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Thorsten Kemmer

Bielefeld University

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Featured researches published by Thorsten Kemmer.

Zeitschrift für Naturforschung B | 1979

Die Einzelkomponenten der Bacteriophäophorbidmethylester von Bacteriochlorophyll c und d / The Individual Components of Bacteriophaeophorbide Methyl Esters from Bacteriochlorophyll c and d

Thorsten Kemmer; Hans Brockmann; Nikolaus Risch

Abstract The preparative column chromatographic separation on small grained silica gel of the bacteriophaeophorbide-c- and -d-methyl esters into their homologous and isomeric components is described. The influence of particular regions of the molecule, which carry different alkyl-substituents, on the chromatographic separability is selectively enhanced through the variation of the eluent. Mass and 1H NMR spectra of the pure components are discussed.

Angewandte Chemie | 1976

Absolute Configuration of 2‐(2,4,5,7‐Tetranitro‐9‐fluorenylideneaminooxy)propionic Acid (TAPA)

Thorsten Kemmer; William S. Sheldrick; Hans Brockmann

Angewandte Chemie | 1978

Demonstration of Diastereomeric Electron‐Donor‐Acceptor Complexes by 1H‐NMR Spectroscopy

Albrecht Mannschreck; Peter Roza; Hans Brockmann; Thorsten Kemmer

Angewandte Chemie | 1978

Nachweis diastereomerer Elektronen‐Donor‐Acceptor‐Assoziate durch 1H‐NMR‐Spektroskopie

Albrecht Mannschreck; Peter Roza; Hans Brockmann; Thorsten Kemmer

European Journal of Organic Chemistry | 1978

Chromatographische Trennung und Charakterisierung der Bacteriomethylphäophorbide e

Nikolaus Risch; Thorsten Kemmer; Hans Brockmann

European Journal of Organic Chemistry | 1981

Über Aminosäure-Antagonisten, IV Trennung und Bestimmung der Konfigurationen der stereoisomeren N-Acetyl-2-(2′-cyclohexenyl)glycine

Sentot Santoso; Thorsten Kemmer; Wolfram Trowitzsch

Angewandte Chemie | 1976

Die absolute Konfiguration von 2‐(2,4,5,7‐Tetranitro‐9‐fluorenyliden‐aminooxy)propionsäure (TAPA)

Thorsten Kemmer; William S. Sheldrick; Hans Brockmann

ChemInform | 1981

AMINO ACID ANTAGONISTS. IV. SEPARATION AND DETERMINATION OF THE CONFIGURATIONS OF THE STEREOISOMERIC N-ACETYL-2-(2′-CYCLOHEXENYL)GLYCINES

S. Santoso; Thorsten Kemmer; W. Trowitzsch

ChemInform | 1979

APPLICATION OF THE NMR SPECTROSCOPY OF CHIRAL ASSOCIATES. 7. DETECTION OF DIASTEREOMERIC ELECTRON DONOR-ACCEPTOR ASSOCIATES BY PROTON NMR SPECTROSCOPY

Albrecht Mannschreck; Peter Roza; H. Jun. Brockmann; Thorsten Kemmer

Archive | 1978

Anwendung der NMR-Spektroskopie chiraler Assoziate 7: Nachweis diastereomerer Elektronen-Donor-Acceptor-Assoziate durch ¹H-NMR-Spektroskopie

Albrecht Mannschreck; Peter Roza; Hans Brockmann; Thorsten Kemmer

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Hans Brockmann

University of Göttingen

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Albrecht Mannschreck

Heidelberg University

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Nikolaus Risch

Bielefeld University

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William S. Sheldrick

Ruhr University Bochum

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Wolfram Trowitzsch

Novartis

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