Efficient synthesis of 2,3-dihydroquinazolin-4(1H)-ones using nano-sized protonated ZSM–5 as a biodegradable and reusable solid acid catalyst

Authors

  • Fatemeh Rigi Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan. Iran.
  • Sedigheh Rostami Analytical division, Faculty of Chemistry, University of Mazandaran, Postal code 47416-95447, Babolsar, Iran.|Nano and Biotechnology Research Group. University of Mazandaran, Babolsar, Iran.
  • Seyed Naser Azizi Analytical division, Faculty of Chemistry, University of Mazandaran, Postal code 47416-95447, Babolsar, Iran.|Nano and Biotechnology Research Group. University of Mazandaran, Babolsar, Iran.
Abstract:

Nano-sized protonated ZSM–5 ( H-ZSM-5nanozeolite) was successfully synthesized by the hydrothermal method using the bagasse ash (BGA) as a new silica source. Cultivated BGA in the south of the Caspian Sea (Mazandaran province, Iran) was used for extracting silica powder. H-ZSM-5 was characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electronic microscopy (SEM) and Brunauer–Emmett–Teller (BET), Barrett-Joyner-Halenda (BJH) techniques. The catalytic activity of H-ZSM-5 nanozeolite was evaluated for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones via one-pot three-component reaction of aromatic aldehydes, 2-aminobenzothiazole or 2-aminobenzimidazole and isatoic anhydride under solvent-free conditions. Short reaction time, high yields, a simple experimental procedure in the absence of any toxic solvents and recovery of catalyst are the advantages of this protocol.

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Journal title

volume 7  issue 4

pages  267- 276

publication date 2017-12-01

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