反应详情

(5S)-2-(5-{3-[(1S)-2-Methoxy-1-methylethoxy]-5-[4-(methylsulfonyl)phenoxy]phenyl}-1H-pyrrol-2-yl)-5-{[(triisopropylsilyl)oxy]methyl}-4,5-dihydro-1,3-oxazole (180 mg, 0.262 mmol) synthesized in Example (35c) was dissolved in tetrahydrofuran (10 mL), and tetrabutylammonium fluoride (1M tetrahydrofuran solution, 0.53 mL, 0.53 mmol) was added, followed by stirring at room temperature for 30 minutes under nitrogen atmosphere. Water (10 mL) was added, and extraction was carried out with ethyl acetate (20 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=60%-100%) to afford the desired compound (103 mg, yield 79%) 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=60%-100%)