Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Asta Medica, Aktiengesellschaft

Stefan Merget

Franz-Rudolf Kunz

Peter Richter

Roland Singer

Thomas Mueller

Karlheinz Drauz

Hans-Peter Krimmer

Horst Bethge

Thomas Beisswenger

Thomas Müller

Gerhard Sator

Kurt Guenther

Roland Moeller

Thomas Muller

Chiral selectors having &#x3b1;-unsubstituted &#x3b2;-amino acid derivatives of the structure: a stationary phase for separating substance mixtures containing the chiral selector, and processes for separating mixtures of chiral substances, including enantiomers, and especially enantiomers of substances selected from &#x3b2;-amino acids and derivatives thereof, &#x3b1;-amino acids and &#x3b1;-hydroxy acids are provided.

Chiral selectors and stationary phases for separating enantiomer mixtures

Chromatographic separation of enantiomers of bicyclic lactams

Method for the conversion of the enantiomers of .alpha.-lipoic acid into the corresponding racemic mixture by racemizing the .alpha.-lipoic acid (pure optical isomers of .alpha.-lipoic acid or mixtures of optical isomers of .alpha.-lipoic acid wherein one of the optical isomers is present in excess) at temperatures of between 110.degree. C. and 200.degree. C. at pressures of from normal pressure up to 50 bar for a reaction time of 10 to 48 hours.

Method for the racemization of enantiomers of .alpha.-lipoic acid

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Rodgau, Germany

Stefan Merget