反应详情

To a stirred solution of 2-amino-5-bromo-3-(hydroxymethyl)pyridine (3.0 g, 15 mmole) in methanol (30 mL) was added dimethyl carbonate (5 mL, 60 mmole) and sodium methoxide (25 wt % solution in methanol, 4 mL, 17.4 mmole). The reaction was heated at reflux for 18 hr, cooled to RT, and concentrated to dryness. The remaining residue was triturated with saturated aqueous NH4Cl (50 mL), filtered, washed with cold H2O (50 mL), and dried under vacuum to give the title compound (1.75 g, 51%) as a beige solid: LCMS (ES) m/e 229.0 (M+H)+; 1H NMR (400 MHz, DMSO-d6) δ 10.90 (s, 1H), 8.31 (s, 1H), 7.90 (s, 1H), 5.31 (s, 2H).

1. temperatureThe reaction was heated
2. temperatureat reflux for 18 hr
3. concentrationconcentrated to dryness
4. customThe remaining residue was triturated with saturated aqueous NH4Cl (50 mL)
5. filtrationfiltered
6. washwashed with cold H2O (50 mL)
7. customdried under vacuum