Patent ID: 6750370
Filing Date: 2004-06-15
Classification: C07C

Abstract:
A process for racemizing an optically active vinyl-substituted cyclopropanecarboxylic acid compound of formula (1): wherein R1, R2, R3 and R4 each independently representa hydrogen atom, a halogen atom, an alkyl group having 1-4 carbon atoms, which may be substituted, an aryl group, which may be substituted, or an alkoxycarbonyl group, which may be substituted, or R1 and R2 are bonded to form an alkylene group, which may be substituted; and X represents a hydroxyl group, a halogen atom, an alkoxy group having 1-20 carbon atoms, which may be substituted, or an aryloxy group, which may be substituted, which process comprises reacting said optically active vinyl-substituted cyclopropanecarboxylic acid compound of formula (1) with a nitric compound selected from the group consisting of a nitrogen oxide, nitric acid, nitrate, and mixtures thereof.