Transformation of Atmospheric CO2 Catalyzed by Protic Ionic Liquids: Efficient Synthesis of 2‐Oxazolidinones |
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| Authors: | Jiayin Hu Jun Ma Qinggong Zhu Zhaofu Zhang Congyi Wu Prof Buxing Han |
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| Institution: | Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Colloid and Interface and Thermodynamics Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China) |
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| Abstract: | Protic ionic liquids (PILs), such as 1,8‐diazabicyclo5.4.0]‐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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| Keywords: | carbon dioxide fixation density functional calculations heterocycles ionic liquids reaction mechanisms |
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