Method for racemization of chrysanthemic acid or its ester

Details Method for racemization of chrysanthemic acid or its ester Method for racemization of chrysanthemic acid or its ester

1985-06-14

1987-04-21

Shippen, Michael L.

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

Organic compounds

Carboxylic acid esters

562401, 562506, C07C 51353, C07B 2000

Patent

active

046598642

ABSTRACT:
An optically active chrysanthemic acid or esters thereof are conveniently racemized with an aluminum bromide compound such as aluminum tribromide. An organic hydroperoxide should always be added to for racemization of the esters, but is not always necessary for racemization of the acid.

REFERENCES:
patent: 3794680 (1974-02-01), Matsui
patent: 3989750 (1976-11-01), Nagase
patent: 4182906 (1980-01-01), Suzukamo
patent: 4473703 (1984-09-01), Suzukamo
patent: 4485257 (1984-11-01), Suzukamo

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