Volume 33, Issue 9 e5058
FULL PAPER

Synthesis of Pyrazolo-[4́,3́:5,6]pyrido[2,3-d]pyrimidine-diones Catalyzed by a Nano-sized Surface-Grafted Neodymium Complex of the Tungstosilicate via Multicomponent Reaction

Mansoureh Daraie

Mansoureh Daraie

Department of Chemistry, School of Sciences, Alzahra University, Vanak, Tehran, Iran

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Majid M. Heravi

Corresponding Author

Majid M. Heravi

Department of Chemistry, School of Sciences, Alzahra University, Vanak, Tehran, Iran

Correspondence

Majid M. Heravi, Department of Chemistry, School of Sciences, Alzahra University, Vanak, Tehran, Iran. Email: [email protected]; [email protected]

Masoud Mirzaei, Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran. Email: [email protected]; [email protected]

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Masoud Mirzaei

Corresponding Author

Masoud Mirzaei

Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran

Correspondence

Majid M. Heravi, Department of Chemistry, School of Sciences, Alzahra University, Vanak, Tehran, Iran. Email: [email protected]; [email protected]

Masoud Mirzaei, Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran. Email: [email protected]; [email protected]

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Nahid Lotfian

Nahid Lotfian

Department of Chemistry, School of Sciences, Alzahra University, Vanak, Tehran, Iran

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First published: 01 July 2019
Citations: 22

Abstract

An inorganic–organic hybrid based on lanthanide clusters and Keggin type polyoxometalates (POMs) (Na[Nd (pydc-OH)(H2O)4]3}[SiW12O40]) was used the first time as trinuclear catalyst for one pot synthesis of pyrazolo[4́́,3́:5,6]pyrido[2,3-d]pyrimidine-diones, via two different four and five-component reactions involving hydrazine hydrate, ethyl acetoacetate, aryl aldehydes, and 6-amino-1,3-dimethyl uracil or barbituric acid with ammonium acetate as alternative materials in green condition. To evaluate potential application of the as-made hybrid in adsorption and separation processes, nitrogen adsorption was performed at 77 K through simulation study. The hybrid catalyst was further characterized via powder X-ray diffraction (PXRD) at room temperature which indicated the good phase purity of the catalyst. The results show that the catalytic activity of the hybrid catalyst has increased relative to each parent component due to the special interaction between Keggin anions and pydc-OH ligands.

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