Water → {(5R)-2-[5-(3-[(1S)-2-Methoxy-1-methylethoxy]-5-{[5-(methylsulfonyl)pyrazin-2-yl]oxy}phenyl)-1H-pyrrol-2-yl]-4,5-dihydro-1,3-oxazol-5-yl}methanol

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Reaction Steps

2-(3-[(1S)-2-Methoxy-1-methylethoxy]-5-{5-[(5R)-5-{[(triisopropylsilyl)oxy]methyl}-4,5-dihydro-1,3-oxazol-2-yl]-1H-pyrrol-2-yl}phenoxy)-5-(methylsulfonyl)pyrazine (496 mg, 0.82 mmol) synthesized in Example (101c) was dissolved in tetrahydrofuran (20 mL), and tetrabutylammonium fluoride (1.0 mol/L tetrahydrofuran solution, 0.82 mL, 0.82 mmol) was added, followed by stirring for 2 hours under nitrogen atmosphere. To the reaction solution, water (40 mL) was added, and extraction was carried out twice with ethyl acetate (40 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: methanol/methylene chloride=0%-5%) to afford the desired compound (133 mg, yield 35%) as a white solid.

Provenance & Evidence