Category: 1127-45-3

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about Syntheses and electronic spectra of 2,2′-isopropylidenedi-8-quinolinol, its nickel(II), and copper(II) chelates, the main research direction is nickel isopropylidenediquinolinol complex; copper isopropylidenediquinolinol complex; quinolinol nickel copper complex.Synthetic Route of C9H7NO2.

The title ligand was prepared from 8-quinolinol N-oxide by a 4-step synthesis. Its Ni(II) and Cu(II) chelates were also prepared Square-coordination of the ligand to the metal was revealed by a comparison of the d-d bands between the chelates and quadridentate Schiff base chelates. Intra-ligand transition bands of the title chelates and the solvent effects on the frequency shifts were compared with those of the ligand, 8-hydroxy-1-methylquinolinium hydroxide, bis(8-quinolinolato)palladium(II), -copper(II), and -nickel(II).

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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 《8-Hydroxy-1-methoxyquinoline methosulfate》. Authors are Krasavin, I. A.; Dziomko, V. M.; Radin, Yu. P..The article about the compound:8-Hydroxyquinoline 1-oxidecas:1127-45-3,SMILESS:OC1=CC=CC2=CC=C[N+]([O-])=C12).Product Details of 1127-45-3. Through the article, more information about this compound (cas:1127-45-3) is conveyed.

The crude title compound, not described previously, m. 126-8° (decomposition) and is very soluble in water, soluble in alcs., and insoluble in nonpolar solvents. Reaction with nucleophilic compounds gives 2-substituted 8-hydroxyquinolines. A mixture of 48.3 g. powd. 8-hydroxyquinoline 1-oxide (m. 138.5-39°) (Phillips, et al., CA 51, 11349a; Murase and Demura, CA 58 3390b, recrystallized twice from water and C6H6) and 37.9 g. freshly distilled Me2SO4 is warmed on a water bath 2 hrs. with reflux. The mass is cooled and stirred until crystallization, 200 ml. dry Et2O is added, and the mixture stirred until all material is hardened. The solid is washed with 50-100 ml. Et2O in a mortar after filtration, washed on the filter with Et2O, and dried in a vacuum desiccator. Yield 77.6-9.3 g. hygroscopic material. Recrystallization of 20 g. from EtOH-Et2O gave 3.67 g., m. 143-4.5°.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about Direct, catalytic, and regioselective synthesis of 2-alkyl-, aryl-, and alkenyl-substituted N-heterocycles from N-oxides.Computed Properties of C9H7NO2.

A one-step transformation of heterocyclic N-oxides to 2-alkyl-, aryl-, and alkenyl-substituted N-heterocycles is described. The success of this broad-scope methodol. hinges on the combination of copper catalysis and activation by lithium fluoride or magnesium chloride. The utility of this method for the late-stage modification of complex N-heterocycles is exemplified by facile syntheses of new structural analogs of several antimalarial, antimicrobial, and fungicidal agents.

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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 《Spectrophotometric studies of iron(III)-8-quinolinol N-oxide complex》. Authors are Bhat, A. N.; Jain, B. D..The article about the compound:8-Hydroxyquinoline 1-oxidecas:1127-45-3,SMILESS:OC1=CC=CC2=CC=C[N+]([O-])=C12).Quality Control of 8-Hydroxyquinoline 1-oxide. Through the article, more information about this compound (cas:1127-45-3) is conveyed.

Spectrophotometric data at 30° from continuous variations and slope ratio methods show a 1:1 molar ratio of Fe to 8-quinolinol N-oxide in a pH range of 0.5-3.5, contrary to a 1:3 ratio reported by Murase (CA 49, 10786d). The complex was brownish green. Stability constant determination by the 2 methods gave log K = 3.28 and 3.63, resp. The absorption maximum was 510 mμ. In pH range 6.5-8.4, maximum was at 425-30 mμ, and in pH range 3.6-6.0, maximum were at 510 and 430 mμ; this indicates a mixture at pH 3.6-6.0.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

HPLC of Formula: 1127-45-3. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about 2,8-Dihydroxyquinoline based sensitive fluoroionophore towards Cu2+ ion. Author is He, Chunlian; Li, Cheng; Li, Zhiguang; Li, Huanyin; Xiang, Jiannan; Yan, Zhengli.

Novel water soluble quinoline derivatives 1a∼1d were synthesized from 8-hydroxyquinoline and the fluorescence of these compounds had been quenched by Cu2+ or Fe3+ in absolute water. The fluorescence of 1a was quenched by 93% with addition of 50 μM of Cu2+ in absolute water and 75% in the presence of 50 μM of Fe3+ with the quenching ratio (Cu2+:Fe3+) of 1:0.80, showing much higher sensitivity and selectivity of Cu2+ to Fe3+. The presence of some other metal ions such as K+, Ca2+, Zn2+, Al3+, Mn2+, Fe2+, Ba2+, Co2+, Ni+, Cr3+, Cd2+, Cu2+, Hg2+, Pb2+, Sn2+, Na+ and Mg2+ had little influence on the selectivity and sensitivity of Cu2+. The easily available 1a could be considered a potential fluorescence sensor for Cu2+.

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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 《Biochemical studies on quinoline derivatives. VII. Metabolic products of 8-quinolinol N-oxide》. Authors are Ito, Ryoji; Otaka, Hajime; Usui, Shigeru; Hashimoto, Yukichi.The article about the compound:8-Hydroxyquinoline 1-oxidecas:1127-45-3,SMILESS:OC1=CC=CC2=CC=C[N+]([O-])=C12).Application In Synthesis of 8-Hydroxyquinoline 1-oxide. Through the article, more information about this compound (cas:1127-45-3) is conveyed.

cf. CA 56, 13486h. Main metabolic products of 8-quinolinol N-oxide (I) found in the urine of injected rabbits were 8-hydroxy-2-quinolone (II) and 7,8-dihydroxy-2-quinolone. 8,x-dihydroxy-2-quinolone, a product of further metabolism of 8-hydroxy-4-quinolone, an alkylated derivative of quinoline, and a compound of unknown structure were also found: 8-Quinolinol (III), 7,8-dihydroxyquinoline (IV), IV N-oxide, 8-quinolylsulfuric acid (V), V N-oxide, and I were not present. All other metabolic products, except a part of II, occurred in urine as glucuronides or ethereal sulfates. Metabolic products were in accord with those of II, but very different from those of III. In vitro oxidation of I by quinoline dehydrogenase was very difficult, and oxidation products were not detected.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about Azo compounds from 8-hydroxyguinoline N-oxide and its analogs as a new class of organic reagents.Application In Synthesis of 8-Hydroxyquinoline 1-oxide.

Reagents for photometric and extraction-photometric determination of Co, Cu, Ni, Pd, Ag, and other metals were prepared by coupling benzenediazonium or its derivatives and 8-quinolinol N-oxide (I) and its derivatives Cu2+ was determined by extraction of its complex with the coupling product of diazotized picramic acid and I into CHCl3 from a pH 6-7 solution and measuring the absorbance. The same reagent was used for determining Pd phtometrically at pH 0.5-8. The complexes of metals other than Cu were not extractable.

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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: 8-Hydroxyquinoline 1-oxide( cas:1127-45-3 ) is researched.Formula: C9H7NO2.Nayak, Pabitra K.; Agarwal, Neeraj; Ali, Farman; Patankar, Meghan P.; Narasimhan, K. L.; Periasamy, N. published the article 《Blue and white light electroluminescence in a multilayer OLED using a new aluminium complex》 about this compound( cas:1127-45-3 ) in Journal of Chemical Sciences (Bangalore, India). Keywords: aluminum complex multilayer organic light emitting device electroluminescence property. Let’s learn more about this compound (cas:1127-45-3).

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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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Yang, Fengjuan; Zhang, Xiaowen; Li, Fengxi; Wang, Zhi; Wang, Lei published an article about the compound: 8-Hydroxyquinoline 1-oxide( cas:1127-45-3,SMILESS:OC1=CC=CC2=CC=C[N+]([O-])=C12 ).SDS of cas: 1127-45-3. 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:1127-45-3) through the article.

In this work, a lipase-glucose oxidase system was designed and proven to be an efficient system for the oxidation of N-heteroaromatic compounds and tertiary amines. This dual-enzyme system not only displayed environmental friendliness, but also demonstrated its huge potential in industrial applications.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about Reaction of 5-(2-hydroxy-3,5-dinitrophenylazo)-8-hydroxyquinoline N-oxide with copper(II).Application of 1127-45-3.

Taking as an example the color reaction between Cu(II) and 5-(2-hydroxy-3,5-dinitrophenylazo-8-hydroxyaquinoline N-oxide (I), the possibility of a new class of anal. reagents based on 8-hydroxyquinoline N-oxide azo compounds was studied. Significant differences were observed when using this class of reagents in complex formation compared to 8-hydroxyquinoline azo derivatives As a result of complex formation I is converted from the azoid form to the quinone-hydrazone form. I reacts with Cu(II) to form a violet-complex in aqueous media and pH 5.9-6.5 with λ maximum at 530 nm. The molar absorptivity of the complex is (9.5 ± 0.1) × 103. The same complex forms in 50% aqueous Me2CO medium at pH 5.5-6.0; λ maximum is at 530 nm with a molar absorptivity of (1.57 ± 0.03) x 104. A rapid extraction-spectrophotometric procedure was developed for Cu determination in Zn alloys and steel by using I. Beer’s law is obeyed up to 1.5 μg Cu/mL. Zn 200; Mn, Ag, and Pb 100; Co 25; and Ni 20; Cl- and NO3- 1000; SO42- 800; and F- 125-fold excess do not interfere; Al, Fe(III), and Cr(III) do. Al and Fe interference can be masked by addition of NaF.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider