Fluoro-containing 1-arylalkoxytris(dialkylamino)phosphonium salt, a process for their preparation and their use

摘要

1-Arylalkoxy-tris(dialkylamino)phosphonium salts of the formula I <IMAGE> (I) wherein the substituents R1 to R5 are equal or different and represent hydrogen, alkyl having from 1 to 6 carbon atoms which may be perfluorinated, halogen, alkoxy or alkylthio, each having from 1 to 6 carbon atoms, Y represents hydrogen or a perfluoroalkyl group CnF2n+1 having from 1 to 6 carbon atoms, X represents bromine or iodine and "Alkyl" represents an alkyl group of 1 to 3 carbon atoms, at most 3, preferably at most 2, of the groups R1 to R5 having a meaning other than hydrogen and the alkyl, alkoxy and alkylthio substituents attached to the aromatic nucleus altogether containing preferably at most 6 carbon atoms, in particular at most 4 carbon atoms. The invention also relates to a process for the preparation of the afore-mentioned phosphonium salts and to the use of the compounds of the formula I for the preparation of aromatic compounds having partly fluorinated groups of the formula V <IMAGE> (V) in which R1 to R5, X and Y have the afore-mentioned meaning, X can however also be hydrogen.