反应详情

To a solution of 3-[3-(2-methoxy-phenyl)-1H-pyrrolo[2,3-b]pyridin-5-yl]-benzoic acid tert-butyl ester (1.97 g, 4.92 mmol) in acetic acid (4 mL) was added dropwise a premixed solution of hydrogen bromide (33% wt in acetic acid) (889 uL, 4.92 mmol) and mercaptoacetic acid (444 uL, 6.39 mmol). The sides of the flask were rinsed with additional acetic acid (3 mL) and the reaction solution was stirred at ambient temperature for 10 minutes whereupon the product began to precipitate out of solution. The reaction was stirred for an additional hour at ambient temperature. The precipitate was filtered and rinsed well with acetic acid and diethyl ether, affording the title compound as a bright yellow solid (448 mg, 67% yield). 1H NMR (500 MHz, d6-DMSO) δ 12.03 (br s, 1H), 8.58 (s, 1H), 8.21 (d, 2H), 7.99 (d, 1H), 7.94 (d, 1H), 7.76 (d, 1H), 7.61 (m, 2H), 7.31 (t, 1H), 7.14 (d, 1H), 7.06 (t, 1H), 3.83 (s, 3H). MS: m/e 345.1 (M+H+).

1. washThe sides of the flask were rinsed with additional acetic acid (3 mL)
2. customto precipitate out of solution
3. stirringThe reaction was stirred for an additional hour at ambient temperature
4. filtrationThe precipitate was filtered
5. washrinsed well with acetic acid and diethyl ether