反应详情

温度

90 °C

To a solution of 3-(2,5-dimethylpyrrol-1-yl)-1-(2-fluorophenyl)-5-iodo-1H-pyrazole (1.23 g) in ethanol/water (2/1, 18 ml) were sequentially added hydroxylammonium chloride (4.47 g) and triethylamine (0.9 ml) at room temperature, and the mixture was stirred at 90° C. for 24 hours. This reaction mixture was cooled to room temperature, concentrated under reduced pressure. To the resulting residue was added a 8M aqueous solution of sodium hydroxide, and then the mixture was extracted with ethyl acetate. This organic layer was washed with a saturated aqueous solution of sodium chloride, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=4/1 to 1/1) to give the titled compound (0.61 g).

1. customat room temperature
2. temperatureThis reaction mixture was cooled to room temperature
3. concentrationconcentrated under reduced pressure
4. additionTo the resulting residue was added a 8M aqueous solution of sodium hydroxide
5. extractionthe mixture was extracted with ethyl acetate
6. washThis organic layer was washed with a saturated aqueous solution of sodium chloride
7. dry with materialdried over anhydrous sodium sulfate
8. concentrationconcentrated under reduced pressure
9. customThe resulting residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=4/1 to 1/1)