Results 251 to 260 of about 29,062 (270)
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2016
The synthesis of quinoxalines has been intensively studied in the past, especially because of the diverse biological activities ascribed to many representatives of this class of compounds. Consequently, a large variety of synthetic methods for the synthesis of functionalized quinoxalines have been reported in literature.
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The synthesis of quinoxalines has been intensively studied in the past, especially because of the diverse biological activities ascribed to many representatives of this class of compounds. Consequently, a large variety of synthetic methods for the synthesis of functionalized quinoxalines have been reported in literature.
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Tetrahedron, 1964
Abstract Base catalysed intramolecular cyclization of α-cyano- o -nitroacetanilides (Ia–d) to the corresponding 2-cyano-3-hydroxyquinoxaline 1-oxides (IIa-d) is described, and a mechanism proposed. The cyanoquinoxaline N-oxides (IIa-d) on reduction are deoxygenated with simultaneous loss of the nitrile group, and when heated with concentrated aqueous
M. S. Habib, Yusuf Ahmad, Ziauddin
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Abstract Base catalysed intramolecular cyclization of α-cyano- o -nitroacetanilides (Ia–d) to the corresponding 2-cyano-3-hydroxyquinoxaline 1-oxides (IIa-d) is described, and a mechanism proposed. The cyanoquinoxaline N-oxides (IIa-d) on reduction are deoxygenated with simultaneous loss of the nitrile group, and when heated with concentrated aqueous
M. S. Habib, Yusuf Ahmad, Ziauddin
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Basicities of selected quinoxalines
Journal of Chemical & Engineering Data, 1982As part of a continuing investigation of the relationship between the structure and physical properties of nitrogen heterocyclic systems, we were interested in the basicities of selected quinoxalines and the hyperfine splitting patterns for the corresponding anion radicals.
J. Hodge Markgraf+3 more
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Quinoxaline/phenylquinoxaline copolymers
Journal of Applied Polymer Science, 1977AbstractThe thermal crosslinkability of the quinoxaline moiety incorporated within poly(phenylquinoxalines) was demonstrated by differential scanning calorimetry (DSC), torsional braid analysis (TBA), and high‐temperature adhesive evaluation. Several homopolymers, random copolymers, and polymer blends were prepared and evaluated.
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ChemInform, 1996
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
John Parrick+2 more
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
John Parrick+2 more
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Crosslinked polyamide‐quinoxalines
Journal of Polymer Science: Polymer Letters Edition, 1973O, S, SO OR SO2 AND Y IS O-PHENYLENE, M-PHENYLENE, P-PHENYLENE OR- 1,2-DI(NH2-),4-((3,4-DI(NH2-)PHENYL)-X-)BENZENE WITH AN AMIDE OF THE FORMULA 1,3-BIS(PHENYL-CO-CO-Y-NH-CO-),5-(R-OOC-)BENZENE THESE POLYMERS FIND USE AS FILM OR COATINGS AND CAN ALSO BE MADE INTO FIBERS.
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Quinoxaline derivatives of severalalkaloids
Chemistry of Natural Compounds, 2010New quinoxaline derivatives were prepared by reaction of 2-quinoxalinehydroximoylbromide with the alkaloids anabasine, cytisine, and salsoline.
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Quinoxaline–As a Parent Heterocycle
2016Quinoxalines are products of the spontaneous condensation of 1,2-diaminobenzene (1,2-DAB) with 1,2-dicarbonyl compounds.
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Synthesis of Quinoxaline Macrocycles
2016Macrocyclic compounds are widespread in nature. These are porphyrins (chlorophyll, heme as a part of hemoglobin, Vitamin B12), cyclic peptides (antibiotics gramicidin C, capreomycin, valinomycin, vancomycin, amato, and fallotokcins of death cup amanita (Amanita phalloides) and some toadstools), macrocyclic alkaloids (including tubocurarin–the main ...
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