Patent ID: 6241917
Filing Date: 2001-06-05
Classification: B01J,C07B,C07C,C07F

Abstract:
A process which comprises (A) heating a mixture formed from ingredients comprising (i) at least one finely-divided alkali metal fluoride having an atomic number of 19 or more, (ii) at least one perhalobenzene of the formula C.sub.6 F.sub.n X.sub.6-n where n is 0 to 4, and each X is, independently, a chlorine or bromine atom, and (iii) an aminophosphonium catalyst, at one or more reaction temperatures at which chloropentafluorobenze or bromopentafluorobenzene is formed; (B) recovering chloropentafluorobenzene orbromopenptafluorobenzene formed in (A); and (C) converting chloropentafluorobenzene or bromopentafluorobenzene from (B) into a pentafluotophenyl Grignard reagent by a Grignard exchange reacting or into a pentafluorophenyl alkali metal compound by reaction with an alkali metal alkyl of the formula MR, where M is an alkali metal, and R is an alkyl group having 4 to about 12 carbon atoms.