = Mn(II), Co(II) and Zn(II)] and their Solvates. Z. Naturforsch. 62b, 35 – 43 (2007).
- T. Glaser, I. Liratzis, R. Fröhlich, T. Weyhermüller. A trinucleating ligand based on 1,8-naphthalendiol: synthesis, structural and magnetic properties of a linear CuII CuII CuII complex. Chem. Comm. 356 – 358 (2007).
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- M. Albrecht, O.Osetska, J. Klankermayer, R. Fröhlich, F. Gumy, J.-C. G. Bünzli. Enhancement of near-Ir emission by bromine substitution in lanthanide complexes with 2-carboxamide-8-hydroxyquinoline. Chem. Comm. 1834 – 1836 (2007).
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- S. Jana, R. J. F. Berger, R. Fröhlich, T. Pape, N. W. Mitzel. Oxygenation of Simple Zinc Alkyls: Surprising Dependence of Product Distributions of the Alkyl Substituents and the Presence of Water. Inorg. Chem., 46, 4293 – 4297 (2007).
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- M. Albrecht, S. Schmidt, S. Dehn, C. Wickleder, S. Zhang, A. P. Bassett, Z. Pikramenou, R. Fröhlich. Diastereoselective formation of luminescent dinuclear lanthanides(III) helicates with enantiomerically pure tartaric acid derived bis(ß-diketonate)ligands. New J. Chem. 1755 – 1762 (2007).
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- T. Glaser, M. Heidemeier, R. Fröhlich. The first trinuclear manganese triplesalen complex: Synthesis, structural, and magnetic characterization [(talenNO2) {MnIII(DMSO)2}3](ClO4)3. C. R. Chimie, 10, 71 – 78 (2007).
- Y.-L. Chen, J. Pyplo-Schnieders, H. Redlich, H. Luftmann, R. Fröhlich. Preparation of 2-deoxystreptamine derivatives with all-axial substituents for desymmetrization. Tetrahedron. Letters, 48, 8145 – 4148 (2007).
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- M. Albrecht, O. Osetska, R. Fröhlich, J.-C. G. Bünzli, A. Aebischer, F. Gumy, J. Hamacek. Highly Efficient Near-IR Emitting Yb/Yb and Yb/Al Helicates. J. Am. Chem. Soc., 129, 14178 – 14179 (2007).
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- J. Becker, K. Bergander, R. Fröhlich, D. Hoppe. Asymmetrische Totalsynthese und Festkörperstruktur des marinen cytotoxischen Diterpens (+)-Vigulariol. Angew. Chem., 120, 1678 – 1681 (2008), Angew. Chem. Int. Ed., 47, 1654 – 1657 (2008).
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- B. Jung, W. Englberger, R. Fröhlich, D. Schepmann, K. Lehmkuhl, B. Wünsch. Synthesis and pharmacological evaluation of bicyclic SNC80 analogues with separated benzhydryl moiety. Bioorg. Med. Chem. 16, 2870 – 2885 (2008).
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- S. Busi, H. Saxell, R. Fröhlich, K. Rissanen. The role of cation...π interactions in capsule formation: co-crystals of resorcinarenes and alkyl ammonium salts. Cryst. Eng. Comm. 1803 – 1809 (2008).
- P. Becker, R. Fröhlich. Polymorphy of monoclinic terbium triborate, TbB3O6. Cryst. Res. Technol. 43, 1240 – 1246 (2008).
- R. Holl, M. Dykstra, M. Schneiders, R. Fröhlich, M. Kitamura, E.-U. Würthwein, B. Wünsch. Synthesis of 2,5-Diazabicyclo[2.2.2]octanes by Dieckmann Analogous Cyclization. Aust. J. Chem. 61, 914 – 919 (2008).
- H. Lange, R. Fröhlich, D. Hoppe. Cu(I)-catalyzed stereospecific coupling reactions of enantioenriched α-stannylated benzyl carbamates and their application. Tetrahedron 64, 9123 – 9135 (2008).
- R. Marcia de Figueiredo, P. Oczipka, R. Fröhlich, M. Christmann. Synthesis of 4-Maleimidobutyric Acid and Realted Maleimides. Synthesis 1316 – 1318 (2008).
- J.-B. Greving, H. Behrens, R. Fröhlich, E.-U. Würthwein. Multivalent 1-Oxa-3,5,7-triazahepta-1,3,5-trienes: Synthesis, Structural Properties and Metal Coordination. Eur. J. Org. Chem., 5740 - 5754 (2008).
- H. Wang, R. Fröhlich, G. Kehr, G. Erker. Heterolytic dihydrogen activation with the 1,8-bis(diphenylphosphino)-naphthalene/B(C6F5)3 pair and its application for the metal-free catalytic hydrogenation of silyl enol ethers. Chem. Comm. 5966 – 5968 (2008).
- M. Sax, R. Fröhlich, D. Schepmann, B. Wünsch. Synthesis and NMDA Receptor Affinity of Ring and Side Chain Homologues of Dexoxadrol. Eur. J. Org. Chem., 6015 - 6028 (2008).
- J. P. H. Charmant, M. F. Haddow, F. E. Hahn, D. Heitmann, R. Fröhlich, S. M. Mansell, C. A. Russell, D.F. Wass. Syntheses and moelcular structures of some saturated N-heterocyclic plumbylenes. J. Chem. Soc., Dalton Trans., 6055 - 6059 (2008).
- C. Herrmann, G. Kehr, R. Fröhlich, G. Erker. Chemical Behavior of a Pair of (COD)CpRh and –Ir Complexes with Pendant Peripheral -B(C6F5)3 Groups. Organometallics, 27, 2328 – 2336 (2008).
- C. Chen. R. Fröhlich, G. Kehr, G. Erker. Structural Features of Lithio[3]ferrocenophane Systems Bearing Stabilizing Dimethylamino Substituents. Organometallics, 27, 3248 – 3253 (2008).
- E. Orselli, R. Q. Albuquerque, P. M. Fransen, R. Fröhlich, H. M. Jansen, L. De Cola. 1,2,3-Triazolyl-pyridine derivatives as chelating ligands for blue iridium(III) complexes. Photophysics and electroluminescent devices. J. Mater. Chem. 18, 4579 – 4590 (2008).
- C. Lohre, R. Fröhlich, F. Glorius. Thiazole-Annelated Imidazolium Salts: A New Architecture for N-Heterocyclic Carbenes. Synthesis 2221 – 2228 (2008).
- M. Siemer, R. Fröhlich, D. Hoppe. Asymmetric Synthesis of 3,4-Annulated Cyclopentenones from Cycloalkenyl Ketones and Vinyl Carbamates by Diastereoselective Carbonyl Addition/Conrotatory 4π Ring Closure. Synthesis 2264 – 2270 (2008).
- J. Ugolotti, G. Dierker, G. Kehr, R. Fröhlich, S. Grimme, G. Erker. Metallacyclische Fünfring-Allenoide: Synthese und Struktur stabiler stark verzerrter cyclischer Allen-Derivate. Angew. Chem., 120, 2662 – 2665 (2008), Angew. Chem. Int. Ed., 47, 2622 – 2625 (2008).
- F. E. Hahn, M. Offermann, C. Schulze Isfort, T. Pape, R. Fröhlich. Heterodimetall-Dreistranghelicate mit direktionalen Benzol-o-dithiolat/Brenzcatechinat-Liganden. Angew. Chem., 120, 6899 – 6902 (2008), Angew. Chem. Int. Ed., 47, 6794 – 6797 (2008).
- P. Spies, S. Schwendemann, S. Lange, G. Kehr, R. Fröhlich, G. Erker. Metallfreie katalytische Hydrierung von Enaminen, Iminen und konjugierten Phosphinoalkenyl-boranen. Angew. Chem., 120, 7654 – 7657 (2008), Angew. Chem. Int. Ed., 47, 7543 – 7546 (2008).
- B. T. Hahn, R. Fröhlich, K. Harms, F. Glorius. Prolinkatalysierte hochenantio- und anti-selektive Mannich-Reaktion nichtaktivierter Ketone – Synthese chiraler α-Aminosäuren. Angew. Chem., 120, 10134 – 10137 (2008), Angew. Chem. Int. Ed., 47, 9985 – 9988 (2008).
- U. Kiehne, T. Bruhn, G. Schnakenburg, R. Fröhlich, G. Bringmann, A. Lützen. Synthesis, Resolution, and Absolute Configuration of Difunctionalized Tröger’s Base Derivatives. Chem. Eur. J., 14, 4246 – 4255 (2008).
- J. Niemeyer, G. Kehr, R. Fröhlich, G. Erker. Mastering the Third Dimension of Salicylaldimine-Type Ligand Systems: Development of a Conveniet Route to Bis(„ferrocene-saliminato“)-zirconium Chemistry. Chem. Eur. J., 14, 9499 – 9502 (2008).
- S. Rendler, O. Plefka, B. Karatas, G. Auer, R. Fröhlich, C. Mück-Lichtenfeld, S. Grimme, M. Oestreich. Stereoselective Alcokol Silylation by Dehydrogenative Si-O Coupling: Scope, Limitations, and Mechanism of the Cu-H-Catalyzed Non-Enzymatic Kinetic Resolution with Silicon-Stereogenic Silanes. Chem. Eur. J., 14, 11512 – 11528 (2008).
- L. Braun, G. Kehr, R. Fröhlich, G. Erker. Bis(diphenylphosphino)acetonitrile oxides, -sulfides and –imines: Their formation and structural features, and the remarkable structures of two lithiated derivatives. Inorg. Chim. Acta 361, 1668 – 1675 (2008).
- J. Hajduch, G. Nam, E. J. Kim, R. Fröhlich, J. A. Hanover, K. L. Kirk. A convenient synthesis of the C-1-phosphonate analogue of UDP-GlcNAc and ist evaluation as an inhibitor of O-linked GlcNAc transferase (OGT). Carbohydrate Res. 343, 189 – 195 (2008).
- B. Schulte, R. Fröhlich, A. Studer. Atroposelective radical aryl migration reactions from sulfur to carbon. Tetrahedron 64, 11852 – 11859 (2008).
- M. Moriya, R. Fröhlich, G. Kehr, G. Erker, S. Grimme. Structural Features of [(CpPPh2AuCl)2ZrCl2]: Exploring the Limits of Aurophilic Interactions. Chem. Asian J. 3, 753 – 758 (2008).
- M. S. Maji, R. Fröhlich, A. Studer. Desymmetrization of Metallated Cyclohexadienes with Chiral N-tert-Butanesulfinyl Imines. Org. Letters 10, 1847 – 1850 (2008).
- G. Singh, B. P. Baranwal, I. P. S. Kapoor, D. Kumar, C. P. Singh, R. Fröhlich. Some transition metal nitrate complexes with hexamethylenetetramine. Preparation, X-ray crystallography and thermal decomposition. J. Therm. Anal. Calorim. 91, 971 – 977 (2008).
- N. Ghavtadze, R. Fröhlich, K. Bergander, E.-U. Würthwein. Superelectrophilic Intermediates in the Synthesis of Novel Indenole Derivatives via 1,5-Cyclization Reactions of 5-Aryl-1-azapenta-1,4-dien-3-ones. Synthesis 3397 – 3406 (2008).
- L. Tebben, K. Bussmann, M. Hegemann, G. Kehr, R. Fröhlich, G. Erker. Ferrocene-Derived Bioorganometallic Chemsitry: Preparation of a [3]Ferrocenophane γ-Amino Acid for Use in Peptide Synthesis. Organometallics 27, 4269 – 4272 (2008).
- D. P. Huber, G. Kehr, K. Bergander, R. Fröhlich, G. Erker, S. Tanino, Y. Ohki, K. Tatsumi. Heterolytic Cleavage of Dihydrogen by Frustrated Lewis Pairs Derived from α-(Dimesitylphosphino)ferrocens and B(C6F5)3 . Organometallics 27, 5279 – 5284 (2008).
- C. Wallenhorst, G. Kehr, H. Luftmann, R. Fröhlich, G. Erker. Bis(iminoethyl)pyridine Systems with a Pendant Alkenyl Group. Part A: Cobalt and Iron Complexes and Their Catalytic Behavior. Organometallics 27, 6547 – 6556 (2008).
- C. Wallenhorst, G. Kehr, R. Fröhlich, G. Erker. Unsymmetrical Bis(iminoethyl)pyridine Metal Complexes with a Pendant Alkenyl Substituent. Part B: Internal Olefin Coordination to Ruthenium. Organometallics 27, 6557 – 6564 (2008).
- K. Spannhoff, G. Kehr, S. Kehr, R. Fröhlich, G. Erker. Functionalized phosphorus analogues of the β-diketiminato ligand systems: bis(N-arylphosphinimino)acetonitrile-derived complexes of rhodium and iridium. J. Chem. Soc., Dalton Trans., 3339 - 3344 (2008).
- S. Jana, R. Fröhlich, N.W. Mitzel: Zinc Hydrazides and Hydrazide-Alkoxides with Cyclic and Acyclic Hydrazide Substituents. Z. Anorg. Allg. Chem. 634, 1477 - 1484 (2008).
- J. J. Weigand, M. Holthausen, R. Fröhlich. Formation of [Ph2P5]2+, [Ph4P6]2+, and [Ph6P7]3+ Cationic Clusters by Consecutive Insertions of [Ph2P]+ into P-P Bonds of the P4 Tetrahedron. Angew. Chem., 121, 301 – 304 (2009), Angew. Chem. Int. Ed., 48, 295 – 298 (2009).
- S. Bredeau, E. Ortega, G. Delmas, P. Richard, R. Fröhlich, B. Donnadieu, G. Kehr, N. Pirio, G. Erker, P. Meunier. Versatile Behavior of Conjugated Diynes with Zirconocene Reactive Species. Organometallics 28, 181 – 187 (2009).
- T. Glaser, M. Heidemeier, E. Krickemeyer H. Bögge, A. Stammler, R. Fröhlich, E. Bill, J. Schnack. Exchange Interactions and Zero-Field Splittings in C3-Symmetric MnIII6FeIII: Using Molecular Recognition for the Construction of a Series of High Spin Complexes Based on the Triplesalen Ligand. Inorg. Chem., 48, 607 – 620 (2009).
- H. Richter, H. Schwertfeger, P. R. Schreiner, R. Fröhlich, F. Glorius. Synthesis of Diamantane-Derived N-Heterocyclic Carbenes and Applications in Catalysis. Synlett 193 – 197 (2009).
- A. Dutta, S. Kar, R. Fröhlich, P. Koley, A. Pramanik. A terminally modified pseudopeptide (Gly-m-aminobenzoic acid) produces supramolecular helix, staircase and water-mediated ß-sheet through self-assembly. ARKIVOC, 31-43 (2009).
- A. Dutta, S. Kar, R. Fröhlich, P. Koley, A. Pramanik. Studies of the ß-sheet mediated self-assembly of designed synthetic peptides of general formula PhCO-Gly-Xx-OCH2Ph and the possible role of aromatic π-π interactions in the self-assembly. ARKIVOC, 247-259 (2009).
- J. Ugolotti, G. Kehr, R. Fröhlich, S. Grimme, G. Erker. Five-Membered Zirconacyclo-allenoids: Synthesis and Characterization of Members of a Unique Classs of Internally Metal-Stabilized Bent Allenoid Compounds. J. Am. Chem. Soc., 131, 1996 – 2007 (2009).
- M. Albrecht, Y. Liu, S. S. Zhu, C. A. Schalley, R. Fröhlich. Self-assembly of heterodinuclear triple-stranded helicates: control by coordination number and charge. Chem. Comm. 1195 – 1197 (2009).
- S. Jaunich, R. Fröhlich, A. Wilken, J. von Zamory, A. Wakamiya, S. Yamaguchi, E.-U. Würthwein. 3,4-Dihydro-3H-pyrrol-2-imines as Conformationally Restrained 1,3-Diazabutadienes: Synthesis, Structural Properties and Protonation. Eur. J. Org. Chem., 2077 - 2087 (2009).
- P. Spies, G. Kehr, K. Bergander, B. Wibbeling, R. Fröhlich, G. Erker. Metal-free dihydrogen activation chemistry: structural and dynamic features of intramolecular P/B pairs. J. Chem. Soc., Dalton Trans., 1534 - 1541 (2009).
- S. Kirchberg, R. Fröhlich, A. Studer. Stereoselektive Pd-katalysierte Carboaminoxylierung von Indolen mit Arylboronsäuren und TEMPO. Angew. Chem., 121, 4299 – 4302 (2009), Angew. Chem. Int. Ed., 48, 4235 – 4238 (2009).
- M. Sajitz, R. Fröhlich, E.-U. Würthwein. 1,7-Electrocyclization Reactions of 2-Aza-4,5-benzoheptatrienyl- and 4-Aza-6,7-benzononatetraenyllithium Compounds: Synthesis of Novel 2-Benzazepines and (Benzocyclooctenyl)amines. Eur. J. Org. Chem., 2342 - 2353 (2009).
- J. Niemeyer, G. Kehr, R. Fröhlich, G. Erker. Selective synthesis of the 2-hydroxyferrocene-aldimine enantiomers – extended planar chiral analogues of the “flat” salicylaldimine ligand family. J. Chem. Soc., Dalton Trans., 3716 - 3730 (2009).
- J. Niemeyer, G. Kehr, R. Fröhlich, G. Erker. Bis(“ferrocene-saliminato“) group 4 metal complexes: synthesis, structural features and use in homogenous Ziegler-Natta polymerization catalysis. J. Chem. Soc., Dalton Trans., 3731 – 3741 (2009).
- N. Ghavtadze, R. Fröhlich, E.-U. Würthwein. Cyclization Reactions of 1-Amino-5-trifluoromethyl-5-thienyl-1-azapenta-1,4-dien-3-ones under Superelectrophilic Conditions: Synthesis of Novel Benzothiophenols, Cyclopentenols and Dihydrodiazepinols. Eur. J. Org. Chem., 1228 - 1240 (2009).
- B. Birkmann, A. W. Ehllers, R. Fröhlich, K. Lammertsma, F. E. Hahn. Metallosupra-molecularComplexes Derived from Bis(benzene-o-dithiol) Ligands. Chem. Eur. J., 15, 4301 – 4311 (2009).
- G. Dierker, J. Ugolotti, G. Kehr, R. Fröhlich, G. Erker. Reaction of Bis(alkynyl)silanes with Tris(pentafluorophenyl)borane: Synthesis of Bulky Silole Derivatives by Means of 1,1-Carboboration under Mild Reaction Conditions. Adv. Synth. Catal., 351, 1080 – 1088 (2009).
- K. V. Axenov, G. Kehr, R. Fröhlich, G. Erker. Catalytic Hydrogenation of Sensitive Organometallic Compounds by Antagonistic N/B Lewis Pair Catalyst System. J. Am. Chem. Soc., 131, 3454 – 3455 (2009).
- R. Holl, D. Schepmann, R. Fröhlich, R. Grünert, P. J. Bednarski, B. Wünsch. Dancing of the Second Aromatic Residue around the 6,8-Diazabicyclo[3.2.2]nonane Framework: Influence of σ Receptor Affinity and Cytotoxicity. J. Med. Chem., 52, 2126 – 2137 (2009).
- S. Würtz, C. Lohre, R. Fröhlich, K. Bergander, F. Glorius. IBox[(-)-menthyl]: A Sterically Demanding Chiral NHC Ligand. J. Am. Chem. Soc., 131, 8344 – 8345 (2009).
- C. M. Mömming, E. Otten, G. Kehr, R. Fröhlich, S. Grimme, D. W. Stephan, G. Erker. Reversible, nicht metallunterstützte Bindung von Kohlendioxid durch frustrierte Lewis-Paare. Angew. Chem., 121, 6770 – 6773 (2009), Angew. Chem. Int. Ed., 48, 6643 – 6646 (2009).
- S. M. Husain, R. Fröhlich, D. Schepmann, B. Wünsch. Asymmetric Synthesis of Enantiomerically Pure 2-Substituted Tetrahydro-3-benzazepines and Their Affinity to σ1 Receptors. J. Org. Chem., 74, 2788 – 2793 (2009).
- Y.-L. Chen, R. Fröhlich, D. Hoppe. Copper-catalyzed asymmetric addition of Et2Zn to 2-cyclohexen-1-one and 2-carbamoyloxy-2-cyclohexen-1-one with phosphoramidite, phosphite, and bidentate phosphite.oxazoline ligands. Tetrahedron Asymm. 20, 1144 – 1149 (2009).
- T. Blömker, P. Böckmann, G. Kehr, R. Fröhlich, G. Erker. Synthesis and Reactions of Ferrocenyl-capped Long-Chain Alkynes. Z. Naturforsch. 64b, 587 – 594 (2009).
- C. M. Mömming, S. Frömel, G. Kehr, R. Fröhlich, S. Grimme, G. Erker. Reactions of an Intramolecular Frustrated Lewis Pair with Unsaturated Substrates: Evidence for a Concerted Olefin Addition Reaction. J. Am. Chem. Soc., 131, 12280 – 12289 (2009).
- M. Hill, C. Herrmann, P. Spies, G. Kehr, K. Bergander, R. Fröhlich, G. Erker. Bifunctional Molecular Systems with Pendant Bis(pentafluorophenyl)boryl Groups: From Intramolecular CH-activation to Heterolytic Dihydrogen Splitting, in: Activating Unreactive Substrates, edited by C. Bolm and F. E. Hahn, WiLEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2009.
- C. Walter, R. Fröhlich, M. Oestreich. Rhodium(I)-catalyzed enantioselective 1,4-addition of nucleophilic silicon. Tetrahedron 65, 5513 – 5520 (2009).
- J. Dubarle Offner, R. Fröhlich, O. Kataeva, F. Rose-Munch, E. Rose, K. H. Dötz. Heterobimetallic Cr-Mn Complexes of Fused Arenes: Chromium-Templated Benzannulation of a Cymanthrene-Type Metal Carbene and Haptotropic Metal Migration along a Dibenzo[c,e]indene Platform. Organometallics 28, 3004 – 3011 (2009).
- I. Häger, R. Fröhlich, E.-U. Würthwein. Synthesis of Secondary, Tertiary and Quaternary 1,3,5-Triazapenta-1,3-dienes and Their CoII, ZnII, PdII, CuII and BF2 Coordination Compounds. Eur. J. Inorg. Chem., 2415 - 2428 (2009).
- O. Joistgen, A. Pfletschinger, J. Ciupka, M. Dolg, M. Nieger, G. Schnakenburg, R. Fröhlich, O. Kataeva, K. H. Dötz. P-Coligand Tuning of the Haptotropic Metal Migration in Phenanthrene Chromium Comples. Organometallics 28, 3473 – 3484 (2009).
- T. A. Tumay, G. Kehr, R. Fröhlich, G. Erker. Synthesis of an Amino-Functionalized ansa-Zirconocene by Intramolecular Photochemical Enamine [2+2] Cycloaddition. Organometallics 28, 4513 – 4518 (2009).
- K. V. Axenov, G. Kehr, R. Fröhlich, G. Erker. Functional Group Chemistry at the Group 4 Bent Metallocene Frameworks: Formation and “Metal-Free“ Catalytic Hydrogenation of Bis(imino-Cp)zirconium Complexes. Organometallics 28, 5148 – 5158 (2009).
- N. Ghavtadze, R. Fröhlich, E.-U. Würthwein. Acid-Mediated Electrocyclic Domino Transformations of 5,5-Disubstituted 1-Amino-1-azapenta-1,4-dien-3-ones into Dihydrospiroindenepyrazole and Dihydroindenodiazepine Derivatives. J. Org. Chem., 74, 4584 – 4591 (2009).
- V. T. Trepohl, R. Fröhlich, M. Oestreich. Conjugate phosphination of cyclic and acyclic acceptors using Rh(I)-phosphine or Rh(I)-carbene complexes. Probing the mechanism with chirality at the silicon atom or the phosphorus atom of the Si-P reagent. Tetrahedron 65, 6510 – 6518 (2009).
- K. Ghosh, G. Masanta, R. Fröhlich, I. D. Petsalakis, G. Theodorakopoulos. Triphenyl-Based Receptors in Selective Recognition of Dicarboxylic Acids. J. Phys. Chem. B, 113, 7800 – 7809 (2009).
- M. Emmert, G. Kehr, R. Fröhlich, G. Erker. Facile Cyclometalation Reactions of Cp-Zirconium Complexes with Weakly Lewsi Acidic Rendent Boron Functionalities. Chem. Eur. J., 15, 8124 – 8127 (2009).
- S. Urban, M. Tursky, R. Fröhlich, F. Glorius. Investigation of the properties of 4,5-dialkylated N-heterocyclic carbenes. J. Chem. Soc., Dalton Trans., 6934 – 6940 (2009).
- K. Michel, R. Fröhlich, E.-U. Würthwein. Diastereo- and Enantioselective Synthesis of Functionalized ß-Lactams from Oxiranecarbaldimines and Lithium Ester Enolates. Eur. J. Org. Chem., 5653 - 5665 (2009).
- A. T. Biju, K. Hirano, R. Fröhlich, F. Glorius. Switching the Electron-Donor Properties of N-Heterocyclic Carbenes by a Facile Deprotonation Strategy. Chem. Asian J. 4, 1786 – 1789 (2009).
- M. Albrecht, O. Osetska, J.-C. G. Bünzli, F. Gumy, R. Fröhlich. Homo- and Heterodinuclear Helicates of Lanthanide(III), Zinc(II) and Aluminium(III) Based on 8-Hydroxyquinoline Ligands. Chem. Eur. J., 15, 8791 – 8799 (2009).
- C. Radloff, F. E. Hahn, T. Pape, R. Fröhlich. Supramolecular structures from mono and dimetalated biscarbene ligands. J. Chem. Soc., Dalton Trans., 7215 – 7222 (2009).
- S. R. Waldvogel, A. Faust, W. Barkmann, R. Fröhlich, O. Wolff. Synthesis of Polyhalogenated 2-(Phenylamino)pyridines by Thermal Amination Reactions. Synthesis 1651 – 1654 (2009).
- J. Dömer, F. Hupka, F. E. Hahn, R. Fröhlich. Mono- and Dinuclear Coordination with Directional Bis(dentate) Ligands. Eur. J. Inorg. Chem., 3600 - 3606 (2009).
- M. Albrecht, Y. Yulia, A. Exarchos, P. Nachev. R. Fröhlich. 1:1 vs. 2:1 coordination of pentadentate hydrazone-type ligands to lanthanide(III) ions. Formation of cationic as well as dicationic complexes. J. Chem. Soc., Dalton Trans., 7421 – 77427 (2009).
- J. Ugolotti, G. Kehr, R. Fröhlich, S. Grimme, G. Erker. Nitrile insertion into a boryl-substituted five-membered zirconacycloallenoid: unexpected formation of a zwitterionic boratirane product. Chem. Comm. 6572 – 6573 (2009).
- T. A. Tumay, G. Kehr, R. Fröhlich, G. Erker. Ring-closing metathesis of sterically congested functionalized zirconocene-ethene polymerization catalysts derived from related bridged and open metallocenes. J. Chem. Soc., Dalton Trans., 8923 – 8928 (2009).
- K. Spannhoff, N. Kuhl, G. Kehr, R. Fröhlich, G. Erker. Remarkable Product Diversity in the “Self-Organized“ Reaction of Deprotonated Acetonitrile with Chlorophosphines. J. Am. Chem. Soc., 131, 17836 – 17842 (2009).
- F. Eweiner, S. Senda, K. Bergander, C. Mück-Lichtenfeld, S. Grimme, R. Fröhlich, M. Aoyama, H. Kawaguchi, Y. Ohki, T. Matsumoto, G. Kehr, K. Tatsumi, G. Erker. Evidence for a Rapid Degenerate Hetero-Cope-type Rearrangement in [Cp*W(S)2S-CH2-CH=CH2]. Chem. Asian J. 4, 1830 – 1833 (2009).
- J.-B. Sortais, T. Voss, G. Kehr, R. Fröhlich, G. Erker. 1,2-Olefin addition of a frustrated amine-borane Lewsi pair. Chem. Comm. 7417 – 7418 (2009).
- D. Kracht, S. Saito, R. Fröhlich, B. Wünsch. Synthesis of a Silanol-substituted Proline Analog as Organocatalst. Z. Naturforsch. 64b, 1169 – 1175 (2009).
- M. Willot, L. Radtke, D. Könning, R. Fröhlich, V. H. Gessner, C. Strohmann, M. Christmann. Totalsynthese und absolute Konfiguration des Guaian-Sesquiterpens Englerin A. Angew. Chem., 121, 9269 – 9272 (2009), Angew. Chem. Int. Ed., 48, 9105 – 9108 (2009).
- B. Birkmann, R. Fröhlich, F. E. Hahn. Assembly of a Tetranuclear Host with a Tris(benzene-o-dithiolato) Ligand. Chem. Eur. J., 15, 9325 – 9329 (2009).
- S. Jaunich. R. Fröhlich, A. Wakamiya, S. Yamaguchi, E.-U. Würthwein. Tetraaryl Tetradecahydroporphyrazins: Novel Prophyrin Derivatives Featuring a cyclic Benzene-Ring Tetramer. Chem. Eur. J., 15, 10457 – 10463 (2009).
- D. Intelmann, G. Kummerlöwe, G. Haseleu, N. Desmer, K. Schulze, R. Fröhlich, O. Frank, B. Luy, T. Hofmann. Structures of Storage-Induced Transformation Products of the Beer’s Bitter Principles, Revealed by Sophisticated NMR Spectroscopic and LC-MS Techniques. Chem. Eur. J., 15, 13047 – 13058 (2009).
- G. Lübbe, C. Nilewski, G. Kehr, R. Fröhlich, G. Erker. Synthesis and Characterization of [3]Ferrocenophane-derived P,P-Chelate Ligand Gold Complexes Featuring an Aurophilic Interaction. Z. Naturforsch. 64b, 1413 – 1422 (2009).
- H. Theil, R. Fröhlich, T. Glaser. A Triple Newman-Kwart Rearrangement at a Fully Substituted Benzene Ring. Z. Naturforsch. 64b, 1633 – 1638 (2009).
- A. Flores-Figueroa, O. Kaufhold, A. Hepp, R. Fröhlich, F. E. Hahn.Synthesis of a Ruthenium(II) Complex Containing an [11]ane-P2CNHC (NHC = Imidazolidin-2-ylidene) Macrocycle. Organometallics 28, 6362 – 6369 (2009).
- K. Ghosh, T. Sen, R. Fröhlich, I. D. Petsalakis, G. Theodorakopoulos. trans-Pyridyl and Naphthyridyl Cinnamides as Alternatives for Urea in Complexation of Carboxylic Acid and Formation of Water-Templated Assemblies in the Solid State. J. Phys. Chem. B, 114, 321 -329 (2010).
- D. Kracht, E. Rack, D. Schepmann, R. Fröhlich, B. Wünsch. Stereoselective synthesis and structure-affinity relationships of bicyclic κ receptor agonists. Org. Biomol. Chem. 8, 212- 225 (2010).
- S. Masood Husain, R. Fröhlich, D. Schepmann, B. Wünsch. Enantioselective Synthesis of a 2,2,-Disubstituted Tetrahydro-3-benzazepine as Novel NMDA Receptor Antagonist. Z. Naturforsch. 65b, 191 – 196 (2010).
- M. Albrecht, I. Latorre, Y. Liu, R. Fröhlich. Changing the Overall Shape of Heterodinuclear Helicates via Substitution of Acylhydrazones by Tosylhydrazones. Z. Naturforsch. 65b, 311 – 316 (2010).
- J. Niemeyer, G. Kehr, R. Fröhlich, G. Erker. Salen Ligands Revisited: Synthesis and Application of a Planar Chiral „Ferro-Salen“ Ligand. Eur. J. Inorg. Chem., 680 – 684 (2010).
- I.Peuser, R. Fröhlich, G. Kehr, G. Erker. Reaction of a Stable Conjugated Primary Enamine with Piers‘ Borane. Eur. J. Inorg. Chem., 849 – 853 (2010).
- K. Ghosh, T. Sen, R. Fröhlich. Hydrogen bonded assemblies of 1,8-naphthyridine derivatives: discrete or polymeric structures in the solid state. J. Incl. Phenom. Macrocycl. Chem., 68, 193 – 199 (2010).
- P. Srivastava, I. P. Singh Kapoor, G. Singh, R. Fröhlich. Preparation, X-ray crystallography, and thermolysis of phenylendiammonium dibromide salts. J. Therm. Anal. Calorim., 100, 233 – 238 (2010).
- I. P. Singh Kapoor, M. Kapoor, G. Singh, R. Fröhlich. Solid state synthesis of ring-substituted aminobenzenesulphonic acids. Ind. J. Chem., 49B, 1556 – 1560 (2010).
- A. Banerjee, R. Fröhlich, D. Schepmann, B. Wünsch. Synthesis and NMDA receptor affinity of dexoxadrol analogues with modifications in position 4 of the piperidine ring. Med. Chem. Commun., 87-102 (2010).
- M. P. Quick, R. Fröhlich, B. Wünsch. (3R,11aR)-3-Phenyl-2,3,11,11a-tetrahydro-[1,3]oxazolo[3,2-b]-[2]benzazepin-5(10H)-one as a chiral building block for the asymmetric synthesis of 3-substituted 2-benzazepines. Tetrahedron Asymmetry, 21, 524 – 526 (2010).
- M. Mewald, a. Weickgenannt, R. Fröhlich, M. Oestreich. Expeditious synthesis of TADDOL-derived phosphoramidite and phosphonite ligands. Tetrahedron Asymmetry, 21, 1232 – 1237 (2010).
- J. Niemeyer, J. Cloppenburg, R. Fröhlich, G. Kehr, G. Erker. Salen ligands based on a planar-chiral hydroxyferrocene moiety: Synthesis, coordination chemistry and use in asymmetric silylcyanation.J. Organomet. Chem., 695, 1801 – 1812 (2010).
- M. Heitbaum, R. Fröhlich, F. Glorius. Diastereoselective Hydrogenation of Substituted Quinolines to Enantiomerically Pure Decahydroquinolines. Adv. Synth. Catal., 352, 357 – 362 (2010).
- B. T. Hahn, F. Tewes, R. Fröhlich, F. Glorius. Olefin-Oxazoline (OlefOX) – modulare, leicht zu variierende Liganden für die asymmetrische Katalyse. Angew. Chem., 122, 1161 – 1164 (2010), Angew. Chem. Int. Ed., 49, 1143 – 1146 (2010).
- N. Ghavtadze, R. Fröhlich, E.-U. Würthwein. Indole as Neutral Leaving Group in Silver Nitrate Induced Cyclization Reactions of N-{2-[Alkynyl(hetero)aryl]methylene}indolin-1-amines for the Synthesis of Annulated Pyridine Derivatives. Eur. J. Org. Chem., 1787 – 1797 (2010).
- I. Greger, G. Kehr, R. Fröhlich, G. Erker. Functional Group Chemistry at the Group 4 Bent Metallocene Framework: [2+2]Cycloaddition of the Parent Bis(vinyl-Cp/vinyl-Ind)ZrCl2 Systems.Organometallics, 29, 860 – 866 (2010).
- J. F. Schneider, F. C. Falk, R. Fröhlich, J. Paradies. Planar-Chiral Thioureas as Hydrogen-Bond Catalysts. Eur. J. Org. Chem., 2265 – 2269 (2010).
- L. Bohaty, R. Fröhlich, P. Held, P. Becker. Non-Centrosymmetric Ammonium Rare Earth Nitrates (NH4)2Ln(NO3)5.4H2O – Crystal Structure, Crystal Growth and Optical Properties. Eur. J. Inorg. Chem., 2642 – 2648 (2010).
- S. Schwendemann, T. A. Tumay, K. V. Axenov, I. Peuser, G. Kehr, R. Fröhlich, G. Erker. Metal-Free Frustrated Lewis Pair catalyzed 1,4-Hydrogenation of Conjugated Metallocene Dienamines. Organometallics, 29, 1067 – 1069 (2010).
- C. M. Mömming, G. Kehr, B. Wibbeling, R. Fröhlich, B. Schirmer, S. Grimme, G. Erker. Cyclische Allene und Cumulene durch kooperative Addition frustrierter Lewis-Paare an konjugierte Enine und Diine. Angew. Chem., 122, 2464 – 2467 (2010), Angew. Chem. Int. Ed., 49, 2414 – 2417 (2010).
- T. Hemery, J. Becker, R. Fröhlich, D. Hoppe. (-)-Myrtenyl N,N-Diisopropylcarbamate: Stereochemistry of Lithiation and Electrophilic Substitution Directed by Dynamic Kinetic Diastereoisomer Resolution. Eur. J. Org. Chem., 3711 – 3720 (2010).
- I. Greger, G. Kehr, R. Fröhlich, G. Erker. Dynamic Topochemical Reaction Control – A Principle and Its Application in ansa-Metallocene Synthesis.Organometallics, 29, 3210 – 3221 (2010).
- T. Hemery, B. Wibbeling,R. Fröhlich, D. Hoppe. Stereoselective Synthesis of Highly Substituted Annulated Dihydropyrans Based on γ-Lithiation and Homoaldol Reaction of an Enantiopure α-Silylated Vinyl Carbamate. Synthesis, 0392 – 0342 (2010).
- S. Kollmann, R. Fröhlich, D. Hoppe. Highly Stereoselective Synthesis of 2-Amino-3-C-methyl-2,3-dideoxyaldoses by C3-Chain Elongation via Homolaldol Reaction of Sugar Aldehydes. Synthesis, 0749 – 0756 (2010).
- J. I. Clodt, V. D. Hack, R. Fröhlich. E.-U. Würthwein. Synthesis of Bis(N-acylamidines) from Amidines and N-Acylbenzotriazoles. Synthesis, 1485 – 1492 (2010).
- M. Albrecht, O. Osetska, T. Rantanen, R. Fröhlich. C. Bolm. Microwave-Assisted Preparation of Quinolone and Quinoline Derivatives. Synlett, 1081 – 1084 (2010).
- C. Chen, F. Eweiner, B. Wibbeling, R. Fröhlich, S. Senda, Y. Ohki, K. Tatsumi, S. Grimme, G. Kehr, G. Erker. Exploring the Limits of Frustrated Lewis pair Chemistry with Alkynes: Detection of a System that Favors 1,1-Carboboration over Cooperative 1,2-P/B-Addition. Chem. Asian J., 5, 2199 – 2208 (2010).
- J. Ugolotti, G. Kehr, R. Fröhlich, G. Erker. Photochemical isomerisation of boryl-substituted silole derivatives. Chem. Comm., 3016 – 3018 (2010).
- C. Usener, G. Kehr, R. Fröhlich, B. Wibbeling, C. Mück-Lichtenfeld, G. Erker. Developing a Reliable Synthetic Route to cis-1,3-Bridge-Disubstituted [3]Ferrocenophane Systems. Organometallics, 29, 3210 – 3221 (2010).
- T. Hemery, R. Huenerbein, R. Fröhlich, S. Grimme, D. Hoppe. Configurationally Labile Enantioenriched Lithiated 3-Arylprop-2-enyl Carbamates: Joint Experimental and Quantum Chemical Investigations of the Equilibrium of Epimers. J. Org. Chem., 75, 5716 – 5720 (2010).
- C. Chen, R. Fröhlich, G. Kehr, G. Erker. Remarkably variable reaction modes of frustrated Lewis pairs with non-conjugated terminal diacetylenes. Chem. Comm., 3580 – 3582 (2010).
- D. J. Vyas, R. Fröhlich, M. Oestreich. Stereochemical Surprises in the Lewis Acid-Mediated Allylation of Isatins. J. Org. Chem., 75, 6720 – 6723 (2010).
- K. Unverhau, G. Lübbe, B. Wibbeling, R. Fröhlich, G. Kehr, G. Erker. Frustrated Lewis Pair Reactions at the [3]Ferrocenophane Framework. . Organometallics, 29, 5320 – 5329 (2010).
- A. R. Cabrera, Y. Schneider, M. Valderrama, R. Fröhlich, G. Kehr, G. Erker, R. S. Rojas. Synthesis of a [(π-Cyano-nacnac)Cp]zirconium Complex and Its Remote Activation for Ethylene Polymerization. . Organometallics, 29, 6104 – 6110 (2010).
- P. Hegele, B. Santhamma, G. Schnakenburg, R. Fröhlich, O. Kataeva, M. Nieger, K. Kotsis, F. Neese, K. H. Dötz. Hydroquinoid Chromium Complexes Bearing an Acyclic Conjugated Bridge: Chromium-Templated Synthesis, Molecular Structure, and Haptotropic Metal Migration. Organometallics, 29, 6172 – 6185 (2010).
- S. K. Sunnam, D. Schepmann, E. Rack, R. Fröhlich, K. Korpis, P. J. Bednarski, B. Wünsch. Synthesis and biological evaluation of conformationally restricted σ1 receptor ligands with 7,9-diazabicyclo[4.2.2]decane scaffold. Org. Biomol. Chem. 8, 5525- 5540 (2010).
- M. Albrecht, M. Baumert, H. D. F. Winkler, C. A. Schalley, R. Fröhlich. Hierachical self-assembly of metallo-dendrimers. J. Chem. Soc., Dalton Trans., 7220 - 7222 (2010).
- C. M. Mömming, G. Kehr, B. Wibbeling, R. Fröhlich, G. Erker. Addition reactions to the intramolecular mesityl2-P-CH2-CH2-B(C6F5)2 frustrated Lewis pair. J. Chem. Soc., Dalton Trans., 7556 - 7564 (2010).
- V. Hugenberg, R. Fröhlich, G. Haufe. Oxidative desulfuration-fluorination of thioethers. Application for the synthesis of fluorinated nitrogen containing building blocks. Org. Biomol. Chem. 8, 5682- 5691 (2010).
- B.-H. Xu, G. Kehr, R. Fröhlich, E. Nauha, G. Erker. Zirconocene complexes bearing novel 3-dimethylamino-1,2-dihydropentalene derived ligand complexes. J. Chem. Soc., Dalton Trans., 9973 - 9981 (2010).
- M. Rueping, A. Kunkel, R. Fröhlich. Catalytic Asymmetric Domino Michael-Henry Reaction: Enantioselective Access to Bicycles with Consecutive Quaternary Centers by Using Bifunctional Catalysts. Chem. Eur. J., 16, 4173 – 4176 (2010).
- E. H. Mørkved, T. Andreassen, R. Fröhlich, F. Mo, P. Bruheim. Unsymmetrical zinc azaphthalocyanines, peripherally substituted with thiophen-2-yl and 2-functionalized phenoxy groups. Polyhedron, 29, 3229 – 3237 (2010).
- S. Kirchberg, R. Fröhlich, A. Studer. Synthese von 1,2,3-trisubstituierten Indanen durch diastereoselektive Palladium-katalysierte Oxyarylierung von Indenen mit Arylboron-säuren und Nitroxiden. Angew. Chem., 122, 7029 – 7032 (2010), Angew. Chem. Int. Ed., 49, 6877 – 6880 (2010).
- J. F. Schneider, R. Fröhlich, J. Paradies. Synthesis of Enantiopure Planar-Chiral Thiourea Derivatives. Synthesis, 3486 – 3492 (2010).
- M. Albrecht, M. Fiege, P. Kögerler, M. Speldrich, R. Fröhlich, M. Engeser. Magnetic Coupling in Enantiomerically Pure Trinuclear Helicate-Type Complexes Formed by Hierarchical Self-Assembly. Chem. Eur. J., 16, 8797 – 8804 (2010).
- A. Ghosh, S. M. Mobin, R. Fröhlich, R. J. Butcher, D. K. Maity, M. Ravikanth. Effect of Five Membered Versus Six Membered Meso-Substituents on Structure and Electronic Properties of Mg(II) Porphyrins: A Combined Experimental and Theoretical Study. Inorg. Chem., 49, 8287 – 8297 (2010).
- A. Bruch, A. Ambrosius, R. Fröhlich, A. Studer, D. B. Guthrie, H. Zhang, D. P. Curran. Memory of Axial Chirality in Aryl Radical Phosphanylations. J. Am. Chem. Soc., 132, 11452 – 11454 (2010).
- B.-H. Xu, G. Kehr, R. Fröhlich, G. Erker. Carbon-Carbon Bond Cleavage by Strongly Electrophilic Boranes. Chem. Eur. J., 16, 12538 – 12540 (2010).
- C.-H. Yang, J. Beltran, V. Lemaur, J. Cornil, D. Hartmann, W. Sarfert, R. Fröhlich, C. Bizarri, L. De Cola. Iridium Metal Complexes Containing N-Heterocyclic Carbene Ligands for Blue-Light-Emitting Electrochemical Cells. Inorg. Chem., 49, 9891 – 9901 (2010).
- C. Chen, G. Kehr, R. Fröhlich, G. Erker. Carbon-Carbon Bond Activation by 1,1-Carboboration of Internal Alkynes. . J. Am. Chem. Soc., 132, 13594 – 13595 (2010).
- K. V. Axenov, C. M. Mömming, G. Kehr, R. Fröhlich, G. Erker. Structure and Dynamic Features of an Intramolecular Frustrated Lewis Pair. Chem. Eur. J., 16, 12069 – 14073 (2010).
- S. Das, R. Fröhlich, A. Pramanik. Facile Regioselective Synthesis of 3-amino-2-(2‘-arylindanedionyl)indenones from 2-aryl-2,2‘-biindan-1,1‘,3,3‘-tetrones and Solvent-Dependent Keto-Enol Tautomerism in Enaminones. Lett. Org. Chem., 7, 444 – 449 (2010).
- I. P. Singh Kapoor, M. Kapoor, G. Singh, R. Fröhlich. Synthesis, characterization and thermal decomposition of di-(2,4,6-trimethylanilium) sulphate. Ind. J. Eng. Mat. Sciences, 17, 305 – 310 (2010).
- D. Kumar, I. P. Singh Kapoor, M. Kapoor, G. Singh, R. Fröhlich. X-ray crystallography and thermolysis of ammonium perchlorate and protonated hexamethyltetramine perchlorate prepared by newer methods. Int. J. Energ. Mat.Chem. Propuls., 9, 549 – 560 (2010).
- B.-H. Xu, G. Kehr, R. Fröhlich, S. Grimme, G. Erker. Reaction of the Aminohydro-pentalenes with HB(C6F5)2: The Crucial Role of Dihydrogen Elimination. J. Am. Chem. Soc., 133, 3480 – 3491 (2011).
- O. Ekkert, G. Kehr, R. Fröhlich, G. Erker. P-C-Bond Activation Chemistry: Evidence for 1,1-Carboboration Reactions Proceeding with Phosphorus-Carbon Bond Cleavage. J. Am. Chem. Soc., 133, 4610 – 4616 (2011).
- J. M. Fernandez-Hernandez, C.-H. Yang, J. I. Beltran, V. Lemaur, F. Polo, R. Fröhlich, J. Cornil, L. DeCola. Control of Mutual Arrangements of Cyclometalated Ligands in Cationic Iridium(III) Complexes. Synthesis, Spectroscopy, and Electroluminescence of the Different Isomers. J. Am. Chem. Soc., 133, 10543 – 10558 (2011).
- F. M. Conrady, R. Fröhlich, C. Schulte to Brinke, T. Pape, F. E. Hahn. Stepwise Formation of a Molecular Square with Bridging NH,O-Substituted Dicarbene Building Blocks. J. Am. Chem. Soc., 133, 11496 – 11499 (2011).
- K. Müther, R. Fröhlich, C. Mück-Lichtenfeld, S. Grimme, M. Oestreich. A Unique Transition Metal-Stabilized Silicon Cation. J. Am. Chem. Soc., 133, 12442 – 12444 (2011).
- A. Bruch, R. Fröhlich, S. Grimme, A. Studer, D. P. Curran. One Product, Two Pathways: Initially Divergent Radical Reactions Reconverge to Form a Single Product in High Yield. J. Am. Chem. Soc., 133, 16270 – 16276 (2011).
- C. Chen, T. Voss, R. Fröhlich, G. Kehr, G. Erker. 1,1-Carboboration of 1-Alkynes: A Conceptual Alternative to the Hydroboration Reaction. Org. Letters, 13, 62 – 65 (2011).
- J. Stiller, E. Marques-Lopez, R. P. Herrera, R. Fröhlich, C. Strohmann, M. Christmann. Enantioselective α- and γ-Alkylation of α,β-Unsaturated Aldehydes Using Dienamine Activation. Org. Letters, 13, 70 – 73 (2011).
- U. Hennecke, C. H. Müller, R. Fröhlich. Enantioselective Haloetherification by Asymmetric Opening of meso-Halonium Ions. Org. Letters, 13, 860 – 863 (2011).
- D. J. Vyas, R. Fröhlich, M. Oestreich. Activation of the Si-B Linkage: Copper-Catalyzed Addition of Nucleophilic Silicon to Imines. Org. Letters, 13, 2094 – 2097 (2011).
- A. Biswas, S. De Sarkar, R. Fröhlich. A. Studer. Highly Stereoselective Synthesis of 1,2,3-Trisubstituted Indanes via Oxidative N-Heterocyclic Carbene-Catalyzed Cascades. Org. Letters, 13, 4966 – 4969 (2011).
- T. Kleine, K. Bergander, R. Fröhlich, B. Wibbeling, E.-U. Würthwein. Ring-Closure Reactions of 1,2-Diaza-4,5-benzoheptatrienyl Metal Compounds: Experiment and Theory. J. Org.Chem., 76, 1979 – 1991 (2011).
- Y. Loewer, C. Weiss, A. T. Biju, R. Fröhlich, F. Glorius. Synthesis and Application of a Chiral Diborate. J. Org.Chem., 76, 2324 – 2327 (2011).
- T. Kleine, R. Fröhlich, B. Wibbeling, E.-U- Würthwein. Cyclization Reactions of 3,4-Diazaheptatrienyl Compounds. Pyridines from an Anionic Analogue of the Fischer Indole Synthesis: Experiment and Theory. J. Org.Chem., 76, 4591 – 4599 (2011).
- B. Neue, R. Reiermann, K. Gerdes, R. Fröhlich, B. Wibbeling, E.-U. Würthwein. Ring Closure Reactions of 2,6-Diazaheptatrienyl Metal Compounds: Synthesis of 3-Aminoindole Derivatives and 14-Membered Macrocyclic Dimers. J. Org.Chem., 76, 8794 – 8806 (2011).
- T. Voss, J.-B. Sortais, R. Fröhlich, G. Kehr, G. Erker. Alkene Addition of Frustrated P/B and N/B Lewis Pairs at the [3]Ferrocenophane Framework. Organometallics, 30, 584 – 594 (2011).
- K. Spannhoff, R. Rojas, R. Fröhlich, G. Kehr, G. Erker. Reactions of Topologically Related „nacnacH-CN“ and „P-nacnacH-CN“ Chelate Ligand Systems with HB(C6F5)2. Organometallics, 30, 2377 – 2384 (2011).
- C. Rosorius, G. Kehr, R. Fröhlich, S. Grimme, G. Erker. Electronic Control of Frustrated Lewis Pair Behavior: Chemistry of a Geminal Alkylidene-Bridged Per-pentafluorophenylated P/B Pair. Organometallics, 30, 4211 – 4219 (2011).
- B-H. Xu, G. Kehr, R. Fröhlich, G. Erker. 6-Dimethylaminopentafulvene as a Lewis Base Component in Frustrated Lewis Pairs: Reversible Carbon-Carbon Coupling in FLP Chemistry. Organometallics, 30, 5080 – 5083 (2011).
- R. Liedtke, R. Fröhlich, G. Kehr, G. Erker. Frustrated Lewis Pair Reactions with Bis-Acetylenic Substrates: Exploring the Narrow Gap Separating Very Different Competing Reaction Pathways. Organometallics, 30, 5222 – 5232 (2011).
- C. Chen, T. M. J. Anselment, R. Fröhlich, B. Rieger, G. Kehr, G. Erker. o-Diaryl-phospinoferrocene Sulfonate Palladium Systems for Nonalternating Ethene-Carbon Monoxide Copolymerization. Organometallics, 30, 5248 – 5257 (2011).
- R. S. Rojas, B. C. Peoples, A. R. Cabrera, M. Valderrama, R. Fröhlich, G. Kehr, G. Erker, T. Wiegand, H. Eckert. Synthesis and Structure of Bifunctional Zirconocene/ Borane Complexes and Their Activation for Ethylene Polymerization. Organometallics, 30, 6372 – 6382 (2011).
- S. Schwendemann, R. Fröhlich, G. Kehr, G. Erker. Intramolecular frustrated N/B lewis pairs by enamine hydroboration. Chem. Sci., 2, 1842 – 1849 (2011).
- C. M. Mömming, G. Kehr, R. Fröhlich, G. Erker. The frustrated Lewis pair induced formation of a pentafulvene [6+4] cycloaddition product. Chem. Comm., 47, 2006 – 2007 (2011).
- A. Stute, G. Kehr, R. Fröhlich, G. Erker. Chemistry of a geminal frustrated Lewis pair featuring electron withdrawing C6F5 substituents at both phosphorus and boron. Chem. Comm., 47, 4288 – 4290 (2011).
- O. Ekkert, G.Kehr, R. Fröhlich, G. Erker. Phosphirenium-borate zwitterion: formation in the 1,1-carboboration reaction of phosphinylalkynes. Chem. Comm., 47, 10482 – 10484 (2011).
- F. C. Falk, R. Fröhlich, J. Paradies. Coupling of ortho-substituted aryl chlorides with bulky amides. Chem. Comm., 47, 11095 – 11097 (2011).
- M. Ullrich, R. J. F. Berger, S. Jana, T. Pape, R. Fröhlich, N. W. Mitzel. Organozinc hydroxylamines: on the bulk-dependent interplay of nuclearity, structure and dynamics. J. Chem. Soc., Dalton Trans., 40, 1144 - 1157 (2011).
- K. Unverhau, G. Kehr, R. Fröhlich, G. Erker. Synthesis of [3]ferrocenophane-bridged Cp-amido zirconium complexes and ansa-zirconocene complexes and their use in catalytic polymerisatzion reactions. J. Chem. Soc., Dalton Trans., 40, 3724 - 3736 (2011).
- T. Voss, G. Kehr, R. Fröhlich, G. Erker. Unusual carbamate-directed CH-activation at an annulated ferrocenophane framework. J. Chem. Soc., Dalton Trans., 40, 6984 - 6991 (2011).
- M. Albrecht, E. Isaak, M. Baumert, V. Gossen, G. Raabe, R. Fröhlich. „Induced fit“ in der chiralen Erkennung: Epimerisierung durch Dimerisierung bei der hierachischen Selbstorganisation Helicat-artiger Titan[IV]-Komplexe. Angew. Chem., 123, 2903 – 2906 (2011), Angew. Chem. Int. Ed., 50, 2850 – 2853 (2011).
- L. Radtke, M. Willot, H. Sun, S. Ziegler, S. Sauerland, C. Strohmann, R. Fröhlich, P. Habenberger, H. Waldmann, M. Christmann. Total Synthesis and Biological Evaluation of (-)-Englerin A and B: Synthesis of Analogues with Improved Activity Profile. Angew. Chem., 123, 4084 – 4088 (2011), Angew. Chem. Int. Ed., 50, 3998 – 4002 (2011).
- I. Piel, M. Steinmetz, K. Hirano, R. Fröhlich, S. Grimme, F. Glorius. Hoch asymme-trische NHC-katalysierte Hydroacylierung nichtaktivierter Alkene. Angew. Chem., 123, 5087 – 5091 (2011), Angew. Chem. Int. Ed., 50, 4983 – 4987 (2011).
- B.-H. Xu, G. Kehr, R. Fröhlich, B. Wibbeling, B. Schirmer, S. Grimme, G. Erker. Reaktionen frustrierter Lewis-Paare mit konjugierten Inonen – selektive Hydrierung der Kohlenstoff-Kohlenstoff-Dreifachbindung. Angew. Chem., 123, 7321 – 7324 (2011), Angew. Chem. Int. Ed., 50, 7183 – 7186 (2011).
- A. J. P. Cardenas, B. J. Culotta, T. H. Warren, S. Grimme, A. Stute, R. Fröhlich, G. Kehr, G. Erker. Capture of NO by a Frustrated Lewis pair: A New Type of Persistent N-Oxyl Radical. Angew. Chem., 123, 7709 – 7713 (2011), Angew. Chem. Int. Ed., 50, 7567 – 7571 (2011).
- I. Chatterjee, R. Fröhlich, A. Studer. Herstellung von Isoxazolidinen über enantio-selektive Kupfer-katalysierte Anellierung von 2-Nitrosopyridin mit Allylstannanen. Angew. Chem., 123, 11453 – 11456 (2011), Angew. Chem. Int. Ed., 50, 11257 – 11260 (2011).
- F. Liu, X. Bugaut, M. Schedler, R. Fröhlich, F. Glorius. Entwicklung N-heterocyclischer Carbene: Gleichzeitige Verbesserung von Reaktivität und Enantioselektivität in der asymmetrischen Hydroacylierung von Cyclopropenen. Angew. Chem., 123, 12834 – 12839 (2011), Angew. Chem. Int. Ed., 50, 12626 – 12630 (2011).
- O. Garcia Mancheno, P. Tangen, R. Rohlmann, R. Fröhlich, J. Aleman. Synthesis of Chiral Cyclic Nitrones by Asymmetric Addition of β-Ketosulfones to Nitroalkenes followed by Reductive Cyclization. Chem. Eur. J., 17, 984 – 992 (2011).
- K. Gedrich, M. Heitbaum, A. Notzon, I. Senkovska, R. Fröhlich, J. Getzschmann, U. Mueller, F. Glorius, S. Kaskel. A Family of Chiral Metal-Organic Frameworks. Chem. Eur. J., 17, 2099 – 2106 (2011).
- M. Mewald, R. Fröhlich, M. Oestreich. An Axially Chiral, Electron-Deficient Borane: Synthesis, Coordination Chemistry, Lewis Acidity, and Reactivity. Chem. Eur. J., 17, 9406 – 9414 (2011).
- I. Peuser, R. C. Neu, X. Zhao, M. Ulrich, B. Schirmer, J. A. Tannert, G. Kehr, R. Fröhlich, S. Grimme, G. Erker, D. W. Stephan. CO2 and Formate Complexes of Phosphine/Borane Frustrated Lewis Pairs. Chem. Eur. J., 17, 9640 – 9650 (2011).
- T. Dröge, A. Notzon, R. Fröhlich, F. Glorius. Palladium-Catalyzed C-H Bond Functionalization of a Metal-Organic Framework (MOF): Mild, Selective, and Efficient. Chem. Eur. J., 17, 11974 – 11977 (2011).
- C. Wigbers, J. Prigge, Z. Mu, R. Fröhlich, L. Chi, E.-U. Würthwein. Synthesis, Structure, and Aggregation Properties of N-Acylamidines. Eur. J. Org. Chem., 861 – 877 (2011).
- J. I. Clodt, C. Wigbers, R. Reiermann, R. Fröhlich, E.-U. Würthwein. Synthesis and Aggregation Properties of Two- and Three-Armed Nitrogen-Rich Chelate Ligands. Novel Bis(N-acylamidines), Tris(N-acylamidines) and Bis(triazapentadienes) with Flexible or Rigid Spacers. Eur. J. Org. Chem., 3197 – 3209 (2011).
- I. Piel, M. D. Pawelczyk, K. Hirano, R. Fröhlich, F. Glorius. A Family of Thiazolium Salts Derived N-Heterocyclic Carbenes (NHCs) for Organocatalysis: Synthesis, Investigation and Application in Cross-Benzoin-Condensation. Eur. J. Org. Chem., 5475 – 5484 (2011).
- J. Ugolotti, G. Dierker, R. Fröhlich, G. Kehr, G. Erker. Reactions of bis(alkynyl)silanes with HB(C6F5)2:Formation of boryl-substituted silacyclobutene derivatives. J. Organomet. Chem., 696, 1184 – 1188 (2011).
- G. Lübbe, R. Fröhlich, G. Kehr, G. Erker. Structural variety and stereochemical features of bis(diphenylphosphinyl)[3]ferrocenophane gold(I) complexes. Inorg. Chim. Acta, 369, 223 – 230 (2011).
- J. Hurtado, J. Ugarte, R. Rojas, M. Valderrama, D. Mac-Leod Carey, A. Munoz-Castro, R. Arratia-Perez, R. Fröhlich. New bis(azolylcarbonyl)pyridine chromium(III) complexes as initiators for ethylene polymerization. Inorg. Chim. Acta, 378, 218 – 223 (2011).
- E. Rack, R. Fröhlich, D. Schepmann, B. Wünsch. Design, synthesis and pharmacolo-gical evaluation of spirocyclic σ1 receptor ligands with exocyclic amino moiety (increased distance 1). Bioorg. Med. Chem., 19, 3141 – 3151 (2011).
- K. Ghosh, S. Adhikari, R. Fröhlich, I. D. Petsalakis, G. Theodorakopoulos. Experimental and theoretical anion binding studies in coumarin linked thiourea and urea molecules. J. Mol. Struc., 1004, 193 – 203 (2011).
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- J. Hurtado, A. Ibanez, R. Rojas, M. Valderrama, R. Fröhlich. Organonickel(II) complexes with Anionic Tridentate 1,3-Bis(azolylmethyl)phenyl Ligands. Synthesis, Structural Characterization and Catalytic Behavior. J. Braz. Chem. Soc., 22, 1750 – 1757 (2011).
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- C. Schulz, S. Nowak, R. Fröhlich, B.J. Ravoo. Colvalent Layer-by-Layer Assembly of Redox Active Molecular Multilayers on Silicon (100) by Photochemical Thiol-Ene Chemistry. Small, 8, 569 – 577 (2012).
- R. S. Rojas, A. R. Cabrera, B. C. Peoples, K. Spannhoff, M. Valderrama, R. Fröhlich, G. Kehr, G. Erker. Synthesis of [(π-cyano-P-nacnac)Cp] and [(π-cyano-nacnac)Cp]-zirconium complexes, and their remote activity for ethylene polymerization. J. Chem. Soc., Dalton Trans., 41, 1243 - 1251 (2012).
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- R. C. Samanta, B. Maji, S. De Sarkar, K. Bergander, R. Fröhlich, C. Mück-Lichtenfeld, H. Mayr, A. Studer. Nukleophile Addition von Enolen und Enaminen an α,β-unge-sättigte Acylazoliumionen: Mechanistische Studien. Angew. Chem., 124, 5325 – 5329 (2012), Angew. Chem. Int. Ed., 51, 5234 – 5238 (2012).
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- J. I. Clodt, R. Fröhlich, M. Eul, E.-U. Würthwein. Metallomacrocyclic Complexes by Self-Assembly of NiII and CuII Ions and Chelating Bis(N-acylamidines). Eur. J. Inorg. Chem., 1210 – 1217 (2012).
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- A. Feldmann, A. Iida, R. Fröhlich, S. Yamaguchi, G. Kehr, G. Erker. Preparation of Dihydroborole Derivatives by a Simple 1,1-Carboboration Route. Organometallics, 31, 2445 – 2451 (2012).
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- P. M. Selvakumar, S. Nadella, R. Fröhlich, M. Albrecht, P. S. Subramanian. A new class of solvatochromic material: Geometrically unsaturated Ni (II) complexes. Dyes and Pigments, 95, 563 – 571 (2012).
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- I. S. Kondratov, V. G. Dolovanyuk, N. A. Tolmachova, I. I. Gerus, K. Bergander, R. Fröhlich, G. Haufe. Reactions of β-alkoxyvinyl polyfluoroalkyl ketones with ethyl isocyanoacetate and its use for the synthesis of new polyfluoroalkyl pyrroles and pyrrolidines. Org. Biomol. Chem., 10, 8778 – 8785 (2012).
- S. Sakar, S. Masood Husain, D. Schepmann, R. Fröhlich, B. Wünsch. Microwave assisted synthesis of 3-benzazepin-2-ones as building blocks for 2,3-disubstituted tetrahydro-3-benzazepines. Tetrahedron, 68, 2687 – 2695 (2012).
- C. Lohre, C. Nimphius, M. Steinmetz, S. Würtz, R. Fröhlich, C. G. Daniliuc, S. Grimme, F. Glorius. Investigation of the complexation behaviour and catalysis of IBiox-[(-)-menthyl].HOTf. Tetrahedron, 68, 7636 – 7644 (2012).
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- K.-O. Feldmann, R. Fröhlich, J. J. Weigand. Access to catenated and branched poly- phosphorus ligands and coordination complexes via a tri(pyrazolyl)phosphane. Chem. Comm., 48, 4296 – 4298 (2012).
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- S. Nadella, P. M. Selvakumar, E. Suresh, P. S. Subramanian, M. Albrecht, M. Giese, R. Fröhlich. Lanthanide(III) Complexes of Bis-semicarbazone and Bis-imine-Substituted Phenanthroline Ligands: Solid-State Structures, Photophysical Properties, and Anion Sensing. Chem. Eur. J., 18, 16784 – 16792 (2012).
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- T. Holtrichter-Rößmann, C. Rösener, J. Hellmann, W. Uhl, E.-U. Würthwein, R. Fröhlich, B. Wibbeling. Generation of Weakly Bound Al-N Lewis Pairs by Hydro-alumination of Ynamines and the Activation of Small Molecules: Phenylethyne and Dicyclohexylcarbodiimide. Organometallics, 31, 3272 – 3283 (2012).
- R. Narayan, R. Fröhlich, E.-U. Würthwein. Synthesis of Pyrroles through a 4π-Electro-cyclic Ring-Closure Reaction of 1-Azapentadienyl Cations. J. Org. Chem., 77, 1868 – 1879 (2012).
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- C. Grohmann, T. Hashimoto, R. Fröhlich, Y. Ohki, K. Tatsumi, F. Glorius. An Iron(II) Complex of a Diamine-Bridged Bis-N-Heterocyclic Carbene. Organometallics, 31, 8047 – 8050 (2012).
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- F. W. Patureau, T. Besset, R. Fröhlich, F. Glorius. On the selectivity in some Rh(III) catalyzed C-H activation cross-couplings. Comp. R. Chimie, 15, 1081 – 1085 (2012).
- K. Nagura, S. Saito, R. Fröhlich, F. Glorius, S. Yamaguchi. N-Heterocyclic Carbene Boranes as Electron-Donating and Electron-Accepting Components of π-Conjugated Systems. Angew. Chem., 124, 7882 – 7886 (2012), Angew. Chem. Int. Ed., 51, 7762 – 7766 (2012).
- H. Richter, R. Fröhlich, C. G. Daniliuc, O. Garcia Mancheño. Milde metallfreie Tandem-α-Alkylierung/Cyclisierung von N-Benzylcarbamaten mit einfachen Olefinen. Angew. Chem., 124, 8784 – 8788 (2012), Angew. Chem. Int. Ed., 51, 8656 – 8660 (2012).
- P. Feldhaus, B. Schirmer, B. Wibbeling, C. G. Daniliuc, R. Fröhlich, S. Grimme, G. Kehr, G. Erker. Frustrated Lewis pair addition to conjugated diynes: Formation of zwitterionic 1,2,3-butatriene derivatives. J. Chem. Soc., Dalton Trans., 41, 9135 - 9142 (2012).
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- W. Nie, H. F. T. Klare, M. Oestreich, R. Fröhlich, G. Kehr, G. Erker. Reversible Heterolytic Si-H Bond Activation by an Intramolecular Frustrated Lewis Pair. Z. Naturforsch., 67b, 987 – 994 (2012).
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- S. Kumar Podiyanachari, R. Fröhlich, C. G. Daniliuc, J. L. Petersen, G. Kehr, G. Erker, N. Suzuki, S. Yuasa, K, Hagimori, S. Inoue, T. Asada, T. Takemoto, Y. Masuyama. Facile formation of five-membered N-heterocyclic zirconacycloallenoids. J. Chem. Soc., Dalton Trans., 41, 10811 - 10816 (2012).
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- M. B. Lauber, R. Fröhlich, J. Paradies. Development of Tartaric Acid Derived Hydrogen-Bond Donors. Synthesis, 44, 3209 – 3215 (2012).
- S. Shit, U. Yadava, D. Saha, R. Fröhlich. 2,2´-Bipyridyl-acetylphenolato mixed ligand copper(II) complexes: syntheses, characterizations and catalytic activity in styrene epoxidation. J. Coord. Chem., 66, 66 - 76 (2013).
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- M. A. Escobar, D. H. Jara, R. A. Tapia L. Lemus, R. Fröhlich, J. Guerrero, R. S. Rojas. Copper(I) complexes bases on a new indazol-4,7-ligand. Polyhedron, 62, 66 – 74 (2013).
- M.-K. Lemke, P. Schwab, P. Fischer, S. Tischer, M. Witt, L. Noehringer, V. Rogachev, A. Jäger, O. Kataeva, R. Fröhlich, P. Metz. Ein praktischer Zugang zu hoch enantio-merenreinen Flavanonen durch katalytische asymetrische Transferhydrierung. Angew. Chem., 125, 11865 – 11869 (2013), Angew. Chem. Int. Ed., 52, 11651 – 11655 (2013).
- K. Ghosh, D. Kar, R. Fröhlich, A. P. Chattopadhyay, A. Samadder, A. R. Khuda-Bukhsh. O-tert-Butyldiphenylsilyl coumarin and dicoumarol: a case towards selective sensing of F- ions in organic and aqueous environments. Analyst, 138, 3038 – 3045 (2013).
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- C. Glotzbach, U. Kauscher, J. Voskuhl, N. S. Kehr, M. C. A. Stuart, R. Fröhlich, H. J. Galla, B. J. Ravoo, K, Nagura, S. Saito, S. Yamaguchi, E.-U. Würtwein. Fluorescent Modular Boron System based on NNN- and ONO-Tridentate Ligands: Self-Assembly and Cell Imaging. J. Org. Chem., 78, 4410 – 4418 (2013).
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- N. Darmawan, C.-H. Yang, M. Mauro, R. Fröhlich, L. De Cola, C.-H. Chang, Z.-J. Wu, C.-W. Tai. Highly efficient blue and deep-blue emitting zwitterionic. J. Mater. Chem. C., 2, 2569 -2582 (2014).
- J. Möbus, G. Kehr, C. G. Daniliuc, R. Fröhlich, G. Erker. Borata-alkene derivatives conveniently made by frustrated Lewis pair chemistry. J. Chem. Soc., Dalton Trans., 43, 632 - 638 (2014).
- J. Möbus, K. Malessa, H. Frisch, C. G. Daniliuc, R. Fröhlich, G. Kehr, G. Erker. Zwitterionic Phosphirenium Borates Derived from Bis(alkynyl)mesityl Phosphanes and Tris(pentafluorophenyl)borane. Heteroatom Chem., 25, 396 – 401 (2014).
- T. Wiegand, H. Eckert, J. Ren, G. Brunklaus, R. Fröhlich, C. G. Daniliuc, G. Lübbe, K. Bussmann, G. Kehr, G. Erker, S. Grimme. Indirect „No-Bond“ 31P…31P Spin-Spin Couplings in P,P-[3]Ferrocenophanes: Insights from Solid-State NMR Spectroscopy and DFT Calculations. J. Phys. Chem. A, 118, 2316 – 2331 (2014).
- P. Feldhaus, B. Wibbeling, R. Fröhlich, C. G. Daniliuc, G. Kehr, G. Erker. Formation of Allenes by 1,4-Addition of Intermolecular Phosphane/Borane Frustrated Lewis Pairs to a Conjugated Enyne. Synlett, 25, 1529 – 1533 (2014).
- S. Asmus, S. Beckendorf, M. Zurro, C. Mück-Lichtenfeld, R. Fröhlich, O. García Mancheno. Influence of the Substitution and Conformation of C-H-Bond-Based Bis-Triazole Acceptors in Anion-Binding Catalysis. Chem. Asian J., 9, 2178 – 2186 (2014).
- M. Marhold, C. Stillig, R. Fröhlich. G. Haufe. Ring-Closing Metathesis of Vinyl Fluori-des towards α-Fluorinated α,β-Unsaturated Lactams and Lactones. Eur. J. Org. Chem., 5777 – 5785 (2014).
- M. Albrecht, E. Isaak, V. Moha. G. Raabe, R. Fröhlich. Stereocontrol in Dinuclear Triple Lithium-Bridged Titanium(IV) Complexes: Solving Some Stereochemical Mysteries. Chem. Eur. J., 20, 6650 – 6658 (2014).
- M. Albrecht, E. Isaak, H. Shigemitsu, V. Moha, G. Raabe, R. Fröhlich. Terpenols as substituents for the diastereoselective formation of enantiomerically pure triple lithium-bridged helicate type-coordination compounds. J. Chem. Soc., Dalton Trans., 43, 14636 - 14643 (2014).
- P. Hasebein, B. Frehland, K. Lehmkuhl, R. Fröhlich, D. Schepmann, B. Wünsch. Synthesis and pharmacological evaluation of like- and unlike-configured tetrahydro-2-benzazepines with the α-substituted benzyl moiety in the 5-position. Org. Biomol. Chem., 12, 5407 – 5426 (2014).
- R. J. F. Berger, S. Jana, R. Fröhlich, N. W. Mitzel. A diethylhydroxylaminate bases mixed lithium/beryllium aggregate. Z. Naturforsch., 70b, 279 – 282 (2015).
- J. Fröhlich, K. Lehmkuhl, R. Fröhlich. B. Wünsch. Diastereoselective Synthesis of Cyclic Five-Membered trans,trans-Configured Nitrodiols by Double Henry Reaction of 1,4-Dialdehydes. Arch. Pharm. Chem. Life Sci., 348, 589 – 594 (2015).
- M. P. Quick, R. Fröhlich, D. Schepmann, B. Wünsch. Asymmetric synthesis of 3-substituted tetrahydro-2-benzazepines. Org. Biomol. Chem., 13, 7265 – 7281 (2015).
- J. Nitsch, C. Kleeberg, R. Fröhlich, A. Steffen. Luminescent copper(I) halide and pseudohalide phenanthroline complexes revisited: simple structures, complicated excited state behavior. J. Chem. Soc., Dalton Trans., 44, 6944 - 6960 (2015).
- P. Molenveld, R. Bouzanne des Mazery, G. J. Sterk, R. P. M. Storcken, R. Autar, B. van Oss, R. N. S. van der Haas, R. Fröhlich, D. Schepmann, B. Wünsch, M. Soeberdt. Con-formationally restricted κ-opioid receptor agonists: Synthesis and pharmacological evaluation of distereoisomeric and enantiomeric decahydroquinoxalines. Bioorg. Med. Chem. Letters, 25, 5326 – 5330 (2015).
- C. Glotzbach, N. Gödecke, R. Fröhlich, C. G. Daniliuc, S. Saito, S. Yamaguchi, E.-U. Würthwein. Fluorescent benzene-centered mono-, bis- and tris-triazapentadiene-boron complexes. J. Chem. Soc., Dalton Trans., 44, 9659 - 9671 (2015).
- X. Jin, M. Willeke, R. Lucchesi, C. G. Daniliuc, R. Fröhlich, B. Wibbeling, W. Uhl, E.-U. Würthwein. Hydroaluminationof ketenimines and Subsequent Reactions with Heterocumulenes: Synthesis of Unsaturated Amide Derivatives and 1,3-Diimines. J. Org. Chem., 80, 6062 – 6075 (2015).
- B. Tewes, B. Frehland, R. Fröhlich, B. Wünsch. Crystal structure of (1S*,2R*)-7-benzyloxy-2-methyl-3-tosyl-2,3,4,5-tetrahydro-1H-3-benzazepin-1-ol: elucidation of the relative configuration of potent allosteric GluN2B selective NMDA receptor antagonists. Acta Cryst., E72, 683 – 686 (2016).
- B. Tewes, B. Frehland, R. Fröhlich, B. Wünsch. Novel GluN2B selective NMDA receptor antagonists: relative configuration of 7-methoxy-2-methyl-2,3,4,5-tetrahydro-1H-3-benzazepin-1-ols. Acta Cryst., E72, 683 – 686 (2016).
- R. K. Schmidt, H. F. T. Klare, R. Fröhlich, M. Oestreich. Planar Chiral, Ferrocene-Sta-bilized Silicon Cations. Chem. Eur. J., 22, 5376 – 5383 (2016).
- M. Schubert, K. Wehming, A. Kehl, M. Nieger, G. Schnakenburg, R. Fröhlich, D. Schollmeyer, S. R. Waldvogel. Molybdenum Pentachloride Mediated Synthesis of Spirocyclic Compounds by Intramolecular Oxidative Coupling. Eur. J. Org. Chem., 60 – 63 (2016).
- A. J. Wrobel, R. Lucchesi, B. Wibbeling, C. G. Daniliuc, R. Fröhlich, E.-U. Würthwein. 1,3,5-Triazapentadienes by Nucleophilic Addition to 1,3- and 1,4-Dinitriles – Sterically Constrained Examples by Incorporation into Cyclic Peripheries: Synthesis, Aggregation, and Photophysical Properties. J. Org. Chem., 81, 2849 – 2863 (2016).
- Y. Sun, V. Lemaur, J. I. Beltrán, J. Cornil, J. Huang, J. Zhu, Y. Wang, R. Fröhlich, H. Wang, L. Jiang, G. Zou. Neutral Mononuclear Copper(I) Complexes: Synthesis, Crystal Structures, and Photophysical Properties. Inorg. Chem., 55, 5845 – 5852 (2016).
- T. Holtrichter-Rößmann, I. Häger, C. G. Daniliuc, R. Fröhlich, K. Bergander, C. Troll, B. Rieger, R. S. Rojas, E.-U. Würthwein. Catalytically Active N-Acylamidine-Zirco-nium Complexes. Synthesis, Structures, and Application in Ethylene Polymerization. Organometallics, 35, 1906 – 1915 (2016).
- C. Bizzarri, C. Fléchon, O. Fenwick, F. Cacialli, F. Polo, M. D. Gálvez-López, C.-H. Yang, S. Scintilla, Y. Sun, R. Fröhlich, L. De Cola. Luminescent Neutral Cu(I) Complexes: Synthesis, Characterization and Application in Solution-Processed OLED. ECS J. Sol. State Sci. Tech., 5, R83 – R90 (2016).
- J. Hurtado, N. Nunez-Dallos, S. Movilla, G. P. Miscione, B. C. Peoples, R. Rojas, M. Valderrama, R. Fröhlich. Chromium(III) complexes bearing bis(benzotriazoyl)pyridine ligands: synthesis, characterization and ethylene polymerization behavior. J. Coord. Chem., 70, 803 - 818 (2017).
- M. C. Letzel, H. J. Schäfer, R. Fröhlich. Diastereoselective anodic hetero- and homo-coupling of menthol-, 8-methylmenthol- and 8-phenylmentho-2-alkylmalonates. Beilstein J. Org. Chem., 13, 33 – 42 (2017).
- T.-D. J. Stumpf, M. Steinbach, C. Würtele, J. Becker, S. Becker, R. Fröhlich, R. Göttlich, S. Schindler. Reactivity of Copper Complexes with Bis(piperidinyl)methane and Bis(quinolinyl)methane Ligands. Eur. J. Inorg. Chem., 4246 – 4258 (2017).
- A. Basoglu, S. Dirkmann, N. Zahedi Golpayegani, S. Vortherms, J. Tentrop, D. Nowottnik, H. Prinz, R. Fröhlich, K. Müller. Oxadiazole-substituted naphtho[2,3-b] thiophene-4,9-diones as potent inhibitors of keratinocyte hyperproliferation. Structure-activity relationships of the triclinic quinone skeleton and the oxadiazole substituent. Eur. J. Med. Chem., 134, 119 – 132 (2017).
- J. Eberhard, K. Peuntinger, R. Fröhlich, D. M. Guldi, J. Mattay. Synthesis and Properties of Acridine and Acridinium Dye Functionalized Bis(terpyridine) Ruthenium(II) Complexes. Eur. J. Org. Chem., 2682 – 2700 (2018).
- T.-D. J. Stumpf, M. Steinbach, M. Höltke, G. Heuger, F. Grasemann, R. Fröhlich, S. Schindler, R. Göttlich. C- Bridged Bispyrrolidines and Bispiperidines as New Ligands. Eur. J. Org. Chem., 5538 – 5547 (2018).
- X. Chen, M. Baumert, R. Fröhlich, M. Albrecht. Cation triggered spring-like helicates based on ketone-substituted bis-catechol ligands. J. Incl. Phenom. Macrocycl. Chem., 94, 133 – 140 (2019).
- S. Adhikari, D. Kar, R. Fröhlich, K. Gosh. Pyridine-Based Macrocyclic and Open Receptors for Urea. ChemistrySelect, 4, 12825 – 12831 (2019).
- A. C. N. Kwamen, M. Schlottmann, D. Van Craen, E. Isaak, J. Baums, L. Shen, A. Massomi, C. Räuber, B. P. Joseph, G. Raabe C. Göb, R. Puttreddy, J. S. Ward, K. Rissanen, R. Fröhlich, M. Albrecht. Shedding Light on the Interactions of Hydrocarbon Ester Substituents upon Formation of Dimeric Titanium(IV) Triscatecholates in DMSO Solution. Chem. Eur. J., 26, 1396 – 1405 (2020).
- E. Longhi, J. M. Fernandez-Hernandez, A. Iordache, R. Fröhlich, H.-P. Josel, L. De Cola. Ir(III) Cyclometalated Complexes Containing Phenylphenanthridine Ligands with Different Substitutions: Effects on the Electrochemiluminescence Properties. Inorg. Chem., 59, 7435 – 7443 (2020).