Silver Hexafluoroantimonate‐Catalyzed Three‐Component [2+2+1] Cycloadditions of Allenoates, Dual Activated Olefins, and Isocyanides

The intermolecular [2 + 2 + 1]multicomponent cycloadditions from readily available allenoates, dual activated olefins and isocyanides catalyzed by silver hexafluoroantimonate were studied. This protocol allowed the syntheses of highly functionalized five-membered carbocycles with exclusive regioselectivity and stereoselectivity in an efficient and atom-economical manner.

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