Results 1 to 10 of about 1,326,777 (407)

Synthesis of chiral sulfinate esters by asymmetric condensation

open access: yesNature, 2022
Achiral sulfur functional groups, such as sulfonamide, sulfone, thiol and thioether, are common in drugs and natural products. By contrast, chiral sulfur functional groups are often neglected as pharmacophores1–3, although sulfoximine, with its unique ...
Xin Zhang, Choon Wee Kee, Choon-Hong Tan
exaly   +2 more sources

Phthalic Acid Esters: Natural Sources and Biological Activities

open access: yesToxins, 2021
Phthalic acid esters (PAEs) are a class of lipophilic chemicals widely used as plasticizers and additives to improve various products’ mechanical extensibility and flexibility. At present, synthesized PAEs, which are considered to cause potential hazards
Ling-Qiao Huang   +6 more
semanticscholar   +1 more source

Hydrogen spillover assisted by oxygenate molecules over nonreducible oxides

open access: yesNature Communications, 2022
Spontaneous migration of H-atoms from metal particles to a nonreducible oxide support is generally limited by thermodynamics. Here, small oxygenate molecules are found to act as effective H-carriers to promote this process and lead to much improved ...
Mingwu Tan   +9 more
doaj   +1 more source

Effects of Organic Acids on the Release of Fruity Esters in Water: An Insight at the Molecular Level

open access: yesMolecules, 2022
It is well known that organic acids (OAs) could affect the flavour of fruit juices and beverages. However, the molecular mechanism of aroma release is still unclear. In this study, the effects of citric acid (CA), L-(-)-malic acid (MA) and L-lactic acid (
Yu Liu   +5 more
doaj   +1 more source

THE INVESTIGATION OF THE EFFECT OF PROCESS PARAMETERS ON THE YIELD OF BIODIESEL IN THE TRANSESTERIFICATION REACTION

open access: yesСовременная наука и инновации, 2022
The process of obtaining high-quality biodiesel from vegetable oils is not fully understood. Biodiesel is an environmentally friendly product, which makes it competitive with classic petroleum fuels. The biodiesel production process is influenced by many
G. V. Korotkova   +2 more
doaj   +1 more source

Esterification of propanoic acid in the presence of a homogeneous catalyst [PDF]

open access: yesKragujevac Journal of Science, 2022
Esters are organic compounds that are widely used even on an industrial scale, so their production has been extensively investigated. The aim of this work is to carry out the optimization process of esterification of propionic acid with lower monohydric ...
Kastratović Vlatko R.   +2 more
doaj   +1 more source

Features of the synthesis of pentaerythritol esters and carboxylic acids of aliphatic isomeric structure

open access: yesТонкие химические технологии, 2022
Objectives. Due to their structures, pentaerythritol esters have a number of appealing properties such as high viscosity index when used as oils and excellent compatibility with polyvinyl chloride when used as plasticizers.
V. V. Emelyanov   +4 more
doaj   +1 more source

One-Step Synthesis of Au-Ag Nanowires through Microorganism-Mediated, CTAB-Directed Approach

open access: yesNanomaterials, 2018
Synthesis and applications of one dimensional (1D) metal nanostructures have attracted much attention. However, one-step synthesis of bimetallic nanowires (NWs) has remained challenging.
Luhang Xu   +6 more
doaj   +1 more source

Single-pass transformation of syngas into ethanol with high selectivity by triple tandem catalysis

open access: yesNature Communications, 2020
Direct synthesis of ethanol from non-petroleum carbon resources via syngas (CO/H2) is a highly attractive but challenging target. Here, the authors report a triple tandem catalytic system for single-pass conversion of syngas into ethanol with selectivity
Jincan Kang   +7 more
doaj   +1 more source

Esters and amides of 3-R-2,8-dioxo-7,8-dihydro2H-pyrrolo[1,2-a][1,2,4]­triazino[2,3-c]quinazolin-5a(6H)-carboxylic(-propanoic) acids: synthesis and biological activity

open access: yesЖурнал органічної та фармацевтичної хімії, 2020
It is known that carboxyl groups bonded to aryl or hetaryl moieties play a role of the “pharmacophore” fragment in most NSAID molecules. It should be mentioned that the carboxyl group may cause the appearance of toxic effects and is characterized by ...
Viktor V. Stavytskyi   +4 more
doaj   +1 more source

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