Results 111 to 120 of about 18,306 (270)
Molecules, 2015 A series of five novel bis-1,5-disubstituted-1H-tetrazoles (bis-1,5-DS-1H-T) were quickly prepared by a catalyst-free Ugi-azide repetitive process from easily accessible starting materials in excellent yields, either at room temperature (88%–95%) or ...
Luís E. Cárdenas-Galindo +4 more
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Chalcones as versatile synthons for the synthesis of 5- and 6-membered nitrogen heterocylces [PDF]
, 2014 Chalcones belong to the flavonoid family which constitutes one of the major classes of naturally occurring oxygen heterocyclic compounds. The alpha,beta-unsaturated carbonyl system of chalcones possesses two electrophilic reactive centers allowing them ...
Albuquerque, Hélio +3 more
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Tetrazolium Compounds: Synthesis and Applications in Medicine
Molecules, 2015 Tetrazoles represent a class of five-membered heterocyclic compounds with polynitrogen electron-rich planar structural features. This special structure makes tetrazole derivatives useful drugs, explosives, and other functional materials with a wide range
Cheng-Xi Wei, Ming Bian, Guo-Hua Gong
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The first metal complexes of 3,3'-bi-1,2,4-oxadiazole: A curiously ignored ligand [PDF]
, 2006 The crystal structure of 3,3'-bi-1,2,4-oxadiazole (1) reveals a planar centrosymmetric structure for this molecule in the solid state. It forms a mononuclear complex (3) with palladium(II) chloride, which is shown by X-ray crystallography to contain the ...
Richardson, C., Steel, P.J.
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Polymethylenetetrazole: Synthesis, Characterization, and Energetic Properties
MoleculesThe tetrazole moiety remains one of the most interesting scaffolds in the development of new high-energy density materials (HEDMs) because of its desired characteristics, such as high nitrogen content and heat of formation (HOF).
Ljubica Brenjo +6 more
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CHIMIA, 2007 This mini-review concerns the broad application of (S)- and (R)-5-pyrrolidin-2-yl-1H-tetrazoles as organocatalysts. A summary of methods for their synthesis is followed by a discussion of the general reaction mechanism and subsequent analysis of
Deborah A. Longbottom +2 more
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Tautomeric Equilibria Studies by Mass Spectrometry [PDF]
, 2008 Tautomerism in organic chemistry has been extensively studied in condensed phase by spectrometric methods, mainly by IR and NMR techniques. Mass spectrometry studies start 40 years ago but just recently it has been recognized the importance of the mass ...
Eduardo A. Castro +3 more
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An Efficient One-Pot Three-Component Synthesis of Novel Sulfanyl Tetrazoles Using Ionic Liquids
Journal of Chemistry, 2013 An efficient, simple, and environmentally benign method for the synthesis of novel sulfanyl tetrazoles has been achieved by one-pot three-component reaction of phenacyl bromides/3-(2-bromoacetyl)coumarins with KSCN and NaN3 using [Bmim]BF4 ionic liquid ...
Sankari Kanakaraju +2 more
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Optimasi Sifat Inhibitor Korosi Senyawa Thiaamida-pirazolindol Berdasarkan Teori Fungsional Kerapatan [PDF]
, 2016 . Corrosion inhibitor properties of thiamide pyrazolindole and its derivatives has been elucidated by means of density functional theory (DFT) at B3LYP/6-31G(d) level of theory.
Arduha, J. (Jannatin) +3 more
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Acta Crystallographica Section E, 2011 The title compound C6H12N4, is one of a few known tetrazoles with an alkyl chain in the 5-position. The asymmetric unit contains two independent molecules. The molecules are linked by N—H...N interactions into chains with graph-set notation D(2)
Heiner Detert +2 more
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