Synthesis of secondary thiols from terminal alkenes and P2S5

Secondary alkane-2-thiols were obtained through the reaction of terminal alkenes with P₂S₅ promoted by radical initiators, e.g. TEMPO, AIBN, H₂O₂ or Bu^tOOH. The yields of 75–86% were achieved by the use of TEMPO in toluene at 80–100 °C or ButOOH in CH₂Cl₂ at 40 °C.