Catalyst-Controlled Chemodivergent [3+3] and [3+2] Formal Cycloadditions of Azomethine Ylides with Diphenylcyclopropenone

Abstract Chemodivergent cycloadditions of azomethine ylides with diphenylcyclopropenone involving either Cu-catalyzed [3+3] or Ag-catalyzed [3+2] processes have been developed. These transformations provide a highly efficient method for the preparation of a variety of aromatic substituted dihydropyridinones and dihydropyrrolones with excellent regio and diasteroselectivities.