反应详情

温度

80 °C

First, 1.77 g of 2,4,5-trifluoronitrobenzene and 1.94 g of 3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidine were dissolved in 10 ml of dimethylsulfoxide, to which 1.52 g of anhydrous potassium carbonate was added at room temperature, and the mixture was stirred at 80° C. for 1 hour. The reaction mixture was cooled to room temperature and then poured into ice water, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and then concentrated. The residue was subjected to silica gel column chromatography to give 1.51 g of 2,5-difluoro-4-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2, 3,6-tetrahydropyrimidin-1-yl]nitrobenzene.

1. additionwas added at room temperature
2. temperatureThe reaction mixture was cooled to room temperature
3. extractionthe mixture was extracted with ethyl acetate
4. washThe organic layer was washed with saturated aqueous sodium chloride solution
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated