Category: quinoxaline

Application In Synthesis of 8-Hydroxyquinoline 1-oxide. 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 Oxidation of 1-naphthol and related phenols with hydrogen peroxide and potassium superoxide catalyzed by 5,10,15,20-tetraarylporphyrinatoiron(III) chlorides in different reaction conditions. Author is Chauhan, S. M. S.; Kalra, Bhanu; Mohapatra, P. P..

Reaction of 1-naphthol and related phenols with hydrogen peroxide catalyzed by 5,10,15,20-tetra(pentafluorophenyl)porphyrinatoiron(III) chloride gives quinones and oxidative coupling products, whereas the reaction of naphthols with hydrogen peroxide catalyzed by 5,10,15,20-tetramesitylporphyrinatoiron(III) chloride gives the above products along with quinone epoxides in moderate yields. The reaction of quinone with potassium superoxide catalyzed by Me12TPPFe(III)Cl and p-MeOTPPFe(III)Cl give higher yields of quinone epoxides than the reaction of quinone with hydrogen peroxide catalyzed by 5,10,15,20-tetraarylporphyrinatoiron(III) chlorides.

From this literature《Oxidation of 1-naphthol and related phenols with hydrogen peroxide and potassium superoxide catalyzed by 5,10,15,20-tetraarylporphyrinatoiron(III) chlorides in different reaction conditions》,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).

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 《Tracer studies on the extraction of metal ions. III. Extraction of manganese(II), iron(III), cobalt(II), copper(II), and zinc(II) with 8-hydroxyquinoline N-oxide》. Authors are Mikulski, J..The article about the compound:8-Hydroxyquinoline 1-oxidecas:1127-45-3,SMILESS:OC1=CC=CC2=CC=C[N+]([O-])=C12).Safety of 8-Hydroxyquinoline 1-oxide. Through the article, more information about this compound (cas:1127-45-3) is conveyed.

8-Hydroxyquinoline N-oxide extract less Mn(II), Fe(III), and Co(II) than does 8-hydroxyquinoline, and the extraction takes place in a lower pH range. Zn was not extracted at all. The tracers were 54Mn, 59Fe, 60Co, 64Cu, and 65Zn. Cf. CA 60, 11569a.

From this literature《Tracer studies on the extraction of metal ions. III. Extraction of manganese(II), iron(III), cobalt(II), copper(II), and zinc(II) with 8-hydroxyquinoline N-oxide》,we know some information about this compound(1127-45-3)Safety of 8-Hydroxyquinoline 1-oxide, but this is not all information, there are many literatures related to this compound(1127-45-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Electric Literature of F2H8NiO4. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Nuclear magnetic resonance study of some paramagnetic hydrated fluorides. Author is Easwaran, K. R. K.; Srinivasan, Ramaswami.

N.M.R. studies of proton and F nuclei are reported in a series of compounds MF2.4H2O, where M is Fe, Co, Ni, and Zn. The spectra of the 3 paramagnetic salts were different from those of the diamagnetic ZnF2.4H2O. Proton resonance studies of the paramagnetic members have shown marked changes in line width on cooling from room temperature to 90°K. The 19F resonance in the paramagnetic salts in polycrystalline from have shown large shifts which were temperature dependent. The results are discussed in terms of the hyperfine fields owing to the unpaired electrons of the paramagnetic ions.

From this literature《Nuclear magnetic resonance study of some paramagnetic hydrated fluorides》,we know some information about this compound(13940-83-5)Electric Literature of F2H8NiO4, but this is not all information, there are many literatures related to this compound(13940-83-5).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Pu, Ling-xiang; Xiao, Rong; Zhang, Yi-wen; Song, Hang published the article 《Process improvement on the synthesis of 5-(2-bromobutylacyl)-8-hydroxy quinolone》. Keywords: bromobutylacyl hydroxy quinolone synthesis.They researched the compound: 8-Hydroxyquinoline 1-oxide( cas:1127-45-3 ).HPLC of Formula: 1127-45-3. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1127-45-3) here.

5-(2-Bromobutylacyl)-8-hydroxy quinolone in total yield of 49% was synthesized by a four-step reaction of oxidation, acetylation, hydrolysis and Friedel-Crafts acylation from 8-hydroxy quinolone. The structure was confirmed by 1H NMR, 13C NMR and IR.

If you want to learn more about this compound(8-Hydroxyquinoline 1-oxide)HPLC of Formula: 1127-45-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(1127-45-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Computed Properties of C12H11NO. 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: (4-(Pyridin-4-yl)phenyl)methanol, is researched, Molecular C12H11NO, CAS is 217192-22-8, about In situ-prepared homogeneous supramolecular organic framework drug delivery systems (sof-DDSs): Overcoming cancer multidrug resistance and controlled release.

Water-soluble three-dimensional porous supramol. organic frameworks (SOFs) have been demonstrated as a new generation of homogeneous polycationic platforms for anti-cancer drug delivery. The new SOF drug delivery systems (sof-DDSs) can adsorb dianionic pemetrexed (PMX), a clin. used chemotherapeutic agent instantaneously upon dissolving in water, which is driven by both electrostatic attraction and hydrophobicity. The in situ-prepared PMX@SOFs are highly stable and can avoid important release of the drug during plasm circulation and overcome the multidrug resistance of human breast MCF-7/Adr cancer cells to enter the cancer cells. Acidic microenvironment of cancer cells promotes the release of the drug in cancer cells. Both in vitro and in vivo studies have revealed that sof-DDSs considerably improve the treatment efficacy of PMX, leading to 6-12-fold reduction of the IC50 values, as compared with that of PMX alone. The new drug delivery strategy omits the loading process required by most of reported nanoparticle-based delivery systems and thus holds promise for future development of low-cost drug delivery systems.

If you want to learn more about this compound((4-(Pyridin-4-yl)phenyl)methanol)Computed Properties of C12H11NO, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(217192-22-8).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

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 Heterocyclic N-oxides. V. Substitution reactions on 8-hydroxyquinoline 1-oxide, published in 1968, which mentions a compound: 1127-45-3, Name is 8-Hydroxyquinoline 1-oxide, Molecular C9H7NO2, Recommanded Product: 1127-45-3.

Nitration and halogenation of 8-hydroxyquinoline 1-oxide (I) having N-oxide and phenolic OH groups, each capable of orienting electrophilic substitution in the different rings, was studied with a view to knowing the relative directive influence of these groups and to screen the compounds obtained for bacteriostatic and fungistatic activity. Halogenation afforded under usual conditions products by substitution only in the benzene ring. Thus, 1.5 ml. SO2Cl2 in 10 ml. CHCl3 was added dropwise to a stirred solution of 0.8 g. I in 10 ml. CHCl3 at <5° to yield 0.92 g. 5,7-dichloro-8-hydroxyquinoline 1-oxide (II) as H2O-insoluble fraction (aqueous solution A), m. 203-4° (HOAc). Deoxygenation of II with PCl3 afforded 5,7-dichloro-8-hydroxyquinoline, m. 176°. The aqueous solution (A) on cooling yielded 0.07 g. 5-chloro-8-hydroxyquinoline 1-oxide, m. 169-70°. Similarly, bromination of 0.8 g. I in 10 ml. HOAc with 1 ml. Br in 10 ml. HOAc yielded 1.42 g. of the dibromo compound, m. 198-200° (HOAc), which on deoxygenation yielded 5,7-dibromo-8-hydroxyquinoline, m. 195°. Nitration of 0.8 g. I in 10 ml. HOAc with 2 ml. fuming HNO3 (d. 1.5) initially at room temperature and then 1 hr. at 70-80° (water-bath) yielded 0.8 g. 5,7-dinitro-8-hydroxyquinoline 1-oxide (III), m. 213-14° (HOAc). Nitration of 0.8 g. I in 10 ml. HOAc with 0.7 ml. concentrated HNO3 (d. 1.42) at <20° for 1 hr. yielded 0.75 g. 5-nitro-8-hydroxyquinoline 1-oxide (IV), m. 191-3° (EtOH). The structure of III and IV were established through deoxygenation and comparison with the known 5-nitro and 5,7-dinitro-8-hydroxyquinolines. The phenolic hydroxyl exerts greater influence than the N-oxide function. The usual 5,7-disubstituted derivatives of 8-hydroxyquinoline, 5,7-dihalo- or the 5,7-dinitro compounds were resistant to N-oxidation either by 30% H2O2-HOAc or BzO2H. If you want to learn more about this compound(8-Hydroxyquinoline 1-oxide)Recommanded Product: 1127-45-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(1127-45-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1-(Bromomethyl)-4-ethylbenzene, is researched, Molecular C9H11Br, CAS is 57825-30-6, about Design, synthesis and evaluation of 3-(imidazol-1-ylmethyl)indoles as antileishmanial agents. Part II, the main research direction is benzylimidazolylmethylindole preparation antileishmanial agent; indole benzylimidazolylmethyl preparation antileishmanial agent.Electric Literature of C9H11Br.

A new series of 1-benzyl-3-(imidazol-1-ylmethyl)indoles were synthesized according to a previous 3D-QSAR predictive model and assayed for their antiparasitic activity upon Leishmania mexicana promastigotes. The biol. results obtained for these twelve mols. showed an IC50 ranging from 2.3 to 32 μM and mainly illustrated the importance of the hydrophobic parameter in the para-position of the benzyl group. In order to improve the activities of these compounds and to check the potential influence of the electronic parameter on this particular position, a Craig diagram was used to select original electro-donating and lipophilic substituents. Synthesis and biol. evaluation of ten new compounds (IC50 between 2.5 and 5.4 μM) confirmed that only the hydrophobic field is essential for a high level of activity.

If you want to learn more about this compound(1-(Bromomethyl)-4-ethylbenzene)Electric Literature of C9H11Br, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(57825-30-6).

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 Influence of solvents on intramolecular hydrogen bonds with large proton polarizability, published in 1982-07-31, which mentions a compound: 1127-45-3, mainly applied to hydrogen bond intramol NMR; proton polarizability hydrogen bond NMR, Synthetic Route of C9H7NO2.

A large number of compounds with intramol. hydrogen bonds with great proton polarizability were studied by 1H NMR in solvents of various polarities. With the homoconjugated hydrogen bonds, small changes of the chem. shift of the hydrogen-bonded proton are observed with increasing polarity of the solvent, whereby the signal shifts toward lower field. This effect is explained by increasing removal of the counterions from the homoconjugated hydrogen bonds and thus, by decreasing induced dipole interaction of the counterions and the hydrogen bonds with great proton polarizability. In the case of heteroconjugated hydrogen bonds analogous but much greater shifts are observed They are explained by a shift of the OH···N ⇌ O-···H+N equilibrium to the right-hand side with increasing polarity of the solvent. With hydrogen bonds showing no great proton polarizability these effects do not occur.

If you want to learn more about this compound(8-Hydroxyquinoline 1-oxide)Synthetic Route of C9H7NO2, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(1127-45-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

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: 19777-66-3, is researched, Molecular C3H12Cl2N2, about Optically active derivatives of imidazolines. α-Adrenergic blocking properties, the main research direction is imidazoline stereoisomer preparation adrenergic blocker.SDS of cas: 19777-66-3.

The title compounds I (R and R1 = H, Me, or PhCH2; R2 = 1-naphthylmethyl, PhCH2, or 2,6-dichloroaniline) as salts were prepared from an optically active 1,2-diamine-2HCl and an imino ester HCl, and converted to a stable solid salt. I were evaluated for α-adrenergic activity on rabbit aortic strips. Compared to naphazoline or tolazoline, substitution of a Me or PhCH2 at the 4 position of the imidazoline ring resulted in moderate α-blocking activity with no apparent stereoselectivity with such substitution.

If you want to learn more about this compound((S)-Propane-1,2-diamine dihydrochloride)SDS of cas: 19777-66-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(19777-66-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Name: 8-Hydroxyquinoline 1-oxide. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about 8-Hydroxyquinolines are bactericidal against Mycobacterium tuberculosis. Author is Odingo, Joshua O.; Early, Julie V.; Smith, Jake; Johnson, James; Bailey, Mai A.; Files, Megan; Guzman, Junitta; Ollinger, Juliane; Korkegian, Aaron; Kumar, Anuradha; Ovechkina, Yulia; Parish, Tanya.

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. If you want to learn more about this compound(8-Hydroxyquinoline 1-oxide)Name: 8-Hydroxyquinoline 1-oxide, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(1127-45-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider