To an oven-dried flask under N2 was added N-(5-bromo-2-fluorophenyl)-2,2,2-trifluoroacetamide (5.6 g, 20 mmol), anhydrous degassed THF (200 mL), dichlorobis(triphenylphosphine)palladium(II) (1.7 g, 2.5 mmol), copper(I) iodide (0.28 g, 1.5 mmol), and trimethylsilylacetylene (7.0 mL, 50 mmol). Next, TEA (27 mL, 197 mmol) was added dropwise and the resulting mixture was heated at 60° C. overnight. The crude reaction mixture was adsorbed to silica gel and purified by column chromatography to afford the desired product (5.3 g, 89%) as an off white solid. ES-LC/MS m/z=302 [M−H]−.
