Results 11 to 20 of about 2,794,131 (212)
Nickel-Catalyzed Three-Component Difluoroalkylation-Amination for the Direct Access to Anti-Inflammatory β-Difluoroalkyl Amines. [PDF]
Adv Sci (Weinh)A nickel‐catalyzed three‐component reductive fluoroalkylation‐amination strategy of N‐vinylamides for the direct access to the α‐amidyl‐β‐difluoroalkyl amines was reported here. The synthetic method features with broad substrate scope, mild conditions, high functional group tolerance, and convenience to handle.
Xu C +8 more
europepmc +2 more sources
Dynamics of cetyltrimethylammonium bromide mediated reaction of phenylsulfinylacetic acid with Cr(VI): Treatment of pseudo-phase models [PDF]
Journal of the Serbian Chemical Society, 2015 micellar effect % Hammett correlation % Piszkiewicz cooperative model KR nema The influence of cetyltrimethylammonium bromide, CTon the oxidative decarboxylation of phenylsulfinylacetic acid, PSAA and several meta- and para-substituted PSAAs by Cr ...
Subramaniam Perumal +1 more
doaj +1 more source
Synthesis of some substituted pyrazole-1- carbothioamides and spectral correlations in 3-(2,4-dibromophenyl)-5-(substituted phenyl)-4,5-dihydro-1H-pyrazole-1- carbothioamides [PDF]
QScience Connect, 2013 Background: This study aims to synthesise a series of 1-thiocarbomyl pyrazolines, including 3-(2,4-dibromophenyl)-5-(substituted phenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamides, using solvent-free fly-ash:PTS catalyzed cyclization between chalcones and
G. Thirunarayanan, K. G.Sekar
doaj +1 more source
Hammett correlation and reaction mechanisms in mechanochemical imine formation [PDF]
28th Croatian Meeting of Chemists and Chemical Engineers (28HSKIKI): Book of Abstracts, 2023 Solution-based physical organic chemistry was marked by the development of Hammett correlation, which further served as a major tool for deciphering the mechanisms of organic reactions in solution. If applicable to mechanochemical reactions, it will provide support for understanding the reaction mechanisms and expansion of this important synthetic ...
Vugrin, Leonarda +3 more
openaire +2 more sources
Molecules, 2020 The attribution of 1H and 13C NMR signals of a library of 5-, 6- and 7-substituted 2,2-dimethylchroman-4-one derivatives is reported. Substituent effects were interpreted in terms of the Hammett equation, showing a good correlation for carbons para- to ...
Daniela Iguchi +3 more
doaj +1 more source
Compounds, 2023 The ability for density functional theory with the B3LYP functional with the lanl2dz basis set to predict the 1st (Wave 1) and 2nd (Wave 2) reductions of the diazine ring in a series of thirty-seven (37) 1,4-di-N-oxide quinoxaline-2-carboxamide ...
Faranak Pooladian +4 more
doaj +1 more source
Hammett Correlations in the Chemistry of 3-Phenylpropyl Radicals
The Journal of Physical Chemistry A, 2011 The energetics and kinetics of the reaction of variously substituted benzyl radicals with a model alkene were calculated at the G3(MP2)-RAD//B3-LYP/6-31G(d) level of theory to determine whether such reactions are amenable to Hammett analysis. The reactions were studied both in the gas phase and in toluene solution in the temperature range 298-353 K ...
Modglin, James D. +4 more
openaire +3 more sources
Hammett Spectral Correlations in Benzofuranyl Flavonols
International Letters of Chemistry, Physics and Astronomy, 2014 A series containing eleven benzofuranyl flavonols have been prepared by cyclization of 3-hydroxybenzofuranyl chalcones with 30% hydrogen peroxide in the presence of sodium bicarbonate. The synthesized flavonols were characterized by their physical constants, analytical and spectroscopic data. The infrared spectral
Ganesamoorthy Thirunarayanan, K.G. Sekar
openaire +1 more source
A spectrophotometric study of the protonation processes of some N-[1-(benzimidazol)-1-yl]methylbenzamide derivatives [PDF]
Journal of the Serbian Chemical Society, 2000 The protonation of N-[1-(benzimidazol)-1-yl]methylbenzamide derivatives in aqueous acids (H2SO4) media was investigated, using a spectrophotometric method. The investigated compounds have two protonation processes. The first protonation process occurs in
NADA U. PERISIC-JANJIC +2 more
doaj +2 more sources
Acta Chimica Slovenica, 2017 Iodine-catalyzed transformations of alcohols under solvent-free reaction conditions (SFRC) and under highly concentrated reaction conditions (HCRC) in the presence of various solvents were studied in order to gain insight into the behavior of the ...
Marjan Jereb, Dejan Vražič
doaj +1 more source