Intermediates in the preparation of cyclopropanecarboxylate...

Details Intermediates in the preparation of cyclopropanecarboxylate... Intermediates in the preparation of cyclopropanecarboxylate...

C - Chemistry, Metallurgy

07

D

260/359

C07D 311/94 (2006.01) C07C 45/40 (2006.01) C07C 49/513 (2006.01)

Patent

CA 1134375

ABSTRACT Novel intermediates in the manufacture of pyrethroid insecticides have the following general formula Image (III) wherein R1 is an alkyl group of 1 to 6 carbon atoms. The cyclo- propane ring preferably has the same stereochemical form as the cyclopropane ring in (+)-3-carene. The novel intermediates can be prepared by a process which comprises subjecting 4-hydroxy-2- carene to ozonolysis in the presence of an alkanol and reducing the ozonide product to the desired compound III. The starting material is preferably derived from (+)-3-carene.

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