2-(2',2'-Dichloro-3',3',3'-trifluoropropyl)- and 2-(2',2',3'-tri

Details 2-(2',2'-Dichloro-3',3',3'-trifluoropropyl)- and 2-(2',2',3'-tri 2-(2',2'-Dichloro-3',3',3'-trifluoropropyl)- and 2-(2',2',3'-tri

1980-11-28

1982-09-28

Trousof, Natalie

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C07C 49457

Patent

active

043519610

ABSTRACT:
Compounds of the formula I ##STR1## wherein X is chlorine or fluorine, are suitable for producing 2,2-dimethyl-3-(2'-chloro-3',3',3'-trifluoroprop-1'-en-1'-yl)- and 2,2-dimethyl-3-(2',3'-dichloro-3',3'-difluoroprop-1'-en-1'-yl)-cyclopropan ecarboxylic acids and insecticidally effective esters thereof (pyrethroids). The cyclobutanones (I) can be produced by the addition reaction of 2,4,4,5-tetrachloro-5,5-difluoro- or 2,4,4-trichloro-5,5,5-trifluoropentane-1-carboxylic acid chloride with isobutylene, and rearrangement of the resulting 2-chloro-2-(2',2',3'-trichloro-3',3'-difluoropropyl)- or 2-chloro-2-(2',2'-dichloro-3',3',3'-trifluoropropyl)-3,3-dimethylcyclobuta n-1-one in the presence of catalysts.

REFERENCES:
patent: 3140298 (1964-07-01), England
patent: 4234517 (1980-11-01), Greuter et al.
patent: 4242278 (1980-12-01), Martin et al.

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