Method for preparing 1, 2, 3-triazole type compounds in ion liquid

The invention discloses a method for preparing 1, 2, 3-triazole type compounds in ion liquid. The method includes steps of firstly, dissolving CuSO4.5H2O in water under room temperature, adding Zn granules, dripping hydrochloric acid solution to dissolve excessive Zn, allowing for reaction until no bubbles are generated, filtering, and washing filter cake with hydrochloric acid to obtain nano-copper catalysts; secondly, adding the nano-copper catalysts into the ion liquid, adding end group alkyne compounds and trinitride, stirring under room temperature for reaction to separate out solids, adding appropriate amount of diethyl ether, filtering, washing filter cake to obtain nano-copper catalysts for recycling, and purifying filtrate to obtain the 1, 2, 3-triazole type compounds. The method has the advantages that the nano-copper catalysts are simple to prepare, low in use amount, efficient and recyclable, traditional organic solvents are replaced by the ion liquid, and the method is environmental friendly.