PhotocatalyzedditrifluoromethylthiolationofalkeneswithCF3SO2Na<iclass="icon-zqcb"></i>

Since the first report of sodium trifluoromethanesulfinate（CF3SO2Na） as an electrophilic trifluoromethylthiolation reagent in 2015,there has been no breakthrough in research in this field.Herein,we disclose an unprecedented usage of CF3SO2Na as a radical trifluoromethylthiolation reagent.A photocatalyzed ditrifluoromethylthiolation of alkenes with CF3SO2Na in the presence of PPh3 and catalytic copper has been developed.Interestingly,either Ir[（p-Fppy）2（bpy）]PF6 or Ir（ppy）3 could facilitate this transformation.Mechanistic studies indicate that initiation of the radical chain proceeded via two different photocatalytic quenching mechanisms.This protocol provides a practical method for the construction of diverse vicinal ditrifluoromethylthiolated compounds.