反应详情

温度

55 °C

To a degassed solution of 2-bromo-6-chloro-4-methyl-pyridine (900 mg, 4.37 mmol), 4-trifluoromethylbenzeneboronic acid (830 mg, 4.37 mmol), 2N Na2CO3 (4 mL) in DME (40 mL) was added tetrakis(triphenylphosphine)palladium (320 mg, 0.3 mmol) under argon. The mixture was heated to 55° C. for 5 h, cooled to room temperature, diluted with water, and extracted with methylene chloride (3×). The organic solution was washed with brine, dried over Na2SO4, and concentrated. The residue was purified by column chromatography on silica gel (10-25% methylene chloride in heptane) to give the product as an off white solid (800 mg, 68%). 1H NMR (300 MHz, CDCl3) δ 8.09 (d, J=7.91 Hz, 2H), 7.71 (d, J=8.29 Hz, 2H), 7.49 (s, 1H), 7.16 (s, 1H), 2.43 (s, 3H). MS m/e 272.1 (M+H).

1. temperaturecooled to room temperature
2. extractionextracted with methylene chloride (3×)
3. washThe organic solution was washed with brine
4. dry with materialdried over Na2SO4
5. concentrationconcentrated
6. customThe residue was purified by column chromatography on silica gel (10-25% methylene chloride in heptane)