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), 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. (C) 2008 Elsevier Ltd. All rights reserved.