Abstract
Atom-economical addition: RhIII-catalyzed “Grignard-type” cyclization between cyclic N-sulfonyl ketimines and internal alkynes has been developed to afford multifunctional spirocyclic sultam products in high yields (up to 99 %) under mild conditions (see scheme, Cp* = pentamethylcyclopentadienyl, DCE = 1,2-dichloroethane).
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