Sodium Carbonate → 2'-Methoxy-biphenyl-4-carboxylic acid ethyl ester

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-bromo benzoic acid ethyl ester (2.7 mL, 16.5 mmol), 2-methoxy boronic acid (2.5 g, 16.5 mmol) and sodium carbonate (7.7 g, 72.6 mmol) in toluene:ethanol:water (75 mL:37 mL:37 mL), was flushed with nitrogen for 1 hour. After addition of the tetrakis (triphenylphosphine)palladium (0) catalyst (0.96 g, 0.83 mmol), the reaction mixture was heated at 100° C. overnight. After cooling, the mixture was filtered through Celite which was then rinsed with ethyl acetate. The organic layer was washed with water, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo to give a brown oil. Purification of the residue by flash chromatography with a solvent gradient from 25% to 50% dichloromethane in hexane provided the title compound (3.8 g, 89.9%) as a pale yellow oil.

Provenance & Evidence