Process of braking triflouromethyl compounds

摘要

A process for the preparation of trifluoromethylvinyl compounds in all their possible streoisomeric forms and mixtures thereof comprising reacting a salt of trifluoroacetic acid with a halovinyl compound in the presence of a cuprous salt to obtain the same stereo-specific compound and all possible stereo-isomeric forms and mixtures thereof of 1R, trans compounds of the formula <IMAGE> I wherein R is an alcohol residue used in pyrethrinoid series, or an alcohol residue capable of blocking the acid function, and Z is aryl or haloaryl and the double bond has Z geometry having pesticide activity.