Reactions of Ketosulfoxonium Ylides with Allylic Carbocations: Stereoselective and Direct Access to Highly-Substituted Cyclopropanes and α-Alkylated Ylides

Despite the well-documented use of sulfur ylides in organic synthesis, the reactivity of α-carbonyl sulfoxonium ylides with carbocations remains largely unexplored. We report the first reaction between sulfoxonium ylides and...