To a microwave vial charged with 2,4,6-trichloropyrimidine (300 mg, 1.64 mmol), 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3-(trifluoromethyl)pyridin-2-amine (518 mg, 1.80 mmol) and cesium carbonate (1.07 g, 3.27 mmol) in acetonitrile/water (4:1, 30 mL) was added 1,1′-bis(diphenylphosphino)ferrocene-palladium(II)dichloride (60 mg, 0.05 mmol) under nitrogen. The mixture was stirred at room temperature for 16 h. The reaction mixture was concentrated in vacuo, and resulting residue was purified by flash column chromatography (15% ethyl acetate in petroleum ether to 50% ethyl acetate in petroleum ether) to provide 5-(2,6-dichloropyrimidin-4-yl)-3-(trifluoromethyl)pyridin-2-amine (300 mg, 59.3% yield). LCMS (ESI): [MH]+=308.7.
