反应详情

0.50 g (1.3 mmol) of 3-(4-chloro-2-ethyl-6-fluorobenzofuran-7-yl)-6-trifluoromethyluracil and 0.30 g (2.3 mmol) of potassium carbonate, were suspended in 20 ml of N,N-dimethylformamide, and 0.23 g (1.6 mmol) of methyl iodide was dropwise added thereto under cooling with ice. After stirring at room temperature for 3 hours, the reaction solution was poured into water and extracted with ethyl acetate. The organic layer was washed sequentially with water and a saturated sodium chloride aqueous solution and then dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure. Then, the obtained residue was purified by silica gel column chromatography to obtain 0.48 g (yield: 92%) of the desired product as white crystals. Melting point: 142-143° C.

1. temperatureunder cooling with ice
2. extractionextracted with ethyl acetate
3. washThe organic layer was washed sequentially with water
4. dry with materiala saturated sodium chloride aqueous solution and then dried over anhydrous magnesium sulfate
5. distillationThe solvent was distilled off under reduced pressure
6. customThen, the obtained residue was purified by silica gel column chromatography