Method for the racemization of enantiomers of .alpha.-lipoic acid
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United States of America Patent
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Apr 15, 1997
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N/A
app pub date -
Jul 20, 1995
filing date -
Jul 30, 1994
priority date (Note) -
Expired
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Abstract
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.
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