N-(Phenylseleno)phthalimide is a versatile selenamide reagent and has been used:to selectively derivatize thiols for mass spectrometric analysisto derivatize thiol peptides in protein digestsin L-prolinamide or pyrrolidine trifluoromethanesulfonamide promoted α-selenenylation reactions of aldehydes and ketonesfor introducing PhSe into protected glycals, ketones, aldehydes, stannanesand exocyclic alkenes
