A fast, simple and convenient procedure for the synthesis of fused pyrimidinone derivatives by using [Hmim][HSO4] as a green, efficient and reusable catalyst under solvent-free conditions

Authors

• Leila Khazdooz ^{1, 2}
• Amin Zarei ³
• Abdol R. Hajipour ^{4, 5}
• Nafisehsadat Sheikhan ⁶

1. Department of Science, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan 81595-158, Iran
2. Laser and Biophotonics in Biotechnologies Research Center, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan 81595-158, Iran
3. Department of Science, Fasa Branch, Islamic Azad University, PO Box No. 364, Fasa 7461713591, Fars, Iran.
4. Pharmaceutical Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156, Iran.
5. Department of Pharmacology, University of Wisconsin, Medical School, 1300 University Avenue, Madison, 53706-1532, WI, USA.
6. Department of Chemistry, Faculty of Sciences, Najafabad Branch, Islamic Azad University, Najafabad, Esfahan, P.O. Box 517, Iran.

Abstract

In the present of methylimidazolium hydrogen sulfate, the synthesis of arylidene heterobicyclic pyrimidinones is studied by condensation of aromatic aldehyde, cyclopentanone, and urea or thiourea. Using solvent-free conditions, non-toxic and inexpensive materials, simple and clean work-up, short reaction times and good yields of the products are the advantages of this method.

Keywords

• Methylimidazolium hydrogen sulfate
• Pyrimidinone
• Bronsted acidic ionic liquid
• Biginelli-type reaction