Preparation of cyclopropane derivatives

Details Preparation of cyclopropane derivatives Preparation of cyclopropane derivatives

A - Human Necessities

01

N

260/518, 260/559

A01N 53/00 (2006.01)

Patent

CA 1123006

A B S T R A C T A process for the preparation of cyano-substitute cyclopropane derivatives of general formula:- Image (II) (wherein Hal represents a fluorine, chlorine or bromine atom; and R1 and R2 each individually represents an alkyl group of 1 to 4 carbon atoms) which comprises:- (a) cyclizing and dehydrohalogenating a compound of general formula:- Image (III) (wherein X and Y each individually represents a chlorine or bromine atom; and R4 represents a hydrogen atom or an alkyl group of 1 to 4 carbon atoms) in the presence of a base; and thermally decarboxylating the resulting cyclized and dehydro- halogenated product to form the compound of general formula II.

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