The first members of dioxetanocrown ethers 3 and 4 were prepared in methylene blue-sensitized photooxygenations of 9- and 18-membered stilbenocrown ethers 1 and 2, and the activation parameters for the thermolyses of 3 and 4 were obtained. Thermal decomposition of the bis-dioxetano-18-crown-6 4 was decelerated or accelerated in the presence of alkali metal salts depending upon the nucleophilicity of the counter anion.
第一个双恶
氧环醚 3 和 4 的成员是在
亚甲基蓝敏化的光
氧化反应中制备的,这些反应涉及 9 和 18 成员的
苯乙烯环醚 1 和 2,并且获得了 3 和 4 的热解活化参数。双恶
氧-18-ה
冠-6 4 的热分解速率在存在碱
金属盐的情况下根据反离子的亲核性而减慢或加快。