反应详情

温度

50 °C

3,7-Bis-(4-bromo-phenyl)-5,7-dihydro-1H,3H-pyrrolo[2,3-f]indole-2,6-dione (7.250 g, 14.55 mmol) (1.2) was dissolved into acetic acid (215 cm3), chloranil (7.157 g, 29.11 mmol) is added and the reaction mixture heated to 50° C. for 16 hours. After cooling down, the resulting precipitate is filtered and washed with acetic acid. The recovered solid is purified by trituration with nitrobenzene (120 cm3) at 200° C. followed by trituration with diethyl ether (100 cm3) to obtain the pure product (4.512 g, Yield: 63%). NMR (1H, 300 MHz, DMSO): δ 10.37 (br, 2H), 7.71 (d, J=8.7 Hz, 4H), 7.61 (d, J=8.7 Hz, 4H), 6.34 (s, 2H).

1. additionis added
2. temperatureAfter cooling down
3. filtrationthe resulting precipitate is filtered
4. washwashed with acetic acid
5. customThe recovered solid is purified by trituration with nitrobenzene (120 cm3) at 200° C.