Palladium-Catalyzed Tandem Allenyl and Aryl C–N Bond Formation: Efficient Access to <i>N</i>‑Functionalized Multisubstituted Indoles

An efficient palladium-catalyzed synthesis of N-functionalized multisubstituted indoles from easily accessible ortho-haloarylallenes and primary amines has been developed. A wide range of electronically and structurally varied nitrogen fragments could be introduced through this tandem C–N bond-forming process by tuning the reaction conditions.