This thesis consists three main projects include the introduction and characterization of three catalysts and catalytic activities of any of them investigated separately in some reactions. In the first project, synthesis of asymmetric diaryl thioethers and aryl phenyl amines was investigated using nanoparticles of copper(II) supported on multi-walled carbon nanotubes. Asymmetric diaryl thioethers produced by KOH as a base, H 2 O as a solvent and temperature of 80 o C in aerobic conditions with yields of 68 to 98 percent. Then aryl phenyl amines produced in the presence of KOH and water with yields of 83 to 95 percent in aerobic conditions. In the second project, Sonogashira reaction was done by copper(I) supported on multi-walled carbon nanotubes in the presence of KOH and DMF as a solvent with yields of 71 to 98 percent in 135 o C. The results showed that the copper catalysts supported on MWCNT have high performances in mentioned reactions. In the third project, the use of particles of copper(II) supported on polystyrene was evaluated in production of symmetrical diaryl thioethers and aryl benzyl thioethers. The catalyst used in these reactions also showed good activity and corresponding products were produced with yields of 55 to 100 and 75 to 85 percent. Prepared catalysts were fully characterized using the techniques TEM, ICP, FE-SEM, EDX, FT-IR, XRD, CHN and TGA and the different techniques consist of 1 H-NMR, 13 C-NMR and FT-IR were used to identify structures of obtained products from reactions.