Chinese Journal of Applied Chemistry ›› 2010, Vol. 27 ›› Issue (03): 280-284.DOI: 10.3724/SP.J.1095.2010.90202

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Recyclable Rare Earth Metal(Ⅲ) Bis(perfluorooctanesulfonyl)imide Complex for
Catalytic Friedel-Crafts Alkylation Reaction in Fluorous Biphase System

HONG Mei, CHEN Ming-Gui, CAI Chun*   

  1. (Chemical Engineering College,Nanjing University of Science & Technology,Nanjing 210094)
  • Received:2009-03-25 Revised:2009-05-25 Published:2010-03-10 Online:2010-03-10
  • Contact: Chun Cai

Abstract:

The metal bis(perfluorooctanesulfonyl)imide complexes were prepared and used in Friedel-Crafts alkylation in fluorous biphasic system. The effects of  Lewis acid catalysts, reaction time, temperature and dosage of catalysts, as well as the catalytic reaction of different alkylating agents with  aromatic compounds in the presence of 0.2% molar fraction of Yb\[N(SO2C8F17)2]3 were investigated. All the experimental results show that metal bis(perfluorooctanesulfonyl)imide complexes were more effective for Friedel-Crafts alkylation than conventional Lewis acid catalysts. Furthermore, by simple phase-separation, the fluorous phase containing only catalyst could be re-utilized up to four times with a slight decrease in activity.

Key words: fluorous biphasic catalysis,metal bis(perfluorooctanesulfonyl)imide complex, perfluorocarbon,rare earth

CLC Number: