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Convenient synthesis of (S)-(+)-apomorphine from (R)−(−)-apomorphine

✍ Scribed by Patrick J. Davis; Selim Seyhan; William Soine; Robert V. Smith

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
404 KB
Volume
69
Category
Article
ISSN
0022-3549

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✦ Synopsis

A method was devised for preparing (S)-(+)-apomorphine from (R)-(-)-apomorphine. Dehydrogenation of the dimethyl ether of (R)-(-)-apomorphine with 10% palladium-on-carbon followed by reduction with sodium cyanoborohydride under acidic conditions resulted in quantitative racemization to give (R,S)-apomorphine dimethyl ether, which then was resolved with (-)-tartaric acid. Ether cleavage of (S)-(+)-apomorphine dimethyl ether (-)-tartrate with hydriodic acid in acetic anhydride yielded (S)-(+)-apomorphine, which was isolated as the hydrochloride salt in 99% enantiomeric excess.

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