反应详情

To a solution of 5-amino-1-methyl-4-nitrosopyrazole (1 g) in water (40 ml) were added concentrated sulfuric acid (0.423 ml) and palladium on carbon (0.3 g) under a hydrogen atmosphere. The mixture was stirred overnight. The reaction mixture was filtered, and the filtrate was evaporated in vacuo. To the residue was added isopropyl alcohol, and the resulting precipitate was collected by filtration to give 4,5-diamino-1-methylpyrazole sulfuric acid salt (1.71 g).

1. filtrationThe reaction mixture was filtered
2. customthe filtrate was evaporated in vacuo
3. additionTo the residue was added isopropyl alcohol
4. filtrationthe resulting precipitate was collected by filtration