反应详情

A solution of 1-(3-methoxycarbonylbenzyl)-5,6,7,8-tetrahydroquinazoline-2,4(1H,3H)-dione (2.3 g, 7.3 mmol) and NaOH (0.59 g, 14.7 mmol) in water-methanol (40 mL and 40 mL) was refluxed for 4 h. After the removal of methanol, the solution was adjusted to pH=2-3 by 3N hydrochloric acid (a.q). The mixture was filtered and the solid was washed by water, and dried to give the title compound (1.8 g, 82% yield) as yellow solid. MS: m/z 301.3 [M+H]+.

1. customAfter the removal of methanol
2. filtrationThe mixture was filtered
3. washthe solid was washed by water
4. customdried