Practical Copper‐Catalyzed Double N‐Arylation of Cyclic Diaryliodoniums: Synthesis of 5H‐Dibenzo[d, f][1,3]Diazepine, and Benzo[c]Cinnoline Derivatives

An efficient access to novel families of 7‐membered dibenzodiazepines and 6‐membered benzo[ c ]cinnoline derivatives has been elaborated. The synthetic strategy is based on a copper‐catalyzed double N ‐arylation of cyclic diaryliodoniums with imidamides and 4‐substituted 1, 2, 4‐triazoline‐3, 5‐diones (TADs) respectively under ambient reaction conditions. A mechanistic rationale for the double N ‐arylation is discussed.