Results 171 to 180 of about 34,622 (239)
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Critical reviews in analytical chemistry, 2022
Oxadiazoles, especially 1,3,4-oxadiazole scaffolds, stand among the foremost heterocyclic fragments with a broad spectrum of applications in diverse fields, including pharmacology, polymers, material science, and organic electronics, among others.
D. Sharma, H. Om, A. Sharma
semanticscholar +1 more source
Oxadiazoles, especially 1,3,4-oxadiazole scaffolds, stand among the foremost heterocyclic fragments with a broad spectrum of applications in diverse fields, including pharmacology, polymers, material science, and organic electronics, among others.
D. Sharma, H. Om, A. Sharma
semanticscholar +1 more source
Organic Letters, 2021
Herein, we report a novel organocatalytic process for synthesis of complex 1,3,4-oxadiazoles from readily accessible aldehydes. By exploiting the nucleophilicity of the putative Breslow intermediate and the inherent electrophilicity of α-diazo iodonium ...
Hang Huang +5 more
semanticscholar +1 more source
Herein, we report a novel organocatalytic process for synthesis of complex 1,3,4-oxadiazoles from readily accessible aldehydes. By exploiting the nucleophilicity of the putative Breslow intermediate and the inherent electrophilicity of α-diazo iodonium ...
Hang Huang +5 more
semanticscholar +1 more source
Journal of Fluorine Chemistry, 1992
Abstract Some new polyfluorinated 1,3,4-oxadiazoles have been obtained via a two-step method. The cycloadditions of the 1,3,4-oxadiazoles have been studied and an analysis of the energies of the frontier orbitals calculated by the MNDO method indicates a LUMO-dependent pathway for cycloaddition.
N.V. Vasiliev +3 more
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Abstract Some new polyfluorinated 1,3,4-oxadiazoles have been obtained via a two-step method. The cycloadditions of the 1,3,4-oxadiazoles have been studied and an analysis of the energies of the frontier orbitals calculated by the MNDO method indicates a LUMO-dependent pathway for cycloaddition.
N.V. Vasiliev +3 more
openaire +1 more source
, 2020
Repurposing of known drugs and compounds as anticoronavirus disease 2019 (anti-COVID-19) agents through biological reevaluation of their activities, specially the antisevere acute respiratory syndrome coronavirus 2 (anti-SARS-CoV-2) activities, is a new ...
A. Rabie
semanticscholar +1 more source
Repurposing of known drugs and compounds as anticoronavirus disease 2019 (anti-COVID-19) agents through biological reevaluation of their activities, specially the antisevere acute respiratory syndrome coronavirus 2 (anti-SARS-CoV-2) activities, is a new ...
A. Rabie
semanticscholar +1 more source
Poly‐1,3,4‐oxadiazoles. I. Polyphenylene‐1,3,4‐oxadiazoles
Journal of Polymer Science Part A: General Papers, 1965AbstractPolyphenylene‐1,3,4‐oxadiazoles have been prepared from benzenedicarboxylic acids or their derivatives and hydrazine by solution polycondensation in fuming sulfuric acid or polyphosphoric acid. These polymers were characterized by good thermal stability, and the molecular weights attained were high enough for the products to exhibit fiber‐or ...
Yoshio Iwakura +2 more
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Poly‐1,3,4‐oxadiazoles. III. Alicyclic poly‐1,3,4‐oxadiazoles
Die Makromolekulare Chemie, 1966AbstractSome alicyclic poly‐1,3,4‐oxadiazoles were prepared from cycloalkanedicarboxylic dihydrazides or from cycloalkanedicarboxylic acids and hydrazine sulfate by solution polycondensation in polyphosphoric acid. These polymers were characterized by high melting temperature.
Yoshio Iwakura +2 more
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Journal of Molecular Spectroscopy, 1967
Abstract The infrared absorption spectrum of 1,3,4-oxadiazole has been recorded in the region 5000-400 cm −1 in the vapor and in the liquid phases, in CS 2 and C 2 Cl 4 solutions. Also, the infrared absorption spectrum of liquid 2,5-dimethyl-1,3,4-oxadiazole was recorded in the same region. A tentative assignment of the fundamental vibrations of 1,
Daniel Højgaard Christensen +2 more
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Abstract The infrared absorption spectrum of 1,3,4-oxadiazole has been recorded in the region 5000-400 cm −1 in the vapor and in the liquid phases, in CS 2 and C 2 Cl 4 solutions. Also, the infrared absorption spectrum of liquid 2,5-dimethyl-1,3,4-oxadiazole was recorded in the same region. A tentative assignment of the fundamental vibrations of 1,
Daniel Højgaard Christensen +2 more
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ChemInform Abstract: 1,3,4‐Oxadiazole
ChemInform, 2014AbstractReview: use of oxadiazole derivatives in in various field like polymer industry and, ost notably, medicinal chemistry; 70 refs.
S. B. Dave, P. Godhani, Y. Ushir
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ChemistrySelect
Bacterial infections, particularly those associated with methicillin‐resistant Staphylococcus aureus (MRSA) and vancomycin‐resistant Enterococcus (VRE), threaten public health and economies, with rising antibiotic resistance resulting in more deaths ...
Ahmed E. M. Mekky +6 more
semanticscholar +1 more source
Bacterial infections, particularly those associated with methicillin‐resistant Staphylococcus aureus (MRSA) and vancomycin‐resistant Enterococcus (VRE), threaten public health and economies, with rising antibiotic resistance resulting in more deaths ...
Ahmed E. M. Mekky +6 more
semanticscholar +1 more source
Perfluoro-bis-1,3,4 oxadiazoles
Bulletin of the Academy of Sciences, USSR Division of Chemical Science, 19651. The hydrazides of perfluorodicarboxylic acids of the general formula NH2NHCO(CF2)nCONHNH2 (n= 3,4,8,12) were produced by the action of hydrazine hydrate on the diethyl esters of the perfluorodicarboxylic acids in alcohol solutions. 2.
M. P. Krasuskaya +2 more
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