NMR - Organisch-Chemisches Institut

2008:

• "Linear copolymeric poly(thia-alkanedioates) by lipase-catalyzed esterification and transesterification of 3,3-thiodipropionic acid and its dimethyl ester with a,w-alkanediols", E. Fehling, E. Klein, K. Vosmann, K. Bergander, N. Weber, Biotechnology and Bioengineering 2008, 99(5), 1074-1084.

• "Asymmetric total synthesis and X-ray crystal structure of the cytotoxic marine diterpene (+)-vigulariol.", J. Becker, K. Bergander; R. Frohlich, D. Hoppe, Angewandte Chemie (International ed. in English) 2008, 47(9), 1654-7.

• "Highly enantioselective reactions of configurationally labile epimeric diamine complexes of lithiated S-benzyl thiocarbamates.", H. Lange, K. Bergander, R. Frohlich; S. Kehr; S. Nakamura, N. Shibata, T. Toru, D. Hoppe, Chemistry, an Asian journal 2008, 3(1), 88-101.

 

2007:

• "Rapid intramolecular heterolytic dihydrogen activation by a four-membered heterocyclic phosphane-borane adduct.", P. Spies, G. Erker, G. Kehr, K. Bergander; R. Froehlich; S. Grimme; W. Douglas, Chemical Communications (Cambridge, United Kingdom) 2007, (47), 5072-5074.

• "D-Glucosamine trimethylene dithioacetal derivatives: formation of six- and seven-membered ring amino carbasugars. Synthesis of (-)-calystegine B3", Y.-L. Chen, H. Redlich, K. Bergander, R. Froehlich, Organic & Biomolecular Chemistry 2007, 5(20), 3330-3339.

• "Identification of Bitter Off-Taste Compounds in the Stored Cold Pressed Linseed Oil", L. Bruehl, B. Matthaeus, E. Fehling, B. Wiege, B. Lehmann, H. Luftmann, K. Bergander, K. Quiroga, A. Scheipers, O. Frank, T. Hofmann, Journal of Agricultural and Food Chemistry 2007, 55(19), 7864-7868.

• "Highly diastereoselective lithiation and substitution of an (S)-prolinyl thiocarbamate via sterically homogeneous lithio(thiocarbamate): synthesis of enantiomerically pure prolinethiols.", R. P. Sonawane, C. Mueck-Lichtenfeld, R. Froehlich, K. Bergander, D. Hoppe, Chemistry--A European Journal 2007, 13(22), 6419-6429, S6419/1-S6419/13.

• "Novel Synthesis of Azepine Derivatives via Copper-Mediated Cyclization of 2-Aza-hepta-2,4-dien-6-ynyl Anions. Intramolecular Addition of Organocopper Centers to the C-C Triple Bond.", V. Lyaskovskyy; K. Bergander, R. Froehlich, E.-U. Wuerthwein, Organic Letters 2007, 9(6), 1049-1052.

 

2006:

• "Formation of an organometallic ladderane derivative by dynamic topochemical reaction control.", J. Paradies, I. Greger; G. Kehr, G. Erker, K. Bergander, R. Froehlich, Angewandte Chemie, International Edition 2006, 45(45), 7630-7633.

• "Copolymeric polythioesters by lipase-catalyzed thioesterification and transthioesterification of , -alkanedithiols.", N. Weber, K. Bergander, E. Fehling, E. Klein, K. Vosmann; K. D. Mukherjee, Applied Microbiology and Biotechnology 2006, 70(3), 290-297.

• "Organoaluminium complexes with sterically demanding oximato ligands: does a bulky and rigid ligand backbone change the aggregation motif? ", M. Ullrich, N. W. Mitzel, K. Bergander, R. Froehlich.", Dalton Transactions 2006, (5), 714-721.

 

2005:

• "Facile and highly diastereoselective formation of a novel pentacyclic scaffold by direct anodic oxidation of 2,4-dimethylphenol.", I. M. Malkowsky, C. E. Rommel, K. Wedeking, R. Froehlich, K. Bergander, M. Nieger, C. Quaiser, U. Griesbach, H. Puetter, S. R. Waldvogel, European Journal of Organic Chemistry 2005, Volume Date 2006, (1), 241-245.

• "Asymmetric synthesis of -fluorinated -amino acid derivatives." D. M. Shendage, R. Froehlich, K. Bergander, G. Haufe, European Journal of Organic Chemistry 2005, (4), 719-727.

• "N,N-Diisopropylaminomethyllithium: Synthesis, Oxidative Degradation, and Organoaluminum and -gallium Derivatives.", X. Tian, M. Woski, C. Lustig, T. Pape, R. Froehlich, D. Le Van, K. Bergander, N. W. Mitzel, Organometallics 2005, 24(1), 82-88.

 

2004:

• "Structural and Spectroscopic Evidence for Intramolecular Agostic M···H-C and Dative Zr?F-C(ortho) Interactions in the Zwitterionic 4 Metal Complexes, [(C5H4)SiMe2(N-t-Bu)]M(+)( -C4H6)B(-)(C6F5)3, M = Ti, Zr", F. Hannig, R. Fröhlich, K. Bergander, G. Erker, J. L. Petersen, Organometallics 2004, 23, 4495-4502.

• "A neutral tungsten- 2-alkyne-1-thio ligand forming a homoleptic Werner type complex with Cu(I).", W. W. Seidel, M. D. Ibarra; M. Schaffrath, K. Bergander, Dalton Transactions 2004, (14), 2053-2054.

 

2003:

• "Tris(pentafluorophenyl)borane adducts of substituted imidazoles: conformational features and chemical behavior upon deprotonation", D. Vagedes, G. Erker, G. Kehr, K. Bergander, O. Kataeva, R. Fröhlich, S. Grimme, C. Mück-Lichtenfeld, Dalton Trans. 2003, 1337-1344.

• "Synthesis and Dynamic Features of (Chloro)zirconocene Cations Stabilised by Pendant (Diarylphosphanyl)alkyl and (Dimethylamino)alkyl Substituents at their Cyclopentadienyl Ring Systems", S. Döring, V. V. Kotov, G. Erker, G. Kehr, K. Bergander, O. Kataeva, R. Fröhlich, Eur. J. Inorg. Chem. 2003, 1599-1607.

• "Synthesis and Characterization of Enantiomerically Pure Menthylamines and Their Isocyanates" M.C. Schopohl, K. Bergander, O. Kataeva, R. Fröhlich, S. R. Waldvogel, Synthesis 2003, 17, 2689-2694.

• "The O-substitution Pattern of the MoCl5-Mediated Oxidative Aryl-Aryl Coupling Reaction", B. Kramer, R. Fröhlich, K. Bergander, S.R. Waldvogel, Synthesis 2003, 1, 91-96.

• "Comparative enantioseparations with native beta-cyclodextrin, randomly acetylated beta-cyclodextrin and heptakis-(2,3-di-O-acetyl)-beta-cyclodextrin in capillary electrophoresis.", B. Chankvetadze, K. Lomsadze, N. Burjanadze, J. Breitkreutz, G. Pintore, M. Chessa, K. Bergander, G. Blaschke, Electrophoresis 2003, 24(6), 1083-1091.

2002:

• "Conformational features of a furyl-substituted bis(tetrahydroindenyl)zirconium dichloride system", T. Dreier, F. Hannig, G. Erker, K. Bergander, R. Fröhlich, Cavtat Conference, special volume, zur Publikation eingereicht.

• "Comparative enantioseparations with native beta-cyclodextrin and heptakis-(2-O-methyl- 3,6-di-O-sulfo)-beta-cyclodextrin in capillary electrophoresis.", B. Chankvetadze, N. Burjanadze, D. M. Maynard, K. Bergander, D. Bergenthal, G. Blaschke, Electrophoresis 2002, 23(17), 3027-34.

• "Enantioseparation of glutethimide and its 5-OH-metabolite in capillary electrophoresis and study of selector-selectand interactions using 1D-ROESY spectrometry.", B. Chankvetadze, N. Burjanadze, K. Bergander, G. Blaschke, Electrophoresis 2002, 23(12), 1906-1911.

• "Chelate Complexes of Functionalized Cycloheptatrienyl Ligands: 17- and 18-Electron Molybdenum Complexes with Linked Cycloheptatrienyl-Phosphane Ligands and Their Use in Transition Metal Catalysis, M. Tamm, K, Baum, T. Lügger, R. Fröhlich, K. Bergander, Eur. J. Inorg. Chem. 2002, 918-928.

 

2001:

• "Mechanistic study on the opposite migration order of clenbuterol enantiomers in capillary electrophoresis with ß-cyclodextrin and single-isomer heptakis(2,3-diacetyl)-ß-CD", B. Chankvetadze, K. Lomsadze, D. Bergenthal, J. Breitkreutz, K. Bergander, G. Blaschke, Electrophoresis 2001, 22(15), 3178-3184.

• "Structural and Dynamic Features of Bis[2-(2-furyl)indenyl]zirconium Derivatives", T. Dreier, K. Bergander, E. Wegelius, R. Fröhlich, G. Erker, Organometallics 2001, 20, 5067-5075.

• "The Development of Single Component Metallocene Betaine Ziegler-Natta Catalysts and Related Systems", B. Temme, J. Karl, M. Dahlmann, K. Bergander, G. Kehr, H. Luftmann, R. Fröhlich, T. Jödicke, G. Erker, in Advances on Organometallic Catalysts and Olefin Polymerization in China and Germany, Ed. J. Sun, C. Janiak, Chemical Industry Press, Beijing, China, 2001, S. 82-93.

• "Mechanistic study on the opposite migration order of clenbuterol enantiomers in capillaryelectrophoresis with ß-cylodextrin and single-isomer heptakis(2,3-diacetyl-6-sulfo)-ß-cylodextrin", B. Chankvetadze, K. Lomsadze, D. Bergenthal, J. Breitkreutz, K. Bergander, G. Blaschke, Electrophoresis 2001, 22, 3178-3184.

• "Biosynthesis of Poly(3-hydroxybutyrate-co-3-mercaptobutyrate) as a Sulfur Analogue to Poly(3-hydroxybutyrate) PHB", T. Lütke-Eversloh, K. Bergander, H. Luftmann, A. Steinbüchel, Biomacromolecules 2001, Vol 2, No. 3, 1061-1065.

• "Organic Synthesis via Transition Metal Complexes. 112. Reactivity Enhancement of Group VI Fischer Carbene Complexes by Copper and Rhodium Catalysts: Experimental Proof of a Carbene Rhodium Complex as an Intermediate", I. Göttker-Schnetmann, R. Aumann, K. Bergander, Organometallics, 2001, 20, 3574-3581.

• "Identification of a new class of biopolymer: bacterial synthesis of a sulfur-containing polymer with thioester linkages", T. Lütke-Eversloh, K. Bergander, H. Luftmann, A. Steinbüchel, Microbiology 2001, 147, 11-19.

• "Phytotoxic chaetoglobosins are produced by the plant pathogen Calonectria morganii", C. v. Wallbrunn, H. Luftmann, K. Bergander, F. Meinhardt, J. Gen. Appl. Microbiol., 2001, 47, 33-38.

 

2000:

• "2-[Ethyl-(2-methallyl)amino]indenyllithium: Structural Characterization of a Base-Free Oligomeric Supersandwich Indenylltihium Compound", J.-L. Fauré, G. Erker, R. Fröhlich, K. Bergander, Eur. J. Inorg. Chem. 2000, 2603-2606.

• "Experimental Characterization of the Alkene-Addition/-Insertion Energy Profile at Homogeneous Group 4 Metal Ziegler-Type", M. Dahlmann, G. Erker, K. Bergander, J. Am. Chem. Soc. 2000, 122, 7986-7998.

• "Complexes containing the heptadentate cogwheel C7Me7: synthesis and structural characterization of heptamethylcycloheptatrienyl (CHT*) tungsten complexes", M. Tamm, B. Dreßel, R. Fröhlich, K. Bergander, Chem. Commun. 2000, 1731-1732.

• "Mechanistic study of opposite migration order of dimethindene enatiomers in capillary electrophoresis in the presence of native ß-cylodextrin and heptakis(2,3,6-tri-O-methyl)-ß-cyclodextrin", B. Chankvetadze, G. Pintore, N. Burjanadze, D. Bergenthal, K. Bergander, J. Breitkreuz, Ch. Mühlenbrock, G. Balschke, J. Chromatogr. 2000, 875, 455-469.

• "Separation of brompheniramine enantiomers by capillary electrophoresis and study of chiral recognition mechanisms of cyclodextrins using NMR-spectroscopy, UV spectrometry, electrospray ionization mass spectrometry and X-Ray crystallography", B. Chankvetadze, N. Burjanadze, G. Pintore, D. Bergenthal, K. Bergander, Ch. Mühlenbrock, J. Breitkreuz, G. Balschke, J. Chromatogr. 2000, 875, 471-484.

• "Enantioseparation of Aminoglutethimide with Cyclodextrins in Capillary Electrophoresis and Studies of Selector-Selectand Interactions Using NMR Spectroscopy and Electrospray Ionization Mass Spectrometry", B. Chankvetadze, M. Fillet, N. Burjanadze, D. Bergenthal, K. Bergander, H. Luftmann, J. Crommen, G. Blaschke, Enantiomer 2000, 5, 313-322.

 

1999:

• "Zirconium-Borat-Betaine: Synthese ungewöhnlicher Aromaten und die Entwicklung neuer Katalysatorsysteme", Gerhard Erker, Bodo Temme, Wolfgang Ahlers, Jörn Karl, Marc Dahlmann, Klaus Bergander, Roland Fröhlich, Siegener Universitäts-Reden, Band zur Ehrenpromotion Vogel 5.11.1997, im Druck.

• "Group-4 Metallocene Cation Complexes of Oligopeptides: Reaction of [Cp2ZrCH3(THF)+BPh4-] with Boc-Protected Di- and Tripeptide Esters", J. Wonnemann, M. Oberhoff, G. Erker, R. Fröhlich, K. Bergander, Eur. J. Inorg. Chem. 1999, 1111-1120.

• "Group 5 Metal Complexes with Cyclooctatetraene: Formation and Characterization of (Butadiene)(cyclooctatetraene)(cyclopentadienyl)tantalum Systems", H. C. Strauch, K. Bergander, G. Kehr, R. Fröhlich, G. Erker, Eur. J. Inorg. Chem. 1999, 1461-1466.

• "Diels-Alder Adducts of C-60 and Resin Acid Derivatives: Synthesis, Electrochemical and Fluorescence Properties", B. Gigante, C. Santos, T. Fonseca, M. J. M. Curto, H. Luftmann, K. Bergander, M. N. Berberan-Santos, Tetrahedon 1999, 55, 6175.

• "Arriving at an Experimental Estimate of the Intrinsic Activation Barrier of Olefin Insertion into the Zr-C Bond of an Active Metallocene Ziegler Catalyst.", J. Karl, M. Dahlmann, G. Erker, K. Bergander,[Erratum to document cited in CA129:16421] Journal of the American Chemical Society 1999, 121(20), 4930.

 

1998:

• "Reaction of the Lewis Acid Tris(pentafluorophenyl)borane with a Phosphorus Ylide: Competition between Adduct Formation and Electrophilic and Nucleophilic Aromatic Substitution Pathways", S. Döring, G. Erker, R. Fröhlich, O. Meyer, K. Bergander, Organometallics 1998, 17, 2183-2187.

• "Arriving at an Experimental Estimate of the Intrinsic Activation Barrier of Olefin Insertion into the Zr-C Bond of an Active Metallocene Ziegler Catalyst", J. Karl, M. Dahlmann, G. Erker, K. Bergander, J. Am. Chem. Soc. 1998, 120, 5643-5652.

• "Comparison of Characteristic Structural Features among the Triade of Tris(cyclopentadienyl)(Group-4 Metal) Complex Cations: a Combined Theoretical and Experimental Study", H. Jacobsen, H. Berke, T. Brackemeyer, T. Eisenblätter, G. Erker, R. Fröhlich, O. Meyer, K. Bergander, Helv. Chim. Acta 1998, 81, 1692-1709.

• "Synthesis of Azapolycyclic Systems Based on the Indolizino[3,4-b]quinoline Skeleton - A Diastereoselective Entry to Potential Oligodentate Artificial Receptors", O. Temme, T. Dickner, S. Laschat, R. Fröhlich, S, Kotila, K. Bergander, Eur. J. Org. Chem. 1998, 651-659.

 

1997:

• "Synthesis and in Vitro Cytotoxic Activity of Novel Hexahydro-2H-Pyrido[1,2-B]Isoquinolines against Human Brain Tumor Cell Lines", A. Monses, S. Laschat, M. Hotfilder, J. Wolff, K. Bergander, L. Terfloth, R. Fröhlich, Bioorganic & Medicinal Chemistry Letters 1997, 23, 2945-2950.

 

1994:

• "The Aggregation Behavior of Butyllithium, Phenyllithium, and Lithium Diisopropylamide in Dimethoxy- and Diethoxymethane", K. Bergander, R. He, N. Chandrakumar, O. Eppers, H. Günther, Tetrahedron 1994, 50, 5861-5868.

 

1993:

• "The 2H,2H-INADEQUATE Experiment: Detection of One- and Two-Spin Double Quantum Coherences", Helv. Chim. Acta 1993, 76, 1216-1218.

• "Selective 2H,2H 1D-TOCSY NMR Spectroscopy for Signal Assignment in Perdeuteriated Compounds, H.-E. Mons, K. Bergander, H. Günther, Magn. Reson. Chem. 1993, 31, 509-511.