Process for preparing aryl perfluoroalkyl ketone

摘要

A process for preparing aryl perfluoroalkyl ketones of the general formula I wherein the radicals R¹ to R⁵ are identical or different and are hydrogen, alkyl having 1 to 6 carbon atoms, which may be perfluorinated, halogen, alkoxy or alkylthio each having 1 to 6 carbon atoms in the alkyl radical and n is 1 to 6, characterized in that Arylcarbonsäurederivate one of the general formula II wherein R¹ to R⁵ have the meaning indicated and X is the monovalent symbol Anhydridbrücke as chlorine, bromine or fluorine, and as the divalent symbol, with perfluoroalkyl halides of the general formula C _n F _{2n + 1} -Hal (III) wherein Hal is chlorine, bromine or iodine is, in the presence of Phosphorigsäuretrisdialkylamiden of the general formula P [N (alkyl) ₂] ₃ (IV).