反应详情

温度

80 °C

To a stirred solution of 6-methoxy-2-(4-methyl-3-nitrophenyl)imidazo[1,2-b]pyridazine (0.5 g, 1.75 mmol) in ethanol (20 mL) and water (5 mL) containing AcOH (10.5 mmol) is added iron (0.491 g, 8.79 mmol). The mixture is heated at 80° C. for 4 hours, cooled, concentrated under reduced pressure, and sat. aqueous NaHCO3 (100 mL) is added. The mixture is extracted with EtOAc (3×50 mL), the organic layer is collected, dried over Na2SO4, filtered and concentrated to dryness. The crude product is purified via chromatography (hexanes to EtOAc) to afford the title compound (0.328 g, 73%) as a light yellow solid: Rf 0.21 (EtOAc); LCMS (m/z)=255.5 [M+H]+, tR=4.89 min. (10 min run).

1. temperaturecooled
2. concentrationconcentrated under reduced pressure, and sat. aqueous NaHCO3 (100 mL)
3. additionis added
4. extractionThe mixture is extracted with EtOAc (3×50 mL)
5. customthe organic layer is collected
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated to dryness
9. customThe crude product is purified via chromatography (hexanes to EtOAc)