反应详情

2-Chloro-3-nitropyridine (4.37 g, 27.6 mmol), 4-vinylphenylboronic acid (4.5 g, 30.4 mmol), tetrakis(triphenylphosphine)palladium (0) (3.19 g, 2.8 mmol), and potassium carbonate (11.4 g, 82.8 mmol) were added to anhydrous 1,4-dioxane (60 ml). The reaction mixture was refluxed for 24 hours. The reaction mixture was cooled to room temperature, filtered with a Celite pad, and then concentrated under reduced pressure. The resulting residue was purified with silica gel column chromatography and then crystallized with ethyl ether to give 4.9 g of the titled compound as a white solid. (Yield: 79%) The product was used in the subsequent step without further purification.

1. temperatureThe reaction mixture was refluxed for 24 hours
2. filtrationfiltered with a Celite pad
3. concentrationconcentrated under reduced pressure
4. customThe resulting residue was purified with silica gel column chromatography
5. customcrystallized with ethyl ether