反应详情

4N-Dioxanic hydrogen chloride (48.0 ml) was added dropwise to a solution of 4-(6-acetylaminomethylpyridin-2-yl)-2-(diaminomethyleneamino)thiazole (18.6 g) in methanol (50 ml) at ambient temperature for 5 minutes. After the mixture was stirred at the same temperature for 30 minutes. To the mixture was added a diisopropyl ether and the isolated precipitate was collected by filtration. The precipitate was recrystallized from a mixture of methanol and diisopropyl ether to give 4-(6-acetylaminomethylpyridin-2-yl)-2-(diaminomethyleneamino)thiazole dihydrochloride (16.29 g).

1. filtrationthe isolated precipitate was collected by filtration
2. customThe precipitate was recrystallized from a mixture of methanol and diisopropyl ether