期刊
RSC ADVANCES
卷 3, 期 29, 页码 11691-11696出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra40809d
关键词
-
资金
- Ministry of Science and Technology [2011ZX09201-201-06]
- Research Foundation for the Returned Overseas Chinese Scholars, Shanxi Province [2009003]
An efficient and reusable protic-ionic-liquid solvent-catalyst system, HMTA-AcOH-H2O, has been developed and used in the Knoevenagel condensation reaction of aromatic aldehydes with ethyl 2-cyanoacetate. Under ultrasonic irradiation, the Knoevenagel condensation promoted by the protic-ionic-liquid solvent-catalyst system proceeds smoothly and cleanly. Moreover, the HMTA-AcOH-H2O solvent-catalyst system could be recycled for at least 6 times and no significant loss of activity was observed. This protocol has notable advantages, such as being eco-friendly, the ease of the work-up and reuse of the ionic liquid conveniently, which could help reduce disposal costs and contribute to the development of new catalysts for use in green and continuous chemical processes.
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