Tag: M.W:100-200

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1448-87-9, name is 2-Chloroquinoxaline, introducing its new discovery. COA of Formula: C8H5ClN2

Kinetics of the reaction of 2-chloro-quinoxaline with hydroxide ion in ACN-H2O and DMSO-H2O binary solvent mixtures

The kinetics of alkaline hydrolysis of 2-chloroquinoxaline (QCl) with hydroxide ion was investigated spectrophotometrically at different percentages of aqueous-organic solvent mixtures with acetonitrile (10-60% v/v) and with dimethylesulphoxide (10-80%) over the temperature range from 25 to 45 C. The reaction was performed under pseudo first order conditions with respect to 2-chloroquinoxaline (QCl). An increase in the percentage of organic solvent (v/v) has different effects on the reaction rate constants, presumably due to hydrogen bond donor and acceptor differences of the media and other solvatochromic parameters. The data were discussed in terms of the Kamelt-Taft parameter and ET(30). A nonlinear relation between the logarithm of the rate constant and reciprocal of the dielectric constant suggests the presence of selective solvation by the polar water molecules. Activation parameters deltaH#, deltaS# and deltaG# were determined and discussed. Springer Science+Business Media, LLC 2011.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N580 | ChemSpider

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 80636-30-2, name is 3,3-Dimethyl-3,4-dihydroquinoxalin-2(1H)-one, introducing its new discovery. Application In Synthesis of 3,3-Dimethyl-3,4-dihydroquinoxalin-2(1H)-one

Efficient synthesis of useful heterocycles via transition metal-catalyzed cascade processes

This paper reports our recent results from synthesis of some useful heterocycles, for example oxazolidinones, indoles, and quinoxalinones, by transition metal-catalyzed cascade processes. The scope and limitations of these procedures and the reaction mechanism for formation of the heterocycles are also discussed.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N989 | ChemSpider

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. HPLC of Formula: C8H5FN2O, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 55687-23-5, name is 6-Fluoroquinoxalin-2(1H)-one. In an article£¬Which mentioned a new discovery about 55687-23-5

Convenient synthetic method for 3-(3-substituted indol-2-yl)quinoxalin-2- ones as VEGF inhibitor

It has already been reported that 3-(indol-2-yl)quinoxalin-2-ones 1)? have a potent inhibitory effect on the growth of tumor cells based on anti-angiogenesis activity. We have also carried out a structure-activity relationship (SAR) study of 3-(indol-2-yl)quinoxalin-2-ones, which showed a potent inhibitory activity toward the vascular endothelial growth factor (VEGF)-induced proliferation of human mesangial cells and the VEGF-induced auto-phosphorylation of human umbilical vein endothelial cells.2) Moreover, one of these compounds has a potent medicinal effect based on anti-angiogenic action, by oral administration2) (Chart 1, 9). However, since the existing synthetic methods1) for the preparation of 3-(indol-2-yl)quinoxalin-2-ones consist of multiple steps some of which require strict anhydrous conditions, a convenient and simple synthetic method in place of the existing method is desirable. As a result of the investigations into the synthetic procedures, 3-(3-substituted indol-2-yl)quinoxalin-2-ones can be easily prepared by the condensation of 3-substituted indoles with quinoxalin-2-ones in the presence of trifluoroacetic acid (TFA). Herein, we report the examination of these reaction conditions and the application of this new synthetic method to the synthesis of the derivatives as VEGF inhibitors.

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 55687-23-5, help many people in the next few years.HPLC of Formula: C8H5FN2O

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N434 | ChemSpider

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. category: quinoxaline, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 32601-86-8, name is 2-Chloro-3-methylquinoxaline. In an article£¬Which mentioned a new discovery about 32601-86-8

Synthesis and antimicrobial activity of some new quinoxaline derivatives

Quinoxaline derivatives have several pharmaceutical applications. Quinoxaline derivatives are benzoheterocycles, quinoxalin-2-ones and quinoxaline-2, 3-diones. Some of quinoxaline compounds are synthesized and characterized such as 8-bromo-2-methoxyquinoxaline, tert-butyl 1-(2-methoxyquinoxalin-8-yl) pyrrolidin-3-ylcarbamate, tertbutyl (R)-1-(2-methoxyquinoxalin-8-yl) pyrrolidin-3-ylcarbamate, tert-butyl (S)-1-(2-methoxyquinoxalin-8-yl)pyrrolidin-3-ylcarbamate, 1-(2-methoxyquinoxalin-8-yl) pyrrolidin-3-amine, (R)-1-(2-methoxyquinoxalin-8-yl)pyrrolidin-3-amine, (S)-1-(2-methoxyquinoxalin-8-yl)pyrrolidin-3-amine. Biological activity results were statisfactory.

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 32601-86-8, help many people in the next few years.category: quinoxaline

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1047 | ChemSpider

Electric Literature 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 Patent£¬once mentioned of 6925-00-4

NOVEL ANTIFUNGAL AGENT COMPRISING HETEROCYCLIC COMPOUND

The present invention provides an antifungal agent represented by the formula: [wherein A1 represents a 3-pyridyl group which may have a substituent, a quinolyl group which may have a substituent, or the like; X1 represents a group represented by the formula -NH-C(=O)-, a group represented by the formula -C(=O)-NH-, or the like; E represents a furyl group, a thienyl group, a pyrrolyl group, a phenyl group, a pyridyl group, a tetrazolyl group, a thiazolyl group or a pyrazolyl group; with the proviso that A1 may have 1 to 3 substituents, and E has one or two substituents].

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N788 | ChemSpider

2213-63-0, Name is 2,3-Dichloroquinoxaline, belongs to quinoxaline compound, is a common compound. Recommanded Product: 2213-63-0In an article, once mentioned the new application about 2213-63-0.

Synthesis, characterization and in vitro antibacterial activity of new steroidal 5-en-3-oxazolo and thiazoloquinoxaline

Steriodal heterocyclic systems namely cholest-5-en-3-oxazolo and thiazoloquinoxaline have been synthesized via the reaction of cholest-5-en-3-one semicarbazone/thiosemicarbazone with 2,3-dichloroquinoxaline at 80 C in high yield. Cholest-5-en-3-one semicarbazone is obtained by the condensation of cholest-5-en-3-one with semicarbazide in the presence of AcONa in ethanol and cholest-5-en-one thiosemicarbazone is obtained by the condensation of cholest-5-en-3-one with thiosemicarbazide in ethanol in the presence of a few drops of HCl. The structures of these compounds were evident by elemental analysis, IR, 1H NMR and FAB mass spectral analysis. These synthesized compounds were investigated for antibacterial activity first by the disk-diffusion assay against two Gram-positive and two Gram-negative bacteria and then the minimum inhibitory concentration (MIC) of these compounds were determined and the results were compared with the standard drug Amoxicillin. The results showed that these compounds oxazolo/thiazoloquinoxaline are better antibacterial agents as compared to the standard drug Amoxicillin.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1397 | ChemSpider

Related Products of 1448-87-9, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 1448-87-9, molcular formula is C8H5ClN2, introducing its new discovery.

Photoredox-Catalyzed Decarboxylative C-H Acylation of Heteroarenes

A mild, environmentally friendly, and regioselective acylation of heterocycles with inexpensive carboxylic acids is reported via photoredox catalysis. The strategy is highlighted with good functional group tolerance and substrate scope which could rapidly realize the acylation of various heterocyclic compounds.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 1448-87-9 is helpful to your research. Related Products of 1448-87-9

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N603 | ChemSpider

1448-87-9, Name is 2-Chloroquinoxaline, belongs to quinoxaline compound, is a common compound. Formula: C8H5ClN2In an article, once mentioned the new application about 1448-87-9.

A containing quinoxaline of chalcone derivatives, preparation method and application thereof (by machine translation)

The invention discloses a containing quinoxaline of chalcone derivatives, preparation method and application thereof, its general formula is shown as follows, wherein: X is 2 – O or 4 – O, R1 Is phenyl and containing 1 one or more substituted phenyl (2 – 6 position of the halogen, 2 – 6 position of the C1 – C6 alkyl, 2 – 6 bit C1 – C6 alkoxy, 2 – 6 position of the nitro, 2 – 6 position of amino, 2 – 6 position of the trifluoromethyl), heterocyclic group; R2 In order to of the quinoxaline in the structure 5, 6, 7 or 8 position containing more than one hydrogen atom, C1 – C6 alkoxy, nitro, C1 – C6 alkyl, trifluoromethyl or a halogen atom. The invention can restrain the rice leaf spot bacteria, citrus ulcer germs and tobacco wilt bacteria in, raw materials are easy, mild reaction conditions, after treatment is simple, high yield. (by machine translation)

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N471 | ChemSpider

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Recommanded Product: 15804-19-0, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 15804-19-0, Name is Quinoxaline-2,3(1H,4H)-dione, molecular formula is C8H6N2O2

Design and synthesis of new quinoxaline derivatives as anticancer agents and apoptotic inducers

The quinoxaline scaffold is a promising platform for the discovery of active chemotherapeutic agents. Three series of quinoxaline derivatives were synthesized and biologically evaluated against three tumor cell lines (HCT116 human colon carcinoma, HepG2, liver hepatocellular carcinoma and MCF-7, human breast adenocarcinoma cell line), in addition to VEGFR-2 enzyme inhibition activity. Compounds VIId, VIIIa, VIIIc, VIIIe and XVa exhibited promising activity against the tested cell lines and weak activity against VEGFR-2. Compound VIIIc induced a significant disruption in the cell cycle profile and cell cycle arrest at the G2/M phase boundary. In further assays, the cytotoxic effect of the highly active compounds was determined using a normal Caucasian fibroblast-like fetal lung cell line (WI-38). Compound VIIIc could be considered as a lead compound that merits further optimization and development as an anti-cancer and an apoptotic inducing candidate against the HCT116 cell line.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N315 | ChemSpider

Electric Literature 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 Patent, and a compound is mentioned, 2213-63-0, 2,3-Dichloroquinoxaline, introducing its new discovery.

HETERO-CYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME

The specification is represented by said formula 1 heterocyclic compound and including an electron transporting layer are disclosed. (by machine translation)

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

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1178 | ChemSpider