Volume 33, Issue 9 e5043
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Ag3[PMo12O40]: An efficient and green catalyst for the synthesis of highly functionalized pyran-annulated heterocycles via multicomponent reaction

Mehrnoush Tamimi

Mehrnoush Tamimi

Department of Chemistry, School of Science, Alzahra University, PO Box 1993891176, Vanak, Tehran, Iran

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Majid M. Heravi

Corresponding Author

Majid M. Heravi

Department of Chemistry, School of Science, Alzahra University, PO Box 1993891176, Vanak, Tehran, Iran

Correspondence

Majid M. Heravi, Department of Chemistry, School of Science, Alzahra University, PO Box 1993891176, Vanak, Tehran, Iran.

Email: [email protected]; [email protected]

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Masoud Mirzaei

Masoud Mirzaei

Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, 917751436 Mashhad, Iran

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Vahideh Zadsirjan

Vahideh Zadsirjan

Department of Chemistry, School of Science, Alzahra University, PO Box 1993891176, Vanak, Tehran, Iran

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Nahid Lotfian

Nahid Lotfian

Department of Chemistry, School of Science, Alzahra University, PO Box 1993891176, Vanak, Tehran, Iran

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Hossein Eshtiagh-Hosseini

Hossein Eshtiagh-Hosseini

Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, 917751436 Mashhad, Iran

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First published: 30 June 2019
Citations: 25

Abstract

A facile, efficient and eco-friendly catalytic protocol was developed for the synthesis of medicinally important pyran-annulated heterocycles via multicomponent reaction (MCR). Cyclocondensation of differently substituted aromatic aldehydes, malononitrile/ethyl cyanoacetate and various β-dicarbonyl compounds in the presence of Ag3[PMo12O40]⋅nH2O as heterogeneous catalyst, in EtOH–H2O, afforded diverse pyran-fused chromene analogues. The merits observed for this approach were it being conducted via MCR, using commercially available or easily accessible starting materials in the presence of a green and easily separable heterogeneous and reusable catalyst, and affording high yields of desired products in very short reaction times with high purity in one-pot fashion, thus providing a superior alternative approach for the synthesis of pyran-annulated heterocycles.

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