反应详情

温度

78 °C

LAH (1M in THF; 6.12 ml, 6.12 mmol) was added slowly to a −78 C cooled solution of ethyl 2-(5-azido-3-bromo-7-iodo-5H-chromeno[2,3-b]pyridin-5-yl)acetate (2.10 g, 4.08 mmol) in THF (40.8 ml). The reaction mixture was stirred at 78° C. for 15 min, and the reaction mixture was allowed to warm to RT and stirred for additional 30 min. The reaction mixture was cooled to 0° C., quenched with sodium sulfate decahydrate (2.90 g, 20.38 mmol) and allowed to stir 20 min. The solution was filtered through a pad of celite, the filter cake was eluted with 10% MeOH/DCM and the filtrate was concentrated. The residue was purified via flash chromatography (0-25% EtOAc/CH2Cl2) to afford 2-(5-amino-3-bromo-7-iodo-5H-chromeno[2,3-b]pyridin-5-yl)ethanol as a yellow solid.

1. temperatureto warm to RT
2. stirringstirred for additional 30 min
3. temperatureThe reaction mixture was cooled to 0° C.
4. stirringto stir 20 min
5. filtrationThe solution was filtered through a pad of celite
6. washthe filter cake was eluted with 10% MeOH/DCM
7. concentrationthe filtrate was concentrated
8. customThe residue was purified via flash chromatography (0-25% EtOAc/CH2Cl2)