反应详情

To a solution of ethyl 4-[7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1H-indol-3-yl]-4-oxobutanoate (D52) (20 mg) in THF (2 mL) was added aqueous NaOH (2 M, 1 mL), the reaction was stirred at room temperature overnight. The mixture was acidified with aqueous HCl (2M) to pH 4-5, and then partitioned with ethyl acetate (10 mL) and water (10 mL). The organic phase was washed with water (10 mL) and brine (10 mL), dried over anhydrous sodium sulphate and evaporated to give the crude product, which was purified by Mass Directed Auto Prep to afford 4-[7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1H-indol-3-yl]-4-oxobutanoic acid (E33) (12 mg). δH (DMSO-d6, 400 MHz): 1.37 (6H, d), 2.59 (2H, t), 3.20 (2H, t), 4.91 (1H, m), 7.41 (1H, t), 7.47 (1H, d), 8.04 (1H, dd), 8.22 (1H, dd), 8.36 (1H, d), 8.41 (1H, d), 8.44 (1H, dd), 11.81 (1H, br s). MS (ES): C23H20ClN3O5 requires 453; found 454.2 (M+H+).

1. custompartitioned with ethyl acetate (10 mL) and water (10 mL)
2. washThe organic phase was washed with water (10 mL) and brine (10 mL)
3. dry with materialdried over anhydrous sodium sulphate
4. customevaporated
5. customto give the crude product, which
6. customwas purified by Mass Directed Auto Prep