反应详情

A mixture of 9,9-bis(4-aminophenyl)fluorene (3.5 g, 10 mmol) and 40 ml of acetic acid was stirred and then 4-nitrophthalic anhydride (4.1 g, 21 mmol) was added to the mixture. The resulting mixture was stirred and heated under reflux for 7 hours. After cooling, the beige-colored precipitate was filtered, washed with acetic acid (2×100 ml) and then with water (500 ml). The washed precipitate was recrystallized from dimethyl-fromamide-methanol to provide the title compound as an off-white powder (5.1 g, 73% yield) having a melting point of 360°-363° C.

1. stirringThe resulting mixture was stirred
2. temperatureheated
3. temperatureunder reflux for 7 hours
4. temperatureAfter cooling
5. filtrationthe beige-colored precipitate was filtered
6. washwashed with acetic acid (2×100 ml)
7. customThe washed precipitate was recrystallized from dimethyl-fromamide-methanol