反应详情

To a stirred solution of 2-((5-bromo-3-chloropyridin-2-yl)methyl)isoindoline-1,3-dione (0.23 g, 0.65 mmol) in toluene (10 mL) were added Pd(PPh3)4 (3.7 mg, 0.003 mmol), K2CO3 (0.269 g, 1.95 mmol) and vinyl boronic anhydride pyridine complex (0.78 g, 3.28 mmol), and the reaction mixture was heated at reflux for 16 h. The reaction mixture was filtered, and the filtrate was washed with H2O and brine, dried over anhydrous Na2SO4, and concentrated under reduced pressure. Purification by flash column chromatography (20-30% EtOAc in hexane) afforded the title compound as an off-white solid (0.2 g, 65%): 1H NMR (400 MHz, CDCl3) δ 8.30 (s, 1H), 7.91 (m, 2H), 7.77 (m, 3H), 7.72 (m, 1H), 6.63 (m, 1H), 5.79 (d, J=16.0 Hz, 1H), 5.39 (d, J=16.0 Hz, 1H), 5.12 (s, 2H); ESIMS m/z 299.20 ([M+H]+).

1. temperaturethe reaction mixture was heated
2. temperatureat reflux for 16 h
3. filtrationThe reaction mixture was filtered
4. washthe filtrate was washed with H2O and brine
5. dry with materialdried over anhydrous Na2SO4
6. concentrationconcentrated under reduced pressure
7. customPurification by flash column chromatography (20-30% EtOAc in hexane)