Results 161 to 170 of about 23,920 (210)
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Chemico-Biological Interactions, 1986
Cyclic voltammetry data were obtained for eight phenazines and phenazine-N-oxides, and eleven quinoxalines and quinoxaline-N-oxides: 1,6-phenazine-diol-5,10-dioxide (iodinin), iodinin copper complex, 6-methoxy-1-phenazinol-5,10-dioxide 1,6-dimethoxyphenazine-5-oxide, 1,6-phenazinediol, 1,6-dimethoxyphenazine, quinoxaline-1,4-dioxide, 2 ...
Michael D Ryan, Peter Kovacic
exaly +4 more sources
Cyclic voltammetry data were obtained for eight phenazines and phenazine-N-oxides, and eleven quinoxalines and quinoxaline-N-oxides: 1,6-phenazine-diol-5,10-dioxide (iodinin), iodinin copper complex, 6-methoxy-1-phenazinol-5,10-dioxide 1,6-dimethoxyphenazine-5-oxide, 1,6-phenazinediol, 1,6-dimethoxyphenazine, quinoxaline-1,4-dioxide, 2 ...
Michael D Ryan, Peter Kovacic
exaly +4 more sources
A Novel and Efficient Deoxygenation of Hetero Cyclic N-Oxides Using ZrCl4/NaBH4
Chemistry Letters, 1999Abstract A practical and novel reagent system ZrCl4/NaBH4 is used for the deoxygenation of N-Oxides to amines is described.
K Purushothama Chary +2 more
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Copper-catalyzed cross-dehydrogenative coupling of pyridine N-oxides with cyclic ethers
Journal of Organometallic Chemistry, 2016Highly chemo- and regioselective synthesis of 2-alkylpyridine N-oxides from pyridine N-oxides and cyclic ethers has been developed through copper-catalyzed CDC reactions using CuO as the catalyst under mild reaction conditions. Optimization study showed that, K2S2O8 is the best oxidant for the reaction and the mechanistic study proved the radical ...
Ebrahim Kianmehr +4 more
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An Efficient and Chemoselective Deoxygenation of Hetero Cyclic N-Oxides Using Licl/nabh4
Synthetic Communications, 2000Abstract A practical & novel reagent system L1C1/NaBH4 is used for the deoxygenation of N-Oxides to amines is described.
S. Raja Ram +2 more
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Tetrahedron Letters, 2008
Acid promoted cyclization of the geranylamine N-oxide (E)-4 followed by base-catalyzed intramolecular aldol condensation afforded 1-acetyl-4,4-dimethyl-1-cyclohexene (7) in one-pot operation. Reduction of 7, which possess strong fruity odor, followed by lipase-catalyzed kinetic resolution furnished the acetate (R)-26 (>49.9% yield, >99% ee) and the ...
Kunihiko Takabe +3 more
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Acid promoted cyclization of the geranylamine N-oxide (E)-4 followed by base-catalyzed intramolecular aldol condensation afforded 1-acetyl-4,4-dimethyl-1-cyclohexene (7) in one-pot operation. Reduction of 7, which possess strong fruity odor, followed by lipase-catalyzed kinetic resolution furnished the acetate (R)-26 (>49.9% yield, >99% ee) and the ...
Kunihiko Takabe +3 more
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Electrochimica Acta, 1987
Abstract The cathodic reductions of two series of substituted quinoxaline di- N -oxides and quinoxalines in acetonitrile were measured in the potential range of 0 to −2.0 V and 0 to −2.3 V vs sce , respectively. Two irreversible reductions were observed in the first series, and one reversible reduction for the second.
K.R. Barqawi, M.A. Atfah
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Abstract The cathodic reductions of two series of substituted quinoxaline di- N -oxides and quinoxalines in acetonitrile were measured in the potential range of 0 to −2.0 V and 0 to −2.3 V vs sce , respectively. Two irreversible reductions were observed in the first series, and one reversible reduction for the second.
K.R. Barqawi, M.A. Atfah
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Chemischer Informationsdienst, 1980
AbstractDie cyclischen Acetylene (Ia) und (Ib) addieren elementaren Schwefel zu den Dithieten (IIa) und (IIb), mit Pyridin‐N‐oxid (III) und (Ia) IÖO wird das Spiroazepin (IV) erhalten, das thermisch in das Pyridylthiepinon (V) umgelagert werden kann.
A. KREBS +4 more
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AbstractDie cyclischen Acetylene (Ia) und (Ib) addieren elementaren Schwefel zu den Dithieten (IIa) und (IIb), mit Pyridin‐N‐oxid (III) und (Ia) IÖO wird das Spiroazepin (IV) erhalten, das thermisch in das Pyridylthiepinon (V) umgelagert werden kann.
A. KREBS +4 more
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ChemInform, 2000
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.
S. Raja Ram +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.
S. Raja Ram +2 more
openaire +1 more source
Chemistry of Heterocyclic Compounds, 1988
4H-Imidazole 1,3-dioxides and 4H-imidazole 3-oxides were obtained by oxidation of 1-hydroxy-3-imidazoline 3-oxides and 1-hydroxy-3-imidazolines with lead and manganese dioxides or the stable nitroxyl radical, while 4H-imidazole 1-oxides were obtained by thermal decomposition of 1-acetoxy-3-imidazoline 3-oxides.
I. A. Grigor'ev +2 more
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4H-Imidazole 1,3-dioxides and 4H-imidazole 3-oxides were obtained by oxidation of 1-hydroxy-3-imidazoline 3-oxides and 1-hydroxy-3-imidazolines with lead and manganese dioxides or the stable nitroxyl radical, while 4H-imidazole 1-oxides were obtained by thermal decomposition of 1-acetoxy-3-imidazoline 3-oxides.
I. A. Grigor'ev +2 more
openaire +1 more source