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Title:
PRODUCTION OF TRANS-CHRYSANTHEMUM-MONOCARBOXYLIC ACIDS
Document Type and Number:
Japanese Patent JPS63246348
Kind Code:
A
Abstract:

PURPOSE: To extremely efficiently obtain the corresponding trans-chrysanthe mum-monocarboyxlic acids useful as a raw material for pyrethroid based insecticides under mild condition, by reacting mixed cis- or cis/tans- chrysanthemum-monocarboxylic acids with a phosphorus bromide compound in the presence of a peroxide.

CONSTITUTION: Mixed cis- or cis/trans-chrysanthemum-monocarboxylic acids expressed by the formula (R is H or 1W20C alkyl, cycloalkyl or aralkyl)are reacted and converted into the trans-isomer with a phosphorus bromide compound, such as phosphorus tribromide, phosphorus pentabromide and/or phosphorus oxytribromide, in the presence of a peroxide, preferably hydroperoxides, diacyl peroxides or peroxy esters, particularly hydroperoxides, normally at -20W+100°C temperature to industrially and advantageously afford the corresponding trans-chrysanthemum-monocarboxylic acids having more powerful insecticidal efficacies than those of the cis-isomer using the phosphorus bromide compound which is more common as the industrial raw material.


Inventors:
SUZUKAMO TAKEO
FUKAO MASAMI
SAKITO YOJI
Application Number:
JP8079287A
Publication Date:
October 13, 1988
Filing Date:
March 31, 1987
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO
International Classes:
B01J27/14; C07B61/00; C07C51/00; C07C51/353; C07C61/37; C07C67/00; C07C69/747; (IPC1-7): B01J27/14; C07C51/353; C07C61/37; C07C67/00; C07C69/747
Domestic Patent References:
JPS63196541A1988-08-15
Attorney, Agent or Firm:
Moroishi Mitsuhiro