Calix[4]quinones. Part 4: The ClO2 oxidation of calix[4]arene dialkyl ethers
作者:Yu-Lung Lin、Tzer-Shun Yu、Wen-You Wang、Lee-Gin Lin
DOI:10.1016/j.tet.2006.03.110
日期:2006.6
Except for the special case of calix[4]arene diethyl ether 1, the chlorine dioxide oxidation of dialkyl ethers 2–5 yielded only the corresponding calix[4]diquinone dialkyl ethers 8–11. Chlorine dioxide oxidation of calix[4]arene diethyl ether 1 produced two isomeric products 6 and 7, which were stable enough to be isolated by column chromatography. However, a slow conformational interconversion between