Results 41 to 50 of about 296,130 (365)

Room-Temperature Alternative to the Arbuzov Reaction: The Reductive Deoxygenation of Acyl Phosphonates [PDF]

open access: yes, 2010
The reductive deoxygenation of acyl phosphonates using a Wolff−Kishner-like sequence is described. This transformation allows direct access to alkyl phosphonates from acyl phosphonates at room temperature. The method can be combined with acyl phosphonate
Dougherty, Dennis A.   +1 more
core   +2 more sources

Carboxylic Acid Production [PDF]

open access: yesFermentation, 2017
Carboxylic acids are central compounds in cellular metabolism, and in the carbon cycle in nature.[...]
openaire   +3 more sources

Enabling Heterogeneous Catalysis to Achieve Carbon Neutrality: Directional Catalytic Conversion of CO$_2$ into Carboxylic Acids [PDF]

open access: yesarXiv, 2022
The increase in anthropogenic carbon dioxide (CO$_2$) emissions has exacerbated the deterioration of the global environment, which should be controlled to achieve carbon neutrality. Central to the core goal of achieving carbon neutrality is the utilization of CO$_2$ under economic and sustainable conditions.
arxiv  

Synthesis and Characterization of Some New Coumarin Derivatives as Probable Breast Anticancer MCF-7 Drugs

open access: yesCrystals, 2021
This study aimed to synthesize quinolinone derivatives and investigate their cytotoxic activity. The compound 1-azacoumarin-3-carboxylic acid (2-oxo-1H-quinoline-3-carboxylic acid) was obtained via the cyclocondensation of 2-hydroxybenzaldehyde with ...
Ahmed Gaber   +5 more
doaj   +1 more source

An expedient route for the reduction of carboxylic acids to alcohols employing 1-propanephosphonic acid cyclic anhydride as acid activator [PDF]

open access: yes, 2012
A simple and efficient method for the synthesis of alcohols from the corresponding carboxylic acids is described. Activation of carboxylic acid with 1-propane phosphonic acid cyclic anhydride (T3P) and subsequent reduction of the intermediate phosphonic ...
Madhu, C.   +3 more
core   +1 more source

Ringed spherulitic and undulated textures in the nematic phase of a mixture of trans-4-hexylcyclohexanecarboxylic and benzoic acids [PDF]

open access: yesPhase Transitions, Volume 82, Issue 8 August 2009 , pages 620 - 631, 2009
We present a polarising optical microscopy study of a liquid-crystal mixture of trans-4-hexylcyclohexanecarboxylic acid (C6) and benzoic acid. Both materials have carboxylic groups that can form dimers through hydrogen bonding. The mixture is nematic and room temperature and has the clearing point at 88 Celsius.
arxiv   +1 more source

Valorization of Lignin by Partial Wet Oxidation Using Sustainable Heteropoly Acid Catalysts

open access: yesMolecules, 2017
The production of carboxylic acids by partial wet oxidation of alkali lignin at elevated temperatures and pressures was studied experimentally. Two different heteropoly acids, phosphotungstic acid (H3PW12O40) and phosphomolybdic acid (H3PMo12O40), were ...
Abayneh Getachew Demesa   +3 more
doaj   +1 more source

Direct deoxygenative borylation of carboxylic acids

open access: yesNature Communications, 2021
Converting a carboxylic acid into a boronic acid, which makes a useful chemical handle from a feedstock chemical, currently relies on decarboxylation and requires metal catalysts and prior functionalization.
Jianbin Li   +4 more
doaj   +1 more source

Photocatalytic direct borylation of carboxylic acids

open access: yesNature Communications, 2022
Boronic acids are useful reagents in organic synthesis and thus methods to prepare these compounds under mild conditions are desirable. Here, the authors synthesize boronic acids via photocatalytic decarboxylation of benzoic acids followed by borylation;
Qiang Wei   +8 more
doaj   +1 more source

Organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium or azolium enolates [PDF]

open access: yes, 2014
This tutorial review highlights the organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium/azolium enolates.
Morrill, Louis C., Smith, Andrew D.
core   +1 more source

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