Anodic oxidation of p-Bu~t-calix[4]arene-(OH)_2-(OCH_2CONEt_2)_2. Electrogeneration of a calixdiquinone in dichloromethane

摘要

The electrochemical oxidation of p-Bu~t-calix[4]arene-(OH)_2-(OCH_2CONEt_2)_2 1 has been investigated for the first time and was shown to result in the formation of the corresponding diquinone 3. The reaction proceeds via two successive two-electron irreversible oxidation steps both governed by and ECE mechanism. Alkali cations recognition can be realized by exhaustive oxidation of 1 in the presence of alkali salts.