Hydrochloric Acid → HCID 67298513, compound

Participants

Reaction Conditions

Reaction Steps

6-Bromo-N,5-dimethyl-2-(pyridin-3-yl)quinazolin-4-amine (350 mg, 1.06 mmol), 2,4-difluorophenylboronic acid (252 mg, 1.595 mmol), K3PO4 (677 mg, 3.19 mmol) and Pd(dppf)Cl2—CH2Cl2 (87 mg, 0.106 mmol) were dissolved in the mixed solvent of 1,4-dioxane (10 mL) and water (1 mL). The resulting mixture was stirred at 90° C. for 2.5 hours under N2. After the reaction was completed, water was added to the mixture and extracted with ethyl acetate. The combined organic layers were washed with water and brine, dried over Na2SO4. After filtration and evaporation, the crude product was purified by column chromatography on NH-silica gel (eluted with isocratic 33% ethyl acetate/67% hexane) to give a white powder. The solid was suspended in ethanol and 5N HCl (1.0 mL) was added to the mixture. The mixture was sonicated for 10 min and the resultant precipitate was collected by filtration and dried to give 139 mg of 6-(2,4-difluorophenyl)-N,5-dimethyl-2-(pyridin-3-yl)quinazolin-4-amine dihydrochloride as a pale yellow powder in a 30% yield.

Provenance & Evidence