Results 11 to 20 of about 46,339 (188)
Synthesis, characterization, and antimicrobial evaluation of new Schiff bases derived from vanillic acid conjugated to heterocyclic 4H-1,2,4-triazole-3-thiol [PDF]
Pharmacia, 2023 A multistep synthesis was established for the preparation of a new vanillic acid-1, 2, 4-1triazole-3-thiol conjugate (4). Finally, several aromatized aldehydes reacted with compound (4) to produce Schiff bases derivatives (5–11).
Noor Ali Hussein Sabzi +1 more
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Synthesis of New Pyrazoline - Phenoxathiin Derivatives
مجلة بغداد للعلوم, 2013 Phenoxathiin was prepared by the reaction of diphenyl ether with sulfur in the presence of anhydrous aluminum chloride. This work comprised the synthesis of new phenoxathiin derivatives containing heterocyclic moieties.
Baghdad Science Journal
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Antinociceptive grayanane-derived diterpenoids from flowers of Rhododendron molle
Acta Pharmaceutica Sinica B, 2020 Twelve new grayanoids (1−12) along with five known compounds were isolated from flowers of Rhododendron molle. Their structures were fully characterized using a combination of spectroscopic analyses, computational calculations, and single crystal X-ray ...
Yong Li +7 more
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X-ray Structures of 3-Acetyloxazolidin-2-one, 3-Acetyloxazolin-2-one and Oxazolin-2(3H)-one
Molbank, 2022 The X-ray structures of three simple heterocyclic compounds have been obtained for the first time. Structures of both 3-acetyloxazolidin-2-one 1 and its unsaturated analogue 3-acetyloxazolin-2-one 3 show a planar imide nitrogen with the exocyclic C=O ...
R. Alan Aitken +2 more
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Chemistry Central Journal, 2017 Background The thiophene nucleus has been recognized as an important entity in the synthesis of heterocyclic compounds with promising pharmacological characteristics.
Yahia Nasser Mabkhot +5 more
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Synthesis and Antibacterial Activity of bis Heterocyclic Derivatives of 1,3,4-thiadiazole
Iraqi Journal of Pharmaceutical Sciences, 2017 The Chemistry of heterocyclic sulphur and nitrogen containing compounds have a great role in the field of scientific studies, The 2-amino 5-mercapto-1,3,4-thiadiazole ring for instance, has gained more importance in recent years because they are ...
Ahlam A. Al-jubouri, Ahlam J. Qasir
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Molecules, 2017 Thirty six novel heterocyclic derivatives of ethyl 2-(2-pyridylacetate) were efficiently synthesized. The new compounds involve the linkage of a 2-pyridyl ring with thiosemicarbazide (compounds 1–7), 1,2,4-triazole (compounds 1a–7a), 1,3,4-thiadiazole ...
Daniel Szulczyk +7 more
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International Journal of Electrochemical Science, 2012 Quantum chemical calculations using the Density Functional Theory (DFT) method at three different basis sets, namely, 6-31(d,p), 6-31+(d,p) and 6-311G(d,p) were performed on selected triazole and benzimidazole derivatives, namely 2-aminobenzimidazole ...
Mwadham M. Kabanda +6 more
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Molecules, 2015 Triazole derivatives constitute an important group of heterocyclic compounds have have been the subject of extensive study in the recent past. These compounds have shown a wide range of biological and pharmacological activities.
Lidija Kosychova +6 more
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Crystal structure of 4-(2-bromopropionyl)-3-phenylsydnone
Acta Crystallographica Section E, 2014 Sydnones are a class of mesoionic compounds containing a five-membered heterocyclic ring. In general, sydnone compounds are synthesized with an aromatic substutuent at the N3 position. This feature, adds to the stability of the heterocyclic ring.
D. Grossie, L. Harrison, K. Turnbull
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