Tag: M.W:100-200

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).Category: quinoxaline. 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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Application of 1127-45-3. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about Behavior of N-oxide derivatives in atmospheric pressure ionization mass spectrometry. Author is Ibrahim, Hany; Couderc, Francois; Perio, Pierre; Collin, Fabrice; Nepveu, Francoise.

RATIONALE : Indolone-N-oxide derivatives possess interesting biol. properties. The anal. of these compounds using mass spectrometry (MS) may lead to interference or under-estimation due to the tendency of the N-oxides to lose oxygen. All the previous works focused only on the temperature of the heated parts (vaporizer and ion-transfer tube) of the mass spectrometer without investigating other parameters. This work is extended to the investigation of other parameters. METHODS : The behavior of N-oxides during atm. pressure chem. ionization (APCI) and electrospray ionization (ESI) has been investigated using MSn ion trap mass spectrometry. Different parameters were investigated to clarify the factors implicated in the deoxygenation process. The investigated parameters were vaporizer temperature (APCI), ion-transfer tube temperature, solvent type, and the flow rates of the sheath gas, auxiliary gas, sweep gas and mobile phase. RESULTS : The deoxygenation increased when the vaporizer temperature increased. The extent of the ‘thermally’ induced deoxygenation was inversely proportional to the ion-transfer tube temperature and auxiliary gas flow rate and in direct proportion to the mobile phase flow rate. Deoxygenation was not detected under MS/MS fragmentation and hence it is a non-collision-induced dissociation N-Oxides have the tendency to form abundant ‘non-classical’ dimers under ESI, which fragment via dehydration rather than giving their corresponding monomer. CONCLUSIONS : Deoxygenation is not solely a ‘classical’ thermal process but it is a thermal process that is solvent-mediated in the source. Deoxygenation was maximal with an APCI source while dimerization was predominant with an ESI source. Therefore, attention should be paid to these mol. changes in the mass spectrometer as well as to the choice of the ionization mode for N-oxides. Copyright © 2013 John Wiley & Sons, Ltd.

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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Synthesis of 2-Alkenylquinoline by Reductive Olefination of Quinoline N-Oxide under Metal-Free Conditions, published in 2016-04-15, which mentions a compound: 1127-45-3, Name is 8-Hydroxyquinoline 1-oxide, Molecular C9H7NO2, Name: 8-Hydroxyquinoline 1-oxide.

Synthesis of 2-alkenylquinoline by reductive olefination of quinoline N-oxide under metal-free conditions is disclosed. Practically, the reaction could be performed with quinoline as starting material via a one-pot, two-step process. A possible mechanism is proposed that involves a sequential 1,3-dipolar cycloaddition and acid-assisted ring opening followed by a dehydration process.

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Reference:
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 Synthesis and antifungal activity of 1-(1H-1,2,4-triazole-1-yl)-2-(2,4-difluorophenyl)-3-(N-butyl-N-substituted benzylamino)-2-propanol, published in 2009-09-20, which mentions a compound: 57825-30-6, mainly applied to triazole difluorophenyl butylbenzylamino propanol preparation antifungal agent, Application of 57825-30-6.

To study the antifungal activity of triazole alcs. by introducing N-Bu and substituted benzyl as side chain, fourteen title compounds were synthesized and characterized by 1H NMR, IR, and LC-MS. The MICs of the compounds were determined by in vitro test using 8 clin. pathogenic fungi. The title compounds exhibited potent antifungal activities against nearly all fungi tested (except for Aspergillus fumigatus), especially for the deep infection ones. Three compounds showed a 16-fold activity (with a MIC80 value of 0.015 6 μg/mL) as that of fluconazole against Microsporum gypseum. Two compounds showed a 128-fold activity (with a MIC80 value of 0.003 9 μg/mL) as that of fluconazole against Candida albicans, and their activities were higher than those of other pos. controls.

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Reference:
Quinoxaline – Wikipedia,
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Lee, Yoon-Suk; Park, Sun Min; Kim, Hwan Mook; Park, Song-Kyu; Lee, Kiho; Lee, Chang Woo; Kim, Byeang Hyean published an article about the compound: 1-(Bromomethyl)-4-ethylbenzene( cas:57825-30-6,SMILESS:CCC1=CC=C(CBr)C=C1 ).Formula: C9H11Br. 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 describe (i) a simple method for the synthesis of C5-modified nucleosides, e.g. I, from 5-iodo-2′-deoxyuridine and (ii) their activity against six types of human cancer cell lines (HCT15, MM231, NCI-H23, NUGC-3, PC-3, ACHN). We generated nitrile oxides in situ from oximes using a com. bleaching agent; their cycloaddition with 5-ethynyl-2′-deoxyuridine yielded isoxazole derivatives possessing activity against the cancer cell lines. We synthesized several azides from benzylic bromides and their click reactions with 5-ethynyl-2′-deoxyuridine provided triazole derivatives

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Quinoxaline – Wikipedia,
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Recommanded Product: 8-Hydroxyquinoline 1-oxide. 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: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about Theoretical investigation of the second and third order nonlinear optical properties of some fused heterocyclic aromatic compounds. Author is Bader, Mamoun M..

The authors report herein the results of coupled perturbed Hartree-Fock (CPHF) ab initio extended basis set calculations on the geometric structures, dipole moments, static 1st-order (α), 2nd-order (β), and 3rd-order polarizabilities (γ) of fused heterocyclic aromatic compounds based on quinoline. The effects of the presence/absence of the heteroatom as well as the introduction of other substituents at various positions in the ring system on these mol. properties are described. The effect of the presence of N-oxide is also examined Suggestions for the design of heterocyclic systems with enhanced polarizabilities are made.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Kim, Dooseop; Kowalchick, Jennifer E.; Brockunier, Linda L.; Parmee, Emma R.; Eiermann, George J.; Fisher, Michael H.; He, Huaibing; Leiting, Barbara; Lyons, Kathryn; Scapin, Giovanna; Patel, Sangita B.; Petrov, Aleksandr; Pryor, KellyAnn D.; Roy, Ranabir Sinha; Wu, Joseph K.; Zhang, Xiaoping; Wyvratt, Matthew J.; Zhang, Bei B.; Zhu, Lan; Thornberry, Nancy A.; Weber, Ann E. published an article about the compound: (S)-Propane-1,2-diamine dihydrochloride( cas:19777-66-3,SMILESS:C[C@H](N)CN.[H]Cl.[H]Cl ).Related Products of 19777-66-3. 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:19777-66-3) through the article.

A series of β-aminoamides bearing triazolopiperazines have been discovered as potent, selective, and orally active dipeptidyl peptidase IV (DPP-4) inhibitors by extensive structure-activity relationship (SAR) studies around the triazolopiperazine moiety. Among these, compound (I) with excellent in vitro potency (IC50 = 4.3 nM) against DPP-4, high selectivity over other enzymes, and good pharmacokinetic profiles exhibited pronounced in vivo efficacy in an oral glucose tolerance test (OGTT) in lean mice. On the basis of these properties, compound I has been profiled in detail. Further refinement of the triazolopiperazines resulted in the discovery of a series of extremely potent compounds with subnanomolar activity against DPP-4, i.e., 4-fluorobenzyl-substituted compound (II), which is notable for its superior potency (IC50 = 0.18 nM). X-ray crystal structure determination of compounds I and II in complex with DPP-4 enzyme revealed that (R)-stereochem. at the 8-position of triazolopiperazines is strongly preferred over (S) with respect to DPP-4 inhibition.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

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.Ishikawa, Yuki; Miyamoto, Keiko; Horn, Ernst researched the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5 ).Related Products of 13940-83-5.They published the article 《Crystal structure of μ3-fluoro-tri-μ2-fluoro-tris(tetramethylethylene-diamine nickel(II)) fluoride trihydrate, [Ni3(tmen)3F5]+·F-·3H2O, C18H54F6N6Ni3O3》 about this compound( cas:13940-83-5 ) in Zeitschrift fuer Kristallographie – New Crystal Structures. Keywords: crystal structure nickel tetramethylethylenediamine fluoro bridged complex fluoride trihydrate; mol structure nickel tetramethylethylenediamine fluoro bridged complex fluoride trihydrate. We’ll tell you more about this compound (cas:13940-83-5).

The crystal structure of the title compound is herein given. The title compound was synthesized by a reaction of nickel difluoride tetrahydrate and N,N,N’,N’-tetramethylethylenediamine. The title compound is a fluoride bridged trinuclear complex. Crystallog. data are given.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

COA of Formula: C9H7NO2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about Chemiluminescent system of 8-hydroxyquinoline N-oxide-cobalt(II)-hydrogen peroxide. Author is Wang, Lun; Zhu, Changqing; Wu, Jialiang; Tong, Hongwu; Rao, Congshu; Zhang, Sujun.

8-Hydroxyquinoline N-oxide, synthesized in authors’ laboratory, is used as an energy receptor in Co(II)-H2O2 system and high intensity chemiluminescence of the system is observed A method for the measurement of trace Co is proposed. The detection limit and the relative standard deviation are 8.0 × 10-6 mg/mL and 3.2%, resp. Trace Co in copper ore, pig-liver, and shrimps is determined with satisfactory results. The possible mechanism of the chemiluminescence system is discussed.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

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 Manganese-catalysed benzylic C(sp3)-H amination for late-stage functionalization, published in 2018-06-30, which mentions a compound: 57825-30-6, mainly applied to regioselective benzylic amination manganese perchlorophthalocyanine catalyst, Electric Literature of C9H11Br.

Reactions that directly install nitrogen into C-H bonds of complex mols. are significant because of their potential to change the chem. and biol. properties of a given compound Although selective intramol. C-H amination reactions are known, achieving high levels of reactivity while maintaining excellent site selectivity and functional-group tolerance remains a challenge for intermol. C-H amination. Here, we report a manganese perchlorophthalocyanine catalyst [MnIII(ClPc)] for intermol. benzylic C-H amination of bioactive mols. and natural products that proceeds with unprecedented levels of reactivity and site selectivity. In the presence of a Bronsted or Lewis acid, the [MnIII(ClPc)]-catalyzed C-H amination demonstrates unique tolerance for tertiary amine, pyridine and benzimidazole functionalities. Mechanistic studies suggest that C-H amination likely proceeds through an electrophilic metallonitrene intermediate via a stepwise pathway where C-H cleavage is the rate-determining step of the reaction. Collectively, these mechanistic features contrast with previous base-metal-catalyzed C-H aminations and provide new opportunities for tunable selectivities.

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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider