METHOD OF PRODUCING CYCLOPROPANE CARBOXYLATES

摘要

Novel alkynylcyclopropanecarboxylic acid esters represented by the formula, <IMAGE> wherein R1 represents hydrogen, halogen, lower alkyl having up to 5 carbon atoms, lower alkenyl having up to 5 carbon atoms, lower alkynyl having up to 5 carbon atoms, C1-C4 alkoxy C1-C4 alkyl, C1-C4 alkylthio C1-C4 alkyl, aryl, aryl C1-C4 alkyl, furyl, substituted furyl, thienyl, substituted thienyl, furfuryl, substituted furfuryl, thenyl, substituted thenyl, cyclo C3-C6 alkyl, substituted cyclo C3-C6 alkyl, cyclo C3-C6 alkenyl or substituted cyclo C3-C6 alkenyl; R2 and R3 individually represent hydrogen, halogen, lower alkyl having up to 5 carbon atoms, lower alkenyl having up to 5 carbon atoms, lower alkynyl having up to 5 carbon atoms, aryl, aryl C1-C4 alkyl or may form a carbon-carbon bond; or R1 and R3 are bonded to each other at the ends to form a polymethylene chain containing or not containing an oxygen or a sulfur atom, or R1 and R2 are bonded to each other at the ends to form a polymethylene chain containing or not containing an oxygen or a sulfur atom; R4 represents hydrogen or methyl; R5 represents hydrogen, methyl, vinyl, 1-propenyl, 2-methyl-1-propenyl, 2-methoxymethyl-1-propenyl, 2-methoxycarbonyl-1-propenyl, 2,2-dichlorovinyl or cyclopentyl-idenemethyl when R4 is hydrogen, and R5 represents methyl when R4 is methyl; and R6 and R7 represent hydrogen or methyl. These novel esters are produced by reacting an alcohol or its halide or arylsulfonate of the formula, <IMAGE> wherein R1, R2, R3 and R6 are defined above, and A is hydroxy, halogen or arylsulfoxy, with a cyclopropane-carboxylic acid of the formula, <IMAGE> wherein R4, R5 and R7 are as defined above, or its reactive derivative. These esters are useful as an insecticide harmless to mammals.