Results 11 to 20 of about 9,595 (171)
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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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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2,3-Diethylbenzo[g]quinoxaline [PDF]
IUCrData, 2020 The title compound, C16H16N2, was synthesized by dispersing 3,4-hexanedione in a methanol–water solution containing the acid catalyst NH4HF2, then adding 1,2-diaminonaphthalene. The fused-ring system of the title compound is close to planar (r.m.s. deviation = 0.028 Å); one of the pendant methyl C atoms lies close to the ring plane [deviation = 0.071 ...
Guy Crundwell, Ashley Leeds
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2-(3-Nitrophenoxy)quinoxaline [PDF]
Acta Crystallographica Section E Structure Reports Online, 2010 In the title mol-ecule, C(14)H(9)N(3)O(3), the dihedral angle between the quinoxaline and benzene rings is 77.13 (9)°. The mol-ecule is twisted about the ether-benzene O-C bond, with a C-O-C-C torsion angle of -102.8 (2)°. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming layers in the ab plane, with one nitro O atom accepting two ...
Hassan, N.D. +5 more
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Molecules, 2014 We report the synthesis and antimalarial activities of eighteen quinoxaline and quinoxaline 1,4-di-N-oxide derivatives, eight of which are completely novel. Compounds 1a and 2a were the most active against Plasmodium falciparum strains.
Ana Gil +7 more
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(Phenyl)(3-phenylsulfonyl-1,2-dihydropyrrolo[1,2-a]quinoxalin-1-yl)methanone
Acta Crystallographica Section E, 2011 In the title molecule, C24H18N2O3S, the 13-atom ring system comprising the quinoxaline and fused five-membered ring exhibits an r.m.s. deviation from coplanarity of 0.039 Å, with a maximum deviation of 0.0710 (10)  ...
Yaşar Dürüst +2 more
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7,8-Dimethyl-11H-indeno[1,2-b]quinoxalin-11-one
IUCrData, 2021 In the title compound, C17H12N2O, the mean planes of the indene ring and quinoxaline system (r.m.s. deviations = 0.0131 and 0.0082 Å) are approximately parallel to one another, making a dihedral angle of 1.2 (5)°.
Lin Chen, Jin Hu, Hong-Shun Sun
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Chemistry, Synthesis, and Structure Activity Relationship of Anticancer Quinoxalines
Chemistry, 2023 Quinoxaline is a fused heterocycle system of a benzene ring and pyrazine ring. It has earned considerable attention due to its importance in the field of medicinal chemistry.
Mohamed F. Zayed
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Acta Crystallographica Section E Structure Reports Online, 2010 A new Z' = 1 crystal structure of quinoxaline (or 1,4-diaza-naphthalene), C(8)H(6)N(2), with one-fifth the volume of the earlier known Z' = 5 structure was obtained by means of an in situ cryocrystallization technique.
Ranganathan, Sathishkumar +3 more
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Aminoquinoxaline-Based Dual Colorimetric and Fluorescent Sensors for pH Measurement in Aqueous Media
Chemosensors, 2022 This research is focused on the development of pH indicators based on the quinoxaline signaling group for acidic aqueous solutions (pH 1–5). A push–pull quinoxaline QC1 in which two electron-donating (3-aminopropyl)amino substituents are attached to ...
Elizaveta V. Ermakova +2 more
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