反应详情

4-Chloro-5-phenyl-2-pyridin-2-ylpyrimidine (4-2; 0.15 g, 0.56 mmol), (4-formylphenyl)boronic (0.126 g, 0.840 mmol), bis(tri-t-butylphosphine)palladium(0) (0.014 g, 0.028 mmol) and anhydrous KF (0.107 g, 1.85 mmol) were stirred in 2 ml anhydrous dioxane under N2. The reaction was heated to reflux. After 15 min an additional sample of bis(tri-t-butylphosphine)palladium(0) (0.014 g, 0.028 mmol) was added and the reaction was heated at reflux overnight. The reaction was cooled and diluted with water. The mixture was extracted 3× with DCM. The combined organic phases was dried over Na2SO4, filtered and concentrated. The residue was purified by flash column chromatography (dissolved sample in DCM, eluted with 98:2 DCM/EA) and provided an impure sample of 4-(5-phenyl-2-pyridin-2-ylpyrimidin-4-yl)benzaldehyde (4-3) that was used directly in the next transformation.

1. temperatureThe reaction was heated to reflux
2. temperaturethe reaction was heated
3. temperatureat reflux overnight
4. temperatureThe reaction was cooled
5. extractionThe mixture was extracted 3× with DCM
6. dry with materialThe combined organic phases was dried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated
9. customThe residue was purified by flash column chromatography (dissolved sample in DCM, eluted with 98:2 DCM/EA)