Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.molcata.2006.11.050
Title: Enhanced enantioselectivity of chiral hydrogenation catalysts after immobilisation in thin films of ionic liquid
Authors: Fow, K.L.
Jaenicke, S. 
Müller, T.E.
Sievers, C.
Keywords: Enantioselectivity
Hydrogenation
Immobilisation
Ionic liquid
Ketone
Two-phase catalysis
Issue Date: 18-Jan-2008
Citation: Fow, K.L., Jaenicke, S., Müller, T.E., Sievers, C. (2008-01-18). Enhanced enantioselectivity of chiral hydrogenation catalysts after immobilisation in thin films of ionic liquid. Journal of Molecular Catalysis A: Chemical 279 (2) : 239-247. ScholarBank@NUS Repository. https://doi.org/10.1016/j.molcata.2006.11.050
Abstract: Chiral organometallic complexes were immobilized in silica supported thin films of ionic liquid. The heterogenized catalysts were tested in the hydrogenation of acetophenone, which was chosen as test reaction for the enantioselective reduction of prochiral ketones. High enantioselectivities (up to 74% ee) were achieved in supported ionic liquids using a catalyst/substrate pair, which showed no enantioselectivity in methanol. This is attributed to the unique solvent properties of ionic liquids including the formation of solvent cages of ionic liquid molecules around the complexes. Within these cages, transition states are modified and chemical transformations follow alternative reaction pathways. © 2006 Elsevier B.V. All rights reserved.
Source Title: Journal of Molecular Catalysis A: Chemical
URI: http://scholarbank.nus.edu.sg/handle/10635/76121
ISSN: 13811169
DOI: 10.1016/j.molcata.2006.11.050
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