Efficient Copper‐Catalyzed, One‐Pot Synthesis of N²‐Aryl Phosphoryl 1,2,3‐Triazole 1‐Oxides

A simple and facile one‐pot process has been developed for the synthesis of N 2 ‐aryl phosphoryl 1,2,3‐triazole 1‐oxide derivatives. This new approach utilizes simple and commercially available starting materials, operating under mild conditions. The method employs copper‐catalyzed multicomponent reaction, involving the combination of arylhydrazines, β ‐ketophosphonates, and tert ‐butyl nitrite. The developed protocol shows excellent functional group tolerance permitting an extensive range of substrate scope up to 92% isolated yield.