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Chiral supported ionic liquid phase (CSILP) catalysts for greener asymmetric hydrogenation processes

Paper ID Volume ID Publish Year Pages File Format Full-Text
55258 47045 2013 11 PDF Available
Title
Chiral supported ionic liquid phase (CSILP) catalysts for greener asymmetric hydrogenation processes
Abstract

Chiral supported ionic liquid phase (CSILP) catalysts were prepared by physical adsorption (within highly porous carbons or mesoporous silica) of Ir, Ru and Rh complexes as IrCl(COD)-(S,S)-BDPP, [IrCl-(S)-BINAP]2, RuCl(p-cymene)[(S,S)-Ts-DPEN], RuOTf(p-cymene)[(S,S)-Ts-DPEN], [Rh(COD)(S,S)-DIPAMP][BF4], and [Rh(COD)(R,R)-Me-DuPHOS][BF4]. For the syntheses of CSILP catalysts [EMIM][NTf2], [BMIM][BF4] and [BMIM][PF6] ionic liquids were used. Comparative homogeneous and heterogeneous experiments were carried out using the asymmetric hydrogenation of double CN and CC bonds in trimethylindolenine, 2-methylquinoline and dimethylitaconate, respectively. The conversion and enantioselectivity was found to depend on the nature of the complex (metal and ligand), the immobilization method used, nature of the ionic liquid, nature of the support and the experimental conditions.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (334 K)Download as PowerPoint slideHighlights► CSIP catalysts were prepared by physical adsorption within high porous carbons and mesoporous silica. ► Ir, Ru and Rh chiral complexes were used as stereoselective catalysts. ► [EMIM][NTf2], [BMIM][BF4] and [BMIM][PF6] ionic liquids were used in the preparation of CSIP catalysts. ► Homogeneous and heterogeneous asymmetric hydrogenation of double CN bond of trimethylindolenine and 2-methylquinoline. ► Homogeneous and heterogeneous asymmetric hydrogenation of double CC bond of dimethylitaconate.

Keywords
Ionic liquids; Chiral complexes; MCM-41; Carbonaceous foams; Asymmetric hydrogenation
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Chiral supported ionic liquid phase (CSILP) catalysts for greener asymmetric hydrogenation processes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 200, 1 February 2013, Pages 63–73
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us