反应详情

温度

20 °C

To a solution of ethyl 1-{[7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indol-3-yl]methyl}-4-piperidinecarboxylate (D79) (308 mg) in tetrahydrofuran (5 mL) and ethanol (5 mL) stirred at 20° C. was added a solution of sodium hydroxide (60 mg) in water (5 mL) in one charge. The reaction mixture was stirred at 20° C. overnight. The reaction mixture was concentrated and then H2SO4 (0.1 M) solution was added dropwise until no further white precipitate was formed. The solid was filtered and recrystallized from EtOAc to afford 1-{[7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indol-3-yl]methyl}-4-piperidinecarboxylic acid (E57) (140 mg). δH (DMSO-d6, 400 MHz): 1.37 (6H, d), 1.49-2.21 (7H, m), 2.84-2.87 (2H, m), 3.65 (5H, s), 4.86-4.93 (1H, m), 7.18 (1H, t), 7.31 (1H, s), 7.44 (1H, dd), 7.46 (1H, d), 7.91 (1H, dd), 8.14 (1H, dd), 8.21 (1H, d), 12.06 (1H, br s). MS (ES): C27H29ClN4O4 requires 508; found 380.1 (M—NC5H9COOH+).

1. additioncharge
2. concentrationThe reaction mixture was concentrated
3. additionH2SO4 (0.1 M) solution was added dropwise until no further white precipitate
4. customwas formed
5. filtrationThe solid was filtered
6. customrecrystallized from EtOAc