Responsive glyco-poly(2-oxazoline)s: synthesis, cloud point tuning, and lectin binding

Biomacromolecules. 2011 Jul 11;12(7):2591-600. doi: 10.1021/bm2003847. Epub 2011 Jun 8.

Abstract

A new sugar-substituted 2-oxazoline monomer was prepared using the copper-catalyzed alkyne-azide cycloaddition (CuAAC) reaction. Its copolymerization with 2-ethyl-2-oxazoline as well as 2-(dec-9-enyl)-2-oxazoline, yielding well-defined copolymers with the possibility to tune the properties by thiol-ene "click" reactions, is described. Extensive solubility studies on the corresponding glycocopolymers demonstrated that the lower critical solution temperature behavior and pH-responsiveness of these copolymers can be adjusted in water and phosphate-buffered saline (PBS) depending on the choice of the thiol. By conjugation of 2,3,4,6-tetra-O-acetyl-1-thio-β-d-glucopyranose and subsequent deprotection of the sugar moieties, the hydrophilicity of the copolymer could be increased significantly, allowing a cloud-point tuning in the physiological range. Furthermore, the binding capability of the glycosylated copoly(2-oxazoline) to concanavalin A was investigated.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Binding Sites
  • Carbohydrates / chemistry*
  • Click Chemistry
  • Concanavalin A / chemistry*
  • Hydrogen-Ion Concentration
  • Molecular Structure
  • Oxazoles / chemical synthesis*
  • Oxazoles / chemistry*
  • Polymers / chemical synthesis*
  • Polymers / chemistry*
  • Stereoisomerism

Substances

  • Carbohydrates
  • Oxazoles
  • Polymers
  • Concanavalin A