Potassium Carbonate → 1-[1-(4-Cyano-phenyl)-ethyl]-2-methyl-4-oxo-2'-trifluoromethyl-1,4-dihydro-[3,4']bipyridinyl-5-carboxylic acid methylamide

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To a solution of 5-bromo-1-[1-(4-cyano-phenyl)-ethyl]-6-methyl-4-oxo-1,4-dihydro-pyridine-3-carboxylic acid methylamide (preparation 9, 240 mg, 0.641 mmol), 2-(trifluoromethyl)pyridine-4-boronic acid (148 mg, 0.78 mmol), palladium (0) tetrakis(triphenylphosphine) (79 mg, 0.068 mmol) in acetonitrile (4 mL) is added 2 M aqueous K2CO3 solution (0.60 mL, 1.20 mmol). After stirring for 72 h at 75° C., the reaction mixture is diluted with methanol and purified by preparative reversed-phase HPLC (XBridge, gradient of methanol in water, 0.1% NH4OH, 60° C.). Yield: 48 mg (17% of theory); ESI mass spectrum: [M+H]+=441; Retention time HPLC: 0.78 min (Z011_S03).

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