Potassium Carbonate → 4-nitro-2-(1H-1,2,4-triazol-1-yl)pyridine 1-oxide

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To a solution of 2-chloro-4-nitropyridine 1-oxide (2.00 g, 11.4 mmol) and 1-(trimethylsilyl)-1H-1,2,4-triazole (1.64 mL, 11.4 mmol) in DMF (40 mL), was added potassium carbonate (4.75 g, 34.4 mmol). The reaction mixture was allowed to stir at rt for 2 h. The DMF was evaporated and water was added. The precipitate was filtered and washed with water then hexane and dried under vacuum. The solid was purified by column to give 4-nitro-2-(1H-1,2,4-triazol-1-yl)pyridine 1-oxide (0.643 g, 27.1%) as a pale yellow solid. LCMS: (FA) ES+ 208.1, ES− 206.1.

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