反应详情

To a solution of methyl 3-(6-(4-chlorophenyl)-1,5-dimethyl-2,4-dioxo-1,2-dihydrothieno[2,3-d]pyrimidin-3(4H)-yl)propanoate (25 mg, 0.0636 mmol) in CCl4 (1 mL) was added NBS (11.3 mg, 0.0636 mmol) followed by benzoyl peroxide (2 mg). The reaction was heated at reflux for 4 h, cooled to RT then diluted with DCM (10 mL). The mixture was washed with aq. NaHCO3 (5 mL) and brine (10 mL). The organic layer was dried over Na2SO4 and concentrated to give methyl 3-(5-(bromomethyl)-6-(4-chlorophenyl)-1-methyl-2,4-dioxo-1,2-dihydrothieno[2,3-d]pyrimidin-3(4H)-yl)propanoate (30 mg, 100% yield). LCMS: MH+ 473 and TR=1.907 min. Used without further purification.

1. temperatureThe reaction was heated
2. temperatureat reflux for 4 h
3. washThe mixture was washed with aq. NaHCO3 (5 mL) and brine (10 mL)
4. dry with materialThe organic layer was dried over Na2SO4
5. concentrationconcentrated