Month: May 2021

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Quality Control of 6-Methylquinoxaline, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 6344-72-5, name is 6-Methylquinoxaline. In an article，Which mentioned a new discovery about 6344-72-5

(5Z)-5-(6-QUINOXALINYLMETHYLIDENE)-2-[(2,4,6-TRICHLOROPHENYL)AMINO]-1,3-THIAZOL-4(5H)-ONE

Invented is the compound (5Z)-5-(6-quinoxalinylmethylidene)-2-[(2,4,6-trichlorophenyl)amino]-1 ,3-thiazol-4(5H)-one, and pharmaceutically acceptable salts, hydrates, solvates and pro-drugs thereof. Also invented are pharmaceutical compositions containg this compound, methods of preparing this compound and pharmaceutically acceptable salts, hydrates, solvates and pro-drugs thereof. Also invented are methods of using this compound as an inhibitor of hYAK3 proteins.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N9 | 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, 98416-72-9, name is 6-Bromo-2-chloro-3-methylquinoxaline, introducing its new discovery. Quality Control of 6-Bromo-2-chloro-3-methylquinoxaline

Molecular modeling studies and synthesis of novel quinoxaline derivatives with potential anticancer activity as inhibitors of c-Met kinase

In an effort to develop potent anti-cancer agents, we have synthesized some substituted quinoxaline derivatives. Reaction of 6-bromo-3-methylquinoxalin-2(1H)-one 1 with aromatic aldehydes furnished the styryl derivatives 2a-e. Alkylation of 1 with ethyl chloroacetate produced the N-alkyl derivatives 3. Hydrazinolysis of the ester derivative 3 with hydrazine hydrate afforded the hydrazide derivative 4. In addition, chlorination of 1 with phosphorus oxychloride afforded the 2-chloro derivative 5 which was used as a key intermediate for the synthesis of substituted quinoxaline derivatives 6-8, N-pyrazole derivative 9, tetrazolo[1,5-a]quinoxaline derivative 10 and Schiff base derivatives 13, 15 via reaction with several nucleophiles reagents. Docking methodologies were used to predict their binding conformation to explain the differences of their tested biological activities. All the tested compounds were screened in vitro for their cytotoxic effect on three tumor cell lines. Some new quinoxaline derivatives were studied as inhibitors of c-Met kinase, a receptor associated with high tumor grade and poor prognosis in a number of human cancers. Compounds 2e, 4, 7a, 12a, 12b and 13 showed the highest binding affinity with CDOCKER energy score, while showed the lowest IC50 values against three types of cancer cell lines. It is worth to mention that, compounds 2e, 7a, 12b and 13 showed comparable inhibition activity to the reference drug, while compounds 4 and 12a showed a more potent inhibition activity than Doxorubicin.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1991 | ChemSpider

6344-72-5, Name is 6-Methylquinoxaline, belongs to quinoxaline compound, is a common compound. Product Details of 6344-72-5In an article, once mentioned the new application about 6344-72-5.

Rapid, efficient and eco-friendly procedure for the synthesis of quinoxalines under solvent-free conditions using sulfated polyborate as a recyclable catalyst

An efficient and inexpensive sulfated polyborate catalyst was applied for the rapid synthesis of quinoxaline derivatives from various substituted o-phenylenediamines and 1,2-diketones/alpha-hydroxy ketones using sulfated polyborate is described. The catalyst has the advantage of Lewis as well as Bronsted acidity and recyclability without significant loss in catalytic activity. The key advantages of the present method are high yields, short reaction times, solvent-free condition, easy workup, and ability to tolerate a variety of functional groups, which give economical as well as ecological rewards. [Figure not available: see fulltext.]

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N27 | ChemSpider

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Safety of Quinoxaline-6-carboxylic acid. Introducing a new discovery about 6925-00-4, Name is Quinoxaline-6-carboxylic acid

Design, synthesis, and binding affinities of potential positron emission tomography (PET) ligands for visualization of brain dopamine D3 receptors

We here report the synthesis of compounds structurally related to the high-affinity dopamine D3 receptor ligand N-[4-[4-(2,3- dichlorophenyl)piperazin-1-yl]butyl]-7-methoxy-2-benzofurancarboxamide (1). All compounds were specifically designed as potential PET radioligands for brain D3 receptors visualization, having lipophilicity within a range for high brain uptake and weak nonspecific binding (2 < ClogP < 3.5) and bearing a methoxy substituent for easy access to labeling with the positron emitter isotope 11C. N-[4-[4-(5-methoxy-2-benzisoxazolyl) piperazin-1-yl]butyl]-4-(4-morpholinyl)benzamide (22), N-[4-[4-(5-methoxy-2- benzisoxazolyl)piperazin-1-yl]butyl]-4-(1H-imidazol-1-yl)benzamide (23), and N-[4-[4-(5-methoxy-2-benzisoxazolyl)piperazin-1-yl]butyl]-5-(2-furanyl) -1H-pyrazole-3-carboxamide (24) displayed good D3 receptor affinities (Ki values 38.0, 22.6, and 21.3 nM, respectively) and were selective over D2 receptor. Moreover, compounds 22-24 were able to permeate the Caco-2 cell monolayer, differently from compound 1. Although the goal to identify potential PET radioligands with subnanomolar affinities for D 3 receptor was not achieved, the proposed strategy could be a starting point for future developments. Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Safety of Quinoxaline-6-carboxylic acid, you can also check out more blogs about6925-00-4

Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N808 | 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

Thioether-Functionalized Quinone-Based Resorcin[4]arene Cavitands: Electroswitchable Molecular Actuators

The utility of molecular actuators in nanoelectronics requires activation of mechanical motion by electric charge at the interface with conductive surfaces. We functionalized redox-active resorcin[4]arene-quinone cavitands with thioethers as surface-anchoring groups at the lower rim and investigated their propensity to act as electroswitchable actuators that can adopt two different conformations in response to changes in applied potential. Molecular design was assessed by DFT calculations and X-ray analysis. Electronic properties were experimentally studied in solution and thin films electrochemically, as well as by X-ray photoelectron spectroscopy on gold substrates. The redox interconversion between the oxidized (quinone, Q) and the reduced (semiquinone, SQ) state was monitored by UV-Vis-NIR spectroelectrochemistry and EPR spectroscopy. Reduction to the SQ state induces a conformational change, providing the basis for potential voltage-controlled molecular actuating devices.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1446 | ChemSpider

Synthetic Route of 2213-63-0, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 2213-63-0, Name is 2,3-Dichloroquinoxaline, molecular formula is C8H4Cl2N2. In a Article，once mentioned of 2213-63-0

Synthsis, characterisation and anti microbial evaluation of novel 2-substituted quinoxaline derivatives

Literature survey indicates that 2-substituted quinoxaline derivatives possess different pharmacological and biological activities, of which most potent activities are anti-bacterial, anti-fungal, anti-inflammatory, and analgesic activity. In view of above literature, we planned to synthesize novel 2-Substituted quinoxaline derivatives. The final synthesised were characterized by physical (M.P, TLC) and spectral analysis (1HNMR, IR). The 2-substituted quinoxaline nucleus was constructed by condensation of o-phenylene diamine and diethy loxalate in equimolar quantities which upon heating yielded quinoxaline-2, 3-diol moiety. The quinoxaline-2,3-diol was treated with POCl3 to furnish 2,3-di chloro quinoxaline (2). Further the 2-chloro-3-hydrazinoquinoxaline (3) was synthesized by the reaction of 2,3-dichloroquinoxaline (2) and hydrazine hydrate in methanolic medium upon refluxing for 60 min. different Schiff’s bases of 2-chloro-3-hydrazine quinoxaline were obtained by refluxing the appropriate substituted benzaldehyde and 2-chloro-3-hydrazinoquinoxaline (3) in acetic medium for 3 h. All the synthesized compounds were screened for their antibacterial and antifungal activities by using cup plate method against Bacillus subtilis, Bacillus pumilus, Escherichia coli, Pseudomonas aeruginosa, Aspergillus Niger and Candida albicans at 100, 50 ig/mL concentration using ciprofloxacin and clotrimazole as reference standard drugs respectively. Compounds 4e and 4f showed significant activity against Pseudomonas aeruginosa, 4a and 4d showed significant activity against Bacillus subtilis, the compound 4c showed good activity against the organism Bacillus pumilus, whereas the compound 4a shown moderate antifungal activity against Candida albicans. The rest of the compounds showed weak activity when compared to the standard ciprofloxacin and clotrimazole.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1379 | ChemSpider

Related Products of 6298-37-9, Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. 6298-37-9, Name is Quinoxalin-6-amine,introducing its new discovery.

PIPERIDINYL- AND PIPERAZINYL-SUBSTITUTED HETEROAROMATIC CARBOXAMIDES AS MODULATORS OF GPR6

Disclosed are compounds of Formula 1 and pharmaceutically acceptable salts thereof, wherein L, R4, R5, R8, R10, R11, X1, X2, X3, X9, X12, and Z are defined in the specification. This disclosure also relates to materials and methods for preparing compounds of Formula 1, to pharmaceutical compositions which contain them, and to their use for treating diseases, disorders, and conditions associated with GPR6.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N67 | ChemSpider

Reference of 32601-86-8, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 32601-86-8, Name is 2-Chloro-3-methylquinoxaline, molecular formula is C9H7ClN2. In a Article，once mentioned of 32601-86-8

REAKTIONEN MIT 3-CHLORCHINOXALIN-2-CARBALDEHYD

Das Chlor im 3-Chlorchinoxalin-2-carbaldehyd (Ia) wird nucleophil substituiert.CH-acide-Verbindungen und N-Nucleophile reagieren an der Formylgruppe.Das Hydrazon und das Oxim von Ia werden unter Ringschlussreaktionen zu 1,2,3-Triazolo<1,5-a>chinoxalin und 3-Cyanochinoxalin-2(1H)-on (VIII) uebergefuehrt.Mit Thioglykolsaeureethylester entsteht aus Ia Thieno<2,3-b>chinoxalin-2-carbonsaeureethylester IX).Die Umsetzung von 2-Chlor-3-methylchinoxalin (IIa) mit nucleophilen Reagenzien wird durchgefuehrt.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1035 | ChemSpider

Related Products of 18514-76-6, 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, 18514-76-6, 5-Nitroquinoxaline, introducing its new discovery.

Oxidation of 2-arylindoles for synthesis of 2-arylbenzoxazinones with oxone as the sole oxidant

A novel and efficient method for the oxidation of 2-arylindoles to synthesize 2-arylbenzoxazinones utilizing oxone as the sole oxidant has been developed. The reaction tolerates a wide range of functional groups and allows quick and atom-economical assembly of a variety of valuable 2-arylbenzoxazinones in high yields.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N874 | ChemSpider

Reference of 1448-87-9, Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. 1448-87-9, Name is 2-Chloroquinoxaline,introducing its new discovery.

Recent advances in the synthesis of benzimidazol(on)es: Via rearrangements of quinoxalin(on)es

This is the first review describing all the quinoxaline-benzimidazole rearrangements as a whole and the new quinoxalinone-benzimidazol(on)e rearrangements in particular when exposed to nucleophilic rearrangements for the synthesis of various biheterocyclic motifs. The scope of the rearrangements is illustrated by way of numerous examples of their application, and in doing so, the review contains over 131 references and covers all of the literature, from the first report of the rearrangement of 2,3-diphenylquinoxaline by Ogg and Bergstrom in 1931 up to more recent examples in the past few years. The mechanisms for the selected transformations are also discussed.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N625 | ChemSpider