Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (6): 20220698.doi: 10.7503/cjcu20220698

• Polymer Chemistry • Previous Articles     Next Articles

Rapid Grafting of Phenylboronic Acid with Hydroxypropyl Chitosan Mediated by HATU

LI Aoqi1, HU Chuanzhi2, SHI Han1, DENG Mingyu2, XIAO Bo1(), JIANG Bo1   

  1. 1.School of Chemistry,Key Laboratory of Green Chemistry and Technology,Ministry of Education,Sichuan University,Chengdu 610064,China
    2.Kunshan Jingkun Oilfield Chemistry Company,Kunshan 215337,China
  • Received:2022-11-04 Online:2023-06-10 Published:2023-02-17
  • Contact: XIAO Bo E-mail:xiaobo_chem@scu.edu.cn

Abstract:

Phenylboronic acid(PBA) can form reversible covalent bonds with cis-1,2-diol or 1,3-diol in an aqueous solution, which makes it useful as the glucose-responsive units or dynamic cross-linking groups in nano/hydrogels. In this paper, PBA was efficiently grafted on hydroxypropyl chitosan(HPCS) by employing 2-(7-azabenzotriazol-1-yl)- NNN',N'-tetramethyluronium hexafluorophosphate(HATU) as a coupling reagent in dimethyl sulfoxide(DMSO). The resulting carboxyphenylboronic acid-grafted hydroxypropyl chitosan(CPBA-HPCS) was soluble when pH>8.5, and the structure was characterized and confirmed by Fourier-transform infrared spectroscopy(FTIR) and nuclear magnetic resonance(NMR). In addition, the kinetics of the reaction were studied and a series of CPBA-HPCS with different substitution degrees(up to 0.78) was prepared. This novel chitosan derivative has good application prospects in the preparation of smart hydrogels and drug carriers.

Key words: Chitosan, Hydroxypropyl chitosan, Phenylboronic acid, 2-(7-Azabenzotriazol-1-yl)-N, N, N', N'-tetramethyluronium hexafluorophosphate, Amidation

CLC Number: 

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