dioxo crown ether with a point symmetry were synthesized by the cyclization of the corresponding substituted oligoethylene glycol monocarboxymethyl ethers using benzenesulfonyl chloride in the presence of alkali metal carbonates. The reaction mechanism was discussed. Their stability constants toward sodium and potassium cations were determined and the relation between their structures and complexing
在碱
金属
碳酸盐的存在下,通过使用
苯磺酰氯环化相应的取代低聚
乙二醇单羧甲基醚,合成了 3-取代的 2-氧代
冠醚和具有点对称性的新型二氧代
冠醚。讨论了反应机理。确定了它们对
钠和
钾阳离子的稳定性常数,并讨论了它们的结构和络合性质之间的关系。