反应详情

To a solution of 4-{3E-[5-(1H-indol-2-yl)-2,4-dimethoxyphenyl]acryloyl}benzenesulfonamide (Ex-35E, 0.462 g, 1 mmol), DMAP (0.012 g, 0.1 mmol), and Et3N (0.1 g, 1.05 mmol) in 50 ml of THF, was added Ac2O (0.204 g, 2 mmol). The reaction mixture was stirred at room temperature overnight. The yellow solid precipitated was filtered and redissolved in 50% ethanol in water (50 mL). The clear solution was then adjusted to pH1, and the solid formed was filtered and washed with water to give 0.31 g (62%) the title compound as a red solid, mp 218–220° C. 1H-NMR (300 MHz, DMSO-d6) δ 12.26 (br, 1H), 11.15 (s, 1H), 8.32 (s, 1H), 8.25 (d, J=8 Hz, 2H), 8.04–8.09 (m, 3H), 7.83 (d, J=15 Hz, 1H), 7.49 (d, J=7 Hz, 1H), 7.42 (d, J=8 Hz, 1H), 7.02–7.07 (m, 1H), 6.93–6.97(m, 2H), 6.82 (s, 1H), 4.03 (s, 3H), 3.99 (s, 3H), 1.94 (s, 3H). HRMS (EI) Calcd for C27H24N2O6S: 504.1335 ([M]+); Found: 504.1365.

1. customThe yellow solid precipitated
2. filtrationwas filtered
3. dissolutionredissolved in 50% ethanol in water (50 mL)
4. customthe solid formed
5. filtrationwas filtered
6. washwashed with water