反应详情

温度

130 °C

7.5 g (29.8 mmole) (E,E)-1-(2-nitrophenyl)-4-phenyl-1,3-butadiene and 2.9 g (29.9 mmole) maleic acid imide are heated in 10 ml toluene to 130° C. for 12 hours. After addition of 1.5 g (15.5 mmole) maleic acid imide it is heated at 130° C. for a further 24 hours. After cooling, it is diluted with 40 ml dichloromethane, the product filtered off, and crystallized from ethanol. One obtains 1,3,3a,4,7,7a-hexahydro-4-(2-nitrophenyl)-1,3-dioxo-7-phenyl-2H-isoindole in the form of pale yellow crystals, which decompose from 200°-208° C.

1. temperatureAfter cooling
2. filtrationthe product filtered off
3. customcrystallized from ethanol