Sodium Bicarbonate → 4-pentyl-4,7-dihydro-8H-tetrazolo[1,5-a]purin-8-one

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Reaction Steps

A saturated aqueous NaNO2 (130 mg, 1.89 mmol) solution was added dropwise to a solution of (2E)-3-pentyl-3,7-dihydro-1H-purine-2,6-dione 2-hydrazone (150 mg, 0.63 mmol) in 5% aqueous HCl solution (3 ml) under stirring at room temperature. The mixture was stirred at room temperature for 1 hour. The mixture was neutralized by saturated NaHCO3 solution and extracted by ethyl acetate (3×). The combined organic phases were washed by brine and dried over MgSO4. The filtration and evaporation of solvent gave the desired product (94.6 mg, 60.7%) as white solid. LCMS calculated for C10H14N7O(M+H): 248.1; found: 248.0.

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