Journal ArticleDOI
Transformation of Aryl Acyloin O‐Alkyl and O‐Phenyl Derivatives to Ketones
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TLDR
In this article, the treatment of aryl acyloin (α-hydroxyketone) O−alkyl and O−phenyl derivatives with 2-3 equiv of Zn and 1 2 -equiv of NH4Cl in ethanol, refluxing for 20-120 min, gave the corresponding ketones with excellent yields.About:
This article is published in Synthetic Communications.The article was published on 2007-07-25. It has received 15 citations till now. The article focuses on the topics: Ketone & Aryl.read more
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Journal ArticleDOI
Isolation of Functionalized Phenolic Monomers through Selective Oxidation and CO Bond Cleavage of the β‐O‐4 Linkages in Lignin
TL;DR: Functionalized phenolic monomers have been generated and isolated from an organosolv lignin through a two-step depolymerization process, giving rise to a simple mixture of products that can be readily purified to give pure compounds.
Journal ArticleDOI
From models to lignin: Transition metal catalysis for selective bond cleavage reactions
Peter J. Deuss,Katalin Barta +1 more
TL;DR: In this article, a review of bond cleavage strategies relevant for lignin depolymerization using homogeneous catalysts focusing especially on reductive and hydrogen transfer methods is presented.
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Metal-free reductive cleavage of c-o sigma-bonds in acyloin derivatives by an organic neutral super-electron-donor
Sylvain P. Y. Cutulic,Neil J. Findlay,Shengze Zhou,Ewan James Turner Chrystal,John A. Murphy +4 more
TL;DR: This work has reported the first cleavage of C-O sigma-bonds by a neutral organic electron-donor in acyloin derivatives Ar(CO)CRR'OX and the methodology is applicable to a large array of substrates and the reduced counterparts were isolated in good to excellent yields.
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Photocatalytic Oxidation and Subsequent Hydrogenolysis of Lignin β-O-4 Models to Aromatics Promoted by In Situ Carbonic Acid
TL;DR: The cleavage of C-O bond in lignin β-O-4 model compounds to form aromatics has been achieved via a two-step process, comprising visible-light photocatalytic oxidation and in situ carbonic acid-facilitated hydrogenolysis as discussed by the authors.
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Microwave‐Assisted Dehalogenation of α‐Haloketones by Zinc and Ammonium Chloride in Alcohol
TL;DR: The treatment of α-haloketones with 1.5 equiv. of Zn and 1 equiv of NH4Cl in ethanol for 0.5min gave the corresponding ketones with excellent yields under microwave irradiation as discussed by the authors.
References
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"Site Selective" Formation of Low-Valent Titanium Reagents: An "Instant" Procedure for the Reductive Coupling of Oxo Amides to Indoles
TL;DR: Aromatic acylamido carbonyl compounds are readily cyclized to indole derivatives upon treatment with low-valent titanium reagents of the formal oxidation states 0,+1, and+2 as discussed by the authors.
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Titanium-induced syntheses of furans, benzofurans and indoles
Alois Fürstner,Denis N. Jumbam +1 more
TL;DR: In this article, the X-ray analysis of dianions from the aromatic aldehydes or ketones as reactive intermediates which attack the ester or amide functions in their proximity, rather than a radical path via ketyls.
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Protecting Groups That Can Be Removed through Photochemical Electron Transfer: Mechanistic and Product Studies on Photosensitized Release of Carboxylates from Phenacyl Esters
TL;DR: In this article, photolysis of electron-donating photosensitizers in the presence of various phenacyl esters (PhCOCH2−OCOR) results in C−O bond scission leading to the formation of acetophenone and the co...
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Lewis acid catalysis in supercritical carbon dioxide. Use of poly(ethylene glycol) derivatives and perfluoroalkylbenzenes as surfactant molecules which enable efficient catalysis in ScCO2.
Ichiro Komoto,Shu Kobayashi +1 more
TL;DR: Poly(ethylene glycol) derivatives or perfluoroalkylbenzenes were found to work as surfactants to dissolve organic materials in scCO(2) in the presence of Lewis acid catalyzed organic reactions such as aldol-, Mannich-, and Friedel-Crafts-type reactions.