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

1988-07-15

1990-02-06

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415788, 20415789, B01J 1908

Patent

active

048986550

ABSTRACT:
Optically active chrysanthemic acid or its derivatives of the formula ##STR1## (wherein X represents a hydroxyl group, a halogen atom, a C.sub.1-20 alkoxy group or a 2,2-dimethyl-3-isobutenyl-cyclopropane carboxyl group and * mark shows asymmetric carbon atom) is racemized by allowing it to react with a bromine compound or a SH compound, in the presence of light.

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patent: 4182906 (1980-01-01), Suzukamo et al.
patent: 4345090 (1982-08-01), Naumann
patent: 4410721 (1983-10-01), Franck-Neumann
patent: 4485257 (1984-11-01), Suzukamo et al.
patent: 4644080 (1987-02-01), Suzukamo et al.
patent: 4659864 (1987-04-01), Suzukamo et al.
patent: 4723035 (1988-02-01), Suzukamo et al.
Ueda et al., "Studies on Chrysanthemic Acid . . . ," Tetrahedron, vol. 27, pp. 2771-2774, 1971.

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