DIOXETANO-CROWN ETHERS. STABILIZATION THROUGH COMPLEXATION WITH METAL IONS
The first members of dioxetanocrown ethers 3 and 4 were prepared in methylene blue-sensitized,photooxygenations of 9- and 18-membered stilbecrown ethers 1 and 2, and the activation paramethers 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.