反应详情

温度

95 °C

4-(4-Chloro-2-fluorophenoxy)-7-(3-(1,1-dioxothiomorpholino)propoxy)-6-methoxyquinazoline (3.5 g, 7 mmol) was dissolved in 2M aqueous hydrochloric acid (56 ml) and heated at 95° C. for 2 hours. The cooled reaction mixture was treated with solid sodium hydrogen carbonate solution to give a thick paste which was diluted with water and filtered. The solid was transferred to a flask and azeotroped with toluene twice to give a dry solid. The solid was flash chromatographed on silica eluting with dichloromethane and methanol (95/5). The relevant fractions were combined and evaporated to give 7-(3-(1,1-dioxothiomorpholino)propoxy)-6-methoxy-3,4-dihydroquinazolin-4-one (2.26 g, 87%) as a white solid.

1. customThe cooled reaction mixture
2. customto give a thick paste which
3. filtrationfiltered
4. customThe solid was transferred to a flask
5. customazeotroped with toluene twice
6. customto give a dry solid
7. customchromatographed on silica eluting with dichloromethane and methanol (95/5)
8. customevaporated