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Title:
OPTICALLY ACTIVE ALPHA-CYANO-3-PHENOXYBENZYL 2-(4-TERT- BUTYLPHENYL)ISOVALERATE, ITS PREPARATION, AND INSECTICIDE AND ACARICIDE COMPRISING IT
Document Type and Number:
Japanese Patent JPS55104250
Kind Code:
A
Abstract:

PURPOSE: To obtain the title optically active compound having an activity 4 times that of the racemic modification, by adding a seed crystal to an α-cyano-3-phenoxybenzyl ester solution.

CONSTITUTION: S-(+)-2-(4-tert-Butylphenyl)isovaleric acid is esterified by the well-known method to form a solution of an ester (in a lower alcohol) having the acid side of the (S) form. Crystals of the ester of the formula (× is asymmetric carbon atom), wherein the acid and alcohol sides are (S)-forms, are formed from the solution in the presence or absence of a basic catalyst, e.g. a nitrogen or metallic base, and separated from the mother liquor. Alternatively, an ester wherein the acid side is the (S)-form is recovered by concentration to give the title compound comprising 60% or more of ester having the both sides of (S)-forms, and a high activity.


Inventors:
AKITA KOUICHI
KASAMATSU NORIYOSHI
SUZUKI YUKIO
Application Number:
JP1979000012501
Publication Date:
August 09, 1980
Filing Date:
February 05, 1979
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO
International Classes:
A01N37/34; C07B31/00; C07B57/00; C07C67/00; C07C253/00; C07C255/38; (IPC1-7): A01N37/34; C07B19/00; C07C121/75
Domestic Patent References:
JPS4926425A1974-03-08
JPS5025544A1975-03-18



 
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