反应详情

温度

80 °C

2-Bromo-5-trifluoromethylpyridine (410 mg, 2.13 mmol), 2-methoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (500 mg, 1.81 mmol), K2CO3 (749 mg, 5.43 mmol) and PdCl2(dppf) (140 mg, 0.18 mmol) were stirred in DMSO (10 mL). The reaction mixture was degassed, then back-filled with N2. The reaction mixture was stirred at 80° C. in a pre-heated oil bath for 2 hours. After cooling, the reaction was quenched with water and extracted with CH2Cl2. The organic layer was washed with H2O and 5% LiCl, dried with Na2SO4, filtered and concentrated. Flash chromatography (silica gel, hexanes/EtOAc, 100:0 to 50:50) afforded the title compound title compound (337 mg, 62%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.96 (s, 1H), 8.31 (d, J=5.4 Hz, 1H), 8.04 (dd, J=8.3, 2.1 Hz, 1H), 7.87 (d, J=8.3 Hz, 1H), 7.51 (dd, J=5.4, 1.4 Hz, 1H), 7.36 (s, 1H), 3.52 (s, 3H).

1. customThe reaction mixture was degassed
2. additionback-filled with N2
3. temperatureAfter cooling
4. customthe reaction was quenched with water
5. extractionextracted with CH2Cl2
6. washThe organic layer was washed with H2O and 5% LiCl
7. dry with materialdried with Na2SO4
8. filtrationfiltered
9. concentrationconcentrated