Synthesis of 3‐Acyl‐1‐Indenones by Oxidative Cyclization of Symmetrical and Unsymmetrical Aryldiynes Using Palladium Nanoparticles (Pd‐BNP) as Reusable Nano Catalyst

Abstract An efficient, stable and reusable binaphthyl stabilized palladium nanoparticles (Pd‐BNP) catalyzed synthesis of 3‐acyl‐1‐indenone derivatives from oxidative cyclization of symmetrical and unsymmetrical aryldiynes using DMSO as a solvent as well as an oxidant has been established. The scope of the reaction has been studied with various aryldiynes having electron‐donating and electron‐withdrawing groups that afforded good yields. Pd‐BNP catalyst can be recovered and reused for up to four cycles without major changes in particle size and reactivity.