Rh(<scp>iii</scp>)-Catalyzed multi-site-selective C–H bond functionalization: condition-controlled synthesis of diverse fused polycyclic benzimidazole derivatives

Highly selective activation of multiple sites of C–H bonds in a complex organic compound is a huge challenge. Herein, diverse novel fused polycyclic- and multi-substituted 2-oxyl naphthalene benzimidazole derivatives were selectively synthesized via Rh(III)-catalyzed tandem C–H activation/cyclization. The efficient strategy for the construction of diverse annulation products was precisely controlled by changing the reaction conditions.