Journal ArticleDOI
Al-Free Sn-Beta Zeolite as a Catalyst for the Selective Reduction of Carbonyl Compounds (Meerwein−Ponndorf−Verley Reaction)
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The catalytic activity of Sn-Beta zeolite in the Meerwein-Ponndorf-Verley reduction of carbonyl compounds with secondary alcohols was performed with quantitative yields to the corresponding alcohol.Abstract:
The catalytic activity of Sn-Beta zeolite in the Meerwein−Ponndorf−Verley (MPV) reduction of carbonyl compounds with secondary alcohols was performed with quantitative yields to the corresponding alcohol. This heterogeneous catalyst exhibits activities and selectivities not observed before with other Me-zeolites.read more
Citations
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State of the art and future challenges of zeolites as catalysts
TL;DR: In this article, the potentiality of nanocrystalline, delaminated, or ultralarge pore catalysts and of zeolites formed by channels with different dimensions is outlined.
Journal ArticleDOI
Tin-containing zeolites are highly active catalysts for the isomerization of glucose in water
TL;DR: It is shown that a large-pore zeolite that contains tin (Sn-Beta) is able to isomerize glucose to fructose in aqueous media with high activity and selectivity, and enables Sn-Beta to couple isomerizations with other acid-catalyzed reactions, including hydrolysis/isomerization or isomerization/dehydration reaction sequences.
Journal ArticleDOI
Conversion of Sugars to Lactic Acid Derivatives Using Heterogeneous Zeotype Catalysts
TL;DR: A catalytic process for the direct formation of methyl lactate from common sugars by Lewis acidic zeotypes, such as Sn-Beta, catalyze the conversion of mono- and disaccharides that are dissolved in methanol tomethyl lactate at 160°C.
Journal ArticleDOI
Mechanism of Glucose Isomerization Using a Solid Lewis Acid Catalyst in Water
TL;DR: This is the first mechanistic demonstration of Sn-Beta acting as a Lewis acid in a purely aqueous environment and by way of an intramolecular hydride shift rather than proton transfer.
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"One-pot" synthesis of 5-(Hydroxymethyl)furfural from carbohydrates using tin-Beta zeolite
TL;DR: In this paper, a tin-containing, high-silica molecular sieve with the zeolite beta topology (Sn-Beta) can efficiently catalyze the isomerization of glucose to fructose in aqueous media at low pH.
References
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Journal ArticleDOI
Sn-zeolite beta as a heterogeneous chemoselective catalyst for Baeyer – Villiger oxidations
TL;DR: In this paper, the Baeyer-Villiger oxidation of saturated as well as unsaturated ketones by hydrogen peroxide was investigated, and the desired lactones formed more than 98% of the reaction products.
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Meerwein-ponndorf-verley reductions and oppenauer oxidations : an integrated approach
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Zeolite Beta: The Relationship Between Calcination Procedure, Aluminum Configuration and Lewis Acidity
P.J. Kunkeler,B.J. Zuurdeeg,J.C. van der Waal,J. A. van Bokhoven,D.C. Koningsberger,H. van Bekkum +5 more
TL;DR: In this article, the influence of (hydro)thermal treatments on the catalytic activity of zeolite Beta in the Lewis acid-catalyzed Meerwein-Ponndorf-Verley reduction of ketones was investigated.
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Enhanced catalytic activity of MCM-41-grafted aluminium isopropoxide in MPV reductions
TL;DR: In this article, aluminium alkoxide moieties are grafted onto purely siliceous mesoporous MCM-41 via siloxide linkages, producing materials which reveal enhanced catalytic activity in the MPV reduction of cyclic ketones; nitrogen physisorption and 27Al MAS NMR spectroscopy are applied to characterise the catalytically active hybrid systems.
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Zeolite titanium beta: a selective and water resistant catalyst in Meerwein-Ponndorf-Verley-Oppenauer reactions
TL;DR: Aluminium-free zeolite titanium beta was found to be a selective and water stable catalyst in the Meerwein-Ponndorf-Verley reduction of alkylcyclohexanones as discussed by the authors.