Intermediate in the preparation of cyclopropanecarboxylate...

Details Intermediate in the preparation of cyclopropanecarboxylate... Intermediate in the preparation of cyclopropanecarboxylate...

C - Chemistry, Metallurgy

07

C

260/567.1

C07C 47/293 (2006.01) C07C 45/29 (2006.01) C07C 45/30 (2006.01) C07C 47/37 (2006.01)

Patent

CA 1123857

ABSTRACT Novel intermediate in the manufacture of pyrethroid insecticides has the following formula Image The compound preferably has the same stereoisomeric form as the cyclopropane ring in (+)-3-carene. The novel intermediate can be prepared by a process which comprises oxidising 2-(2-hydroxymethyl-3,3-dimethylcyclopropyl)ethanal dimethyl acetal, for example by means of a chromium trioxide-pyridine complex of a pyridinium chlorochromate. The starting material is preferably derived from (+)-3-carene.

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