One-Pot Synthesis of Pyrimido[1,6-a]indol-1(2H)-one Derivatives by a Nucleophilic Addition/Cu-Catalyzed N-Arylation/Pd-Catalyzed C-H Activation Sequential Process

A novel and convenient one-pot synthesis of pyrimido[1,6-a]indol-1(2H)-one derivatives through a nucleophilic addition/Cu-catalyzed N-arylation/Pd-catalyzed C H activation sequential process is described. The reaction of easily prepared ortho-gem-dibromovinyl isocyanates with N-alkylanilines gave the desired indole derivatives in moderate to good yields.