Awesome and Easy Science Experiments about 49679-45-0

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Synthesis of Cyano-Substituted Heterocycles by Means of Tetraethylammonium Cyanide

Chloropyrimidines 2, 3 and Chlorquinazolines 9, 10, after conversion into trimethylammonio derivatives 4, 5, 11, 12, react with tetraethylammonium cyanide 1a under very mild conditions to give pyrimidine carbonitriles 6, 7 and quinazoline carbonitriles 13, 14.Direct synthesis of quinoxaline carbonitriles 19 is possible by reaction of chloroquinoxalines 15, 18 with 1a.

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Properties and Exciting Facts About Quinoxalin-6-amine

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Related Products of 6298-37-9, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.6298-37-9, Name is Quinoxalin-6-amine, molecular formula is C8H7N3. In a article£¬once mentioned of 6298-37-9

Nickel-catalyzed amination of Aryl chlorides with ammonia or ammonium salts

The nickel-catalyzed amination of aryl chlorides to form primary arylamines occurs with ammonia or ammonium sulfate and a well-defined single-component nickel(0) precatalyst containing a Josiphos ligand and an eta2-bound benzonitrile ligand. This system also catalyzes the coupling of aryl chlorides with gaseous amines in the form of their hydrochloride salts. Simple alternative: The title reaction, which results in primary arylamines, is catalyzed by well-defined single-component nickel(0) precatalysts containing a Josiphos ligand and an eta2-bound benzonitrile ligand. This system also catalyzes the coupling of aryl chlorides with gaseous amines in the form of their hydrochloride salts.

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Archives for Chemistry Experiments of 162135-93-5

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Structure-activity relationships for analogues of the phenazine-based dual topoisomerase I/II inhibitor XR11576

As part of a programme to identify further analogues of the dual topo I/II inhibitor XR11576, we describe here the syntheses and SAR studies of various ‘minimal’ and 3,4-benzofused phenazine chromophores of the phenazine template of XR11576.

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More research is needed about 2213-63-0

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2213-63-0, Name is 2,3-Dichloroquinoxaline, belongs to quinoxaline compound, is a common compound. Application In Synthesis of 2,3-DichloroquinoxalineIn an article, once mentioned the new application about 2213-63-0.

Bridgehead nitrogen heterocyclic systems: Synthesis and evaluation of biological activity of 2,3-dihydrothiazolo[3?,2? :2,3]-astriazino[5,6-b] indole and quinoxalino[2?,3?:4,5] thiazolo [3,2-b]indolo[2,3-e]-astriazine and their isomeric systems

2, 3-Dihydro-6-ethyl-5H-as-triazino[5, 6-b]indole-3-thione 2, on condensation with 1, 2-dibromoethane and 2, 3-dichloroquinoxaline gives the cyclized products, 9-ethyldihydrothiazolo[3?, 2?:2, 3]-as-triazino[5, 6-b]indole hydrobromide 4 and 11-ethyl quinoxalino[2?, 3?:4, 5]thiazolo[3, 2-b]indolo[2, 3-e]-as-triazine 6 respectively and not the angular isomers, 2, 3-dihydro-9-ethyl-1H-[1, 31thiazolo[2?, 3?:3, 4]-as-triazino[5, 6-blindole hydrobromide 3 and 1-ethylquinoxalino [2?, 3?:4, 5]thiazolo[2, 3-c]indolo[2, 3-e]-as-triazine 5. The unequivocal synthesis of the latter 3 and 5 has been accomplished by reaction of 7-Ethylisatin-3-thiosemicarbazone 1 with 1, 2-dibromoethane and 2, 3-dichloroquinoxaline, respectively. The antibacterial and antifungal activity of the synthesized compounds have also been evaluated.

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Discovery of 2213-63-0

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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 Patent£¬once mentioned of 2213-63-0

FLUORO-CONTAINING COMPOUNDS, USE AND PREPARATION THEREOF

The present teachings relate to a fluoro-containing compound, a composition thereof, a method of using the compound or the composition in treating a disease, and a method of preparing the compound. In a particular example, the compound is chosen from Formulae 4, 4f, 7, 8, 9, 10, 11, or 12, or a salt thereof, or a solvate of any of the foregoing.

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ISOLATION OF THE INTERMEDIATES AND IMPROVED SYNTHESIS OF PYRIDO<1',2':1.2>IMIDAZO<4,5-b>PYRAZINES AND QUINOXALINES

2-(Pyrid-2′-yl)amino-3-chloro-5,6-dicyanopyrazines (IIa, IId, and IIe) and 2-(pyrid-2′-yl)amino-3-chloro-6-nitroquinoxalines (Va-c) were isolated for the first time in the course of the reaction of 2,3-dichloro-5,6-dicyanopyrazine (I) and 2,3-dichloro-6-nitroquinoxaline (IVa), respectively, with 2-aminopyridines.Furthemore, the yield of pyrido<1',2':1,2>imidazo<4,5-b>quinoxalines was remarkably improved due to the modification of the reaction conditions.

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New explortion of 2,6-Dichloroquinoxaline

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THE FACILE SYNTHESIS OF QUINOXALINYL-2-OXYPHENOLS

Facile synthesis of quinoxalinyl-2-oxyphenols are described.The condensation of 2-chloroquinoxalines with three molar equivalent of dihydroxybenzene in basic medium gave preferentially quinoxalinyl-2-oxyphenols, which involves nucleophilic cleavage of the initially formed bis(quinoxalinyl-2-oxy)benzenes by an excess of dihydroxybenzene.

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Discovery of 2-Chloro-3-methylquinoxaline

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Synthesis and antidiabetic activity of 3,6,7-trisubstituted-2-(1H-imidazol- 2-ylsulfanyl)quinoxalines and quinoxalin-2-yl isothioureas

Two series of 3,6,7-trisubstituted-2-(1H-imidazol-2-ylsulfanyl)- quinoxalines 2a-1 and 2-(quinoxalin-2-yl)-isothioureas 3a-1 were prepared. All the test compounds 2a-1 and 3a-1 were screened in vitro, in a RIN5F cell-based assay for glucose-dependent insulinotropic activity. A significant concentration and glucose-dependent insulin secretion effect was seen with compounds 2a-1 and the insulinotropic activity of compound 21 was found to be identical to that of the standard compound (6,7-dichloro-2-trifluromethyl-3-(5-methyl-1,3,4- thiadiazo-2-ylsulfanyl)-quinoxaline (1)).

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C-N coupling of indoles and carbazoles with aromatic chlorides catalyzed by a single-component NHC-nickel(0) precursor

A new and efficient nickel-based protocol for the N-arylation of indoles and carbazoles with aromatic chlorides, the least expensive of the aryl halides, is described. The procedure provides selectively N-(hetero)arylation products in good to high yields, in short reaction times and without adding an excess of ligands.

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Simple exploration of 15804-19-0

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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, 15804-19-0, name is Quinoxaline-2,3(1H,4H)-dione, introducing its new discovery. SDS of cas: 15804-19-0

Discovery and antiproliferative evaluation of new quinoxalines as potential DNA intercalators and topoisomerase II inhibitors

In continuation of our previous work on the design and synthesis of topoisomerase II (Topo II) inhibitors and DNA intercalators, a new series of quinoxaline derivatives were designed and synthesized. The synthesized compounds were evaluated for their cytotoxic activities against a panel of three cancer cell lines (Hep G-2, Hep-2, and Caco-2). Compounds 18b, 19b, 23, 25b, and 26 showed strong potencies against all tested cell lines with IC50 values ranging from 0.26 ¡À 0.1 to 2.91 ¡À 0.1 muM, comparable with those of doxorubicin (IC50 values ranging from 0.65 ¡À 0.1 to 0.81 ¡À 0.1 muM). The most active compounds were further evaluated for their Topo II inhibitory activities and DNA intercalating affinities. Compounds 19b and 19c exhibited high activities against Topo II (IC50 = 0.97 ¡À 0.1 and 1.10 ¡À 0.1 muM, respectively) and bound the DNA at concentrations of 43.51 ¡À 2.0 and 49.11 ¡À 1.8 muM, respectively, whereas compound 28b exhibited a significant affinity to bind the DNA with an IC50 value of 37.06 ¡À 1.8 muM. Moreover, apoptosis and cell-cycle tests of the most promising compound 19b were carried out. It was found that 19b can significantly induce apoptosis in Hep G-2 cells. It has revealed cell-cycle arrest at the G2/M phase. Moreover, compound 19b downregulated the Bcl-2 levels, indicating its potential to enhance apoptosis. Furthermore, molecular docking studies were carried out against the DNA?Topo II complex to examine the binding patterns of the synthesized compounds.

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