“…[11] Although this procedure was simple enough, but using homogenous Zn (II) salts brought its own problem in separating of heavy metal at the end of the reaction, especially in industrial scale. In recent years, many homo-and heterogeneous catalysts have been used for this purpose such as silica sulfuric acid, [12] Mw À Pd/Co@CNT NPs, [13] Fe 3 O 4 @SiO 2 -TCT-PVAÀ Cu(II), [14] Pt-NPs@VC, [15] Zn hydroxyapatite, [16] Zn/Al hydrotalcite, [17] Cu 2 O, [18] diisopropylethylammonium acetate, [19] Fe(OAc) 2 , [20] CdCl 2 , [21] SiO 2 -H 3 BO 3 , [22] Cu-MCM-41, [23] Pd-SBT@MCM-41, [24] CuO nanoparticles, [25] copper (I) chloride, [26] [Cu(phen)(PPh 3 ) 2 ]NO 3 [27] and so on. [28] Although in many of these reported catalysts, the desired products were formed, but a number of them have some drawbacks such as prolonged reaction time, moderate yield, homogeneous or non-scalable catalyst and problem in their reusability.…”