反应详情

To 40 g of 3,6-dichloro-4-(2-hydroxyethylamino)pyridazine is added slowly with stirring 430 g of 97% hydrazine. The mixture is stirred for 20 hours and cooled. Water is added, and the precipitate, 4-(2-hydroxyethylamino)-6-chloro-3-hydrazino pyridazine (m.p. 168° to 172°C.), is collected by filtration

1. temperaturecooled
2. filtrationthe precipitate, 4-(2-hydroxyethylamino)-6-chloro-3-hydrazino pyridazine (m.p. 168° to 172°C.), is collected by filtration