Results 281 to 290 of about 635,495 (333)
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Photoelectron spectra of cyclic azo N-oxides and azo N,N'-dioxides
The Journal of Organic Chemistry, 1977K. Gilbert
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Angewandte Chemie, 2023
The selective electrochemical synthesis of 1H-indazoles and their N-oxides and the subsequent C-H functionalization of the 1H-indazole N-oxides are described. The electrochemical outcomes were determined by the nature of the cathode material.
Sagar Arepally +4 more
semanticscholar +1 more source
The selective electrochemical synthesis of 1H-indazoles and their N-oxides and the subsequent C-H functionalization of the 1H-indazole N-oxides are described. The electrochemical outcomes were determined by the nature of the cathode material.
Sagar Arepally +4 more
semanticscholar +1 more source
Tetrahedron, 2023 Organic Letters, 2018
By employing reusable nanocobalt oxides as the catalysts, a site-specific oxidative C-H chalcogenation of (hetero)aryl-fused cyclic amines with various thiols and diselenides is presented for the first time. The reaction proceeds selectively at the sites
Zhenda Tan +5 more
semanticscholar +1 more source
By employing reusable nanocobalt oxides as the catalysts, a site-specific oxidative C-H chalcogenation of (hetero)aryl-fused cyclic amines with various thiols and diselenides is presented for the first time. The reaction proceeds selectively at the sites
Zhenda Tan +5 more
semanticscholar +1 more source
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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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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Tetrahedron, 1982
Abstract 1,2-Oxazine N-oxides derived from aminocyclohexenes open into the corresponding nitroalkylated trisubstituted enamines, whereas those derived from aminocyclopentenes give stable tetrasubstituted enamines. Both open-chain systems are easily hydrolyzed to the corresponding γ-nitrocycloalkanones.
DANEO S. +3 more
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Abstract 1,2-Oxazine N-oxides derived from aminocyclohexenes open into the corresponding nitroalkylated trisubstituted enamines, whereas those derived from aminocyclopentenes give stable tetrasubstituted enamines. Both open-chain systems are easily hydrolyzed to the corresponding γ-nitrocycloalkanones.
DANEO S. +3 more
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ChemInform, 2010
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.
Julie Schleiss +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.
Julie Schleiss +2 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
openaire +1 more source