Synthesis of Asymmetric Functionalized Polyﬂuoroalkyl Phosphites
Two ways for the synthesis of new representatives of asymmetric organic phosphites with polyfluoroalkyl substituents were developed based on organic dichlorophosphites. The reaction of polyfluoroalkyl dichlorophosphites with allyl alcohol, proceeding at a temperature of -10-22°C (2 h) in the presence of triethylamine, gave diallyl polyfluoroalkyl phosphites in a yield of 75-77%. Under similar conditions (-30-22°C, 2-4 h, Et3N), alkyl (or aryl) dichlorophosphites react with polyfluoroalkanols to form alkyl (or aryl) bis(polyfluoroalkyl) phosphites (yield 56-67%). Arylbis(polyfluoroalkyl) phosphites, unlike diallylpolyfluoroalkyl- and alkylbis(polyfluoroalkyl) phosphites, are symmetrized under storage conditions (room temperature, inert atmosphere), forming the corresponding triaryl- and tris(polyfluoroalkyl) phosphites.