Sodium Carbonate → 4-[4-Methoxy-3-(phenyl)phenyl]pyridine

Participants

Reaction Conditions

Reaction Steps

A stirred mixture of 4-(3-bromo-4-methoxyphenyl)pyridine (1.32 g, 5 mmol), phenylboronic acid (0.67 g, 5.5 mmol), tri-o-tolylphosphine (0.152 g, 0.50 mmol), palladium (11) acetate (0.056 g, 0.25 mmol), sodium carbonate (1.06 g, 10 mmol) and water (10 mL) in dimethylformamide (20 mL) is heated at 80° C. for 3 h. The mixture is then treated with water (100 mL) and extracted with ethyl acetate (3×80 mL). The combined extracts are washed (saturated NaCl), dried (Na2SO4), filtered and the solvent is evaporated off under reduced pressure to yield the crude product which is purified by chromatography (silica gel, 98% ethyl acetate/1.8% ethanol/0.2% aqueous NH3 (25%)) to give 4-[4-methoxy-3-(phenyl)phenyl]pyridine base. The base is dissolved in diethylether (5 mL), treated with methanolic HCl (excess), evaporated to dryness under reduced pressure and recrystallised from isopropanol-diethylether to give 4-[2-methoxy-(1,1-biphenyl)-5-yl]pyridine, hydrochloride as a pale-yellow crystalline solid, m.p. 180-200° C., and having the following physical characteristics:

Provenance & Evidence