To degassed 1,4-dioxane (13.900 ml) in a flame-dried and argonflushed 50 mL roundbottomed flask were added 5-fluoro-4-(2-methyl-1-(tetrahydro-2H-pyran-4-yl)-1H-imidazol-5-yl)pyrimidin-2-amine (386 mg, 1.39 mmol) and 4-(4-chloro-3-fluorobenzyl)morpholine (320 mg, 1.39 mmol) followed by POTASSIUM TERT-BUTOXIDE (203 mg, 1.81 mmol) whilst stirring. The resulting slurry was flushed with argon followed by addition of TRIS(DIBENZYLIDENEACETONE)DIPALLADIUM(0) (128 mg, 0.14 mmol) and 2-Dicyclohexylphosphino-2',4',6'-tri-iso-propyl-1,1'-biphenyl (200 mg, 0.42 mmol), whereafter the dark violet reaction mixture was again flushed with argon and heated to 102 °C and stirred under argon for 15 h. The completion of the reaction was controlled by HPLC and the crude mixture was cooled to ambient temperatuer and then filtrated through Celite and washed through with dichloromethane. The solution was concentrated in vacuo and dissolved in a minimum amount of DMSO and purified via Preparative HPLC. The pooled fractions were concentrated in vacuo and added HCl. 5-fluoro-N-(2-fluoro-4-(morpholinomethyl)phenyl)-4-(2-methyl-1-(tetrahydro-2H-pyran-4-yl)-1H-imidazol-5-yl)pyrimidin-2-amine (60.0 mg, 9.15 %)
