反应详情

温度

100 °C

To a solution of the pyridone 414 (236 mg, 0.63 mmol) in Ph2O (1.3 mL) was added 2-fluoro-4-nitrophenol (197 mg, 1.26 mmol) and K2CO3 (173 mg, 1.26 mmol). The mixture was stirred at 100° C. for 1 h, then at 180° C. for 2 h, cooled and evaporated under reduced pressure. The residue was purified by flash chromatography with a gradient of methanol (2-10%) in dichloromethane to give title compound 415 (81 mg, 26% yield). MS (m/z): 498.0 (M+H). 1H NMR (DMSO-d6) δ (ppm): 9.16 (d, J=3.3 Hz, 1H), 8.66 (d, J=3.3 Hz, 1H), 8.60 (d, J=5.3 Hz, 1H), 8.47 (dd, J=10, 2.5 Hz, 1H), 8.19 (d, J=8.8 Hz, 1H), 8.02 (s, 1H), 7.69 (t, J=8.6 Hz, 1H), 6.98 (d, J=5.3 Hz, 1H), 4.02 (t, J=5.5 Hz, 2H), 3.58-3.43 (m, 4H), 2.59 (t, J=5.5 Hz, 2H), 2.50-2.41 (m, 4H).

1. waitat 180° C. for 2 h
2. temperaturecooled
3. customevaporated under reduced pressure
4. customThe residue was purified by flash chromatography with a gradient of methanol (2-10%) in dichloromethane