反应详情

6-Chloro-2-pyridinecarbonitrile (0.70 g, 5.0 mmol) and 4-methoxyphenylboric acid (1.17 g, 7.7 mmol) were dissolved in toluene (60 ml)-ethanol (15 ml), and potassium carbonate (1.75 g, 12.6 mmol) and water (15 ml) were added thereto. The mixture was deairated under reduced pressure for 10 minutes. Tetrakis(triphenylphosphine)palladium (0) (0.29 g, 0.25 mmol) was added to the reaction mixture under argon atmosphere, and the mixture was refluxed for 16 hrs. The reaction mixture was combined with ethyl acetate and water. The organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate. The solvent was evaporated, and the residue was subjected to a silica gel column chromatography. The fractions eluted with hexane-ethyl acetate (4:1, v/v) were collected, concentrated and recrystallized from hexane-ethyl acetate to give the titled compound (0.94 g, 88%).

1. additionwere added
2. temperaturethe mixture was refluxed for 16 hrs
3. washThe organic layer was washed with saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customThe solvent was evaporated
6. washThe fractions eluted with hexane-ethyl acetate (4:1
7. customv/v) were collected
8. concentrationconcentrated
9. customrecrystallized from hexane-ethyl acetate