反应详情

To 20 ml of THF, 0.24 g (60 mmol) of 60% sodium hydride was suspended under cooling with ice, and 0.32 g (6.6 mmol) of methyl glycolate, was added thereto, followed by stirring for 15 minutes. To this mixture, 2 g (6.0 mmol) of 3-(2,4-difluoro-5-nitrophenyl)-1-methyl-6-trifluormethyl-2(1H)-pyridone was added, followed by stirring at room temperature for 3 hours. The product was poured into water and extracted with ethyl acetate. After washing with water, the organic layer was dried over anhydrous magnesium sulfate. After distilling off ethyl acetate under reduced pressure, the obtained residue was purified by silica gel column chromatography to obtain 1.57 g (yield: 65%) of the desired product. 1H-NMR (400 MHz, CDCl3) δ value: 3.70(3H,s), 3.84(3H,s), 4.81(2H,s), 6.76(1H,d), 6.78(1H,d), 7.53(1H,d), 8.26(1H,d)ppm.

1. additionwas added
2. stirringby stirring at room temperature for 3 hours
3. extractionextracted with ethyl acetate
4. washAfter washing with water
5. dry with materialthe organic layer was dried over anhydrous magnesium sulfate
6. distillationAfter distilling off ethyl acetate under reduced pressure
7. customthe obtained residue was purified by silica gel column chromatography