SYNTHESIS AND REACTIVITY WITH NUCLEOPHILE S OF UOROALKLMETHYLENEOXY(TRISDIMETHYLAMINO)PHOSPHONIUM SALTS

The reaction of perfluoroalkylmethanols (R(F)-CH2-OH) with tris(dimeth ylamino)phosphine in the presence of excess carbon tetrachloride produ ces the corresponding perfluoroalkymethyleneoxy(trisdimethylamino) pho sphonium chlorides in good yield. Exchange of anion chloride is effect ed, in aqueous solution, by nucleophilic or non-nucleophilic anions (N 3-, SCN-, NCO-, PF6-) via selective extraction or precipitation. Such salts are substrates for nucleophilic substitution yielding substitute d perfluoroalkylmethylene compounds (R(F)-CH2-Y).