Palladium-Catalyzed Tandem Reaction of Three Aryl Iodides Involving Triple C–H Activation

A novel palladium-catalyzed tandem reaction of <i>N</i>-(2-iodoaryl)­acrylamides with two aryl iodides for the synthesis of spirooxindole has been achieved. The reaction underwent the process of triple C–H activation and four C–C bond formations based on the double trapping of transient spirocyclic palladacycles which are obtained through remote C–H activation