期刊
CHINESE JOURNAL OF CATALYSIS
卷 33, 期 4, 页码 706-710出版社
SCIENCE PRESS
DOI: 10.1016/S1872-2067(11)60377-X
关键词
sulfonated carbon; solid acid; Biginelli reaction; heterogeneous catalysis; solvent-free condition
资金
- Islamic Azad University, Mashhad Branch
A sulfonated carbon material was shown to be a highly efficient, eco-friendly, and recyclable solid acid catalyst for the Biginelli reaction of beta-ketoester, aldehyde, and urea or thiourea under solvent-free conditions. It gave 3,4-dihydropyrimidin-2(1H)-ones and -thiones in good to excellent yields. This method has the advantages of a simple procedure with easy work-up, short reaction time, and high yields. The catalyst can be recycled after a simple work-up and was reused four times without substantial reduction in activity.
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