| 摘要 |
<p>1. Process for preparing fluorinated aromatics 2.1 It is known to prepare fluorinated aromatic compounds of the formula I in which X, Y and Z can have the meaning specified in the description, by reacting aromatic compounds of the formula II in which X, Y and Z have the meaning specified for formula I, with fluorine in a reaction medium. 2.2 According to the invention, the direct fluorination is carried out in a reaction medium containing polyfluoroalkanesulfonic acids of the formula III CFnH3-n(CFY)m-SO3H (III) in which m, n and Y have the meaning specified in the description. By this means, it is possible, particularly advantageously to provide a process, which improves the known processes not only with regard to the selectivity and the yield, but also with respect to the quality of the resulting products of the process in a manner not readily predictable. 2.3 Fluorinated aromatic compounds of the formula ? as intermediates for active compound synthesis.</p> |
