Patent ID: 6288271
Filing Date: 2001-09-11
Classification: C07C

Abstract:
A process for the preparation of (2,2,2-trifluoroethoxy)benzoic acids of the formula (I) or salts thereof ##STR9##whereinAr represents a benzene ring,R is hydrogen or a substituent selected from alkyl, alkoxy, alkylthio, halogen, haloalkyl, haloalkoxy, haloalkylthio, phenyl, phenoxy, benzyloxy, N-substituted or N,N-disubstituted amino groups, nitro, alkoxycarbonyl, cyano, carboxyl, and when m>1 the R substitutents may be the same or different;n is 1, 2, 3: andm is 0,1,2,3, or 4, where m+n.ltoreq.5,which process comprises reacting a halobenzoic acid or a salt thereof of the formula [II] ##STR10##whereinR, m and n are as defined above;M is hydrogen or a metal, ammonium or phosphonium cation; andX is Cl, Br, or I, and when n>1 the X substitutents may be the same or different;with 2,2,2-trifluoroethanol in the presence of a strong base and a copper containing material; if desired, followed by acidification.