Category: quinoxaline

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 32717-95-6, is researched, Molecular C16H16Cl2Cu2, about Iridium(I)-Catalyzed α-C(sp3)-H Alkylation of Saturated Azacycles, the main research direction is saturated azacycle regioselective alkylation alkene iridium amidoxime directing group; iridium regioselective alkylation catalyst.Reference of Chloro(1,5-cyclooctadiene)copper(I) dimer.

Saturated azacycles are commonly encountered in bioactive compounds and approved therapeutic agents. The development of methods for functionalization of the α-methylene C-H bonds of these highly privileged building blocks is of great importance, especially in drug discovery. While much effort has been dedicated towards this goal of using a directed C-H activation approach, the development of directing groups that are both general, as well as practical, remains a significant challenge. Herein, the design and development of novel amidoxime directing groups is described for Ir(I)-catalyzed α-C(sp3)-H alkylation of saturated azacycles using readily available olefins as coupling partners. This protocol extends the scope of saturated azacycles to piperidines, azepane, and tetrahydroisoquinoline that are incompatible with our previously reported directing group. A variety of olefin coupling partners, including previously unreactive di-substituted terminal olefins and internal olefins, are compatible with this transformation. The selectivity for a branched α-C(sp3)-alkylation product is also observed for the first time when acrylate is used as the reaction partner. The development of practical, one-step installation and removal protocols further add to the utility of amidoxime directing groups.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 8-Hydroxyquinoline 1-oxide(SMILESS: OC1=CC=CC2=CC=C[N+]([O-])=C12,cas:1127-45-3) is researched.Recommanded Product: 16400-32-1. The article 《8-Hydroxyquinolines are bactericidal against Mycobacterium tuberculosis》 in relation to this compound, is published in Drug Development Research. Let’s take a look at the latest research on this compound (cas:1127-45-3).

There is an urgent need for new treatments effective against Mycobacterium tuberculosis, the causative agent of tuberculosis. The 8-hydroxyquinoline series is a privileged scaffold with anticancer, antifungal, and antibacterial activities. We conducted a structure-activity relationship study of the series regarding its antitubercular activity using 26 analogs. The 8-hydroxyquinolines showed good activity against M. tuberculosis, with min. inhibitory concentrations (MIC90) of <5μM for some analogs. Small substitutions at C5 resulted in the most potent activity. Substitutions at C2 generally decreased potency, although a sub-family of 2-styryl-substituted analogs retained activity. Representative compounds demonstrated bactericidal activity against replicating M. tuberculosis with >4 log kill at 10× MIC over 14 days. The majority of the compounds demonstrated cytotoxicity (IC50 of <100μM). Further development of this series as antitubercular agents should address the cytotoxicity liability. However, the 8-hydroxyquinoline series represents a useful tool for chem. genomics to identify novel targets in M. tuberculosis. From this literature《8-Hydroxyquinolines are bactericidal against Mycobacterium tuberculosis》,we know some information about this compound(1127-45-3)Application In Synthesis of 8-Hydroxyquinoline 1-oxide, but this is not all information, there are many literatures related to this compound(1127-45-3).

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Recommanded Product: 32717-95-6. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Chloro(1,5-cyclooctadiene)copper(I) dimer, is researched, Molecular C16H16Cl2Cu2, CAS is 32717-95-6, about Infrared and Raman spectra of 1,5-cyclooctadiene complexes of copper(I), silver(I), gold(I), and gold(III) and the nature of the gold compounds.

There have been several recent reports on the spectra of C2H4 and 1,5-cyclooctadiene complexes of d8 metallic ions which have shown that 2 bands in the vibrational spectrum of the olefin are sensitive to the coordinated metal. A series of d10 ions were complexed to 1,5-cyclooctadiene and a shift was found having the order Au(I) ∼ Cu(I) > Ag(I). Three distinct compounds were also formed between 1,5-cyclooctadiene and Au(III) or Au(I) and their ir spectra and suggested structures are reported.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Formula: C16H16Cl2Cu2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Chloro(1,5-cyclooctadiene)copper(I) dimer, is researched, Molecular C16H16Cl2Cu2, CAS is 32717-95-6, about Chemistry of copper(I) β-diketonate complexes. VI. Synthesis, characterization and chemical vapor deposition of 2,2-dimethyl-6,6,7,7,8,8,8-heptafluoro-3,5-octanedione (fod) copper(I) (fod)CuL complexes and the solid state structure of (fod)Cu(PMe3). Author is Chi, K. M.; Corbitt, T. S.; Hampden-Smith, M. J.; Kodas, T. T.; Duesler, E. N..

A series of copper(I) compounds of the general formula (fod)CuL, where fod = 2,2-dimethyl-6,6,7,7,8,8,8-heptafluoro-3,5-octanedione, and L = PMe3, PEt3, 1,5-cyclooctadiene (1,5-COD), vinyltrimethylsilane (VTMS), 2-butyne, bis(trimethylsilyl)acetylene (BTMSA), have been prepared by the reaction of Na[fod] with CuCl in the presence of the appropriate amount of the Lewis base, L. All the compounds were characterized by elemental anal., 1H, 13C, 19F, 31P and IR spectroscopies. The spectroscopic data are consistent with the chelation of the β-diketonate ligand through its oxygen atoms to the copper(I) center. The anal. data are consistent with the empirical formula (fod)CuL. One compound, (fod)CuPMe3, was characterized in the solid-state by single-crystal x-ray diffraction which confirmed the empirical formula and revealed the monomeric nature of this species in the solid state. The distorted trigonal planar coordination environment observed for this species is common to these species. The Cu-O distances are significantly different within the limits of error on the data possibly as a result of inductive effects of the different β-diketonate substituents. Hot- and cold-wall chem. vapor deposition experiments revealed that these species are generally not suitable as precursors for the deposition of copper due to their low thermal stability. While pure copper films could be deposited, as determined by Auger electron spectroscopy, from the compounds (fod)CuL, where L = PMe3, 2-butyne and BTMSA, heating the precursors to increase their vapor pressures resulted in significant thermal decomposition in the source reservoir. As a result, deposition rates of only 100 Å/min were achieved. No selectivity was observed on W vs. SiO2 substrates under the conditions employed. The other compounds, (fod)CuL, where L = 1,5-COD, VTMS, were too thermally unstable for CVD experiments

From this literature《Chemistry of copper(I) β-diketonate complexes. VI. Synthesis, characterization and chemical vapor deposition of 2,2-dimethyl-6,6,7,7,8,8,8-heptafluoro-3,5-octanedione (fod) copper(I) (fod)CuL complexes and the solid state structure of (fod)Cu(PMe3)》,we know some information about this compound(32717-95-6)Formula: C16H16Cl2Cu2, but this is not all information, there are many literatures related to this compound(32717-95-6).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Related Products of 57825-30-6. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1-(Bromomethyl)-4-ethylbenzene, is researched, Molecular C9H11Br, CAS is 57825-30-6, about Discovery of Orally Available Runt-Related Transcription Factor 3 (RUNX3) Modulators for Anticancer Chemotherapy by Epigenetic Activation and Protein Stabilization. Author is Yang, Jee Sun; Lee, Chulho; Cho, Misun; Kim, Hyuntae; Kim, Jae Hyun; Choi, Seonghwi; Oh, Soo Jin; Kang, Jong Soon; Jeong, Jin-Hyun; Kim, Hyun-Jung; Han, Gyoonhee.

Recently, the authors identified a novel strategy for anticancer chemotherapy by restoring runt-related transcription factor 3 (RUNX3) levels via lactam-based histone deacetylase (HDAC) inhibitors that stabilize RUNX3. Described here are the synthesis, biol. evaluation, and pharmacokinetic evaluation of new synthetic small mols. based on pyridone-based HDAC inhibitors that specifically stabilize RUNX3 by acetylation and regulate its function. Many of the newly synthesized compounds showed favorable RUNX activities, HDAC inhibitory activities, and inhibitory activities on the growth of human cancer cell lines. Notably, one of these new derivatives, I , significantly restored RUNX3 in a dose-dependent manner and showed high metabolic stability, a good pharmacokinetic profile with high oral bioavailability and long half-life, and strong antitumor activity. This study suggests that pyridone-based analogs modulate RUNX3 activity through epigenetic regulation as well as strong transcriptional and post-translational regulation of RUNX3 and could be potential clin. candidates as orally available RUNX3 modulators for the treatment of cancer.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Application In Synthesis of Nickel(ii)fluoridetetrahydrate. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Parameters of dosimetric interest of some vanadium and nickel compounds. Author is Singh, Tejbir; Kaur, Paramjeet; Singh, Parjit S..

Mass attenuation coefficients (μm), effective at. numbers (Zeff) and electron densities (Nel) of some V compounds V2O3, VO2, VF3, VF4, NH4VO3 and Ni compounds NiF2, NiCl2, NiCl2.6H2O, Ni(ClO4)2.6H2O, NiF2.4H2O have been computed over a wide energy region from 10 keV to 100 GeV. In all the parameters, a similar trend is observed All the parameters initially possesses maximum values, which decreases very rapidly upto 100 keV, then becomes almost constant upto 3 MeV and with the further increase in the incident photon energy beyond 3 MeV, values of all the parameters also increase which may be due to dominance of different partial photon interaction process in different energy regions.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Chloro(1,5-cyclooctadiene)copper(I) dimer( cas:32717-95-6 ) is researched.Safety of Chloro(1,5-cyclooctadiene)copper(I) dimer.Havlin, Robert; McMahon, Michael; Srinivasan, Ranjani; Le, Hongbiao; Oldfield, Eric published the article 《Solid-State NMR and Density Functional Investigation of Carbon-13 Shielding Tensors in Metal-Olefin Complexes》 about this compound( cas:32717-95-6 ) in Journal of Physical Chemistry A. Keywords: carbon 13 shielding metal olefin complex; NMR carbon 13 shielding olefin complex; density functional NMR carbon 13 shielding. Let’s learn more about this compound (cas:32717-95-6).

The authors determined the principal elements of the chem. shift tensors for metal-olefin complexes: [Ag(cod)2]BF4 (cod = cis,cis-cycloocta-1,5-diene), [CuCl(cod)]2, PtCl2(cod), [RhCl(cod)]2, and K[PtCl3(C2H4)] using magic-angle sample spinning and a Bayesian probability method to deduce μ, ρ in the Herzfeld-Berger equations. These principal elements also were computed by using d. functional methods with two different types of functionals and partial geometry optimization. The overall slope and R2 values between the theor. and exptl. tensor elements are good, ranging from 1.06 to 1.16 for the slope (vs. the ideal value of 1) and 0.98-0.99 for the goodness of fit parameter R2 (vs. the ideal value of 1). The use of a hybrid functional results in a slightly worse slope, an effect which is largest for the compounds with the largest paramagnetic shifts. There are no particularly good correlations between C-C bond lengths, isotropic/anisotropic shift tensor elements or computed bond orders; however, the correlation between shielding and (Mulliken) charge of ∼-120 ppm/electron is consistent with previous exptl. estimates on olefins and aromatic compounds The orientations of the shielding tensor elements in the cod complexes change in a relatively continuous manner with increases in shielding (from d10 to d8 metals), with δ33 becoming highly rotated (37.5°) from the normal to the C:C bond axis in [RhCl(cod)]2. Overall, these results indicate that d. functional methods now permit the relatively accurate reproduction of metal-ligand shielding patterns in systems whose structures are known, which should facilitate their use in probing metal-ligand geometries in systems whose structures are less certain, such as in metalloproteins.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Quinoline-5,8-quinones》. Authors are Petrow, Vladimir; Sturgeon, Bennett.The article about the compound:8-Hydroxyquinoline 1-oxidecas:1127-45-3,SMILESS:OC1=CC=CC2=CC=C[N+]([O-])=C12).Computed Properties of C9H7NO2. Through the article, more information about this compound (cas:1127-45-3) is conveyed.

5-Amino-8-hydroxyquinoline sulfate (1 g.) in 10 mL. 10% H2SO4 and Na2Cr2O7 in H2O, the whole extracted with CHCl3, the CHCl3 extracts concentrated and the residue diluted with petr. ether gave 0.35 g. quinoline-5,8-quinone, light yellow needles, m. 129° (decomposition). 8-Hydroxy-5-nitrosoquinaldine (5.8 g.) in 100 mL. H2O and 6.3 g. NaOH treated with about 13 g. Na2S2O4 (I) and neutralized with AcOH gave 5-amino-8-hydroxyquinaldine (II); II as above gave 2 g. quinaldine-5,8-quinone, yellow-green prisms, m. 145° (decomposition) (from EtOH-petr. ether). Similarly 8-hydroxy-5-nitroso-7-methylquinoline gave the amine (III), yellow prisms, m. 155° (decomposition) (from C6H6), and III gave the quinone, light yellow needles, m. 181-2° (from EtOH-petr. ether). A solution of PhN2Cl (from 7 g. PhNH2.HCl and 4 g. NaNO2) added during 20 min. at 0-3° to 8.5 g. 5-amino-O-methylquinoline in 50 mL. AcOH, 200 mL. H2O, and 25 g. AcONa gave 9 g. 5-amino-6-methyl-8-phenylazoquinoline-HCl (IV), red-brown plates, m. 216° (from EtOH-petr. ether). IV (12 g.), 60 cc. concentrated HCl, 50 mL. H2O, and 150 mL. EtOH refluxed 2.5 h. gave 7 g. HCl salt, m. 212° (from EtOH), of the 5-HO analog (V), fine red needles m. 177° (from EtOH). V (1.5 g.) in EtOH, Pd-C, and H gave 0.5 g. 8-amino-5-hydroxy-6-methylquinoline (VI), pale brown plates, m. 216° (from EtOH). VI gave 6-methylquinoline-5,8-quinone, yellow needles, m. 188° (from CHCl3-petr. ether). 2,6-Dimethylquinoline (3.0 g.) in 8,5 mL. cold concentrated H2SO4, treated with 1.5 mL. concentrated HNO3 in 2.0 mL. concentrated H2SO4 2 h. on the steam bath, and the whole poured into cold dilute aqueous NH3 gave 3.8 g. 2,6-dimethyl-5-nitroquinoline (VII), pale yellow prisms, m. 106° (from pert. ether). VII (2.5 g.), 25 mL. 80% EtOH, 1 mL. concentrated HCl, and 6 g. reduced Fe gave 2.0 g. 5-amino analog (VIII), green needles, m. 190° (from C6H6-petr. ether), and VIII as above gave 60% 2,6-dimethylquinoline-5,8-quinone (IX), yellow plates, m. 150°, also obtained via 5-amino-2,6-dimethyl-8-phenylazoquinoline-HCl, red plates with green reflex, m. 210°, and 5-hydroxy-2,6-dimethyl-8-phenylazoquinoline, dark red fluffy needles, m. 168° (from EtOH), and 8-amino-5-hydroxy-2,6-dimethylquinoline (X) (X was very sensitive to air oxidation and was used directly without purification). Finely powd. 8-hydroxy-5-nitrosoquinoline (3 g.) added to 9 mL. concentrated HNO3 and 6 mL. H2O and kept 1.25 h. at 17° gave a precipitate of 8-hydroxy-5-nitroquinoline-HNO3; the whole cooled to 0° made alk. with cold KOH solution, and the red K salt decomposed with AcOH gave 2.9 g. 8-hydroxy-5-nitroquinoline, yellow needles, m. 180° (from EtOH). Similarly, 8-hydroxy-5-nitrosoquinaldine gave 8-hydroxy-5-nitroquinaldine, silky yellow needles, m. 136° (from C6H6-petr. ether) (a small amount of 8-hydroxy-5,7-dinitroquinaldine, small yellow needles, m. above 300° was a byproduct). The following compounds were prepared by this general procedure: To 1 g. nitro compound in 300 mL. H2O and 0.9 g. KOH was added 1 mol. equivalent Br or iodine dissolved in KBr or KI, resp., and the whole stirred at room temperature 2 h. and acidified, giving 60-70% yield of the halogenated product (all derivatives recrystallized from EtOCH2CH2OH): 7-bromo-8-hydroxy-5-nitroquinoline (XI), red felted needles, m. 200°; 7-bromo-8-hydroxy-5-nitroquinaldine (XII), red plates, m. 265° (decomposition); and 8-hydroxy-7-iodo-5-nitroquinaldine (XIII), bright red plates, m. 244°. As above, with I, XI gave the amino compound (XIV), light brown needles, m. 184° (decomposition) (from EtOAc-petr. ether); XII gave the amino compound (XV), golden brown needles, m. 176° (decomposition); and XIII gave the amino compound (XVI), yellow needles, m. 162° (decomposition from Et2O-petr. ether). As above, with Na2Cr2O7 were prepared the following 5,8-quinones (all recrystallized from CHCl3-petr. ether): 7-bromoquinoline (from XIV), pale yellow needles, m. 182°; 7-bromoquinaldine (from XV), orange-yellow needles, m. 178°; 7-iodoquinoline (from XVI), unstable yellow-brown needles, m. 160° (decomposition); and 7-iodoquinaldine, yellow-brown needles, m. 160° (decomposition). 4-IC6H4NH2 (XVII) (42 g.), 70 g. dry glycerol, and 33 g. As2O5 heated to 120° 20 mL. concentrated H2SO4 added dropwise with stirring, and with the temperature kept at 120° the whole refluxed 4 h., 600 mL. H2O added, the mixture filtered, the filtrate made alk. with aqueous NH3, extracted with C6H6, the C6H6 extracts extracted with 6N HCl, the base liberated from the HCl extracts with NaOH, extracted with CHCl3 and the CHCl3 extracts concentrated and distilled gave 6-iodoquinoline (XVIII), b1 120° pale yellow prisms, m. 88° (from petr. ether). XVIII (1.5 g.), 4.5 mL. concentrated H2SO4, and 0.8 mL. concentrated HNO3 in 1 mL. concentrated H2SO4 heated 1 h. at 100° gave 1.5 g. 6-iodo-5-nitroquinoline, m. 163° (from C6H6). XVII (25 g.), 20 mL. concentrated HCl, and 20 mL. paraldehyde kept overnight, the whole refluxed 2 h., H2O added, the aqueous solution decanted from the resin (XIX), the XIX extracted twice with 2N HCl, the combined HCl solutions treated as above m the preparation of XVIII gave 5.9 g. 6-iodoquinaldine (XX), prisms, m. 112° (from petr. ether). As above XX gave 90% 6-iodo-5-nitroquinaldine (XXI), pale yellow needles, m. 146 ° (from EtOH). XXI (5 g.) and 25 g. PhNH2 heated 2 h. at 180°, AcONa solution added, the excess PhNH2 steam distilled, the residue extracted with C6H6, the C6H6 extracts percolated through Al2O3, and the C6H6 evaporated gave 6-anilino-5-nitroquinaldine, felted orange needles, m. 147-8° (from EtOH). XXI (2.5 g.), 7 g. reduced Fe, 20 mL. EtOH, and 5 drops concentrated HCl refluxed 2 h., the whole filtered, and the filtrate made alk. with aqueous NH3 gave 2 g. 5-amino-6-iodoquinaldine, golden plates, m. 206° (decomposition) (from C6H6-petr. ether). 8-Hydroxyquinoline (2 g.) in CHCl3 and 2 mol ethereal peroxyphthalic acid in Et2O kept overnight, the whole evaporated to dryness, and the residue triturated with aqueous NH3 gave 8-hydroxyquinoline N-oxide (XXII), golden yellow needles, m. 138°. XXII (3.2 g. in 400 mL. 0.2% NaOH and 5.1 g. iodine in KI gave 8-hydroxy-5(?)-iodoquinoline N-oxide, yellow needles, m. 169° (from C6H6). XXII (1.6 g.) in 10 mL. AcOH and 1 mL. concentrated HNO3 kept 1 h. at 20° gave a precipitate of the nitrate which, decomposed with KOH, yielded 8-hydroxy-5(?)-nitroquinoline N-oxide (XXIII), light brown powder, m. 217-18° (decomposition) (from alc.). XXIII and I as above gave the amine, orange-red needles, m. 213° (decomposition) (from C6H6). Quinoline-5,8-quinone (0.75 g.), 1.2 g. PhNH2, and 10 mL. EtOH refluxed 1 h. and the whole poured into dilute AcOH gave 6(7)-anilinoquinoline-5,8-quinone, scarlet needles, m. 213° (decomposition) (from C6H6petr. ether). 7-Bromoquinoline-5,8-quinone (0.1 g.), 0.053 g. PhNH2.HCl, 0.05 g. AcONa, and 5 mL. alc. refluxed 2 h., and the whole poured into H2O gave 0.1 g. 6-anilino-7-bromoquinoline-5,8-quinone, dark red prisms, m. 189° (decomposition). 8-Hydroxy-5-nitroquinoline (2 g.) in 20 mL. boiling EtOH with 2 mL. 36% HCHO and 2 mL. morpholine gave 2.3 g. 8-hydroxy-7-morpholinomethyl-5-nitroquinoline, yellow prisms (which rapidly discolor), m. 112° (decomposition).

From this literature《Quinoline-5,8-quinones》,we know some information about this compound(1127-45-3)Computed Properties of C9H7NO2, but this is not all information, there are many literatures related to this compound(1127-45-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Tian, Yulin; Jin, Jing; Wang, Xiaojian; Hu, Jinping; Xiao, Qiong; Zhou, Wanqi; Chen, Xiaoguang; Yin, Dali published an article about the compound: 1-(Bromomethyl)-4-ethylbenzene( cas:57825-30-6,SMILESS:CCC1=CC=C(CBr)C=C1 ).Recommanded Product: 57825-30-6. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:57825-30-6) through the article.

We have discovered a series of triazole/oxazole-containing 2-substituted 2-aminopropane-1,3-diol derivatives as potent and selective S1P1 agonists (prodrugs) based on pharmacophore-guided rational design. Most compounds showed high affinity and selectivity for S1P1 receptor. Compounds 19b, 19d and 19p displayed clear dose responsiveness in the lymphocyte reduction model when administered orally at doses of 0.3, 1.0, 3.0 mg/kg with reduced effect on heart rate. These three compounds were also identified to have favorable pharmacokinetic properties.

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Quinoxaline – Wikipedia,
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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Blue and white light electroluminescence in a multilayer OLED using a new aluminium complex, published in 2010-11-30, which mentions a compound: 1127-45-3, mainly applied to aluminum complex multilayer organic light emitting device electroluminescence property, Safety of 8-Hydroxyquinoline 1-oxide.

Synthesis, structure, optical absorption, emission and electroluminescence properties of a new blue emitting Al complex, namely, bis-(2-amino-8-hydroxyquinolinato), acetylacetonato Al(III) are reported. Multilayer OLED using the Al complex showed blue emission at 465 nm, maximum brightness of ∼425 cd/m2 and maximum current efficiency of 0·16 cd/A. Another multilayer OLED using the Al complex doped with phosphorescent Ir complex showed ‘white’ light emission, CIE coordinate (0·41, 0·35), maximum brightness of ∼970 cd/m2 and maximum current efficiency of 0·53 cd/A.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider