Catalysis Letters

, Volume 98, Issue 2–3, pp 95–101 | Cite as

Use of Ionic Liquids as Solvents for Epoxidation Reactions Catalysed by a Chiral Katsuki-Type Salen Complex: Enhanced Reactivity and Recovery of Catalyst

  • Keith Smith
  • Shifang Liu
  • Gamal A. El-Hiti
Article

Abstract

The Katsuki-type catalyst 2 has been recycled several times following its use in a model epoxidation reaction of 1,2-dihydronaphthalene in an ionic liquid, 3a or 3b. The enantioselectivity was comparable to that in dichloromethane, but recovery of the catalyst was easier, activity was higher, and activity and enantioselectivity were retained in recovered ionic liquid fractions to a much greater extent than those for the Jacobsen-type catalyst 1.

Ionic liquids Katsuki-type chiral catalyst Two-phase systems Epoxidation 1 2-dihydronaphthalene. 

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Copyright information

© Plenum Publishing Corporation 2004

Authors and Affiliations

  • Keith Smith
    • 1
  • Shifang Liu
    • 1
  • Gamal A. El-Hiti
    • 1
  1. 1.Department of ChemistryCentre for Clean Chemistry, University of Wales SwanseaSwanseaUK

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