反应详情

N-[(2R,3R)-1,3-Dihydroxybutan-2-yl]-5-(3-{[(2S)-1-methoxypropan-2-yl]oxy}-5-[(tripropan-2-ylsilyl)oxy]phenyl)-1H-pyrrole-2-carboxamide (2.10 g, 3.93 mmol) synthesized in Example (110a) was dissolved in methylene chloride (50 mL), and triisopropylchlorosilane (1.50 mL, 7.01 mmol), 4-dimethylaminopyridine (1.50 g, 12.27 mmol) and triethylamine (5.00 mL, 35.87 mmol) were added, followed by stirring at room temperature for 1 day under nitrogen atmosphere. To the reaction solution, a saturated aqueous ammonium chloride solution (50 mL) was added, and extraction was carried out with methylene chloride (50 mL). The organic layer was washed with saturated brine, and subsequently dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified using silica gel column chromatography (elution solvent: ethyl acetate/hexane=25-40%) to afford the desired compound (2.52 g, yield 93%) as a white solid.

1. extractionextraction
2. washThe organic layer was washed with saturated brine
3. dry with materialsubsequently dried over anhydrous magnesium sulfate
4. distillationThe solvent was distilled off under reduced pressure
5. customthe resulting residue was purified
6. washsilica gel column chromatography (elution solvent: ethyl acetate/hexane=25-40%)