Synthesis of Dibenzo-Fused Seven-Membered Heterocycles Via Copper-Catalyzed Cyclization of 2-Haloaniline Compounds

A one-step synthesis of dibenzo-fused seven-membered nitrogen heterocycles from acetophenones/benzophenones and 2-haloanilines, via a copper-catalyzed amination, was developed. The reaction involves animation followed by intramolecular cyclization.