Process for producing pyrethrolone and its intermediate...

Details Process for producing pyrethrolone and its intermediate... Process for producing pyrethrolone and its intermediate...

C - Chemistry, Metallurgy

07

C

C07C 49/743 (2006.01) C07C 45/62 (2006.01) C07C 45/68 (2006.01)

Patent

CA 2068966

ABSTRACT Pyrethrolone of the formula [II], Image [II] is produced by reacting a cyclopentenolone derivative of the formula [I], Image [I] with zinc in an aqueous alcohol solvent. And the cyclopentenolone derivative of the formula [I] is produced by reacting a propargylcyclopentenolone derivative of the formula [III], Image [III] with vinyl halide in the presence of a palladium catalyst, a copper catalyst and a tertiary amine. These processes permit easy production of pyrethrolone of the formula [II] and an intermediate compound of the formula [I] for the production of the pyrethrolone.

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