反应详情

6.0 g of potassium carbonate and 3-methoxy-1-bromopropane are added at room temperature to a solution of 64.6 g of 5-bromo-2-methoxyphenol in 350 ml of acetonitrile. The reaction mixture is stirred under reflux for 14 hours. After removal of the solvent by evaporation, 1200 ml of ice/water are added to the residue and extraction is carried out with ether. The organic extracts are washed with saturated sodium chloride solution, dried over magnesium sulfate and concentrated by evaporation. Distillation under a high vacuum yields the title compound: Rf (hexanedethyl acetate=4: 1)=0.33; b.p.=126°-129° C./1.4 mbar; HPLC Rt =16.38 minutes; MS (M+)=274, 276.

1. temperatureunder reflux for 14 hours
2. customAfter removal of the solvent
3. customby evaporation, 1200 ml of ice/water
4. additionare added to the residue and extraction
5. washThe organic extracts are washed with saturated sodium chloride solution
6. dry with materialdried over magnesium sulfate
7. concentrationconcentrated by evaporation
8. distillationDistillation under a high vacuum