反应详情

5-{3-[(1S)-2-Methoxy-1-methylethoxy]-5-[4-(methylsulfonyl)phenoxy]phenyl}-1H-pyrrole-2-carboxylic acid (408 mg, 0.94 mmol) synthesized in Example (18a), (2S)-3-amino-1,1,1-trifluoro-2-propanol (177 mg, 1.37 mmol) and 4-dimethylaminopyridine (224 mg, 1.87 mmol) were dissolved in dichloromethane (20 mL), and WSCI•HCl (193 mg, 1.01 mmol) was added at room temperature, followed by stirring for 2 hours under nitrogen atmosphere. The reaction solution was diluted with dichloromethane (200 mL), washed with 1N hydrochloric acid, a saturated aqueous sodium hydrogencarbonate solution and 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=50%-70%) to afford the desired product (339 mg, yield 67%) as a white amorphous substance.

1. washwashed with 1N hydrochloric acid
2. dry with materiala saturated aqueous sodium hydrogencarbonate solution and saturated brine, and subsequently dried over anhydrous magnesium sulfate
3. distillationThe solvent was distilled off under reduced pressure
4. customthe resulting residue was purified
5. washsilica gel column chromatography (elution solvent: ethyl acetate/hexane=50%-70%)