One-Step Conversion of Azine N-Oxides to α-1,2,4-Triazolo-, 1,2,3-Triazolo, Imidazolo-, and Pyrazoloheteroarenes

Pyridine, quinoline, isoquinoline, azaindole, and pyrimidine N-oxides were converted to their alpha-triazole and alpha-diazole derivatives by treatment with the corresponding p-toluenesulfonylazoles and Hunig's base at elevated temperatures.