Racemization of optically active .alpha.-substituted-.alpha.-phe

Details Racemization of optically active .alpha.-substituted-.alpha.-phe Racemization of optically active .alpha.-substituted-.alpha.-phe

1979-04-30

1980-12-02

Trousof, Natalie

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

Organic compounds

Carboxylic acids and salts thereof

2603405R, 2603403, C07B 2000

Patent

active

042373131

ABSTRACT:
A process for racemization of optically active phenylacetic acid derivatives, which comprises heating an optically active phenylacetic acid derivative of the formula (I): ##STR1## wherein X and Y, which may be the same or different, each represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a halogen-substituted lower alkyl group or a halogen-substituted lower alkoxy group, or X and Y may jointly form an alkylenedioxy group; m and n, which may be the same or different, each represents an integer of 1 to 5, and the sum of m and n does not exceed 5; and R represents an isopropyl group or a cyclopropyl group, to a temperature of at least 150.degree. C. in the presence or absence of an inert solvent.

REFERENCES:
patent: 3213106 (1965-10-01), Sasaji et al.
patent: 3737454 (1973-06-01), Chibata et al.

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