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Dive into the research topics where Jens Schwentner is active.

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Featured researches published by Jens Schwentner.


Journal of Chromatography A | 1978

Separation of peracetylated mono- and disaccharides and quantitative analysis of guaran by high-performance liquid chromatography on silica gel

Joachim Thiem; Jens Schwentner; Horst Karl; Axel Sievers; Joachim Reimer

Abstract High-performance liquid chromatography on silica gel was successfully applied to the separation of 15 monosaccharide peracetates. The solvent system acetone-n-hexane gave the most efficient separations at the optimal flow-rate. Dependences of retention times or capacity factors on flow-rate or pressure were determined for all derivaties. The chromatograms obtained showed clear separations of all derivatives, including epimers and anomers. Similarly, 12 disaccharide peracetates were analysed. The best solvent system was acetone-n-pentane, and again the resulting chromatograms showed excellent separations. For detection both a UV photometer and a refractive index detector can be used, depending on the eluent. Acid cleavage and subsequent peracetylation of the polysaccharide guaran gave a mixture of peracetylated monosaccharides. The interpretation of the chromatogram led to qualitative results and, after careful calibration, to quantitative results for the ratio of galactose to mannose residues in guaran.


Synthesis | 1978

Synthese α-verknüpfter 2′-Deoxy-2′-iododisaccharide

Joachim Thiem; Horst Karl; Jens Schwentner


Chemische Berichte | 1980

Synthese neuer Mono‐ und Disaccharidglycale zum Aufbau von Oligodesoxyoligosacchariden

Joachim Thiem; Petra Ossowski; Jens Schwentner


Chemische Berichte | 1979

Synthese, Strukturaufklärung und Konformationsuntersuchungen 1→4‐verknüpfter Disaccharidglycoside vom 2,3‐Anhydro‐4‐O‐(hex‐2‐enopyranosyl)‐α‐D‐allopyranosid‐Typ

Joachim Thiem; Jens Schwentner; Eike Schüttpelz; Jürgen Kopf


Chemische Berichte | 1981

Ein Verfahren zur Synthese von α-Glycosiden der 3-Amino-2,3,6-tridesoxyhexopyranosen aus Glycalen

Kurt Heyns; J. Feldmann; Doris Hadamczyk; Jens Schwentner; Joachim Thiem


European Journal of Organic Chemistry | 1985

Untersuchungen zur Darstellung von Desoxyzucker-Steroidglycosiden

Joachim Thiem; Sabine Köpper; Jens Schwentner


Angewandte Chemie | 1979

Neuartige Glycale als Synthone für Saccharidsynthesen

Joachim Thiem; Petra Ossowski; Jens Schwentner


Chemische Berichte | 1980

Synthese eines Isomeren des Pentadesoxydisaccharids vom CB‐Typ in Anthracyclin‐Glycosiden

Joachim Thiem; Monika Holst; Jens Schwentner


Chemische Berichte | 1980

Darstellung der terminalen Pentadesoxydisaccharideinheit CB von Anthracyclin-Antibiotica

Joachim Thiem; Hans-Wilhelm Kluge; Jens Schwentner


Chemische Berichte | 1979

Synthese der terminalen Disaccharideinheit des Neodigoxins

Joachim Thiem; Jens Schwentner

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