If the few potassium iodide was added to the O-alkylation of 2,5-dimethylphenol and 1,3-dibromopropane,the reactive time would decrease and the yields would reach to 67.8%.

• 在2；5-二甲基苯酚与1；3-二溴丙烷的O-烷基化反应中加入少量碘化钾；反应时间可大大缩短；且产率亦可达67.；8%25