期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 18, 页码 5399-5403出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201411969
关键词
carbon dioxide fixation; density functional calculations; heterocycles; ionic liquids; reaction mechanisms
资金
- National Natural Science Foundation of China [21303224, 21403253, 21173239, 21133009, U1232203, 21321063]
- Chinese Academy of Sciences [KJCX2.YW.H30]
Protic ionic liquids (PILs), such as 1,8-diazabicyclo[5.4.0]-7-undecenium 2-methylimidazolide [DBUH][MIm], can catalyze the reaction of atmospheric CO2 with a broad range of propargylic amines to form the corresponding 2-oxazolidinones. The products are formed in high yields under mild, metal-free conditions. The cheaper and greener PILs can be easily recycled and reused at least five times without a decrease in the catalytic activity and selectivity. A reaction mechanism was proposed on the basis of a detailed DFT study which indicates that both the cation and anion of the PIL play key synergistic roles in accelerating the reaction.
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