Orbital - Vol. 11 No. 5 - July-September 2019
FULL PAPERS

A Simple and Green Protocol for the Synthesis of 3,4-dihydropyrimidin-2(1H)-ones Using 11-Molybdo-1-vanado phosphoric Acid as a Catalyst Under Ultrasound Irradiation

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  • Laxmikant D. Chavan,
  • Surekha N. Deshmukh,
  • Sunil G. Shankarwar
Laxmikant D. Chavan
Jawaharlal Nehru Engineering College, Aurangabad, Maharashtra
Surekha N. Deshmukh
Jawaharlal Nehru Engineering College, Aurangabad, Maharashtra
Sunil G. Shankarwar
Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, Maharashtra
Published October 4, 2019
Keywords
  • 3,4-dihydropyrimidin-2(1H)-ones,
  • heteropoly acids,
  • 11-molybdo-1-vanadophosphoric acid,
  • ultrasound irradiation
How to Cite
(1)
Chavan, L. D.; Deshmukh, S. N.; Shankarwar, S. G. A Simple and Green Protocol for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-Ones Using 11-Molybdo-1-Vanado Phosphoric Acid As a Catalyst Under Ultrasound Irradiation. Orbital: Electron. J. Chem. 2019, 11, 314-320.

Copyright (c) 2019 Orbital: The Electronic Journal of Chemistry

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Abstract

A one-pot three-component reaction of ethyl acetoacetate, aldehydes and urea has efficiently been carried out in the presence of 11-molybdo-1-vanadophosphoric acid in ethanol at room temperature under ultrasound irradiation to form the corresponding 3,4-dihydropyrimidin 2(1H)-ones in high yields. The 11-molybdo-1-vanadophosphoric acid (H4PMo11V1O40) was prepared and characterized by FT-IR spectroscopy, TG-DTA analysis and XRD analysis techniques. The presence of Keggin structure and incorporation of vanadium into the Keggin structure of synthesized H4PMo11V1O40 catalyst was confirmed by FT-IR and powder XRD analysis techniques. TG-DTA analysis results indicated that H4PMo11V1O40 catalyst was thermally stable up to the temperature 434 °C. The present catalytic system is recyclable and can be reused without greater loss of reactivity.

DOI: http://dx.doi.org/10.17807/orbital.v11i5.1423

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