Also, in dioxane solution, 18Crown6 was prepared in 64.4% yields by reaction of polyethylene glycol 270 and ptoluenesulfonyl chloride.

• 以二氧杂环己烷为溶剂；通过聚乙二醇270与对甲基苯磺酰氯反应合成了18冠6；产率64.；4%25。