Organophosphorus chemistry. Part V. Preparation of pentafluorophenylphosphorus chlorides and their reactions with amines

Abstract

Convenient methods are described for the preparation of pentafluorophenylphosphonous dichloride and bispentafluorophenylphosphinous chloride. Primary amines react with these phosphorus chlorides to give relatively stable phosphonous diamides and phosphinous amides. The compounds C₆F₅·P(NHR)₂ and (C₆F₅)₂P·NHR(R = Me, CH₂Ph, or Bu^t), C₆F₅·P(NMe₂)₂, (C₆F₅)₂P·NMe₂, and C₆F₅·PCl·NMe₂ have been prepared. Pyrolysis of the diamide C₆F₅·P(NH·CH₂Ph)₂ gives a cyclodiphosphazane, and hydrolysis of the diamide C₆F₅·P(NHBu^t)₂ yields the acid Bu^tNH·P(OH)₂.