Dimethyl Sulfate → 2-Bromo-5-fluoroanisole

Participants

Reaction Conditions

Reaction Steps

To a suspension of 2-bromo-5-fluorophenol (20.0 g, 104.7 mmol) and potassium carbonate (21.71 g, 157.1 mmol) in acetone (200 mL) was added dimethyl sulphate (10.90 mL, 115.2 mmol). The resulting suspension was allowed to stir at 60° C. for 2 h before being allowed to cool and then concentrated in vacuo. The residue was dissolved in ether (200 mL) and water (100 mL). The organic phase was washed with aqueous hydrochloric acid (2 N, 50 mL), saturated sodium bicarbonate solution (50 mL) with the resulting organic phase being dried (MgSO4) and the solvent evaporated in vacuo to give a pale yellow oil (21.46 g, 100%). δH (300 MHz, CDCl3) 7.45 (1H, dd, Ar), 6.70–6.55 (2H, m, Ar), 3.90 (3H, s, OCH3).

Provenance & Evidence