Results 201 to 210 of about 22,841 (254)
Antimicrobial, Antimalarial, and Antileishmanial Activities of Mono‐ and Bis‐quaternary Pyridinium Compounds [PDF]
Chemical Biology and Drug Design, 2010 Pyridinium‐based oxime compounds have been utilized worldwide as antidotes following exposure to anticholinesterase agents. In the event of combined chemical and biological incident, it is of vital importance to know the ability of antidotes to provide additional protection against biological threats.
Sandip B Bharate, Charles M Thompson
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The Journal of Chemical Physics, 2008
The dynamics of the pyridinium cation in thiourea pyridinium nitrate inclusion compound has been studied using quasielastic neutron scattering in a wide temperature range (10–350K). The elastic incoherent structure factor was determined from neutron backscattering and time-of-flight measurements and its analysis allows to describe in detail the ...
A, Pajzderska, M A, Gonzalez, J, Wasicki
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The dynamics of the pyridinium cation in thiourea pyridinium nitrate inclusion compound has been studied using quasielastic neutron scattering in a wide temperature range (10–350K). The elastic incoherent structure factor was determined from neutron backscattering and time-of-flight measurements and its analysis allows to describe in detail the ...
A, Pajzderska, M A, Gonzalez, J, Wasicki
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Oxidation of Active Methylene Compounds by Pyridinium Chlorochromate
Synthetic Communications, 1988Abstract 1-Aryl-1,2-diketones 6 have been obtained by pyridinium chlorochromate oxidation of benzylketones 5. In the same way 2-buten-1, 4-olide 2 and 3H-benzofuran-2-one 4 have been obtained.
Francesco Bonadies, Carlo Bonini
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Excited-state dynamics of thiophene substituted betaine pyridinium compounds
Phys. Chem. Chem. Phys., 2014This work deals with the photophysics of novel pyridinium betaine based on 2-pyridin-1-yl-1H-benzimidazole (SBPa) substituted symmetrically by mono- (Th2SBPa) and bi-thiophene fragments (Th4SBPa). The study is based on a combination of steady-state, femtosecond transient absorption spectroscopic measurements supported by PCM-(TD)DFT calculations. It is
Aloïse, S. +8 more
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1,1′-Alkylene bis-pyridinium compounds as pickling inhibitors
Corrosion Science, 1990The inhibition efficiencies of 1,1′-alkylene bis-pyridinium compounds have been studied for corrosion of mild steel in 0.5 M H2SO4. Substitution in the pyridine ring (R = CH3, COOH etc.) has a pronounced effect on the inhibition efficiency, though the length of the alkyl chain bound to the quaternary nitrogen atom is markedly reduced.
G. Subramaniam +2 more
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QSAR and Combinatorial Science, 2006 Two-dimensional (2D) and three-dimensional (3D) quantitative structure activity relationship (QSAR) studies have been carried out on a series of 55 bis-pyridinium compounds to find out the structural requirements of choline kinase (ChoK) inhibitors.
G Narahari Sastry
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On the reported pyridinium pentachlorothallate(III) and some related compounds
Inorganica Chimica Acta, 1984Abstract While (C 5 H 6 N) 2 TlCl 5 cannot be prepared in water via the reported procedure it may be obtained in non-aqueous media. Although its low-energy infrared spectrum contains broad peaks and the Raman spectrum is deceptively simple, comparison of these spectra with those of other TlCl 4 − , TlCl 5 3− and TlCl 6 3− derivatives shows that
Mary B. Millikan, Bruce D. James
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Formation of quaternary pyridinium compounds by the action of glutaraldehyde on proteins
Journal of the Chemical Society, Chemical Communications, 19761-(5-Amino-5-carboxypentyl)pyridinium chloride hydrochloride (2) has been isolated by acid hydrolysis of the product of the action of glutaraldehyde on ovalbumin, supporting the view that the chromophore with λmax ca. 265 nm formed when glutaraldehyde reacts with proteins is due to the formation of quaternary pyridinium compounds.
Paul M. Hardy +2 more
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Antithrombotic Effects of Pyridinium Compounds Formed from Trigonelline upon Coffee Roasting
Journal of Agricultural and Food Chemistry, 2014Coffee may exert a preventive effect on arterial thrombosis. Trigonelline is one of the most abundant compounds in coffee that undergoes pyrolysis upon roasting of coffee beans. The aim of the present study was to identify pyridinium compounds formed upon trigonelline pyrolysis and coffee roasting and to investigate the effect of three of them, i.e., 1-
Bartlomiej Kalaska +2 more
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Acta Crystallographica Section C Crystal Structure Communications, 2004
The title compounds, C7H8Cl2N+.Cl- and C7H8Br2N+.Br-, are isomorphous. In the crystal packing, layers parallel to the ac plane are formed by a classical N(+)-H...X- hydrogen bond (X = halogen) and two X...X contacts. A third X...X contact links the layers, and a fourth, which is however very long, completes a ladder-like motif of halogen atoms ...
Virginia, Lozano, Peter G, Jones
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The title compounds, C7H8Cl2N+.Cl- and C7H8Br2N+.Br-, are isomorphous. In the crystal packing, layers parallel to the ac plane are formed by a classical N(+)-H...X- hydrogen bond (X = halogen) and two X...X contacts. A third X...X contact links the layers, and a fourth, which is however very long, completes a ladder-like motif of halogen atoms ...
Virginia, Lozano, Peter G, Jones
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