In the present paper, we developed a straightforward and efficient approach to synthesis of 4,4′-(arylmethylene)bis(3-methyl-1H-pyrazol-5-ol) derivatives by a simple one pot pseudo five component reactions using ZnAl2O4 nanoparticles as catalyst under benign reaction conditions.
A convenient, efficient and ligand-free method for the C-N coupling reaction of anilines and aryl iodides was performed using CuCr 2 O 4 nanoparticles. Copper chromite nanocatalyst improved rate and facility of the synthesis of triarylamines. The heterogeneous catalyst was fully characterized by scanning electron microscopy, IR and X-ray diffraction techniques. Recyclability, excellent yields of products and short reaction times are the important advantages of this ligand-free procedure by using the CuCr 2 O 4 nanoparticles.
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