反应详情

温度

-78 °C

300 mg of 1-(4-fluoro-2,3-dihydroindol-1-yl)-2-(4-methoxy-6-morpholin-4-yl-pyrimidin-2-yl)ethanone dissolved in 10 ml of tetrahydrofuran are cooled to −78° C. using a dry ice bath. 2.65 ml of 1N potassium bis(trimethylsilyl)amide in THF are slowly added while maintaining the temperature at −75° C. After 30 minutes of stirring, 0.125 ml of methyl iodide is added and the stirring is continued for 2 h 15. The reaction mixture is diluted with 50 ml of a saturated ammonium chloride solution and 30 ml of ethyl acetate. After settling out, the organic phase is washed with 5 times 15 ml of water, dried over magnesium sulfate, filtered, and then concentrated under reduced pressure. The residue is purified by silica column chromatography, elution being carried out with a 99/01 mixture of dichloromethane and methanol, so as to give 215 mg of 1-(4-fluoro-2,3-dihydroindol-1-yl)-2-(4-methoxy-6-morpholin-4-ylpyrimidin-2-yl)propan-1-one in the form of a white solid, the characteristics of which are the following:

1. temperaturewhile maintaining the temperature at −75° C
2. waitthe stirring is continued for 2 h
3. washthe organic phase is washed with 5 times 15 ml of water
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe residue is purified by silica column chromatography, elution
8. additionbeing carried out with a 99/01 mixture of dichloromethane and methanol