Acetic Acid → 1-[1-(4-Cyano-phenyl)-ethyl]-5-(3-difluoromethyl-phenyl)-6-methyl-4-oxo-1,4-dihydro-pyridine-3-carboxylic acid 4-methanesulfonyl-benzylamide

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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 4-methanesulfonyl-benzylamide (preparation 11, 110 mg, 0.208 mmol), 3-difluoromethyl-phenylboronic acid (48 mg, 0.28 mmol), palladium (0) tetrakis(triphenylphosphine) (32 mg, 0.028 mmol) in acetonitrile (2 mL) is added 2 M aqueous K2CO3 solution (0.21 mL, 0.42 mmol). After stirring for 18 h at 75° C., the reaction mixture is diluted with methanol, acidified with acetic acid and purified by preparative reversed-phase HPLC (XBridge, gradient of methanol in water, 0.1% TFA, 60° C.). Yield: 90 mg (75% of theory); ESI mass spectrum: [M+H]+=576; Retention time HPLC: 1.03 min (Z018_S04).

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