Method for the resolution of racemic 2-(p-difluoromethoxyphenyl)

Details Method for the resolution of racemic 2-(p-difluoromethoxyphenyl) Method for the resolution of racemic 2-(p-difluoromethoxyphenyl)

1982-08-23

1984-06-12

Trousof, Natalie

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562472, C07B 1900

Patent

active

044543441

ABSTRACT:
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 pyrethroids prepared from (+)-2-(p-difluoromethoxyphenyl)-3-methylbutyric acid.

REFERENCES:
patent: 4178460 (1979-12-01), Berkelhammer et al.
patent: 4237313 (1980-12-01), Higo et al.

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