Journal Article10.1007/S10562-009-9852-Y
Enantioselective Hydrogenation of (E)-α-phenylcinnamic Acid over Cinchonidine-modified Pd Catalysts Supported on TiO2 and CeO2
Takashi Kubota,Hiroaki Kubota,Toshihisa Kubota,Emi Moriyasu,Takayuki Uchida,Yuriko Nitta,Takashi Sugimura,Yasuaki Okamoto +7 more
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TL;DR: In this paper, the effects of the catalyst support, reaction temperature, and concentration of the modifier were examined to optimize supported Pd-catalysts and reaction conditions for the achievement of higher enantiomeric excess in the hydrogenation of (E)-α-phenylcinnamic acid.
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Abstract: The effects of the catalyst support, reaction temperature, and concentration of the modifier were examined to optimize supported Pd-catalysts and reaction conditions for the achievement of higher enantiomeric excess in the hydrogenation of (E)-α-phenylcinnamic acid. Over 90% of enantioselectivity was achieved using a cinchonidine-modified 40 wt% Pd/TiO2 catalyst at 288 K.
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Citations
Recent Progress in Heterogeneous Asymmetric Hydrogenation of C═O and C═C Bonds on Supported Noble Metal Catalysts
Fabian Meemken,Alfons Baiker +1 more
TL;DR: This Review provides a systematic account of the research accomplished in the past decade on noble metal-based heterogeneous asymmetric hydrogenation of prochiral C═O and C═C bonds, including all important facets of these catalytic systems.
301
Green organophotocatalysis. TiO2-induced enantioselective α-oxyamination of aldehydes
TL;DR: In this article, a heterogeneous TiO2 photocatalyst is used as a photooxidant in place of toxic and expensive chemical oxidants, for the first time in chemo- and stereoselective bond formation.
47
Heterogeneous asymmetric hydrogenation over chiral molecule-modified metal particles
TL;DR: In this paper, the background of heterogeneous asymmetric hydrogenation and the remaining challenges in this field are briefly introduced and highlighted recent important progress in the understanding of the reaction mechanism in terms of the acidbase properties of supports and the effects of the size/shape of metal particles.
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Is amine addition vital for highly enantioselective hydrogenation of α,β-unsaturated carboxylic acid over cinchonidine-modified palladium?
Tae Yeon Kim,Takashi Sugimura +1 more
TL;DR: Benzylamine (BA) is a commonly employed additive for the hydrogenation of α,β-unsaturated acids over the cinchonidine-modified palladium catalyst, but the BA addition effects largely depend on the reaction solvent as discussed by the authors.
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Preparation and Characterization of TiO2 Coated Multi-walled Carbon Nanotube-supported Pd and its Catalytic Performance in the Asymmetric Hydrogenation of α,β-Unsaturated Carboxylic Acids
TL;DR: In this paper, a nanotube-supported Pd catalyst was used for enantioselective hydrogenation of α,β-unsaturated carboxylic acids using cinchonidine as a chiral modifier.
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