Insecticidal ester

Details Insecticidal ester Insecticidal ester

C - Chemistry, Metallurgy

07

C

260/496.6, 167/1

C07C 255/41 (2006.01) A01N 53/00 (2006.01)

Patent

CA 1263402

INSECTICIDAL ESTER ABSTRACT A process is described by which the pair of isomers represented by (R)- ?-cyano-4-fluoro-3-phenoxybenzyl (1R,cis)-3-(Z-2-chloro-3,3,3-trifluoroprop-1-en-1-yl)-2,2- dimethylcyclopropane carboxylate and its enantiomer is converted by base catalysed epimerisation in solution into the insecticidally more useful isomer pair represented by (S)-?-cyano-4-fluoro-3-phenoxybenzyl (1R,cis)-3-(Z-2- chloro-3,3,3-trifluoroprop-1-en-1-yl)-2,2-dimethylcyclo- propane carboxylate and its enantiomer, which may then be caused to crystallise out from the solution.

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