| abstract |
The invention relates to a process for the preparation of aromatic fluoro compounds of the formula I FnArR1R2R3 (I) in which Ar is phenyl, naphthyl or pyridyl, R1, R2 and R3 indepen-dently of one another are hydrogen, halogen, (C1-C4)-alkyl, phenyl, NR2, OR, CN, CHO or COR, where R is hydro-gen or (C1-C6)-alkyl, and n = 1, 2, 3, 4 or 5, which comprises reacting aromatic fluoro compounds of the formula II XmFnArR1R2R3 (II) in which Ar, R1, R2, R3 and n have the abovementioned meaning, each X is a chlorine or bromine atom and m = 1, 2, 3, 4 or 5, with hydrogen in the presence of a pal-ladium catalyst, a water-insoluble amine which also does not form water-soluble hydrohalides, and if desired an inert solvent. |