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Copper-cationic salphen catalysts for the oxidation of cyclohexene by oxygen

Paper ID Volume ID Publish Year Pages File Format Full-Text
49525 46751 2015 4 PDF Available
Title
Copper-cationic salphen catalysts for the oxidation of cyclohexene by oxygen
Abstract

•Some new copper-salphen complexes with two cationic sites were prepared.•The types of counteranion in ionic compounds could affect the catalytic activity.•The catalyst activity can be controlled by changing the solvent polarity.

The modified copper-cationic salphen catalysts were synthesized and used in the allylic oxidation of cyclohexene to 2-cyclohexen-1-ol and 2-cyclohexen-1-one with oxygen under mild conditions. Compared with their unmodified counterpart, the catalytic activities of modified catalysts are improved. The type of counteranion could affect the reactivity of catalyst, which offers an opportunity to improve the catalysts via changing counteranions to optimize the selectivity. The cation–anion interaction can be adjusted by different solvents, which in turn influences the catalyst reactivity. Furthermore, these novel catalysts can be reused without sacrificing the activity.

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Keywords
Copper-cationic salphen catalyst; Allylic oxidation; Counteranion
First Page Preview
Copper-cationic salphen catalysts for the oxidation of cyclohexene by oxygen
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 59, 10 January 2015, Pages 97–100
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis