Results 1 to 10 of about 5,456,471 (384)

Cobalt-catalyzed highly enantioselective hydrogenation of α,β-unsaturated carboxylic acids

open access: yesNature Communications, 2020
A large number of marketed drugs contains a chiral carboxylic acid scaffold. Here, the authors report the asymmetric hydrogenation of α,β-unsaturated carboxylic acids to α-chiral carboxylic acids using a cobalt catalyst bearing an electron-donating ...
Xiaoyong Du   +8 more
doaj   +2 more sources

Enabling heterogeneous catalysis to achieve carbon neutrality: Directional catalytic conversion of CO2 into carboxylic acids [PDF]

open access: yesCarbon Energy, 2022
The increase in anthropogenic carbon dioxide (CO2) emissions has exacerbated the deterioration of the global environment, which should be controlled to achieve carbon neutrality.
Xiaofei Zhang   +6 more
doaj   +2 more sources

Understanding biocatalyst inhibition by carboxylic acids [PDF]

open access: yesFrontiers in Microbiology, 2013
Carboxylic acids are an attractive biorenewable chemical in terms of their flexibility and usage as precursors for a variety of industrial chemicals.
Laura R Jarboe   +3 more
doaj   +4 more sources

Electrochemical Borylation of Carboxylic Acids [PDF]

open access: yesProceedings of the National Academy of Sciences, 2021
A simple electrochemically mediated method for the conversion of alkyl carboxylic acids to their borylated congeners is presented. This protocol features an undivided cell setup with inexpensive carbon-based electrodes and exhibits a broad substrate scope and scalability in both flow and batch reactors. The use of this method in challenging contexts is
Lisa M. Barton   +3 more
openaire   +4 more sources

Carbene and photocatalyst-catalyzed decarboxylative radical coupling of carboxylic acids and acyl imidazoles to form ketones

open access: yesNature Communications, 2022
The combination of carbene- and photocatalysis has enabled unorthodox routes to ketone syntheses, but usually requires engineered or activated substrates.
Shi-Chao Ren   +6 more
doaj   +2 more sources

Characterizing the growth of PHA-producing microorganisms on short-chain carboxylic acids [PDF]

open access: yesMicrobial Cell Factories
Short-chain carboxylic acids are important chemical intermediates in anaerobic treatment or thermal hydrolysis of biowaste. They are a crucial precursor for the production of Polyhydroxyalkanoate (PHA) by various microorganisms. However, there is limited
Steven Leonhardt   +3 more
doaj   +2 more sources

Visible Light–Induced Decarboxylative Radical Addition of Heteroaromatic Carboxylic Acids to Alkenes at Room Temperature in Two‐Molecule Photoredox System [PDF]

open access: yesChemistryOpen
The photoinduced decarboxylative radical addition of aryl carboxylic acids, including heteroaromatic carboxylic acids, to electron‐deficient alkenes is achieved in a two‐molecule photoredox system using a combination of biphenyl (BP) and 9,10 ...
Daisuke Suzuki   +5 more
doaj   +2 more sources

Formation of carboxylic acids during degradation of monosaccharides

open access: yesCzech Journal of Food Sciences, 2008
The formation of low molecular carboxylic and hydroxycarboxylic acids as well as sugar and deoxysugar acids from monosaccharides (D-glucose, D-fructose, D-arabinose, DL-glyceraldehyde, and 1,3-dihydroxyacetone) was studied in three different model ...
Ondřej Novotný   +2 more
doaj   +2 more sources

Application of cationic dye pyronin G (Y) for quantitative extraction-photometric determination of higher carboxylic acids in fi sh [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Серия Химия. Биология. Экология, 2022
The relevance of this study is due to the need to develop methods for the extraction and quantitative determination of higher carboxylic acids in fi sh. In this work, we propose a simple, inexpensive, and highly sensitive extraction-photometric technique
Zhylko, Viachaslau V.   +1 more
doaj   +1 more source

Mechanistic Investigations of Thermal Decomposition of Perfluoroalkyl Ether Carboxylic Acids and Short-Chain Perfluoroalkyl Carboxylic Acids

open access: yesEnvironmental Science and Technology, 2023
In this study, we investigated the thermal decomposition mechanisms of perfluoroalkyl ether carboxylic acids (PFECAs) and short-chain perfluoroalkyl carboxylic acids (PFCAs) that have been manufactured as replacements for phased-out per- and ...
A. Alinezhad   +7 more
semanticscholar   +1 more source

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