A Facile Synthesis of Imidotetraphenyldiphosphinic Acids

Abstract

Abstract A facile synthesis of HN[PO(C6H5)2]2(3), HN[PS(C6H5)2]2(4), HN[PSe(C6H5)2]2(5) and N[PNH2(C6H5)2]2Br(6) is described. The reaction of 1,1,1,3,3,3-hexamethyldisilazane and chlorodiphenylphosphine yields bis(diphenylphosphino)imine which then reacts with H2O2 in THF to give 3; with sulfur in toluene to give 4, with potassium selenocyanate in acetonitrile, followed by HCl/acetone, to give 5 and with bromine in dichloromethane, followed by ammonia to give 6.