Process for preparation of a crystalline insecticidal pyrethroid

Details Process for preparation of a crystalline insecticidal pyrethroid Process for preparation of a crystalline insecticidal pyrethroid

1979-06-06

1981-04-14

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

424304, C07C12175

Patent

active

042619211

ABSTRACT:
A crystalline, optically inactive compound comprising an equimolar mixture of the isomers (S)-(cyano) (3-phenoxyphenyl)methyl (1R,cis)-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate and (R)-(cyano)-(3-phenoxyphenyl)-methyl (1S,cis)-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate, its preparation by a cyclic crystallization/equilibration process, and its utility as an insecticide are described and exemplified.

REFERENCES:
patent: 4024163 (1977-05-01), Elliott et al.
patent: 4133826 (1979-01-01), Warnant et al.
patent: 4136195 (1979-01-01), Warnant et al.
patent: 4151195 (1979-04-01), Warnant et al.

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