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A group of 5-aza-7-substituted-1,4-dihydroquinoxaline-2,3-diones (QXs) and the corresponding 5-(N. oxyaza)-7-substituted QXs were prepared and evaluated as antagonists of ionotropic glutamate receptors. The in vitro potency of these QXs was determined by inhibition of [3H]-5,7- dichlorokynurenic acid ([3H]DCKA) binding to N-methyl-D-aspartate (NMDA)/glycine receptors, [3H]-(S)-alpha-amino-3-hydroxy-5-methyl-4- isoxazolepropionic acid ([3H]AMPA) binding to AMPA receptors, and [3H]kainate ([3H]KA) binding to KA receptors in rat brain membranes. 5-(N- Oxyaza)-QXs 12a-e all have low micromolar or submicromolar potency for NMDA/glycine receptors and low micromolar potencies for AMPA and KA receptors. QXs 12a-e display 2-12-fold selectivity for NMDA/glycine receptors compared to AMPA receptors, and ~2-fold difference between AMPA and KA potency. In contrast to other QXs that either show high selectivity for NMDA (such as ACEA 1021) or AMPA (such as NBQX) receptors, these molecules are broad spectrum antagonists of ionotropic glutamate receptors. 7-Nitro-5-(N- axyaza)-QX (12e) is the most potent inhibitor among 12a-e, having IC50 values of 0.69, 1.3, and 2.4 muM at NMDA, AMPA, and KA receptors, respectively. In functional assays on glutamate receptors expressed in oocytes by rat cerebral cortex poly(A+) RNA, 7-chloro-5-(N-oxyaza)-QX (12a) and 7-nitro-5(N-oxyaza)-QX (12e) have K(b) values of 0.63 and 0.31 muM for NMDA/glycine receptors, and are 6- and 4-fold selective for NMDA over AMPA receptors, respectively. 5-(N-Oxyaza)-7-substituted-QXs 12a-e all have surprisingly high in vivo potency as anticonvulsants in a mouse maximal electroshock-induced seizure (MES) model. 7-Chloro-5-(N-oxyaza)-QX (12a), 7- bromo-5-(N-oxyaza)-QX (12b), and 7-methyl-5-(N-oxyaza)-QX (12c) have ED50 values of 0.82, 0.87, and 0.97 mg/kg iv, respectively. The high in vivo potency of QXs 12a-e is particularly surprising given their low log P values (~ -2.7). Separate studies indicate that QXs 12a and 12e are also active in vive as neuroprotectants and also have antinociceptive activity in animal pain models. In terms of in vivo activity, these 5-(N-oxyaza)-7-substituted- QXs are among the most potent broad spectrum ionotropic glutamate antagonists reported.

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Methods of treating or preventing neuronal loss associated with stroke, ischemia, CNS trauma, hypoglycemia, and surgery, as well as treating neurodegenerative diseases including Alzheimer’s disease, amyotrophic lateral sclerosis, Huntington’s disease, and Down’s syndrome, treating or preventing the adverse consequences of the hyperactivity of the excitatory amino acids, as well as treating anxiety, chronic pain, convulsions, and inducing anesthesia are disclosed by administering to an animal in need of such treatment an alkyl or azido-substituted 1,4-dihydroquinoxaline-2,3-dione or pharmaceutically acceptable salts thereof, which have high binding to the glycine receptor.

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In an effort to develop ATP-competitive VEGFR-2 selective inhibitors, a series of new quinoxaline-based derivatives was designed and synthesized. The target compounds were biologically evaluated for their inhibitory activity against VEGFR-2. The design of the target compounds was accomplished after a profound study of the structure activity relationship (SAR) of type-II VEGFR-2 inhibitors. Among the synthesized compounds, 1-(2-((4-methoxyphenyl)amino)-3- oxo-3,4 dihydroquinoxalin-6-yl)-3-phenylurea (VIIa) displayed the highest inhibitory activity against VEGFR-2. Molecular modeling study involving molecular docking and field alignment was implemented to interpret the variable inhibitory activity of the newly synthesized compounds.

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We screened 1434 small heterocyclic molecules and identified thirteen 2,3,6-trisubstituted quinoxaline derivatives that were able to inhibit the Wnt/beta-catenin signal pathway and cell proliferation. In the screen, some of the hit compounds such as the ethylene group-coupled quinoxaline derivatives were shown to hold promise for use as potential small-molecule inhibitors of the Wnt/beta-catenin signal pathway in non-small-cell lung cancer cell lines.

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This paper describes the design and synthesis of a new class of molecules, the 3-sulfonylamino-2-(1H)-quinolones, which are potent and selective antagonists at both the AMPA/kainate site as well as at the NMDA-associated glycine site. The molecules were characterized by their binding affinities to rat cortical membranes and by electrophysiology on Xenopus oocytes injected with mRNA isolated from rat cerebral cortex. The most potent compound 61 has an IC50 of 0.09 muM for binding at the AMPA/kainate site, and 0.16 muM in oocyte electrophysiology.

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A series of ?drug-like? compounds based on quinoxaline scaffold with arylsulfonyl hydrazinyl, arylformyl hydrazinyl or arylsulfonyl groups at C-2 and aryloxy groups at C-3, were synthesized in 4 or 5 steps involving cyclization, chlorination and coupling reactions. Cellular anti-proliferative activities of these quinoxaline derivatives in vitro were determined, which revealed that the inhibitory potency and selectivity of 6f was comparable to that of the positive control.

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We have developed a novel fluorescent scaffold 4 which is a 9-nitro-2,3-dihydro-1H-pyrimido[1,2-a]quinoxalin-5-amine derivative from the reaction between di-tert-butyl but-2-ynedioate and a quinoxaline molecule containing a dimethyl amine side tail in high yield. The synthesis of scaffold 4 involves an sp3 C-N bond cleavage mechanism which is not very common. The scaffolds 4 is emissive in the visible range lambdaem ? (517-540) nm with large stokes shifts (5005-6378) cm-1 in ethanol. Laser confocal microscopy of the live HepG2 cells treated with compound 4f shows that it can be used for live cell imaging in nanomolar concentrations.

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Methods of treating or preventing neuronal loss associated with stroke, ischemia, CNS trauma, hypoglycemia, and surgery, as well as treating neurodegenerative diseases including Alzheimer’s disease, amyotrophic lateral sclerosis, Huntington’s disease, and Down’s syndrome, treating or preventing the adverse consequences of the hyperactivity of the excitatory amino acids, as well as treating anxiety, chronic pain, convulsions, and inducing anesthesia are disclosed by administering to an animal in need of such treatment an alkyl or azido-substituted 1,4-dihydroquinoxaline-2,3-dione or pharmaceutically acceptable salts thereof, which have high binding to the glycine receptor.

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New Advances in Chemical Research, May 2021. In heterogeneous catalysis, catalysts provide a surface to which reactants bind in a process of adsorption. Synthetic Route of 2379-56-8, In a article, mentioned the application of 2379-56-8, Name is 6-Nitroquinoxaline-2,3-dione, molecular formula is C8H3N3O4

Methods of treating or preventing neuronal loss associated with stroke, ischemia, CNS trauma, hypoglycemia and surgery, as well as treating neurodegenerative diseases including Alzheimer’s disease, amyotrophic lateral sclerosis, Huntington’s disease and Down’s syndrome, treating or preventing the adverse consequences of the hyperactivity of the excitatory amino acids, as well as treating anxiety, chronic pain, convulsions, inducing anesthesia and treating psychosis are disclosed by administering to an animal in need of such treatment a compound having high affinity for the glycine binding site, lacking PCP side effects and which crosses the blood brain barrier of the animal. Also disclosed are novel 1,4-dihydroquinoxaline-2,3-diones, and pharmaceutical compositions thereof. Also disclosed are highly soluble ammonium salts of 1,4-dihydroquinoxaline-2,3-diones.

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A series of mono-, di-, tri-, and tetrasubstituted 1,4- dihydroquinoxaline-2,3-diones (QXs) were synthesized and evaluated as antagonists at N-methyl-D-aspartate (NMDA)/glycine sites and alpha-amino-3- hydroxy-5-methylisoxazole-4-propionic acid-preferring non-NMDA receptors. Antagonist potencies were measured by electrical assays in Xenopus oocytes expressing rat whole brain poly(A)+ RNA. Trisubstituted QXs 17a (ACEA 1021), 17b (ACEA 1031), 24a, and 27, containing a nitro group in the 5 position and halogen in the 6 and 7 positions, displayed high potency (K(b) ~ 6-8 nM) at the glycine site, moderate potency at non-NMDA receptors (K(b) = 0.9-1.5 muM), and the highest (120-250-fold) selectivity in favor of glycine site antagonism over non-NMDA receptors. Tetrasubstituted QXs 17d,e were more than 100-fold weaker glycine site antagonists than the corresponding trisubstituted QXs with F being better tolerated than Cl as a substituent at the 8 position. Di- and monosubstituted QXs showed progressively weaker antagonism compared to trisubstituted analogues. For example, removal of the 5-nitro group of 17a results in a ~100-fold decrease in potency (10a,b,z), while removal of both halogens from 17a results in a ~3000-fold decrease in potency (10v). In terms of steady-state inhibition, most QX substitution patterns favor antagonism at NMDA/glycine sites over antagonism at non-NMDA receptors. Among the QXs tested, only 17i was slightly selective for non- NMDA receptors.

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