Tag: M.W:100-200

Reference of 2213-63-0, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 2213-63-0, 2,3-Dichloroquinoxaline, introducing its new discovery.

REGIOSELECTIVE SYNTHESIS OF 2,6-DICHLOROQUINOXALINE AND 2-CHLORO-6-IODOQUINOXALINE

Facile regioselective synthesis of 2,6-dichloroquinoxaline and 2-chloro-6-iodoquinoxaline is described.Electrophilic substitution reaction of 2(1H)-quinoxalinone with chloride and iodide ion in 95percent sulfuric acid occurred at 6-position exclusively.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Reference of 2213-63-0. In my other articles, you can also check out more blogs about 2213-63-0

Reference£º
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1527 | ChemSpider

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Recommanded Product: 2213-63-0, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 2213-63-0, name is 2,3-Dichloroquinoxaline. In an article£¬Which mentioned a new discovery about 2213-63-0

Synthesis of some new pyrimido[2?,1?:2,3]thiazolo[4,5-b]quinoxaline derivatives as anti-inflammatory and analgesic agents

Treatment of 6-aminothiouracil (1) with 2,3-dichloroquinoxaline (2) in ethanol/TEA afforded 6-amino-2-(3-chloroquinoxalin-2-ylthio)pyrimidin-4(3H)-one (3), which was refluxed in DMF to give 2-aminopyrimido[2?,1?:2,3]thiazolo[4,5-b]quinoxaline-4-one (4). Compound 4 was utilized as a key intermediate for the synthesis of a new pyrimido[2?,1?:2,3]thiazolo[4,5-b]quinoxaline derivatives 5-14 via the reaction with 2-chlorobenzaldehyde, 2-chlorocyclohex-1-enecarbaldehyde, 2-chlorobenzoic acid, 2,4-dichlorobenzoic acid, 5-chloro-3-methyl-1-phenyl-1H-pyrazole-4-carbaldehyde, 2-chloro-4,6-dimethylnicotinonitrile, alpha,beta-unsaturated ketones and isonicotinaldehyde, respectively. The chemical structures of the newly synthesized compounds were characterized by IR, NMR and mass spectral analysis. These compounds were also screened for their analgesic and anti-inflammatory activities. Some of these compounds (3, 4, 9, 10 and 12-14) exhibited promising activities.

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Reference£º
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1234 | ChemSpider

Related Products of 6344-72-5, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.6344-72-5, Name is 6-Methylquinoxaline, molecular formula is C9H8N2. In a Patent£¬once mentioned of 6344-72-5

Heterocyclic derivatives for the treatment of diabetes and other diseases

The present invention relates to certain substituted heterocycles of Formula (I) which are useful in the treatment of diseases related to lipid and carbohydrate metabolism, such as type 2 diabetes, adipocyte differentiation, uncontrolled proliferation, such as lymphoma, Hodgkin’s Disease, leukemia, breast cancer, prostate cancer or cancers in general; and inflammation, such as osteoarthritis, rheumatoid arthritis, Crohn’s Disease or Inflammatory Bowel Disease.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N6 | ChemSpider

Related Products of 6925-00-4, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.6925-00-4, Name is Quinoxaline-6-carboxylic acid, molecular formula is C9H6N2O2. In a Article£¬once mentioned of 6925-00-4

Palladium-Catalyzed Decarbonylative Difluoromethylation of Acid Chlorides at Room Temperature

Methods for the direct synthesis of difluoromethylated arenes are sparse, despite the importance of the difluoromethyl group in medical, agro-, and materials chemistry. A palladium-catalyzed decarbonylative cross-coupling reaction of acid chlorides with a difluoromethyl zinc reagent is achieved to access difluoromethylated compounds. The transformation proceeds at room temperature and shows broad functional group tolerance, thus providing a general and efficient method for decarbonylative difluoromethylation of a wide range of aromatic carboxylic acids.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N812 | ChemSpider

Electric Literature of 2213-63-0, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.2213-63-0, Name is 2,3-Dichloroquinoxaline, molecular formula is C8H4Cl2N2. In a Article£¬once mentioned of 2213-63-0

BRIDGEHEAD NITROGEN HETEROCYCLES. PART III. SYNTHESIS OF FUSED HETEROCYCLES FROM 3-(2,4-DICHLOROPHENYL)-5-MERCAPTO-1,2,4-s-TRIAZOLES

The condensation reaction of 3-(2,4-dichlorophenyl)-5-mercapto-1,2,4-s-triazole with chloroacetic acid, aromatic aldehydes, oxalyl chloride, dimethyl acetylenedicarboxylate, 1,2-diaminocompounds and 1,2-diketones leading to the formation of fused heterocycles was carried out.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1336 | ChemSpider

18514-76-6, Name is 5-Nitroquinoxaline, belongs to quinoxaline compound, is a common compound. Safety of 5-NitroquinoxalineIn an article, once mentioned the new application about 18514-76-6.

Pd(II)/Bu4NBr/DMSO catalytic system for practical synthesis of indoles and pyrroles from imines through aerobic dehydrogenative cyclization

N-Aryl- and N-allylimines derived typically from substituted acetophenones undergo palladium(II)-catalyzed dehydrogenative cyclization reactions in the presence of tetrabutylammonium bromide and molecular oxygen in DMSO to afford indole and pyrrole derivatives, respectively, in moderate to good yields. The reactions are operationally simple and can be readily performed on multigram scales (up to 55 mmol).

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N914 | ChemSpider

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, COA of Formula: C8H5N3O2, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 6639-87-8, Name is 6-Nitroquinoxaline, molecular formula is C8H5N3O2

Electroreduction and acid-base properties of dipyrrolylquinoxalines

The electroreduction and acid-base properties of dipyrrolylquinoxalines of the form H2DPQ, H2DPQ(NO2), and H 2DPQ(NO2)2 were investigated in benzonitrile (PhCN) containing 0.1 M tetra-n-butylammonium perchlorate (TBAP). This study focuses on elucidating the complete electrochemistry, spectroelectrochemistry, and acid-base properties of H2DPQ(NO2)n (n = 0, 1, or 2) in PhCN before and after the addition of trifluoroacetic acid (TFA), tetra-n-butylammonium hydroxide (TBAOH), tetra-n-butylammonium fluoride (TBAF), or tetra-n-butylammonium acetate (TBAOAc) to solution. Electrochemical and spectroelectrochemical data provide support for the formation of a monodeprotonated anion after disproportionation of a dipyrrolylquinoxaline radical anion produced initially. The generated monoanion is then further reduced in two reversible one-electron-transfer steps at more negative potentials in the case of H2DPQ(NO2) and H 2DPQ(NO2)2. Electrochemically monitored titrations of H2DPQ(NO2)n with OH-, F-, or OAc- (in the form of TBA+X- salts) give rise to the same monodeprotonated H2DPQ(NO 2)n produced during electroreduction in PhCN. This latter anion can then be reduced in two additional one-electron-transfer steps in the case of H2DPQ(NO2) and H2DPQ(NO 2)2. Spectroscopically monitored titrations of H 2DPQ(NO2)n with X- show a 1:2 stoichiometry and provide evidence for the production of both [H 2DPQ(NO2)n]- and XHX-. The spectroscopically measured equilibrium constants range from log beta2 = 5.3 for the reaction of H2DPQ with TBAOAc to log beta2 = 8.8 for the reaction of H2DPQ(NO 2)2 with TBAOH. These results are consistent with a combined deprotonation and anion binding process. Equilibrium constants for the addition of one H+ to each quinoxaline nitrogen of H2DPQ, H2DPQ(NO2), and H2DPQ(NO2) 2 in PhCN containing 0.1 M TBAP were also determined via electrochemical and spectroscopic means; this gave rise to log beta2 values ranging from 0.7 to 4.6, depending upon the number of nitro substituents present on the H2DPQ core. The redox behavior of the H2DPQ(NO2)n compounds of the present study were further analyzed through comparisons with simple quinoxalines that lack the two linked pyrrole groups, i.e., Q(NO2)n where n = 0, 1, or 2. It is concluded that the pyrrolic substituents play a critical role in regulating the electrochemical and spectroscopic features of DPQs.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. COA of Formula: C8H5N3O2, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 6639-87-8, in my other articles.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N948 | ChemSpider

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Product Details of 2213-63-0, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 2213-63-0, name is 2,3-Dichloroquinoxaline. In an article£¬Which mentioned a new discovery about 2213-63-0

Alkynyl- and Dialkynyl-quinoxalines. Synthesis of Condensed Quinoxalines

Condensation of 2-chloro- and 2,3-dichloroquinoxalines with alk-1-ynes in the presence of bis(triphenylphosphine)palladium(II) dichloride and copper(I) iodide gives mono- and di-alkynylquinoxalines.Addition of amines to these products gives stable enamines; hydration gives 2′-oxoalkyl compounds which exist predominantly in the intramolecularly hydrogen-bonded enol form.Condensation of the alkynylquinoxalines with diethyl sodiomalonate, and related compounds, yields pyrido<1,2-a>quinoxalin-4-one derivatives. 2-Alkynyl-3-chloroquinoxalines are intermediates for convenient syntheses of pyrrolo<2,3-b>quinoxalines.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1251 | ChemSpider

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Product Details of 2213-63-0, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 2213-63-0, Name is 2,3-Dichloroquinoxaline, molecular formula is C8H4Cl2N2

Organic electroluminescent material and device (by machine translation)

The present invention provides a novel organic electroluminescent material and an organic electroluminescent device according to the present invention, wherein the organic electroluminescent material of the present invention (1) is, represented by, Ar, L, R the general formula (denoted by general formula I). 1 -R5 The meaning is shown, n, m, p in the specification in. the specification. (by machine translation)

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1136 | ChemSpider

Electric Literature of 1448-87-9, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1448-87-9, Name is 2-Chloroquinoxaline, molecular formula is C8H5ClN2. In a Article£¬once mentioned of 1448-87-9

Organocatalyzed, Photoredox Heteroarylation of 2-Trifluoroboratochromanones via C-H Functionalization

Heteroarylation via C-H functionalization has been synthetically challenging, but such transformations represent an atom-economical and highly convergent route toward complex molecules. Reported herein is a photoredox-catalyzed coupling between 2-trifluoroborato-4-chromanones and various heteroarenes through a Minisci pathway. Mesitylacridinium perchlorate, an organic photocatalyst, proved to be a better photocatalyst than transition-metal counterparts for such transformations. To highlight the utility of this approach, a library of unprecedented heteroaryl-substituted chromanones was generated that was composed of numerous, specifically substituted molecules containing a broad range of functional groups.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N627 | ChemSpider