76725-69-4Relevant academic research and scientific papers
Process for the preparation of styryl-cyclopropanecarboxylic acid esters and intermediate products for this process
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, (2008/06/13)
A process for the preparation of a styryl-cyclopropane-carboxylic acid ester of the formula STR1 in which R is C1-4 -alkyl or an alcohol radical customary in pyrethroids, R1 is alkoxy or alkylthio, either of which may be optionally substituted by halogen, R2 is hydrogen or alkoxy, or R1 and R2 together are optionally halogen-substituted alkylenedioxy, and R3 is hydrogen or chlorine, comprising reacting a compound of the formula STR2 with, respectively, one, two or three equivalents of a base at a temperature below 60° C. The products are insecticidally active when R is the residue of a pyrethroid-type alcohol. Various syntheses are given for the starting materials which are new.
