反应详情

To a solution of 2-[(4-(1,3-benzodioxol-5-yl)-5-{bis[(5-isopropyl-2-pyridinyl)sulfonyl]amino}-1-methyl-1H-pyrazol-3-yl)oxy]ethyl acetate (Preparation 67) (9.0 g) in ethanol (200 ml) was added 2.0M aqueous sodium hydroxide (25 ml). The reaction was stirred for 30 min and concentrated under reduced pressure and the residue was poured onto 0.5M aqueous citric acid (300 ml). This was extracted with ethyl acetate (3×80 ml) and dried over magnesium sulfate. The solvent was removed under reduced pressure and the crude residue was purified by silica (230 g) chromatography eluting with a gradient of 50% ethyl acetate in hexane to 70% ethyl acetate in hexane to afford the title product as a white solid (5.0 g)

1. concentrationconcentrated under reduced pressure
2. additionthe residue was poured onto 0.5M aqueous citric acid (300 ml)
3. extractionThis was extracted with ethyl acetate (3×80 ml)
4. dry with materialdried over magnesium sulfate
5. customThe solvent was removed under reduced pressure
6. customthe crude residue was purified by silica (230 g) chromatography
7. washeluting with a gradient of 50% ethyl acetate in hexane to 70% ethyl acetate in hexane