Photoinduced highly selective thiophosphination of alkynes using a (PhS)2/(Ph2P)2 binary system

Development of highly selective method for simultaneous introduction of different heteroatom functions into carbon–carbon unsaturated bonds is of special interest. When a mixture of tetraphenyldiphosphine (Ph2P)2 and diphenyl disulfide (PhS)2, and phenylacetylene in CDCl3 was irradiated with a xenon lamp through Pyrex at ambient temperature, a highly regioselective addition of phosphino and thio groups into carbon–carbon triple bond took place simultaneously to give the corresponding thiophosphination product in high yield.