Potassium Carbonate → 5-(5-Phenyl-4-(pyridin-2-ylmethylamino)quinazolin-2-yl)nicotinaldehyde

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-chloro-5-phenyl-N-(pyridin-2-ylmethyl)quinazolin-4-amine (2 g, 5.7 mmol) in 1,4-dioxane (40 mL) and H2O (8 mL) under nitrogen was added 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)nicotinaldehyde (1.48 g, 6.30 mmol), and potassium carbonate (2.39 g, 17.0 mmol). Upon completion of addition, the reaction mixture was degassed with nitrogen for 15 min and then (1,1′-bis(diphenylphosphino)ferrocene)palladium (II) chloride dichloromethane complex (0.46 mg, 0.050 mmol) was added. The reaction mixture was again degassed for 10 min with nitrogen. At the conclusion of this period, the reaction mixture was stirred at 90° C. for 16 h, then allowed to cool to room temperature and quenched by the addition of water. The reaction mixture was transferred to a separation funnel and the aqueous layer was extracted with ethyl acetate. The combined organic portions were washed with water and saturated NaCl, dried over Na2SO4, filtered and concentrated under reduced pressure. The resulting concentrate was purified by silica gel column chromatography using 2.7% MeOH in DCM as eluent to afford 5-(5-phenyl-4-(pyridin-2-ylmethylamino)quinazolin-2-yl)nicotinaldehyde (1.8 g, 100% yield) as an off-white solid. LCMS Method Y: retention time 1.99 min; [M+1]=418.4.

Provenance & Evidence