Water → 4'-Methoxy-3-methyl[1,1'-biphenyl]-4-carboxylic acid

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Reaction Steps

4-Bromo-2-methyl-benzoic acid (2.15 g, 10 mmol), 4-methoxy-phenylboronic acid (1.52 g, 10 mmol) and sodium carbonate (3.24 g, 30 mmol) in a mixture of toluene, water and ethanol (15 mL:6 mL:3 mL) was sparged with nitrogen for 5 minutes. To this was added palladium acetate (0.014 g). The mixture was heated at reflux, under a static pressure of nitrogen, for 24 hours. The sample was diluted with water and ethyl acetate (50 mL each) and the pH was adjusted to 1. The layers were separated and the aqueous phase was extracted with ethyl acetate. The organic extracts were combined and washed with water and brine. The sample was dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The resulting solid was recrystallized from ethyl acetate/hexanes to yield the title compound (2.16 g ) as a white solid, m.p 199–201° C.

Provenance & Evidence