Results 21 to 30 of about 26,379 (326)
Quinoxaline-2-carbonitrile [PDF]
Acta Crystallographica Section E Structure Reports Online, 2009 In the title compound, C9H5N3, the quinoxaline ring is essentially planar, with a maximum deviation of 0.012 (1) Å. Short intermolecular distances between the centroids of the 2,3-dihydropyrazine and benzene rings [3.6490 (5) Å] indicate the existence of π⋯π interactions.
Hoong‐Kun Fun +4 more
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A Dual-Protein Cascade Reaction for the Regioselective Synthesis of Quinoxalines.
Organic Letters, 2020 In this work, an efficient dual-protein (lipase and hemoglobin) system was successfully constructed for the regioselective synthesis of quinoxalines in water. A set of quinoxalines were obtained in high yields under optimal reaction conditions. This dual-
Fengxi Li +6 more
semanticscholar +1 more source
Molecules, 2016 An investigation on the effect of substituent at the 2-position of mono-substituted quinoxalines in the synthesis of di-substituted quinoxaline derivatives via nucleophilic substitution reactions, is reported.
Ndumiso Thamsanqa Ndlovu +1 more
doaj +1 more source
Biotransformation of quinoxaline by Streptomyces badius [PDF]
Letters in Applied Microbiology, 1996 Quinoxaline, a mutagenic azaarene produced in foods during cooking, was added to cultures of Streptomyces badius ATCC 39117. After 24 h, the cultures were extracted with ethyl acetate. Two major metabolites were purified by liquid chromatography and identified by mass spectrometry and nuclear magnetic resonance spectroscopy as 3,4-dihydro-2(1H ...
Sutherland, J. B. +3 more
openaire +4 more sources
Molecules, 2019 Despite major advancements in the development of various chemotherapeutic agents, treatment for lung cancer remains costly, ineffective, toxic to normal non-cancerous cells, and still hampered by a high level of remissions.
Mixo Aunny Sibiya +5 more
doaj +1 more source
Thermochemical and Theoretical Studies of 2-Hydroxyquinoxaline, 2,3-Dihydroxyquinoxaline, and 2-Hydroxy-3-methylquinoxaline [PDF]
, 2000 The standard (p° = 0.1 MPa) molar enthalpies of formation for crystalline 2-hydroxyquinoxaline, 2,3-dihydroxyquinoxaline, and 2-hydroxy-3-methylquinoxaline were derived from the standard molar enthalpies of combustion, in oxygen, at T = 298.15 K ...
Matos, M. A. R. +4 more
core +1 more source
Dual Allosteric Effect in Glycine/NMDA Receptor Antagonism: A Comparative QSAR Approach
Pharmaceuticals, 2010 A comparative Hantzsch type QSAR study was conducted using multiple regression analysis on various sets of quinoxalines, quinoxalin-4-ones, quinazoline-2-carboxylates, 4-hydroxyquinolin-2(1H)-ones, 2-carboxytetrahydroquinolines, phenyl-hydroxy-quinolones,
Vipin B. Gupta, Manish Sharma
doaj +1 more source
Condensation of 4-hydroxy-2-thiazolines with 1,2-phenylenediamine as a novel effective route to thiazolo[3,4-a]quinoxalines [PDF]
, 2004 Thiazolo[3,4-a]quinoxalin-4-ones were prepared in two steps starting from methyl phenylchloropyruvate using a new strategy for the construction of the ring system. A key step in this new method involves the reaction of 4-hydroxytetrahydrothiazoles with 1,
Gubaidullin, Aidar T +4 more
core +1 more source
Molecules, 2009 The reaction of 3-mercaptopropylsilica (MPS) and chlorosulfonic acid in chloroform afforded silica bonded S-sulfonic acid (SBSSA), which was used as a catalyst for the room temperature synthesis of quinoxaline derivatives from 1,2-diamino compounds and 1,
Khodabakhsh Niknam +2 more
doaj +1 more source
2-(4-Chloroanilino)quinoxaline [PDF]
Acta Crystallographica Section E Structure Reports Online, 2008 There are two mol-ecules in the asymmetric unit of the title compound, C(14)H(10)ClN(3), with dihedral angles of 5.11 (10) and 13.61 (10)° between the aromatic ring systems. In the crystal structure, mol-ecules are linked by N-H⋯N hydrogen bonds, resulting in chains propagating in [010].
Idris, A. +4 more
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