Results 41 to 50 of about 30,682 (325)
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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Potassium (3-Methyl-2-oxido-1,2,5-oxadiazol-4-yl)dinitromethanide
Molbank, 2021 Furoxan derivatives enriched with explosophoric functionalities are promising compounds in the preparation of novel energetic materials. Herein, a previously unknown potassium (3-methyl-2-oxido-1,2,5-oxadiazol-4-yl)dinitromethanide (also referred to as ...
Egor S. Zhilin +2 more
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Molecules, 2023 In the present work, a combination of experimental and density functional theory (DFT) investigation of the (3+2) cycloaddition reactions of diazopropane with chalcone derivatives was reported. All calculations were performed using several DFT approaches
Sadeq M. Al-Hazmy +5 more
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BIOLOGICALLY ACTIVE OXADIAZOLE
Journal of Drug Delivery and Therapeutics, 2015 As we know that, Oxadiazole is a heterocyclic compound containing an oxygen atom and two nitrogen atoms in a five-membered ring and is derived from furan by substitution of two methylene groups (=CH) with two pyridine type nitrogen (-N=) [1,2]. There are three known isomers that is 1,2,4-oxadiazole, 1,2,3-oxadiazole and 1,2,5-oxadiazole (Figure 1.0 ...
Sanchit Srivastav, Chhama Shukla
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Metal Complexes of Oxadiazole Ligands: An Overview [PDF]
International Journal of Molecular Sciences, 2019 Oxadizoles are heterocyclic ring systems that find application in different scientific disciplines, from medicinal chemistry to optoelectronics. Coordination with metals (especially the transition ones) proved to enhance the intrinsic characteristics of these organic ligands and many metal complexes of oxadiazoles showed attractive characteristics for ...
Giovanni Salassa, Alessio Terenzi
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Quantum chemical research of the molecular structure of 3,4-dicyanofuroxan
Тонкие химические технологии, 2023 Objectives. The study set out to determine the equilibrium parameters of the 3,4-dicyanofuroxan molecule by means of molecule geometry optimization by quantum chemistry methods, verify the adequacy of the methods used, and compare the obtained results ...
I. N. Kolesnikova +3 more
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Two reaction routes for the preparation of aromatic polyoxadiazoles and polytriazoles: Syntheses and properties [PDF]
, 1994 Two reaction routes for the preparation of aromatic poly-1,3,4-oxadiazoles and poly-1,2,4-triazoles are studied and their influence on the physical properties, i.e., inherent viscosity, glass transition, degradation temperature, and film integrity of the
Boom, J.P. +6 more
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2-(4-Bromophenoxy)propanohydrazide
Acta Crystallographica Section E, 2009 The title compound, C9H11BrN2O2, is an important intermediate for the synthesis of heterocyclic compounds such as azoles, 2,5-disubstituted-1,3,4-oxadiazoles and 5-substituted 2-mercapto-1,3,4-oxadiazoles. The bromophenoxy group subtends a dihedral angle
Shahid Hameed +3 more
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Molecules, 2013 A facile three step synthesis of a group of N1,N5-bis[4-(5-alkyl-1,2,4-oxadiazol-3-yl)phenyl]glutaramides, N1,N5-bis[4-(1,2,4-oxadiazol-3-yl)phenyl]glutaramide and N1,N5-bis[4-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)phenyl]glutaramide is described. These
Annie Mayence +4 more
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Multistep Synthesis of 1,2,4-Oxadiazoles via DNA-Conjugated Aryl Nitrile Substrates.
Bioconjugate chemistry, 2019 A multistep protocol for the synthesis of 3,5-disubstituted 1,2,4-oxadiazoles on DNA-chemical conjugates has been developed. A set of six DNA-connected aryl nitriles were converted to corresponding amidoximes with hydroxylamine followed by the O ...
Huang-Chi Du +3 more
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