Insecticidal product and preparation thereof

Details Insecticidal product and preparation thereof Insecticidal product and preparation thereof

1983-09-26

1985-04-23

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12175

Patent

active

045129312

ABSTRACT:
A process is described by which the pair of cyhalothrin isomers represented by (R)-.alpha.-cyano-3-phenoxybenzyl (1R,cis)-3-(Z-2-chloro-3,3,3-trifluoroprop-1-en-1-yl)-2,2-dimethylcyclopro pane carboxylate and its enantiomer is converted by base catalyzed epimerization in solution into the insecticidally more useful isomer pair represented by (S)-.alpha.-cyano-3-phenoxybenzyl (1R,cis)-3-(Z-2-chloro-3,3,3-trifluoroprop-1-en-1-yl)-2,2-dimethylcyclopro pane carboxylate and its enantiomer, which may be caused to crystallize out from the solution.

REFERENCES:
patent: 4133826 (1979-01-01), Warnant et al.
patent: 4136195 (1979-01-01), Warnant et al.
patent: 4183948 (1980-01-01), Huff
Pesticide Science, vol. 11, No. 2, Apr. 1980, pp. 156-164, Society of Chemical Industry, Bentley et al., "Fluorinated Analogues of Chrysanthemic Acid".

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