63430-03-5

A process for the preparation of a trichloromethyl-trifluoromethyl-benzene of the formula STR1 wherein R1 and R2 are identical or different and represent hydrogen, fluorine or chlorine, By contacting at least one molecule of the formula STR2 wherein R1 and R2 are as previously identified, m and n are independently 0 to 3 With another molecule of the formula STR3 wherein M AND N ARE INDEPENDENTLY 0 TO 3 In the presence of a halogen transfer catalyst, optionally in the presence of a promoter.

A process for preparing a xylene which is fluorinated and chlorinated in the side chain, having the formula STR1 wherein X represents hydrogen or fluorine and Y represents hydrogen or chlorine and R1 and R2 are identical or different and represent hydrogen, halogen, a trifluoromethyl or trichloromethyl group or an aliphatic or aromatic radical and R1 and R2 can be bonded via hydrocarbon members to form an aromatic ring, By contacting a compound of the formula STR2 wherein X, R1 and R2 have the above-mentioned meanings, WITH A COMPOUND OF THE FORMULA STR3 wherein X, R1 and R2 have the above-mentioned meanings, in the presence of a halogen transfer catalyst at elevated temperature.

A process for the preparation of a trichloromethyl-trifluoromethylbenzene of the formula STR1 wherein R1 and R2 are independently selected from the group consisting of hydrogen, fluorine, chlorine and bromine which comprises contacting a bis-(trichloromethyl)-benzene of the formula STR2 wherein R1 and R2 have the previously assigned significance with less than 6 mols of anhydrous hydrogen fluoride in the presence of a halogen transfer catalyst.