反应详情

温度

80 °C

5-Bromo-6-(2,2,2-trifluoroethoxy)-3-pyridinecarboxylic acid methyl ester (CAN 1211589-51-3; 4.0 g; 12.7 mmol) and 4-chloro-3-methylphenylboronic acid (CAN 161950-10-3; 3.26 g, 19.1 mmol) were combined in DMSO (100 mL) to give a white suspension. To this suspension was added, Na2CO3 (4.05 g, 38.2 mmol) in water (10 mL) and 1,1′-bis(diphenylphosphino)-ferrocene-palladium(II)dichloride dichloromethane complex (1.04 g, 1.27 mmol). The reaction mixture was heated to 80° C. and stirred for 2.5 h, cooled and poured into 200 mL ethyl acetate:heptane (1:1) and extracted with H2O (3×100 mL) and brine (1×150 ml). The aqueous layer was extracted with EtOAc:Heptane (1:1) (1×200 mL). The organic layers were combined, dried with Na2SO4 and concentrated in vacuo. The crude material was purified by flash chromatography (silica gel, 70 g, 0% to 100% ethyl acetate in heptane) to yield 4.86 g (90%) of the title compound as light red solid; MS (EI): 360.1 (M+H)+.

1. customto give a white suspension
2. additionTo this suspension was added
3. temperaturecooled
4. extractionextracted with H2O (3×100 mL) and brine (1×150 ml)
5. extractionThe aqueous layer was extracted with EtOAc:Heptane (1:1) (1×200 mL)
6. dry with materialdried with Na2SO4
7. concentrationconcentrated in vacuo
8. customThe crude material was purified by flash chromatography (silica gel, 70 g, 0% to 100% ethyl acetate in heptane)