To a vial is added 6-bromo-1,2,3,4-tetrahydro-[1,8]naphthyridine, Intermediate A (144 mg, 0.68 mmol), bis(pinacolato)diboron (223 mg, 0.88 mmol), potassium acetate (200 mg, 2 mmol) and [1,1′-bis(diphenylphosphino)ferrocene)dichloropalladium(II) (50 mg, 0.07 mmol) in 5 ml of 1,4-dioxane. The reaction mixture is stirred at 120° C. under Ar for 2 hours. The reaction mixture is cooled down to room temperature, followed by the addition of 2-(3-bromo-5-fluoro-pyridin-4-yl)-propan-2-ol (190 mg, 0.81 mmol), 2M Na2CO3 (0.67 ml, 1.35 mmol) and [1,1′-bis(diphenylphosphino)ferrocene)dichloropalladium(II) (25 mg, 0.034 mmol). The reaction mixture is stirred under Ar at 120° C. for 3 hours. The reaction mixture is concentrated. The residue is diluted with EtOAc, washed with water, brine, dried over anhydrous Na2SO4, filtered and concentrated to give the crude product. Purification by the flash column chromatography affords 72 mg of 2-[3-fluoro-5-(5,6,7,8-tetrahydro-[1,8]naphthyridin-3-yl)-pyridin-4-yl]-propan-2-ol.
