5-endo-dig Iodocyclisations of the homopropargylic sulfonamides 12a–c and 13 give excellent yields of the iododihydropyrroles 14a–d and thence the β-iodopyrroles 15a–d, following base-catalysed elimination of sulfinic acid.
D. W. Knight, A. L. Redfern and J. Gilmore, Chem. Commun., 1998, 2207 DOI: 10.1039/A806386I
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