To a solution of 7-(3-bromophenyl)-5-methyl-N-(3,4,5-trimethoxyphenyl)imidazo[5,1-f][1,2,4]triazin-2-amine (Example 9) (27 mg, 0.05 mmol) in DMF (1.0 mL) was added 4-ethynyl-1H-pyrazole (6.9 mg, 0.07 mmol), bis(triphenylphosphine)-palladium (II) chloride (4.0 mg, 0.006 mmol), copper (I) iodide (2.0 mg, 0.01 mmol) and triethyl amine (0.06 mL, 0.43 mmol). In a sealed reaction vessel, the mixture was heated with microwave radiation at 150° C. for 20 minutes. After cooling to room temperature, removed solvent under reduced pressure to give an oily residue which was treated with methanol (5 mL) forming a suspension. Filtered solids and washed with ethyl acetate (10 mL) and DMF (1 mL). The combined filtrate was concentrated under reduced pressure and resulting brown oil was dissolved in ethyl acetate (50 mL), washed with 0.1N HCl (3×50 mL), saturated NaHCO3 aqueous solution (2×50 mL) and brine (1×50 mL). Dried over MgSO4, filtered and solvent removed under reduced pressure to give a light brown oil. Dissolved oil in hot ethyl acetate and silica gel (2.0 g) was added followed by evaporation of the volatiles under reduced pressure. The pre-adsorbed solids were loaded into a solid loading cartridge and subjected to isocratic elution using ethyl acetate:hexanes (50:50) followed by ethyl acetate:methanol (85:15) using a Biotage silica gel cartridge (8.0 g). The appropriate fractions were combined and concentrated under reduced pressure to give 5-methyl-7-[3-(1H-pyrazol-4-ylethynyl)phenyl]-N-(3,4,5-trimethoxyphenyl)imidazo[5,1-f][1,2,4]triazin-2-amine (0.0053 g) as a tan solid. MS m/z 482 (M+1).
