Synthesis of [1,2,3]Triazolo[1,5-a]quinoxalin-4(5H)-ones Through Copper-Catalyzed Tandem Reactions of N-(2-Haloaryl)propiolamides with Sodium Azide.

The reaction is effective starting from iodo and bromo substrates, tolerates aromatic and aliphatic substituents at the triple bond and different substituents at the nitrogen and on the aromatic ring.