Process for the preparation of cyclopropane compounds

Details Process for the preparation of cyclopropane compounds Process for the preparation of cyclopropane compounds

Filed on

1983-09-15

Date issued

1984-12-18

Examiner

Brust, Joseph Paul

Patent Class

Chemistry of carbon compounds

SubClass

Miscellaneous organic carbon compounds

SubSubClass

C-metal

Other Related Categories

260464, C07F 110, C07C12146

Type

Patent

Status

active

Patent number

044890052

Description

ABSTRACT:
Compounds of the general formula ##STR1## in which a chlorine or bromine atom and A represents a hydrogen or metal atom or an alkyl group of 1 to 4 carbon atoms, are prepared by cyclizing a compound of the general formula ##STR2## in which Hal' represents a chlorine or bromine atom, in the presence of an acid. The resulting compound is a useful intermediate in the synthesis of certain pyrethroid insecticides.

REFERENCES:
patent: 4154952 (1979-03-01), Schultz
patent: 4195033 (1980-03-01), Punja
patent: 4198347 (1980-04-01), Punja
patent: 4205009 (1980-05-01), Onore et al.
patent: 4243677 (1981-01-01), Engel
patent: 4250326 (1981-02-01), Fishman
patent: 4284582 (1981-08-01), Kaye et al.
patent: 4305885 (1981-12-01), Hanack et al.
patent: 4307033 (1981-12-01), Hoffmann et al.
patent: 4332745 (1982-06-01), Maurer et al.
Bahurel et al., Bull. de La Soc. Chem. de France, (1971) pp. 2209-2222.
CA 75: 88161K, Bahurel et al., (1971).

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