PROCESS FOR PREPARING TRIFLUOROMETHYL AROMATIC COMPOUNDS

摘要

A process for the preparation of an aromatic trifluoromethyl compound which comprises contacting an aromatic compound of the formula wherein R1 denotes hydrogen, alkyl, aryl, aralkyl, aryloxy, arylthio, polyhalogenoalkoxy or polyhalogenoalkylthio and the aromatic substituents R1 can in turn be substituted by halogen, alkyl, polyhalogenoalkyl, polyhalogenoalkoxy, polyhalogenoalkylthio, nitro, chlorocarbonyl or chlorosulfonyl, and R2, R3, R4 and R5 are independently hydrogen, halogen or alkyl and two adjacent radicals of the group R1 to R5 can conjointly form a three-membered to five-membered alkylene radical, with carbon tetrachloride and hydrogen fluoride at a temperature in the range of 50 DEG C. to 140 DEG C. Certain new aromatic trifluoromethyl compounds which can prepared by such a process are also disclosed.