Method for optical resolution of phenylacetic acid derivative

Details Method for optical resolution of phenylacetic acid derivative Method for optical resolution of phenylacetic acid derivative

1986-06-19

1988-06-21

Lone, Werren B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

560105, 562401, 562402, 562496, C07B 5700

Patent

active

047524170

ABSTRACT:
Alpha-isopropyl-p-chlorophenylacetic acid, which is an acid moiety of the pyrethroidal ester pesticides is subjected to optical resolution using optically active alpha-phenyl-beta-p-tolylethylamine or optically active alpha-phenylethylamine, as the optical resolution agent. The reaction of the acid with the amine is carried out in a hydrophobic organic solvent, such as aliphatic and aromatic hydrocarbons, in the presence of water, until the desired salt of the acid with the amine is separated therein through selective crystallization.

REFERENCES:
patent: 3405159 (1968-10-01), Krieger et al.
patent: 4376213 (1983-03-01), Nohira et al.

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