p-CF3BnSe(O)CF2CN was developed as a cyanodifluoromethylselenonating reagent. In combination with Tf2O, this reagent system enabled an efficient synthesis of the biologically interesting 4-(cyanodifluoromethylseleno) isocoumarins from 2-alkynylbenzoates. Mechanistically, the transformation was...
Wu et al. (Wed,) studied this question.