The preparation of different [N-(arenesulfonyl) imino] phenyliodinones is described, along with an evaluation of their utility as nitrene precursors for the copper-catalyzed aziridination of different olefins. The best results were obtained with p-NO2-C6H4SO2N= IPh and p-MeO- C6H4SO2N= IPh, both of which were found superior to PhI= NTs, which previously has been the reagent of choice for this type of reaction. The corresponding aziridine derivatives ...