To a solution of 5-iodo-6-methyl-N-(3-(trifluoromethyl)phenyl)isoquinolin-1-amine (0.1680 g, 0.392 mmol) in 10:1 DMF:Water (1.5 ml), charged to a 5 mL microwave reaction vessel, 8-methyl-2-(methylamino)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrido[2,3-d]pyrimidin-7(8H)-one (0.149 g, 0.471 mmol), dichlorobis(triphenyl-phosphine)palladium (ii) (0.0110 g, 0.0157 mmol), and sodium carbonate hydrate (0.102 g, 0.824 mmol) were added. The reaction mixture was stirred at 160° C. for 20 min. The reaction mixture was diluted with EtOAc and partioned with saturated sodium bicarbonate. The aqueous layer was extracted twice with EtOAc. The combined organics were washed with brine, dried over magnesium sulfate and concentrated under vacuum. The resulting residue was loaded on to silica and purified by silica gel chromatography (ISCO 2×12.0 g, 0-6% MeOH in DCM, 45 min.) and HPLC to give 8-methyl-6-(6-methyl-1-(3-(trifluoromethyl)phenylamino)isoquinolin-5-yl)-2-(methylamino)pyrido[2,3-d]pyrimidin-7(8H)-one (0.0381 g, 19.8% yield). MS (M+H)+ 491.
