Abstract Herein, a new application of an ionic liquid containing copper (I),([Cu (Im 12) 2] CuCl 2), is introduced. This ionic liquid was used as an efficient catalyst for the click cyclization between organic azides and terminal alkynes in various solvents. Then, the mixture of [bmim] BF 4/[Cu (Im 12) 2] CuCl 2 was used as a green catalytic medium for the multicomponent click synthesis of 1, 4-disubstituted-1H-1, 2, 3-triazoles from α-halo ...