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

Details Method for the racemization of enantiomers of .alpha.-lipoic aci Method for the racemization of enantiomers of .alpha.-lipoic aci

1995-07-20

1997-04-15

Dees, Jose' G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D33904

Patent

active

056211171

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.

REFERENCES:
patent: 4772727 (1988-09-01), Sutherland et al.
patent: 5281722 (1994-01-01), Blaschke et al.
Merck Index Abstract, p. 9165, 10th Edition (1983).

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