Intermediate in the preparation of cyclopropylcarboxylate...

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

C - Chemistry, Metallurgy

07

C

260/567.1

C07C 47/28 (2006.01) C07C 41/48 (2006.01) C07C 43/315 (2006.01) C07C 45/29 (2006.01) C07C 45/40 (2006.01) C07C 47/37 (2006.01) C07C 49/175 (2006.01)

Patent

CA 1112252

ABSTRACT NOVEL INTERMEDIATE IN THE PREPARATION OF CYCLOPROPYLCARBOXYLATE ESTERS AND PROCESS FOR ITS MANUFACTURE 3-Formyl-2,2-dimethylcyclopropanecarbaldehyde dimethyl 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 3-hydroxymethyl- 2,2-dimethylcyclopropanecarbaldehyde dimethyl acetal is subjected to the action of an oxidising agent, e.g. a chromium trioxide- pyridine complex.

316434

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