Water → N-{(2S)-2-Hydroxy-3-[(triisopropylsilyl)oxy]propyl}-5-{3-[(1S)-2-methoxy-1-methylethoxy]-5-[(triisopropylsilyl)oxy]phenyl}-1H-pyrrole-2-carboxamide

Participants

Reaction Steps

N-[(2S)-2,3-Dihydroxypropyl]-5-{3-[(1S)-2-methoxy-1-methylethoxy]-5-[(triisopropylsilyl)oxy]phenyl}-1H-pyrrole-2-carboxamide (9.30 g, 17.9 mmol) synthesized in Example (125d) was dissolved in methylene chloride (180 mL), and triisopropylsilyl chloride (4.25 mL, 19.9 mmol), triethylamine (7.45 mL, 53.5 mmol) and 4-dimethylaminopyridine (2.20 g, 18.0 mmol) were added, followed by stirring at room temperature for 2.5 hours under nitrogen atmosphere. Water (300 mL) was added to separate the solution, and 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=10%-35%) to afford the desired compound (10.56 g, yield 87%) as a colorless oil.

Provenance & Evidence