Potassium Carbonate → 4-Chloro-3-(4-methoxyphenyl)benzenecarboxaldehyde

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To a degassed solution of 4-methoxybenzeneboronic acid (1.51 g, 10 mmol), 3-bromo-4-chlorobenzaldehyde (2 g, 9.13 mmol), and potassium carbonate (3.13 g, 22.8 mmol) in toluene/ethanol 2/1, (60 mL), Pd(PPh3)4 (130 mg, 1 mol %) is added and the mixture is degassed for further 5 minutes. The mixture is then refluxed for 2 days. The mixture was partitioned between ethyl acetate and water and extracted. The organic solvent was dried over sodium sulphate, removed under reduced pressure, and the residue purified by column chromatography (heptane/ethyl acetate 19/1 to afford 1.41 g of product.

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