反应详情

Benzyl 5-{3-hydroxy-5-[(1S)-2-methoxy-1-methylethoxy]phenyl}-1H-pyrrole-2-carboxylate (27.35 g, 71.7 mmol) synthesized in Example (106a) was dissolved in methylene chloride (350 mL), and triisopropylsilyl chloride (18.4 mL, 86.0 mmol), triethylamine (30.0 mL, 215 mmol) and 4-dimethylaminopyridine (10.53 g, 86.2 mmol) were added, followed by stirring at room temperature for 4 hours under nitrogen atmosphere. Water (400 mL) was added to separate the solution, and the organic layer was washed with saturated brine, followed by drying 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=3%-20%) to afford the desired product (34.41 g, yield 89%) as a pale yellow oil.

1. customto separate the solution
2. washthe organic layer was washed with saturated brine
3. dry with materialby drying 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=3%-20%)