Water → 1-Dimethylsulfamoyl-1,2,4-triazole-3-carboxylic acid ethyl ester

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Reaction Steps

To a solution of 1.02 g (7.23 mmol) of 1H-1,2,4-triazole-3-carboxylic acid ethyl ester in 6 ml of DMF was added 1.46 g (1.44 mmol) of triethylamine. To the solution was added dropwise with stirring under ice-cooling 1.14 g (7.94 mmol) of dimethylsulfamoyl chloride. The mixture was stirred at room temperature for 8 hours. 30 ml of Water was added thereto and extracted with 20 ml of ethylacetate. The extract was washed with a saturated aqueous solution of sodium hydrogencarbonate and water, dried over Na2SO4 and evaporated under reduced pressure to give an oil. The obtained oil was purified with silica gel chromatography (eluate: hexane/ethylacetate=2:1) to give 1.46 g of 1-dimethylsulfamoyl-1,2,4-triazole-3-carboxylic acid ethyl ester as a white crystal. Yield: 82%.

Provenance & Evidence