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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 35, 2005 - Issue 14
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Original Articles

Friedel–Crafts Acylation of Ferrocene Catalyzed by Immobilized Ytterbium(III) Triflate in Ionic Liquid

Jianjun Li College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
,
Weike Su College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, ChinaCorrespondence[email protected]
,
Jingdu Lin College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
,
Mei Chen College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
&
Jia Li College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
Pages 1929-1937 | Received 22 Jan 2005, Published online: 16 Aug 2006
 
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Abstract

Ytterbium triflate [Yb(OTf)3]–catalyzed Friedel–Crafts acylation of ferrocene with anhydrides or acyl chlorides in n‐butylpyridinium tetrafluoroborate (BPyBF4) ionic liquid proceeded smoothly under mild conditions. The immobilized catalytic system (solvent/catalyst) was easily recovered and reused without any loss of activity. Chemoselective monoacylferrocenes were obtained in high yields by this catalytic system.

Acknowledgments

We are grateful to the National Basic Research Program of China (973 Program: 2003CB114400), National Natural Science Foundation of China (20276072), and National Natural Science Foundation of Zhejiang Province (2001062 and 2002095) for financial support.

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