Sodium Carbonate → ethyl (3-{3-[5-(2'-methoxybiphenyl-2-yl)-2-oxopyridin-1(2H)-yl]propyl}phenoxy)acetate

Participants

Reaction Conditions

Reaction Steps

A mixture of ethyl (3-{3-[5-(2-bromophenyl)-2-oxopyridin-1(2H)-yl]propyl}phenoxy)acetate (235 mg), (2-methoxyphenyl)boronic acid (114 mg), Na2CO3(159 mg), Pd(PPh3)4 (29 mg) in toluene (8 mL) and water (4 mL) was stirred under N2 gas atmosphere at 98° C. for 30 hours and cooled to ambient temperature. The reaction mixture was extracted with EtOAc. The organic layer was washed with brine, dried over anhydrous MgSO4, filtered and evaporated in vacuo. The aqueous layer of the reaction mixture was acidified with 1M HCl aqueous solution and extracted with EtOAc and the organic layer was washed with brine, dried over anhydrous MgSO4, filtered and evaporated in vacuo. The filtrate and the residue of the first extract was combined and evaporated in vacuo. The residue was dissolved in EtOH (20 mL). To the solution was added concentrated H2SO4 (1.5 mL) at ambient temperature and refluxed for 1 hour. The reaction mixture was cooled to ambient temperature, neutralized with saturated NaHCO3 aqueous solution and extracted with EtOAc. The organic layer was washed with brine, dried over anhydrous MgSO4, filtered and evaporated in vacuo. The residue was purified by silica gel column chromatography (n-hexane:EtOAc=60:40) to afford ethyl (3-{3-[5-(2′-methoxybiphenyl-2-yl)-2-oxopyridin-1(2H)-yl]propyl}phenoxy)acetate (75 mg) as a colorless oil.

Provenance & Evidence