A Reagent-Controlled Divergent Route to Pyranone Scaffolds via Formal Insertion of Vinyl Sulfoxonium Ylides into Activated Alkenes.
A reagent-controlled divergent reaction of vinyl sulfoxonium ylides with arylideneindane-1,3-diones has been developed. The transformation proceeds through in situ formation and selective cleavage of donor-acceptor cyclopropane intermediates, providing dihydropyranone and indenopyranone scaffolds with excellent regio-...