Highly regioselective hydroselenation of inactivated terminal alkynes using diselenide–Ph2P(O)H mixed systems under visible-light irradiation

Upon visible-light irradiation, we could achieve a highly regioselective hydroselenation of inactivated terminal alkynes to give 1-(organylseleno)-1-alkenes by using diselenide–Ph2P(O)H mixed systems. The photoinduced hydroselenation presented in this study is advantageous as it does not involve the handling of oxygen-sensitive and foul-smelling selenols.