Addition of nucleophiles to α,β-unsaturated sulphoximides is a facile reaction in two-phase systems. The chiral phase-transfer catalyst N-benzylquininium chloride is capable of asymmetric selection in the reaction of the α,β-unsaturated sulphoximides with thiols, enantiomeric excesses being in the range 1–13%.
R. Annunziata, M. Cinquini and S. Colonna, J. Chem. Soc., Perkin Trans. 1, 1980, 2422 DOI: 10.1039/P19800002422
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