反应详情

温度

190 °C

To a solution of 5-amino-2,4-difluorophenol (0.3 g, 2.07 mmol) in DMSO (2 mL) was added potassium t-butoxide (0.23 g, 2.07 mmol) at RT. After stirring for 1 h, 3,5-dichloropyridine (0.37 g, 2.5 mmol) and potassium carbonate (0.14 g, 1 mmol) were added and the mixture was heated to 190° C. for 1 h in microwave reactor. Water (30 mL) was added, and the product was extracted with EtOAc (2×35 mL) and the combined organic layers were washed with brine solution, dried (Na2SO4), concentrated in vacuo and purified by chromatography (EtOAc/hexane) to afford 5-(5-chloropyridin-3-yloxy)-2,4-difluorobenzenamine (0.35 g, 66% yield) as a solid. 1H NMR (400 MHz, Acetone-d6) δ 8.33-8.30 (m, 2H), 7.44 (t, J=2.4 Hz, 1H), 7.13 (t, J=10.8 Hz, 1H), 6.78 (t, J=8.4 Hz, 1H), 4.85 (brs, 2H); MS (ESI) m/z: 257.0 (M+H+).

1. extractionthe product was extracted with EtOAc (2×35 mL)
2. washthe combined organic layers were washed with brine solution
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated in vacuo
5. custompurified by chromatography (EtOAc/hexane)