反应详情

Acetic anhydride (149 ml) was added dropwise to a mixture composed of the above 1-(2-amino-4,6-dichloropyrimidin-5-yl)-2-(2,2-dimethyl-[1,3]dioxolan-4-yl)ethan-1-ol (74.70 g) and dimethyl sulfoxide (600 ml) at room temperature over 15 minutes under cooling in an ice bath. The reaction mixture was then stirred at the same temperature as above for 18 hours. After the disappearance of the materials had been confirmed, the reaction solution was poured into ice water. The precipitated solid was collected by filtration, so as to obtain the title compound (68.26 g).

1. temperatureunder cooling in an ice bath
2. filtrationThe precipitated solid was collected by filtration