反应详情

温度

55 °C

A mixture of 3-(4-chloro-2-nitrophenyl)-6-trifluoromethyl-2,4(1H, 3H)-pyrimidinedione (3 g), dimethyl sulfate (1.7 g) and potassium carbonate (1.85 g) in N,N-dimethylformamide (100 ml) was stirred at 55° C. overnight. The resulting mixture was allowed to cool to ambient temperature and filtered through Celite to remove unsoluble precipitate. The filtrate was diluted with a mixed solvent of ethyl acetate and hexane (1:1, 200 ml), washed with brine (×2) and dried over anhydrous sodium sulfate. After removal of the solvent, the residue was solidified. The yellow solid was recrystallized from ethyl acetate and hexane to give desired compound (2.3 g).

1. temperatureto cool to ambient temperature
2. filtrationfiltered through Celite
3. customto remove unsoluble precipitate
4. additionThe filtrate was diluted with a mixed solvent of ethyl acetate and hexane (1:1, 200 ml)
5. washwashed with brine (×2)
6. dry with materialdried over anhydrous sodium sulfate
7. customAfter removal of the solvent
8. customThe yellow solid was recrystallized from ethyl acetate and hexane