Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 15, Issue 1, Pages 1284-1299Publisher
MDPI
DOI: 10.3390/ijms15011284
Keywords
aldol reaction; microwave; green chemistry; ionic liquid
Funding
- National Natural Science Foundation of China [21273235, 20173189]
- Liaoning Provincial Natural Science Foundation of China [201204484]
- Knowledge Innovation Program of the Chinese Academy of Sciences
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Five quaternary ammonium ionic liquid (IL) and two tetrabutylphosphonium ILs were prepared and characterized. An environmentally benign and convenient functionalized ionic liquid catalytic system was thus explored in the aldol condensation reactions of aromatic aldehydes with acetone. The aldol reactions proceeded more efficiently through microwave-assisted heating than through conventional thermal heating. The yield of products obtained under microwave heating for 30 min was approximately 90%, and the ILs can be recovered and reused at least five times without apparent loss of activity. In addition, this catalytic system can be successfully extended to the Henry reactions.
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