Enantiomeric separation of racemic nicotine by addition of an O,O″-disubstituted tartaric acid enantiomer

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United States of America

PATENT NO 11279685
APP PUB NO 20200331883A1
SERIAL NO

16956964

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Abstract

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The present invention relates to a method of separating racemic nicotine of Formula (1-a) as a mixture of the (R)- and (S)-enantiomers into the enantiomerically pure (S)- and (R)-nicotine represented by Formula (1-b) and (1-c), by adding a mixture of the L- and the D-enantiomer of a O,O′-disubstituted tartaric acid, wherein the molar ratio of the L- to the D-enantiomer is from 80:20 to 95:5, and obtaining the (S)-nicotine of formula (1-b), or by adding O,O′-dibenzoyl-D-tartaric acid and obtaining the (R)-nicotine of formula (1-c).

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Patent Owner(s)

  • SIEGFRIED AG; CONTRAF-NICOTEX-TOBACCO GMBH

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Pan, Ben Nantong, CN 3 5
Weber, Beat Theodor Zofingen, CH 12 4

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