| abstract |
Process for the preparation of halogen-containing aromatic compounds of the formula in what mean Hal halogen, RH, C₁-C₃-alkyl, phenyl, halogen or trifluoromethyl, Y CO or SO₂ and Z is an aromatic or heteroaromatic grouping, where YZY- together can also be CO or SO₂, characterized in that a halogen aromatic compound of the formula RC₆H₄Hal (II) with a bisacid halide of the formula Hal-YZY-Hal (III) in a molar ratio of at least 2: 1 in the presence of hydrogen fluoride and boron trifluoride, wherein in the formulas II and III Hal , R, Y and Z have the meaning given above. |