To a solution of 2,4-dichloro-5-fluoropyrimidine (0.478 g, 2.86 mmol) and 4-carboxyphenyl boronic acid methyl ester (0.516 g, 2.86 mmol) in 5 mL of ethyleneglycol dimethyl ether was added Pd(PPh3)4 under argon, followed by 2N Na2CO3 and the resulting mixture purged with argon for 2 minutes. The resulting mixture was sealed and heated at 85° C. overnight. After 18 hours, the reaction was diluted with 20 mL of ethyl acetate and washed with H2O. The organic layer was concentrated and purified by chromatography (Silica, 10% ethyl acetate in hexanes) to afford 4-(2-chloro-5-fluoropyrimidin-4-yl)-benzoic acid methyl ester (0.35 g, 46%) as a white solid. LCMS: ES+=267.
