| abstract |
A process for the preparation of chlorinated and fluorinated benzene compounds of the general formula (1) ##STR1## in which R denotes --CN or --COOalkyl(C 1 -C 6 ), and X and Y each denote chlorine or fluorine, X and Y being not identical, by fluorodenitration, which comprises reacting a compound of the formula (2) ##STR2## in which R is defined as above, and X' and Y' each denote chlorine or nitro, X' and Y' being nor identical, with potassium fluoride in a dipolar aprotic solvent in the presence of a transfer catalyst at a temperature from about 50° C. to about 250° C. |