One-pot enyne ring-closing metathesis–Diels–Alder reactions for the synthesis of polycyclic sulfamides
2014
Ring-closing metathesis (RCM) and sequential Yb(OTf)3 promoted Diels–Alder reactions of sulfamide-linked enynes proceeded selectively in one-pot to afford a series of bicyclic and tricyclic sulfamides. Excellent levels of diastereoselectivity are observed for the cycloaddition step, with only the endo-adducts being isolated. The protocol was further extended to incorporate a one-pot RCM–cross metathesis (CM)–Diels–Alder sequence, permitting rapid access to high levels of molecular complexity from simple and easily accessible precursors.
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