反应详情

4,4′-dimethoxybenzil (2.0 g, 7.41 mmol) was dissolved in 30 mL of hydrogen bromide and 10 mL of acetic acid glacial. The reaction was stirred at reflux temperature overnight. The mixture was extracted with ethyl acetate and the organic phase was washed with water, dried over sodium sulphate. Concentration under vaccum gave the title compound as a yellow solid (1.9 g, quantitative).

1. temperatureat reflux temperature overnight
2. extractionThe mixture was extracted with ethyl acetate
3. washthe organic phase was washed with water
4. dry with materialdried over sodium sulphate
5. concentrationConcentration under vaccum