Synthesis of 10H-indolo[1,2-a]indol-10-ones via palladium-catalyzed C–H bond activation and difluorocarbene transfer

A Pd-catalyzed annulation between 1-(2-iodophenyl)-1 H -indoles and sodium difluorochloroacetate has been developed to synthesize 10 H -indolo[1,2- a ]indol-10-one derivatives via C–H bond activation and difluorocarbene transfer.