Method for racemization of optically active chrysanthemic acid o

Details Method for racemization of optically active chrysanthemic acid o Method for racemization of optically active chrysanthemic acid o

1987-09-04

1988-11-29

Shippen, Michael L.

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

Organic compounds

Carboxylic acid esters

562506, 562401, C07C 69747

Patent

active

047883235

ABSTRACT:
Racemization of optically active chrysanthemic acid or its ester of the formula: ##STR1## wherein R represents a hydrogen atom or an alkyl, cycloalkyl or aralkyl group of 1-20 carbon atoms and * indicates an asymmetric carbon atom, is effected by contacting it with hydrogen bromide or a phosphorus bromide compound. This method may also be effected in the presence of a peroxide or an azo compound. This method is industrially very useful.

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