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Asymmetric transfer hydrogenation of ketones catalyzed by thermoregulated ionic liquid-regulating ruthenium complexes

Paper ID Volume ID Publish Year Pages File Format Full-Text
50214 46784 2015 5 PDF Available
Title
Asymmetric transfer hydrogenation of ketones catalyzed by thermoregulated ionic liquid-regulating ruthenium complexes
Abstract

•Ru(II) complexes of sulfonic-acid functionalised TsDPEN derivatives were prepared.•The Ru(II) complexes showed thermoregulated phase-separation behavior.•The Ru(II) complexes were used as efficient catalysts for ATH of various ketones.•The catalyst showed excellent enantioselectivity and recyclability.

A sulfonated chiral diamine ligand anion-based functionalized ionic liquid has been synthesized. Then the new ionic liquid-regulating ruthenium complexes were prepared successfully and employed as efficient catalysts for the asymmetric transfer hydrogenation of various ketones. The catalysts were highly efficient for the hydrogenation of a wide range of substrates bearing different functional groups and could be separated easily from the reaction mixture by thermoregulated phase separation, which can be efficiently recycled five times without significant changes in catalytic activity and enantioselectivity.

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Keywords
Asymmetric transfer hydrogenation; Ionic liquid; Thermoregulated phased-separation; Ruthenium complexes
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Asymmetric transfer hydrogenation of ketones catalyzed by thermoregulated ionic liquid-regulating ruthenium complexes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 67, 5 July 2015, Pages 90–94
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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