Document Type: Article
Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, P.O. Box 87317-51167, I. R. Iran
School of Chemistry, College of Science, University of Tehran, Tehran 14155-6455, Iran
An efficient synthesis of 4,4'-(phenylmethylene)bis(1H-pyrazol-5-ol)-3-carboxylates is achieved by one pot pseudo five-component reaction of phenylhydrazine, acetylenedicarboxylates and aromatic aldehydes in the presence of nano-NiZr4(PO4)6 at 60°C in water. Nano-NiZr4(PO4)6 has been characterized by powder X-ray diffraction (XRD) and scanning electronic microscopy (SEM). Use of simple and readily available starting materials, excellent yields in short times, reusability of the catalyst, little catalyst loading and simple operational procedures are some of the important features of this protocol.