反应详情

温度

70 °C

To an autoclave there are added 50 g (0.15 moles) of 3,3'-dinitro-4,4'-dichloro benzophenone, 21 g (0.38 moles) of calcium oxide, 1 g of 5% palladium/alumina catalyst (available from Nihon-Engelhardt Co., Ltd.) and 350 ml of 1,2-dichloro ethane. The reaction is carried out for ten hours by introducing hydrogen into the autoclave, with the mixture being stirred at 30°-35° C., to keep the pressure at 10 Kg/cm2.G. After the completion of the reaction, the reaction mixture is heated up to 70° C. and subjected to a hot filtering so as to remove the catalyst and the inorganic salt. On cooling the mixture there are obtained yellow needle-like crystals of 3,3'-diamino benzophenone. The crystals are filtered, washed with 10 ml of 1,2-dichloro ethane and dried. Yield 21.2 g (67%). M.P. 149°-150.5° C. Recrystallization from ethanol gives pure crystals. M.P. 150°-151° C.

1. waitThe reaction is carried out for ten hours
2. customAfter the completion of the reaction
3. filtrationa hot filtering so as
4. customto remove the catalyst
5. temperatureOn cooling the mixture there