NOVEL CARBOXYLIC ACID ESTER DERIVATIVE* PREPARATION OF NOVEL CARBOXYLIC ACID ESTER DERIVATIVE* AND INSECTICIDE CONTAINING NOVEL CARBOXYLIC ACID ESTER DERIVATIVE

摘要

NEW MATERIAL:A carboxylic acid ester derivative of formula I (X is O, S or NH; Y is H or halogen provided that at least one of Y is halogen; R1 is 1-8C lower alkyl, lower alkenyl, haloalkyl, haloalkenyl, group of formula II, group of formula III, etc; R3 is H, lower alkyl, lower alkenyl, etc.; m is 1-3; n is 2-5; R2 is H, cyano or trifluoromethyl), its optical isomer or geometrical isomer. EXAMPLE:3'-Phenoxy-alpha'-cyanobenzyl 2,2-dimethyl-3-trifluoromethyl-3-methoxycyclopropanecarboxylate. USE:Insecticide effective to house vermin and agricultural and horticultural vermin, and low toxic to warm-blooded animals. It is stable to light. PROCESS:The compound of formula I is prepared by the thermal reaction of a carboxylic acid of formula IV or its reactive derivative with an alcohol of formula V, etc. in a proper solvent, preferably in the presence of a base as an acid acceptor or an acid as a catalyst.