Water → HCID 66681347, compound

Participants

Reaction Steps

t-Butyl 2-bromo-5-{3-[(1S)-2-methoxy-1-methylethoxy]-5-[4-(methylsulfonyl)phenoxy]phenyl}-1H-pyrrole-1-carboxylate (102.9 mg, 0.177 mmol) synthesized in Example (13c) was dissolved in toluene (5 mL), and 2-(tri-n-butylstannyl)oxazole (133.7 mg, 0.373 mmol) and tetrakis(triphenylphosphine) palladium (20.5 mg, 0.0177 mmol) was added, followed by heating to reflux for 18 hours under nitrogen atmosphere. The reaction solution was cooled to room temperature, water (20 mL) was added thereto, and extraction was carried out with ethyl acetate (20 mL). The organic layer was washed with saturated brine, and subsequently dried over sodium 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=35%-55%) to afford t-butyl 2-{3-[(1S)-2-methoxy-1-methylethoxy]-5-[4-(methylsulfonyl)phenoxy]phenyl}-5-(1,3-oxazol-2-yl)-1H-pyrrole-1-carboxylate.

Provenance & Evidence