反应详情

1,1′-Bis(diphenylphosphino)ferrocene]dichloropalladium(II)-dichloromethane complex (5 g, 6 mmol) was added to a degassed mixture of 2-(4-methoxy-2-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (30 g, 120 mmol), 5-bromo-4,6-dimethylpyrimidine (22.5 g, 120 mmol), and potassium phosphate (76.3 g, 359 mmol) in 1,4-dioxane (300 mL) and water (150 mL). The reaction mixture was heated at reflux for 4 hours, whereupon it was filtered and concentrated in vacuo. Purification via silica gel chromatography (Gradient: ethyl acetate in petroleum ether) provided the product as a brown solid. Yield: 25 g, 110 mmol, 92%. LCMS m/z 229.3 [M+H+]. 1H NMR (300 MHz, CDCl3) δ 8.95 (s, 1H), 6.94 (d, J=8.2 Hz, 1H), 6.87-6.89 (m, 1H), 6.84 (dd, J=8.3, 2.5 Hz, 1H), 3.86 (s, 3H), 2.21 (s, 6H), 1.99 (s, 3H).

1. temperatureThe reaction mixture was heated
2. temperatureat reflux for 4 hours, whereupon it
3. filtrationwas filtered
4. concentrationconcentrated in vacuo
5. customPurification via silica gel chromatography (Gradient: ethyl acetate in petroleum ether)