The heterogeneous sulfimidation of various sulfides by microencapsulated copper(II) acetylacetonate, [MC-Cu(acac) 2 ], and Cu(acac) 2 immobilized in ionic liquids using [N-(p-tolylsulfonyl)imino]phenyliodinane (PhI ¼ NTs) as nitrene donor has been developed to afford the corresponding sulfimides in good to excellent yields. In the presence of a chiral bis(oxazoline) as ligand, asymmetric induction occurs to afford the chiral sulfimides (up to 50% ee). The ionic liquid containing the immobilized bis(oxazoline)-copper catalyst can be reused for several cycles with consistent activity and enantioselectivity.
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