Ethyl Acetate → 1,3-Benzenediol, 4-methyl-

関与物質

反応手順

Boron tribromide (3.1 ml, 3.2 mmol) was added to a solution of 2,4-dimethoxytoluene (1 g, 6.5 mmol) in pentane (10 ml) at −70° C. The reaction mixture was allowed to warm to ambient temperature and the mixture stirred for a further 2 hours. Ice water and ethyl acetate were then added and the aqueous layer basified to pH9.5 with 2M aqueous sodium hydroxide. After stirring for 10 minutes, the organic layer was separated and the aqueous layer extracted with ethyl acetate. The combined organic extract was washed with brine, dried (MgSO4) and the solvent removed by evaporation. The residue was purified by flash chromatography eluting with methylene chloride/ethyl acetate (9/1) to give 2,4-dihydroxytoluene (759 mg, 94%) as a white solid.

情報源と証拠