Bromine → Methyl 4-(bromoacetyl)benzoate

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To a solution of 4-acetyl-benzoic acid methyl ester (8.4 mmol) in acetic acid (20 mL) was added bromine (8.4 mmol). The reaction was stirred at RT for 2 h over which time the red colour disappeared and an off white precipitate formed. The product was collected by filtration and washed with cold methanol/water (200 mL 1:1) to yield a white powder (55%). 1H NMR (400 MHz, CDCl3) 3.98 (3H, s), 4.20 (2H, s), 8.02 (2H, d, J=8 Hz), 8.18 (2H, d, J=8 Hz).

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