Sodium Carbonate → ((S)-1-{1-[5-(4-Fluoro-benzoyl)-pyridin-3-ylmethyl]-2-oxo-6-phenyl-1,2-dihydro-pyridin-3-ylcarbamoyl}-ethyl)-methyl-carbamic acid benzyl ester

Participants

Reaction Conditions

Reaction Steps

A mixture of ((S)-1-{6-bromo-1-[5-(4-fluoro-benzoyl)-pyridin-3-ylmethyl]-2-oxo-1,2-dihydro-pyridin-3-ylcarbamoyl}-ethyl)-methyl-carbamic acid benzyl ester (1D) (79 mg, 0.13 mmol) and phenyl boronic acid (19 mg, 0.15 mmol) in 8 mL of toluene, 3 mL of ethanol and Na2CO3 (0.5 mL, 0.5 mmol, 1 M aqueous solution) is degassed under vacuum. PdCl2(PPh3)2 (5 mg, 0.006 mmol) is added to the mixture. The reaction mixture is stirred at 80° C. for 1 hour, cooled to room temperature and diluted with 20 mL of EtOAc. The organic phase is washed with 2×5 mL of water and concentrated. The crude product is purified by chromatography (heptane 60%, EtOAc 40%) to give ((S)-1-{1-[5-(4-fluoro-benzoyl)-pyridin-3-ylmethyl]-2-oxo-6-phenyl-1,2-dihydro-pyridin-3-ylcarbamoyl}-ethyl)-methyl-carbamic acid benzyl ester (1E) (72 mg, yield 91%) as a light yellow solid. MS (ESI) m/e 619 (M+H+).

Provenance & Evidence