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Transformation of Atmospheric CO 2 Catalyzed by Protic Ionic Liquids: Efficient Synthesis of 2‐Oxazolidinones
Author(s) -
Hu Jiayin,
Ma Jun,
Zhu Qinggong,
Zhang Zhaofu,
Wu Congyi,
Han Buxing
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201411969
Subject(s) - ionic liquid , catalysis , chemistry , selectivity , reaction mechanism , metal , ionic bonding , combinatorial chemistry , reaction conditions , transformation (genetics) , green chemistry , ion , inorganic chemistry , organic chemistry , biochemistry , gene
Protic ionic liquids (PILs), such as 1,8‐diazabicyclo[5.4.0]‐7‐undecenium 2‐methylimidazolide [DBUH][MIm], can catalyze the reaction of atmospheric CO 2 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.