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A one‐pot approach for the synthesis of 2‐aryl‐5‐amino‐1,2,3‐triazoles is reported. This approach involves a tandem nucleophilic addition of alkylamines to hydrazonoyl cyanides and in situ oxidative cyclization of the resulting 2‐(arylazo)ethene‐1,1‐diamines in the presence of copper(II) acetate and air. The described one‐pot procedure is characterized by good yields, excellent selectivity, methodical simplicity, and uses readily available chemicals. This method was applied to the gram‐scale synthesis of 2‐aryl‐1,2,3‐triazoles.

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The reactions of 2 arylhydrazono 2 carbamoylacetamidoximes with orthoesters afford either 3 arylhydrazono 1,2,4 oxadiazoles or 1,2,3 triazoles, depending on the reactant structure.

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