A High-Efficiency Strategy for Synthesizing Cyclic Polymers of Methacryates in One Pot
Xing Zhu, Nianchen Zhou*（周年琛）, Jian Zhu, Zhengbiao Zhang*（张正彪）, Wei Zhang, Zhenping Cheng, Yingfeng Tu, Xiulin Zhu*（朱秀林）
Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou Industrial Park, Suzhou 215123, China.
Macromol. Rapid Commun. 2013, 34, 1014–1019.
An unprecedented strategy for the high-efficiency preparation of the cyclic polymers is developed. In this strategy, the atom transfer radical polymerization, the substitution of chain-end halide by azide group and Cu-catalyzed alkyne–azide cyclization, i.e., the frequently used three separated steps for the preparation of cyclic polymers, are integrated into a one-pot reaction by the introduction of a “regulator”. The kernel of this novel strategy is the utilization of the different rates between the competitive ATRP propagation and SN2 substitution of a tertiary-carbon halogen and secondary-carbon halogen. 0.55 g (yield = 59%) cyclic poly(methyl methacrylate) is obtained from 3.0 mL reaction solution. This work proposed a high-efficiency and bright promising strategy for the preparation of cyclic polymer, which would evoke more research interests on cyclic polymer.
链接： //onlinelibrary.wiley.com/doi/10.1002/marc.201300220/abstract
