A General Method for the Synthesis of 5H‐Benzo[b]‐, Carbazolo[2,3‐b]‐ and Indolo[2,3‐b]carbazole Derivatives via Copper(II) Triflate‐Catalyzed Heteroannulation
A straightforward approach for the construction of 5H‐benzob]‐, carbazolo2,3‐b]‐ and indolo2,3‐b]carbazole derivatives has been developed by using copper(II) triflate‐catalyzed heteroannulation.