Journal
ULTRASONICS SONOCHEMISTRY
Volume 21, Issue 1, Pages 29-34Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2013.05.009
Keywords
Ultrasonic irradiation; Poly(4-vinylpyridine); 2,3-Dihydroquinazolin-4(1H)-ones; Ionic liquid
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Funding
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities [XZ1011]
- Hexi University [XZ-2009-9]
- National Natural Science Foundation of China [21262010]
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A novel poly(4-vinylpyridine) supported acidic ionic liquid catalyst was synthesized by the reaction of 4-vinylpyridine with 1,3-propanesultone, followed by the polymerization and the addition of the heteropolyacid. Due to the combination of polymer features and ionic liquid, it acted as a heterogeneous catalyst to effectively catalyze the cyclocondensation reaction of anthranilamide with aldehydes under ultrasonic irradiation and afforded the corresponding 2,3-dihydro-4(1H)-quinazolinones compounds in good to excellent yields. In addition, the catalyst could be easily recovered by the filtration and reused six times without significant loss of catalytic activity. More importantly, the use of ultrasonic irradiation can obviously accelerate the reaction. (C) 2013 Published by Elsevier B.V.
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