Abstract Tris (N, N-dialkylamino) phosphines undergo a transamination reaction with phosphinic acids containing the 3-phospholene ring. Yields of phosphinamides ranged from 66 to 93% for five different combinations. Products were characterized by 13C and 31P NMR. Transamination was not effected with diphenylphosphinic acid or methylphosphonic acid, but a low conversion of diethyl phosphate to its amide was achieved. With p- ...