but efficient: Aza‐fused polycyclic quinolines were efficiently assembled throughrhodium(III)‐based direct double CHactivation of N‐aryl azoles followed by cyclization with alkynes without heteroatom‐assisted chelation. Copper(II) acetate, aside from acting as an oxidant, could also play an important role in the CHactivation process.
A simple approach for synthesis of novel aza-fused scaffolds such as pyrido[1,2-α]benzimidazoles and imidazo[1,2-α]pyridines was developed by Rh(III)-catalyzed directoxidativecoupling between alkenes and unactivated alkynes without an extra directing group. The method would allow a broad substrate scope, providing fused heterocycles with potential biological properties.