Synthesis and Application of pH-Sensitive Linkers in Amphiphilic Block Copolymer

  • Zhu Fangxia ,
  • Zhuang Yuan ,
  • Li Qing ,
  • Yang Qinglai ,
  • Wu Xinyan ,
  • Shao Zhifen ,
  • Gong Bin ,
  • Shen Yumei
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  • a Shanghai Center for Systems Biomedicine, Key Laboratory of Systems Biomedicine and Bio-ID Center, Shanghai Jiao Tong University, Shanghai 200240;
    b Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237;
    c School of Biomedical Engineering, Bio-ID Center, Shanghai Jiao Tong University, Shanghai 200240;
    d College of Chemistry, Beijing Normal University, Beijing 100875;
    e Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260, USA

Received date: 2014-03-12

  Revised date: 2014-04-28

  Online published: 2014-05-07

Supported by

Project supported by the National Natural Science Foundation of China (Nos. 81071250, 91227109), ant the Major Projects in National Science and Technology, “Creation of Major New Drugs” (No. 2011ZX09501-001-05).

Abstract

A series of acid cleavable linkers based on tetrahydropyran/tetrahydrofuran (THP/THF) ether were synthesized, in which both of the two terminals are active group which is easy to react with other compounds. The structures for these linkers 1a and 1b were confirmed by 1H NMR, 13C NMR, HRMS, and IR. Diblock cooligomerModel compound containing THP linkage was synthesized. Furthermore a pH-responsive amphiphilic diblock copolymer containing tetrahydrofuran (THF) linkage in which hydrophilic segment was poly(ethylene glycol) (PEG) and hydrophobic segment was hydrophobic polylactic acid (PLA) was synthesized and characterized by 1H NMR, IR and gel permeation chromatography (GPC). The size, stability and critical micelle concentration (CMC) of diblock copolymer micelle were also evaluated. The preliminary experimental results show that the acid sensitive amphiphilic diblock copolymer micelle is a potential alternative for future drug delivery.

Cite this article

Zhu Fangxia , Zhuang Yuan , Li Qing , Yang Qinglai , Wu Xinyan , Shao Zhifen , Gong Bin , Shen Yumei . Synthesis and Application of pH-Sensitive Linkers in Amphiphilic Block Copolymer[J]. Chinese Journal of Organic Chemistry, 2014 , 34(9) : 1806 -1815 . DOI: 10.6023/cjoc201403029

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