Abstract
For the first time, 3,4-dihydropyrimidin-2(1H)-one and 3,4-dihydropyrimidin-2(1H)-thione derivatives have been synthesized in good yields by a modified Biginelli-type reaction with dicationic acidic ionic liquids as catalysts. The products could be separated simply from the catalyst–water system, and the catalysts could be reused at least six times without noticeably reducing catalytic activity.
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Acknowledgments
We are grateful to the Education Commission of Jiangsu Province (07KJD530238), Jiangsu Provincial Key Laboratory of Coast Wetland Bioresource and Environment Protection (JLCBE09023), and Professional Elite Foundation of Yancheng Normal University for financial support.
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Fang, D., Zhang, Dz. & Liu, Zl. One-pot three-component Biginelli-type reaction catalyzed by ionic liquids in aqueous media. Monatsh Chem 141, 419–423 (2010). https://doi.org/10.1007/s00706-010-0271-y
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DOI: https://doi.org/10.1007/s00706-010-0271-y