反应详情

温度

80 °C

To a mixture of 6-chloro-4-[2-(tetrahydro-pyran-2-yloxy)-ethoxy]-nicotinonitrile (4.8 g, 16.62 mmol) and 2-bromo-5-hydroxy-benzaldehyde (4.01 g, 19.94 mmol) in DMF (30 mL) was added potassium carbonate (3.44 g, 24.93 mmol). The resulting mixture was heated at 80° C. overnight. DMF was removed under reduced pressure and the residue was diluted with EtOAc (200 mL). The organic layer was washed with water (20 mL) and brine (3×20 mL), dried over Na2SO4, filtered, and concentrated to give white solid. Purification was accomplished by flash chromatography on silica gel using 2-25% EtOAc/hexanes as gradient elution yielding the title compound (4.8 g, 64%) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 10.19 (s, 1H), 8.46 (s, 1H), 7.88 (d, J=8.6 Hz, 1H), 7.60 (d, J=2.7 Hz, 1H), 7.49 (dd, J=8.6, 2.7 Hz, 1H), 7.09 (s, 1H), 4.75-4.67 (m, 1H), 4.49-4.45 (m, 2H), 4.00-3.89 (m, 1H), 3.85-3.74 (m, 2H), 3.49-3.41 (m, 1H), 1.78-1.53 (m, 2H), 1.39-1.53 (m, 4H).

1. customDMF was removed under reduced pressure
2. additionthe residue was diluted with EtOAc (200 mL)
3. washThe organic layer was washed with water (20 mL) and brine (3×20 mL)
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customto give white solid
8. customPurification
9. washwas accomplished by flash chromatography on silica gel using 2-25% EtOAc/hexanes as gradient elution