Cesium carbonate → 6-(3-Chloro-phenyl)-5-cyclopropyl-pyridine-2-carboxylic acid methyl ester

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6-Bromo-5-cyclopropyl-pyridine-2-carboxylic acid methyl ester (0.1 g, 0.4 mmol), 3-chlorophenylboronic acid (CAN 63503-60-6, 0.08 g, 0.5 mmol), 1,1′-bis(diphenylphosphino)-ferrocene-palladium(II)dichloride methylene chloride adduct (CAN 95464-05-4, 50 mg) and cesium carbonate (CAN 534-17-8, 0.2 g, 0.6 mmol) was added into 1,4-dioxane (10 mL) under nitrogen atmosphere. The mixture was stirred for 12 h at 110° C. Subsequently, the mixture was concentrated to give crude product. The crude product was purified by a flash column chromatography (silica gel, 5 g, 20% ethyl acetate in petroleum ether) to give product (80 mg, 71%); MS: (EI) m/e 288.1 [M+H]+.

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