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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 37, 2007 - Issue 5
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Original Articles

Synthesis and Characterization of Task‐Specific Ionic Liquids Possessing Two Brönsted Acid Sites

Dan Liu College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Shangdong, China; College of Petrochemical Engineering, Liaoning University of Petroleum and Chemical Technology, Liaoning, China
,
Jianzhou Gui College of Petrochemical Engineering, Liaoning University of Petroleum and Chemical Technology, Liaoning, China
,
Xiangqin Zhu College of Petrochemical Engineering, Liaoning University of Petroleum and Chemical Technology, Liaoning, China
,
Lijuan Song College of Petrochemical Engineering, Liaoning University of Petroleum and Chemical Technology, Liaoning, China
&
Zhaolin Sun College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Shangdong, China; College of Petrochemical Engineering, Liaoning University of Petroleum and Chemical Technology, Liaoning, ChinaCorrespondence[email protected]; [email protected]
Pages 759-765 | Received 15 May 2006, Published online: 10 Mar 2007
 
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Abstract

Task‐specific ionic liquids possessing two Brönsted acid sites with –COOH, HSO− 4, or H2PO− 4 groups have been designed, synthesized, and characterized. Under mild conditions and without any additional organic solvent, the esterification of isopropanol by chloroacetic acid could be carried out in these new task‐specific ionic liquids. In comparison with most of acidic ionic liquids in current use, these ionic liquids are halogen free and more environmentally benign as media and catalysts.

Acknowledgment

We are grateful for the financial support from the National Natural Science Foundation of China (No. 20476042) and the Educational Department of Liaoning Province (No. 05L234).

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