反应详情

Sodium hydroxide (36 mg) was added to a solution of ethyl 3-(5-{5-[6-[(1-methylethyl)oxy]-5-(trifluoromethyl)-3-pyridinyl]-1,2,4-oxadiazol-3-yl}-1H-indol-2-yl)propanoate (D117) (89 mg) in THF (1 mL), isopropanol (1 mL) and water (0.5 mL). The mixture was stirred at room temperature until LCMS showed no starting material. The mixture was neutralized with 2 M HCl till pH ˜6.0. The crude product was purified by Mass Directed Auto Prep to afford of 3-(5-{5-[6-[(1-methylethyl)oxy]-5-(trifluoromethyl)-3-pyridinyl]-1,2,4-oxadiazol-3-yl}-1H-indol-2-yl)propanoic acid (E92) (40 mg). δH (DMSO-d6, 400 MHz): 1.39 (6H, d), 2.70 (2H, t), 2.99 (2H, t), 5.55 (1H, m), 6.35 (1H, s), 7.46 (1H, d), 7.77 (1H, dd), 8.23 (1H, s), 8.64 (1H, d), 9.22 (1H, d), 11.36 (1H, s), 12.25 (1H, s); MS (ES): C22H19F3N4O4 requires 460; found 461.2 (M+H+).

1. customThe crude product was purified by Mass Directed Auto Prep