Results 1 to 10 of about 635,495 (333)
1,4-Di-N-oxide quinoxaline-2-carboxamide: Cyclic voltammetry and relationship between electrochemical behavior, structure and anti-tuberculosis activity [PDF]
Electrochimica Acta, 2011 To gain insight into the mechanism of action, the redox properties of 37 quinoxaline-2-carboxamide 1,4-di-N-oxides with varying degrees of anti-tuberculosis activity were studied in dimethylformamide (DMF) using cyclic voltammetry and first derivative cyclic voltammetry. For all compounds studied, electrochemical reduction in DMF is consistent with the
Elsa Moreno‐Viguri +8 more
core +6 more sources
Bromocyclization of Unsaturated Oximes. Synthesis of Five-Membered Cyclic Nitrones (Pyrroline N-Oxides) [PDF]
Zeitschrift für Naturforschung B, 2006 The cyclization of a ribose-derived pentenose oxime with various halogen electrophiles showed bromine to be the most effective reagent, leading to 80% of L-lyxo/D-ribo-pyrroline N-oxides in an 84:16 diastereomeric ratio. In order to explore the scope of this facile process, several other γ,δ - unsaturated oximes were submitted to this reaction ...
M. Gulla +4 more
semanticscholar +3 more sources
Chemical and Pharmaceutical Bulletin, 1984 The thermolysis of 1-methyl-2-vinylpiperidine N-oxide (13) resulted in Meisenheimer [1, 2] rearrangement to give the hexahydro-1, 2-oxazepine (23) and no [2, 3]-sigmatropic rearrangement product (24). Similarly, the 1-methyl-1, 2, 5, 6-tetrahydropyridine N-oxides (15), on heating, gave only the tetrahydro-1, 2-oxazepines (26, 27), together with the ...
Haruki Sashida, Takashi Tsuchiya
semanticscholar +4 more sources
Cyclic voltammetry of some quinoxaline di-N-oxides and quinoxalines in dimethylformamide [PDF]
Electrochimica Acta, 1992 Abstract The first cathodic reductions of two series of substituted quinoxaline di- N -oxides and quinoxalines in dimethylformamide were measured. The effect of substituent on these reductions is reported and reversibility is discussed.
James R. Ames +2 more
openalex +4 more sources
Halogen‐Free Anisotropic Atomic‐Layer Etching of HfO2 at Room Temperature [PDF]
Small ScienceHafnium(IV) oxide (HfO2)‐based materials have attracted substantial interest owing to their outstanding performance in advanced ultrathin semiconductor devices.
Shih‐Nan Hsiao +5 more
doaj +2 more sources
Fate of Pyrrolizidine Alkaloids in Soil: Insights from Myosotis arvensis L. and Senecio vulgaris L. [PDF]
ToxinsPyrrolizidine alkaloids are plant-derived toxins with environmental persistence and the potential to contaminate soil, water, and adjacent crops. This study investigated the leaching behavior and environmental fate of PAs from two PA-producing weeds ...
Ilva Nakurte +2 more
doaj +2 more sources
Journal of Health Science, 2004 The aim of this study was to establish a preparation method needed to analyze the metabolites of an analytical procedure for antipsychotic phenothiazines and tertiary amino cyclic antidepressants by chemical reaction. These drugs were oxidized to their sulfoxide and N-oxide, respectively, with hydrogen peroxide using titanosilicate as the catalyst.
Akira Ogamo, Mariko Fukumoto
openalex +3 more sources
Carbon Trends, 2023 The structural and surface modifications have been studied on the hydrothermally Nitrogen (N) and Sulphur (S) doped and thermally reduced at 350 °C nitrogen-doped, nitrogen-sulfur-doped graphene oxides.
G. Vignesh +5 more
doaj +1 more source