The developed method to MeSO2-derivatives was not without limitations, however. It worked well only for the electron-rich systems. Not sufficiently activated para-bromo and paramethoxy anilines gave only the side products 55 and 56, correspondingly. From reagent 1 we also could not obtain products 57-60 as formation of a complex mixtures was observed in each case (Scheme 3; see also SI p. S39-S40).