Functionalized Chitosan as a Green, Recyclable, Biopolymer‐Supported Catalyst for the [3+2] Huisgen Cycloaddition

Abstract

Clean and green: Copper(I) complexes of phenanthroline-based ligands anchored on the chitosan polymer are good catalysts for the “click” cycloaddition of azides with terminal alkynes (see scheme; the scanning electron microscopy image shows the porous structure of the catalyst). These heterogeneous catalytic systems do not require a base or reducing agent and operate in alcohol or water.