Synthesis of well-defined cyclic polyesters via self-accelerating click reaction

POLYMER

卷:121

Article

Sun, Peng^1,3  Zhu, Wen¹  Chen, Jiqiang¹  Liu, Jian'an¹  Wu, Ying²  Zhang, Ke^1,3 

[1] Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China

[2] Beijing Normal Univ, Inst Polymer Chem & Phys, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China

[3] Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China

关键词: Bimolecular ring-closure;    Cyclic polyesters;    Double strain-promoted azide-alkyne cycloaddition;    Ring opening polymerization;    Self-accelerating click reaction;   

DOI  :  10.1016/j.polymer.2017.06.028

来源: Elsevier

【 摘 要 】

A metal-free and efficient homodifunctional bimolecular ring-closure method was developed specifically for the formation of well-defined cyclic polyesters based on the combination of ring opening polymerization (ROP) and self-accelerating double strain-promoted azide-alkyne cycloaddition (DSPAAC) reaction. In this method, ROP and the following end group modification were used to prepare the azideterminated liner polyester precursors. The self-accelerating DSPAAC click reaction was then used to prepare the corresponding cyclic polyesters by ring-closing the linear polyester precursors with the small linkers of sym-dibenzo-1,5-cyclooctadiene-3,7-diyne (DBA). The distinct advantage of this novel homodifunctional bimolecular ring-closure method lied in the fact that the pure cyclic polyesters could be efficiently prepared by using excess molar amounts of DBA small linkers to ring-close the linear polyester precursors. This was resulted from the self-accelerating property of the DSPAAC ring-closing reaction. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

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