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A practical transition metal-free approach for the selective benzylation of NH-sulfoximines has been disclosed by using simple elemental iodine as the catalyst and tert-butyl hydroperoxide (TBHP) as the terminal oxidant. Comparing with known methods for the construction of N-benzylated sulfoximines, our protocol shows broad substrate scope with respect to both diarylmethanes and alkylarenes, and can be conducted in air with good functional group tolerance.
Chen et al. (Wed,) studied this question.