Ultrasound Assisted Convenient and Efficient Protocol for Synthesis of Dihydropyrimidine-2-thiones
Keywords:
Chalcones, Dihydropyrimidine-2-thione, Cu(I) catalyst, Sodamide, Ultrasound irradiation.Abstract
Chalones were prepared by condensation of various substituted aromatic aldehydes or heterocyclic aldehydes and acetophenone in alkaline ethanol, while pyrimidine-2-thione derivatives were prepared by condensation of chalcones and thiourea under ultrasonic irradiation at room temperature. The most important advantage of ultrasound irradiation was observed and high yields of products were obtained after 10-15 min. sonication.
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