Results 21 to 30 of about 17,649 (161)

Reactivity of plasmalogens: kinetics of acid-catalyzed hydrolysis

Journal of Lipid Research, 1969
The acid-catalyzed hydrolysis of the α,β-unsaturated ether group of two plasmalogens, lysophosphatidal choline and lysophosphatidal ethanolamine, and several model compounds (isobutyl vinyl ether, 1-butenyl ethyl ether, and dihydropyran) was studied by ...
Michael F. Frosolono, Maurice M. Rapport
doaj   +1 more source

Substituted 2-Phenacylbenzoxazole Difluoroboranes: Synthesis, Structure and Properties

Molecules, 2020
Novel fluorescent dyes such as benzoxazole-boron complexes, bearing β-ketoiminate ligands, have been synthesized and characterized with a focus on the influence of a substituent on the basic photophysical properties.
Agnieszka Skotnicka, Przemysław Czeleń
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Naphthalene vs. Benzene as a Transmitting Moiety: Towards the More Sensitive Trifluoromethylated Molecular Probes for the Substituent Effects

Molecules, 2022
The application of DFT computational method (B3LYP/6-311++G(d,p)) to mono- and poly(CF3)substituted naphthalene derivatives helps to study changes in the electronic properties of these compounds under the influence of 11 substituents (-Br, -CF3, -CH3 ...
Adam Sokół, Henryk Koroniak, Marcin Hoffmann, Tomasz Siodła   +3 more
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Solvent free synthesis, spectral correlation and antimicrobial activities of some 2E 4′-nitrochalcones

Journal of Saudi Chemical Society, 2016
A series containing twelve substituted styryl 4′-nitrophenyl ketones have been synthesized using solvent free SiO2–H2SO4 catalysed aldol reaction under microwave condition. The yield of chalcones is found to be more than 80%.
Renganathan Arulkumaran, Rajasekaran Sundararajan, Sambandamoorthy Vijayakumar, S. Palanivel Sakthinathan, Ramamoorthy Suresh, Dakshnamoorthy Kamalakkannan, Kaliyaperumal Ranganathan, Ganesan Vanangamudi, Ganesamoorthy Thirunarayanan   +8 more
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Dependence of tautomerism on substituent type in o-hydroxy Schiff bases

Macedonian Journal of Chemistry and Chemical Engineering, 2019
Quantum computational methods were used to elucidate the structures of the o-hydroxy Schiff bases with different substituents. It is possible for a Schiff base to have different tautomeric structures depending on intramolecular proton transfer from the ...
Çiğdem Albayrak Kaştaş, Gökhan Kaştaş   +1 more
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Toward Universal Substituent Constants: Relating QTAIM Functional Group Descriptors to Substituent Effect Proxies

Journal of Chemical Information and Modeling, 2023
Substituents modulate reactions, but are commonly described using proxies to their true properties. Substituent descriptors from the Quantum Theory of Atoms in Molecules are related here to these proxies, which have historically had chemically intuitable effects.
Kevin M. Lefrancois-Gagnon, Robert C. Mawhinney   +1 more
openaire   +2 more sources

Structure-reactivity correlation for the kinetics of the reaction of substituted 4-phenyl-1,4-dihydropyridines formation [PDF]

Journal of the Serbian Chemical Society, 2013
Quantitative structure-reactivity correlations for the kinetics of the Hantzsch's synthesis of substituted 4-phenyl-1,4-dihydropyridines in the reaction between ethyl m- and p-substituted benzylidene acetoacetate and enamine has been studied ...
Urošević Jovica V., Drmanić Saša Ž., Nikolić Jasmina B., Juranić Ivan O., Jovanović Bratislav Ž.   +4 more
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Solvent-free synthesis of azomethines, spectral correlations and antimicrobial activities of some E-benzylidene-4-chlorobenzenamines

Bulletin of the Chemical Society of Ethiopia, 2015
Some azomethines including substituted benzylidene-4-chlorobenzenamines (E-imines) have been synthesized by fly-ash: PTS catalyzed microwave assisted condensation of 4-chloroaniline and substituted benzaldehydes under solvent-free conditions.
R. Suresh, S. P. Sakthinathan, D. Kamalakkannan, K. Ranganathan, K. Sathiyamoorthi, V. Mala, R. Arulkumaran, S. Vijayakumar, R. Sundararajan, G. Vanangamudi, M. Subramanian, G. Thirunarayanan, G. Vanaja, P. Kanagambal   +13 more
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Steric Effects on Reaction Rates Correlation Analysis of Solvolysis Data for Tertiary Carbon Substrates

CHIMIA, 1987
Rate constants for solvolysis of tertiary chlorides and p-nitrobenzoates are compared and converted to Bentley’s unified reactivity scale. For the majority of structures consistent behavior is observed. Deviations are interpreted in terms of F-strain dr,
Paul Müller, Jacky Blanc, Jiri Mareda
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Multivariate analysis of hydrophobic descriptors

ADMET and DMPK, 2014
Multivariate approaches like principal component analysis (PCA) are powerful tools to investigate hydrophobic descriptors and to discriminate between intrinsic hydrophobicity and polar contributions as hydrogen bonds and other electronic effects.
Stefan Dove
doaj   +1 more source