Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 262, Issue -, Pages 328-335Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2018.04.121
Keywords
Ionic liquid; Mesoporous silica; Biginelli reaction; Heterogeneous catalysis; Cooperative catalysis
Funding
- National Natural Science Foundation of China [21506115]
- Research Fund for Excellent Dissertation of China Three Gorges University [2018SSPY055]
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A series of MCM-41 supported functionalized ionic liquids doped with copper species were prepared, characterized and evaluated as catalysts in the Biginelli reaction. Most of these supported ionic liquids perform well in the reaction, especially the multifunctional copper coordinated MCM-41 supported heterogeneous catalysts (0.5)IL-TiCl5@MCM-41@Cu(15) and (0.5)IL-HSO4@MCM-41@Cu( 15). The catalytic tests revealed that (0.5)IL-HSO4@MCM-41@Cu( 15) was the best and powerful catalyst in the Biginelli reaction for the preparation of 3,4-dihydropyrimidinones with high to excellent yields. The catalyst can be easily separated from the reaction mixture by filtration and reused in six consecutive cycles without significant loss in catalytic activity. (C) 2018 Elsevier B.V. All rights reserved.
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