Pd(II)-Catalyzed Regioselective Ring Opening/[3+2] Annulation Reaction of Enaminones with Cyclopropenones: Divergent Synthesis of γ-Butenolides and γ-Lactams

A practical, effective, and regioselective palladium-catalyzed ring opening/[4+2] annulation of enaminones with cyclopropenones for the controllable synthesis of highly substituted γ-butenolides and γ-lactams have been described. This method for the...