Method for the resolution of racemic 2-cp-...

Details Method for the resolution of racemic 2-cp-... Method for the resolution of racemic 2-cp-...

C - Chemistry, Metallurgy

07

C

260/531.9

C07C 59/68 (2006.01) C07C 51/487 (2006.01)

Patent

CA 1209161

A METHOD FOR THE RESOLUTION OF RACEMIC 2-(p-DIFLUOROMETHOXYPHENYL)-3-METHYLBUTYRIC ACID ABSTRACT OF THE DISCLOSURE A method for the resolution of racemic 2-(p- difluoromethoxyphenyl)-3-methylbutyric acid into its optically active components. The method utilizes salts prepared by reacting the racemic acid with optically active amines and recovers the dextrorotatory isomer. The present invention also relates to insecticidal pyre- throids prepared from (+)-2-(p-difluoromethoxyphenyl)-3- methylbutyric acid.

435097

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