Polymer-Supported 1,5,7-Triazabicyclo[4.4.0]dec-5-ene as Polyvalent Ligands in the Copper-Catalyzed Huisgen 1,3-Dipolar Cycloaddition

New supported catalysts for the Huisgen's [3 + 2] azide-alkyne cycloaddition have been prepared by immobilization of copper species on commercially available polymeric matrixes incorporating the 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) template. The synergic exploitation of the exceptional copper chelating ability and basicity profile of the TBD framework, in addition to ensuring effective immobilization and stabilization of copper species, allows the implementation of three-component strategies. The new catalytic systems enabled the development of regioselective, efficient, modular, mild and eco-friendly multicomponent syntheses of diversely decorated 1,2,3-triazoles, contributing to expand the scope and versatility of the Cu-catalyzed Huisgen 1,3-dipolar cycloaddition.