反应详情

温度

25 °C

To a solution of 3,6-dimethyl-pyrazin-2-ylamine (5 g, 40.65 mmol) in dioxane (150 ml) was added ethoxycarbonyl isothiocyanate (4.75 ml, 40.65 mmol) at 25° C., and the reaction mixture was stirred for 18 hours at 25° C. Volatiles were removed in vacuo. The resultant residue was dissolved in ethyl acetate, washed with water twice, and brine, dried over anhydrous sodium sulfate, filtered, and evaporated affording ethyl-N-[(3,6-dimethylpyrazin-2-yl)carbamothioyl]carbamate (10 g, 96.73%) as a light yellow solid. MS: m/z=255 (M+H+)

1. customVolatiles were removed in vacuo
2. dissolutionThe resultant residue was dissolved in ethyl acetate
3. washwashed with water twice
4. dry with materialbrine, dried over anhydrous sodium sulfate
5. filtrationfiltered
6. customevaporated