反应详情

4.2 g (22.3 mM) of 1-ethyl-3-methyl-quinoxalin-2(1H)-one, 3.97 g (22.3 mM) of N-bromosuccinimide and 53.3 mg of benzoylperoxide in 220 ml of carbon tetrachloride were refluxed for 4 h. The reaction mixture was filtered and the solvent was removed under vacuum. The residue was further purified by silica gel column chromatography, using dichloromethane/cyclohexane (70/30) as eluant to give a solid, which was taken up in methylterbutyloxide. After filtration, 2.4 g of 3-(bromomethyl)-1-ethyl-quinoxalin-2(1H)-one were obtained as a tan solid. Yield: 40.3%.

1. filtrationThe reaction mixture was filtered
2. customthe solvent was removed under vacuum
3. customThe residue was further purified by silica gel column chromatography
4. customto give a solid, which
5. filtrationAfter filtration