反应详情

A suspension of 2-amino-4-methyl-5-(4-methylpyridin-2-yl)thiazole (205 mg), ethyl acetimidate hydrochloride (370 mg) and diisopropylethylamine (0.697 ml) in N,N-dimethylformamide (4 ml) was stirred at ambient temperature for 10 days and evaporated under reduced pressure. To the residue was added hydrogen chloride in ethyl acetate (4N, 4 ml) and crystallized from methanol and ethyl acetate. The precipitate was collected by filtration and recrystallized from methanol and 2-propanol to give N-(4-methyl-5-(4-methylpyridin-2-yl)thiazol-2-yl)acetamidine dihydrochloride (220 mg).

1. customevaporated under reduced pressure
2. additionTo the residue was added hydrogen chloride in ethyl acetate (4N, 4 ml)
3. customcrystallized from methanol and ethyl acetate
4. filtrationThe precipitate was collected by filtration
5. customrecrystallized from methanol and 2-propanol