Nano CaCO3: playing a special role in the monofunctionalization of calixarenes by epoxides
作者:Shuling Gong、Wei Wang、Yuanyin Chen、Lingzhi Meng、Tao Wan
DOI:10.1039/b206630k
日期:2002.11.20
It was found that nano CaCO3 played an interesting role in the reaction of p-tert-butylcalixarene with epoxides. In the presence of nano CaCO3, a monosubstituted calixarene, a β ring-opening product of epoxide, was obtained regioselectively in good yield. When normal CaCO3 was used under the same conditions, the yield was less than 2%. The β ring-opening product of epichlorohydrin could convert to monoglycidyl calixarene by reacting with C2H5ONa in tetrahydrofuran at room temperature in moderate yield.