Clinochlore‐Supported Copper Nanoparticles as Green and Efficient Catalyst for Room‐Temperature Synthesis of 1,2,3‐Triazoles in Water

Abstract Acid activated clinochlore supported copper nanoparticles was prepared for the first time by immobilization of copper sulfate on clinochlore followed by in situ chemical reduction. This new material (AA‐Clin@Cu) was characterized using SEM, TEM, TGA, FTIR, XRD, XPS, and EDX and it was applied as an efficient and inexpensive catalyst for the synthesis of 1,2,3‐triazoles in water at room temperature. Using this catalyst, benzylic and aliphatic halides, as well as arylboronic acids were reacted successfully with sodium azide and alkynes. The easy synthesis and air‐stable catalyst was recycled for four runs with small drops in catalytic activity. Characterization of the reused catalyst showed similar pattern to the fresh catalyst.