反应详情

5-(4-Nitrophenyl)-2(1H)-pyrazinone (0.1 g) was warmed with water (2.5 ml) and 1N sodium hydroxide solution (0.46 ml) to about 70° C. To this solution was added 10% Palladium on charcoal (0.01 g), and subsequently hydrazine hydrate (0.1 ml). The well-stirred mixture was heated for 2 minutes, stirred for a further 2 minutes and filtered whilst hot. The filtrate was taken to pH6 with dilute hydrochloric acid, whereupon the solid was collected by filtration, washed with water and dried to give 5-(4-aminophenyl)-2(1H)-pyrazinone (0.07 g).

1. temperatureThe well-stirred mixture was heated for 2 minutes
2. filtrationfiltered whilst hot
3. filtrationwas collected by filtration
4. washwashed with water
5. customdried