Racemization of optically active 2,2-dimethyl-3-(1'-alkenyl)-cyc

Details Racemization of optically active 2,2-dimethyl-3-(1'-alkenyl)-cyc Racemization of optically active 2,2-dimethyl-3-(1'-alkenyl)-cyc

1977-05-19

1980-01-08

Thomas, Jr., James O.

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

Organic compounds

Carboxylic acids and salts thereof

260544L, 562401, C07C 5100

Patent

active

041829069

ABSTRACT:
A method for racemization of optically active 2,2-dimethyl-3-(1'-alkenyl)-cyclopropane-1-carboxylic acids of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are each a hydrogen atom or an alkyl group having 1 to 4 carbon atoms or, when taken together with the carbon atom to which they are attached, represent a cycloalkylidene group having 4 to 6 carbon atoms, which comprises the step of contacting the corresponding acid halide with boron halide at a temperature of not more than 20.degree. C.

REFERENCES:
patent: 3794680 (1974-02-01), Mastui
patent: 3989750 (1976-11-01), Nagase

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