反应详情

温度

0 °C

To a solution of N-{2-[4-(6-chloro-3-formyl-1H-indol-5-yl)phenoxy]ethyl}acetamide (80 mg, 0.23 mmol) in acetonitrile (3 mL) was added tert-butanol (3 mL) and 2-methyl-2-butene (1.89 mL). The reaction mixture was cooled to 0° C., and treated with a solution of sodium chlorite (452 mg, 6.74 mmol) and sodium phosphate monobasic (930 g, 6.74 mmol) in water (3 mL) dropwise. The reaction mixture was stirred at room temperature for 40 h. The reaction mixture was quenched with sodium sulfite and concentrated in vacuo to give a solid. The crude product was washed with DMF and the filtrate was concentrated in vacuo to give a brown residue, which was purified by prep-HPLC to give 5-{4-[2-(acetylamino)ethoxy]phenyl}-6-chloro-1H-indole-3-carboxylic acid (22 mg, 26%) as an off-white solid. MS (ES+) 373.1 (M+H)+. 1H NMR (400 MHz, DMSO-d6) δ 11.93 (s, 1 H), 8.14 (br. s., 1 H), 8.06 (s, 1 H), 7.93 (s, 1 H), 7.62 (s, 1 H), 7.34 (d, 2 H), 7.02 (d, 2 H), 4.03 (t, 2 H), 3.45-3.43 (m, 2 H), 1.84 (s, 3 H).

1. customThe reaction mixture was quenched with sodium sulfite
2. concentrationconcentrated in vacuo
3. customto give a solid
4. washThe crude product was washed with DMF
5. concentrationthe filtrate was concentrated in vacuo
6. customto give a brown residue, which
7. customwas purified by prep-HPLC