Terminal alkyne homocoupling reactions catalyzed by an efficient and recyclable polymer-supported copper catalyst at room temperature under solvent-free conditions

A highly efficient protocol for terminal alkyne homocoupling reaction to 1,4-disubstituted 1,3-diynes using a polymer-supported copper catalyst at room temperature under solvent conditions is presented. The reaction proceeds smoothly to provide the corresponding products in excellent to high yields within 10-20 min.