反应详情

A mixture of 26 g of 3-nitro-4-chloro-benzophenone, 20 ml. of ethanol and 35 ml. of diisobutylamine is heated to 80° to 85 °C under stirring, and the reaction mixture is kept at this temperature for 6 hours. When the reaction is over the ethanol is distilled off under reduced pressure, and 260 ml. of petroleum ether (b.p.: 40° to 100 °C) are added to the solid residue. The separated diisobutylamine hydrochloride is removed by filtration. The filtrate is evaporated, and the residue is recrystallized from ethanol. 32.7 g. of 3-nitro-4-(N,N-diisobutylamino)-benzophenone are obtained; m.p.: 80°-81 °C.

1. distillationis distilled off under reduced pressure, and 260 ml
2. additionof petroleum ether (b.p.: 40° to 100 °C) are added to the solid residue
3. customThe separated diisobutylamine hydrochloride is removed by filtration
4. customThe filtrate is evaporated
5. customthe residue is recrystallized from ethanol