Title:
METHOD FOR PREPARATION OF DIHALOGENOVINYLLCYCLOPROPANEE CARBOXYLIC ACID AND ITS ESTER
Document Type and Number:
Japanese Patent JPS53112853
Kind Code:
A
Abstract:
A process for the preparation of a dihalogenovinylcyclopropanecarboxylic acid or an ester thereof, of the formula in which Hal each independently is fluorine, chlorine or bromine, R1 and R2 each independently is hydrogen or C1-4-alkyl, or R1 and R2 together with the adjacent carbon atom form a cycloaliphatic ring with up to 7 carbon atoms, and R3 is hydrogen, C1-4-alkyl or optionally substituted arylmethyl or hetero-arylmethyl, which comprises reacting a 3-chloro-2-(2',2'-dihalovinyl)propanecarboxylic acid ester of the formula in which R4 is C1-4-alkyl or optionally substituted arylmethyl or hetero-arylmethyl, with a base. The propane carboxylic acid esters are new and may be formed in situ by reacting a 3-(2',2'-dihalovinyl)- gamma -butyrolactone of the formula with a chlorinating agent and then with an alcohol of the formula R4-OH. The end products are insecticidally active and can also be used as intermediates for producing other insecticides.
Inventors:
RAINHARUTO RANCHIYU
Application Number:
JP2507678A
Publication Date:
October 02, 1978
Filing Date:
March 07, 1978
Export Citation:
Assignee:
BAYER AG
International Classes:
A01N53/00; A01N53/02; A01N53/10; B01J31/00; C07C69/743; C07B61/00; C07C51/00; C07C57/52; C07C61/40; C07C67/00; (IPC1-7): A01N9/24; B01J31/02; C07C61/04; C07C69/74