Results 61 to 70 of about 5,507 (218)
Synthesis of Some 1,4-Bis (Substituted 1,3,4-Oxadiazoles and 1,2,4-Triazoles) Benzene From Terephthalic Acid [PDF]
مجلة التربية والعلم, 1999 In this paper the synthesis of some 1,4-bis-(substituted1,3,4-oxadiazoles and 1,2,4-trizoles) benzene from terephthalic acid is reported. Terephthalic acid was esterified with absolute ethanol in presence of concentrated sulfuric acid to give ethyl ...
K. Daoud, E. Mahmood, M. Salih
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Electrophilic Iodination of Heterocyclic Compounds. Recent Advances 2008–2025: Part II
European Journal of Organic Chemistry, Volume 29, Issue 22, 9 June 2026.Electrophilic iodination using molecular iodine and iodide sources represents an efficient approach for accessing valuable iodinated organic compounds. This review highlights recent advances in the iodination of heterocyclic compounds from 2008 to 2025, emphasizing the role of heteroaryl iodides as important synthetic intermediates for biologically ...
Njomza Ajvazi, Stojan Stavber
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ChemistryOpen, 2019 1,2,4‐Oxadiazole[4,5‐a]piridinium chloride adds nucleophiles to undergo electrocyclic ring opening affording 1,2,4‐oxadiazole dienamino derivatives. These pyridinium salts represent a special class of Zincke salts that are prone to rearrange when treated
Dr. Stefano Carella +2 more
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Molecules, 2019 A useful method for the synthesis of 2-acylamino-1,3,4-oxadiazoles was developed. By using potassium iodate as an oxidant in water at 60 °C, a wide range of 2-acylamino-1,3,4-oxadiazoles were afforded in moderate to excellent yields within two hours.
Tianlei Li +4 more
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Inorganics, 2023 Benzo[c][1,2,5]oxadiazoles and benzo[c][1,2,5]thiadiazoles are recognized to possess potent pharmacological activities including anticancer potential. In continuation of our research endeavors in the development of boron-based heterocycles as potential ...
Sasmita Das +2 more
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Recent Advances in the Chemistry of 1,2,4-Oxadiazoles
, 2015 1,2,4-Oxadiazoles experienced an almost 80-year long period of scientific lethargy before they tickled the curiosity of chemists. The study of chemical and photochemical reactivity of 1,2,4-oxadiazoles opened the way to a series of applications in ...
Ivana Pibiri +7 more
core +1 more source
Aggregate, Volume 7, Issue 6, June 2026.Two novel extended electron‐deficient central cores (Tz‐Qx, Dz‐Qx) with F/Cl‐substituted terminal groups synergistically optimize small molecule acceptors. Tz‐Qx‐4F outperforms Dz‐Qx‐based counterparts, achieving 19.50% PCE (29.3 mA cm−2 JSC) when blended with D18, thus providing valuable insights for designing high‐performance organic solar cell ...
Lan Xie +10 more
wiley +1 more source
Pharmaceuticals, 2022 2,5-Disubstituted 1,3,4-oxadiazoles are privileged versatile scaffolds in medicinal chemistry that have exhibited diverse biological activities. Acetyl- (AChE) and butyrylcholinesterase (BChE) inhibitors are used, e.g., to treat dementias and myasthenia ...
Václav Pflégr +5 more
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Beilstein Journal of Organic Chemistry, 2017 A versatile continuous-flow synthesis of highly functionalized 1,2,4-oxadiazoles starting from carboxylic acids is reported. This process was applied to the multistep synthesis of imidazo[1,2-a]pyridin-2-yl-1,2,4-oxadiazoles, using a three reactor ...
Ananda Herath, Nicholas D. P. Cosford
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Synthesis of 2-Isobutyl, 2-Isobutyl-5-aryl and 2-Isobutyl-5-thiol-1,3,4-Oxadiazoles [PDF]
مجلة التربية والعلم, 2007 In this paper the synthesis of some substituted 1,3,4-oxadiazoles from isobutyric acid was studied. The isobutyric acid was converted into the corresponding ethyl ester, which then treated with hydrazine hydrate in ethanol to give the acid hydrazide. The
Hadil S. Aziz, Khalid M. Daoud
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