反应详情

温度

90 °C

5-Bromo-6-(2,2,2-trifluoroethoxy)-N-((3-(trifluoromethyl)-1,2,4-oxadiazol-5-yl)methyl)nicotinamide (example BP; 100 mg, 223 μmol), p-tolylboronic acid (CAN 5720-05-8; 33 mg, 243 μmol), 1,1′-bis(diphenylphosphino)-ferrocene-palladium(II)dichloride dichloromethane complex (4 mg, 5.27 μmol) and Na2CO3 (35 mg, 330 μmol) were combined with tetrahydrofuran (5 mL) and water (1.5 mL). The reaction mixture was heated to 90° C., stirred for 15 h, cooled down and poured into 25 mL H2O. The mixture was extracted with ethyl acetate (2×25 mL). The organic layers were combined, washed with brine (1×25 mL), dried with MgSO4 and concentrated in vacuo. The crude material was purified twice by flash chromatography (silica gel, 20 g, 0% to 40% ethyl acetate in hexanes) to give 48 mg (46%) of the title compound as a light yellow solid; MS (ESI): 459.090 (M−H)−.

1. temperaturecooled down
2. extractionThe mixture was extracted with ethyl acetate (2×25 mL)
3. washwashed with brine (1×25 mL)
4. dry with materialdried with MgSO4
5. concentrationconcentrated in vacuo
6. customThe crude material was purified twice by flash chromatography (silica gel, 20 g, 0% to 40% ethyl acetate in hexanes)