Abstract Two N, N-diethyl derivatives of phosphinamides in the 3-phospholene series were used as models to develop techniques for reduction to P (III) derivatives. The products from the reduction with HSiCl3 in the presence of pyridine depended on the molar ratio of the participants. A 1: 1: 1 amide-HSiCl3-pyridine mixture after 2 h in refluxing benzene provided the phosphinous chlorides in preparatively useful (55–65%) yield. A 1: 1.5: 1.5 mixture led ...
