反应详情

tert-Butyl 2-(4-(5-methyl-3-oxo-1H-imidazo[1,5-c]imidazol-2(3H)-yl)-1-piperidinyl)-2-oxo-1-phenylethylcarbamate (13 g) obtained in Example 50a) was dissolved in concentrated hydrochloric acid (30 ml) and ethanol (30 ml). The reaction mixture was mixed at room temperature for 30 minutes, and then the solvent was distilled off under reduced pressure. Water in the residue was removed by azeotropy with ethanol to obtain the title compound as pale yellow powder (12 g, quantitative).

1. additionThe reaction mixture was mixed at room temperature for 30 minutes
2. distillationthe solvent was distilled off under reduced pressure
3. customWater in the residue was removed by azeotropy with ethanol