Month: September 2021

New Advances in Chemical Research, May 2021. The transformation of simple hydrocarbons into more complex and valuable products via catalytic C–H bond functionalisation has revolutionised modern synthetic chemistry.Synthetic Route of 2213-63-0, In a article, mentioned the application of 2213-63-0, Name is 2,3-Dichloroquinoxaline, molecular formula is C8H4Cl2N2

Novel oxoimidazoquinoxalines of the formula STR1 wherein R1 and R2 are individually selected from the group consisting of hydrogen, chlorine and bromine, X is selected from the group consisting of hydrogen, alkyl of 1 to 5 carbon atoms, cycloalkyl of 3 to 5 carbon atoms and cycloalkyl-alkyl of 4 to 6 carbon atoms, R3 is selected from the group consisting of hydrogen alkyl of 1 to 5 carbon atoms, alkali metal, alkaline earth metal, aluminum, –NH4, organic amine and STR2 R4 and R5 are individually alkyl of 1 to 5 carbon atoms or taken together with the nitrogen atom form a saturated heterocycle of 4 to 6 carbon atoms optionally containing an oxygen atom or second nitrogen atom and n is a number from 1 to 5 and their non-toxic, pharmaceutically acceptable acid addition salts having antiallergic activity and their preparation.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1203 | ChemSpider

New Advances in Chemical Research, May 2021. The dynamic chemical diversity of the numerous elements, ions and molecules that constitute the basis of life provides wide challenges and opportunities for research. Related Products of 15804-19-0, We’ll be discussing some of the latest developments in chemical about CAS: 15804-19-0, name is Quinoxaline-2,3(1H,4H)-dione. In an article，Which mentioned a new discovery about 15804-19-0

XK469 is identified as a potent quinoxaline antineoplastic agent based on its significant clinical efficacy. It probably exerts its activity via DNA topoisomerase II (topo II) inhibition. To obtain more effective antineoplastic agents, a spectrum of peptidomimetic-type quinoxaline analogues of XK469 was herein designed, synthesized, and evaluated. Few compounds (e.g. 13a and 13b) exhibited obvious cytotoxicity indicated by in vitro anti-proliferative assay. SAR investigation revealed that introducing of hydrophobic tert-butylamine or dodecylamine moiety at the 3-position of quinoxaline core is favorable for achieving a better anti-proliferative potency, while peptidomimetic derivatives only yielded moderate cytotoxicity. Compounds with improved anti-proliferative activities also demonstrated decent anti-metastatic potencies comparable with that of doxorubicin (Doxo) based on in vivo mouse model study. The topo II-mediated kinetoplast DNA (kDNA) decatenation assay as well as molecular docking studies implicated that these compounds tend to be potent topo II inhibitors. Overall, compounds 13a and 13b, 13b in particular, standed out from various assessments and might be promising candidates for further chemical optimization.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N415 | ChemSpider

Synthetic Route of 18514-76-6, New Advances in Chemical Research in 2021. The transformation of simple hydrocarbons into more complex and valuable products via catalytic C–H bond functionalisation has revolutionised modern synthetic chemistry. 18514-76-6, Name is 5-Nitroquinoxaline, molecular formula is C8H5N3O2. In a article，once mentioned of 18514-76-6

The Bronsted acid catalyzed direct nucleophilic substitution of tertiary propargylic alcohols with 2-aryl-substituted indoles has been studied. A competitive allenylation process takes place with appropriate substituents on the alkynol moiety. Starting from 2-arylindoles, new 3-allenyl and 3-dienylindole derivatives have been easily synthesized. Georg Thieme Verlag Stuttgart.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N905 | ChemSpider

New Advances in Chemical Research, May 2021. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction.Application of 6298-37-9, In a article, mentioned the application of 6298-37-9, Name is Quinoxalin-6-amine, molecular formula is C8H7N3

Treatment of 6-aminoquinoxaline with beta,beta-diactivated alkoxymethylene derivatives gave the corresponding N-(quinoxalin-6-yl)enamines. A variant of the SNV reaction mechanism was proposed for substitution of the alkoxymethylene compounds, on the basis of the structures of the precursor enol ether and the vinylic substitution product and on computations. Wiley-VCH Verlag GmbH & Co. KGaA, 2005.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N96 | ChemSpider

Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. Product Details of 1448-87-9, In a article, mentioned the application of 1448-87-9, Name is 2-Chloroquinoxaline, molecular formula is C8H5ClN2

Suzuki-Miyaura cross-coupling reaction with 2-heteroarylboronic acids is generally challenging due to these acids easy decomposition. To overcome this problem, we developed a coupling method that uses 2-heteroaryl pinacol boronates in the presence of 1.0 mol % Pd(OAc)2 and 2.0 mol % S-Phos with 4 equiv amount of LiOH in dioxane and H2O at 80 C for 30 min. This developed method allowed for the synthesis of a wide variety of 2-heteroaryl pyrimidines from 2-chloropyrimidyl derivatives in high yields, and is also useful in the preparation of various biaryl derivatives from heteroaryl chlorides.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N518 | ChemSpider

Safety of 2-Chloroquinoxaline, New research progress on 1448-87-9 in 2021. In classical electrochemical theory, both the electron transfer rate and the adsorption of reactants at the electrode control the electrochemical reaction. 1448-87-9, Name is 2-Chloroquinoxaline, molecular formula is C8H5ClN2. In a Article，once mentioned of 1448-87-9

A simple method for the introduction of a methyl and higher aliphatic group to various heteroarenes using very inexpensive reagents is described. It is based on the radical addition of a carboxylic xanthate followed by decarboxylation. Depending on the heteroarene structure, the decarboxylation can be spontaneous or induced by heating in N,N-dimethylacetamide or N-methyl pyrrolidone in a microwave oven.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N599 | ChemSpider

name: 2,3-Dichloroquinoxaline, New research progress on 2213-63-0 in 2021. Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. 2213-63-0, Name is 2,3-Dichloroquinoxaline, molecular formula is C8H4Cl2N2. In a Article，once mentioned of 2213-63-0

Three series of novel fused nitrogen heterocyclic systems such as 1,2,4-triazolo[1,5-a] pyridines (5-7 and 9), pyrido[1,2-b][1,2,4]triazines (10, 11, 13 and 15), and pyrido[1,2-b][1,2,4]triazepines (17, 18, 20 and 22) linked with a chromone moiety were synthesized from the key intermediate 1,6-diamino-(6-chloro-4-oxo-4H-chromen-3-yl)-2-oxo-1,2-dihydropyridine-3, 5-dicarbonitrile (4) with some electrophilic reagents. The structures of the novel compounds were established by elemental analyses and spectral data. All the products were also screened in vitro for their antimicrobial activity. Compounds 7, 9 and 15 showed the highest activities when compared with the reference drugs.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1248 | ChemSpider

New Advances in Chemical Research, May 2021. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction.Electric Literature of 25983-13-5, In a article, mentioned the application of 25983-13-5, Name is 6,7-Dichloroquinoxaline-2,3(1H,4H)-dione, molecular formula is C8H4Cl2N2O2

A novel beta-lactam compound of the formula ?1!: STR1 or a pharmaceutically acceptable salt thereof, which shows an excellent antibacterial activity against Gram-positive bacteria, especially against methicillin-resistant staphylococci and methicillin-resistant coagulase-negative staphylococci, and a process for producing the same. R1, R2, X, Y, Z are as defined in the specifacation.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1845 | ChemSpider

New Advances in Chemical Research, May 2021. The dynamic chemical diversity of the numerous elements, ions and molecules that constitute the basis of life provides wide challenges and opportunities for research. Application of 59564-59-9, We’ll be discussing some of the latest developments in chemical about CAS: 59564-59-9, name is 3,4-Dihydroquinoxalin-2(1H)-one. In an article，Which mentioned a new discovery about 59564-59-9

A facile and versatile procedure for the synthesis of 5-hetaryl-3-(2-hydroxybenzoyl)-1H-pyrroles and 4-(2-hydroxybenzoyl)-1H-pyrrole-2-carboxylic acid derivatives was established on the basis of TMSCl promoted recyclization of 3-formylchromone with various hetarylmethylamines and glycine derivatives.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N181 | ChemSpider

New Advances in Chemical Research, May 2021. The transformation of simple hydrocarbons into more complex and valuable products via catalytic C–H bond functionalisation has revolutionised modern synthetic chemistry.Safety of 2,3-Dichloroquinoxaline, In a article, mentioned the application of 2213-63-0, Name is 2,3-Dichloroquinoxaline, molecular formula is C8H4Cl2N2

The static and dynamic properties of the phosphorescent triplet states of quinoxaline and 2,3-disubstituted derivatives in hexane have been studied at 1.4 K using the methods of optically detected magnetic resonance.In addition, the absorption and phosphorescence excitation spectra have also been measured to attain the information about the low lying excited states.A systematic comparison has been made for the purpose of examining the effect of substitution.A significant enhancement of the pumping rates for the y spin sublevel observed in the chlorine-substituted derivatives is concluded to be due to the additional indirect process of intersystem crossing which occurs from S1 of n,?* to T1 passing through the intermediate triplet state of ?,?*.A detailed discussion on the observed phosphorescence spectra originating from the three sublevels has achieved a satisfactory success in understanding the mechanisms responsible for the radiative decay processes.It is concluded that the mechanisms due to vibronic coupling with closely lying n,?* triplet states are of little importance in the systems studied here.

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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1560 | ChemSpider