Silver(I)-catalysed cyclisation of sulfide 1b and sulfoxides 4 and 5 to give the corresponding 2-vinylpyrrolidines 2b, 6a and 7a, respectively proceeds with a high (up to 99% diastereoisomeric excess) level of diastereoselectivity; in all of these cases the sense of asymmetric induction observed has been shown to be the same.
I. W. Davies, T. Gallagher, R. B. Lamont and D. I. C. Scopes, J. Chem. Soc., Chem. Commun., 1992, 335 DOI: 10.1039/C39920000335
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