Intermediate in the preparation of cyclopropylcarboxylate...

Details Intermediate in the preparation of cyclopropylcarboxylate... Intermediate in the preparation of cyclopropylcarboxylate...

C - Chemistry, Metallurgy

07

C

260/492.7

C07C 69/14 (2006.01) C07C 45/40 (2006.01) C07C 49/175 (2006.01) C07C 61/40 (2006.01)

Patent

CA 1147345

ABSTRACT "NOVEL INTERMEDIATE IN THE PREPARATION OF CYCLOPROPYLCARBOXYLATE ESTERS AND PROCESS FOR ITS MANUFACTURE" 3-Acetoxymethyl-2,2-dimethylcyclopropanecarbaldehyde di- methyl acetal, especially in the same stereoisomeric form as that of the cyclopropane ring in (+)-3-carene, is a novel intermediate useful in the manufacture of pyrethroid insecticides. It may be manufactured by a process characterised in that 2-(3-acetoxy- methyl-2,2-dimethylcyclopropyl)vinyl acetate is subjected to ozonolyis and the ozonolysis product so formed is subjected to reduction in the presence of methanol and an acetalizing cata- lyst.

316406

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