Polymer-supported copper(I) catalysts for the experimentally simplified azide-alkyne cycloaddition

Tris-(benzyltriazolylmethyl)amine (TBTA), a widely used ligand for the copper-catalyzed azide-alkyne cycloaddition, has been immobilized on a TentaGel resin. Once loaded with copper(I), the resulting air-stable complex acts as an efficient catalyst for the azide-alkyne cycloaddition reaction and prevents contamination of products by copper salts. The immobilized TBTA ligand should find immediate use in the parallel synthesis of compounds for direct screening.