Results 151 to 160 of about 41,844 (188)

Research on 1, 2, 4-triazoles [PDF]

Chemistry of Heterocyclic Compounds, 1966
The stability of sulfides and sulfones of 1-aryltetrazoles and 4-aryl-1, 2, 4-triazoles depends on the acceptor character of the heterocyclic ring. Unlike tetrazole sulfides, triazole sulfides do not undergo hydrolysis, Tetrazole sulfones are more readily hydrolyzed than triazole ones.
I. L. Shegal, I. Ya. Postovskii
  +6 more sources

Synthesis of 5-amino-1-(aminothioformyl)-1, 2, 4-triazoles [PDF]

Chemistry of Heterocyclic Compounds, 1971
By the reaction of 5-amino-1, 2, 4-triazoles with benzoyl isothiocyanate we have synthesized 5-amino-1-(benzoylaminothioformyl)-1, 2, 4-triazoles, which form 5-amino-1-(aminothioformyl)-1, 2, 4-triazoles on alkaline hydrolysis.
R. P. Bokaldere, G. I. Chipen, V. Ya. Grinshtein   +2 more
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The preparation of 3:5‐dimethyl‐1‐phenyl‐1:2:4‐triazole [PDF]

Journal of Applied Chemistry, 1952
AbstractOptimum conditions for the laboratory‐scale preparation of 3 : 5‐dimethyl‐1‐phenyl‐1 : 2 : 4‐triazole by the Einhorn‐Brunner method have been studied. The mechanism of the reaction is different from those involved in the triazole syntheses of Pellizzari and Kaiser.
J. B. Polya, A. A. Komzak
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1 : 2 : 4-triazole as a corrosion inhibitor for copper

Corrosion Science, 1980
Abstract The solution chemistry of 1 : 2 : 4-triazole (TRZ) is investigated in the range of solution concentrations in which the compound acts as a corrosion inhibitor for copper. Parallel photo-electron spectroscopic studies show that although a surface layer of Cu(I) complex is formed at low TRZ concentrations, this is ineffective as an inhibitor ...
P.G. Fox, P.A. Bradley
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1, 2, 4 - triazole-aldehydes

2023
Althouth many C-aldehydes of azoles and azines, including those of 1,2,3-triazoles, are known and readily obtainable, free aldehydes derived from 1,2,4-triazole do not appear to have been isolated previously. The main aim of the work submitted in this thesis was the synthesis of such 1,2,4-triazole-C-aldehydes.
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Reaction of 3-amino-1:2:4-triazole with lactoperoxidase

Archives of Biochemistry and Biophysics, 1973
Bovine lactoperoxidase (LPO) gradually lost its enzymatic activity when dialyzed against a solution of 3-amino-1:2:4-triazole (AT) and hydrogen peroxide at pH 7.0. Amino acid analysis of the completely inactive enzyme revealed the formation of a new ninhydrin-positive chromatographic peak.
Joyce Young Chang, Walter A. Schroeder
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Synthesis of some nitro and amino derivatives of 1, 2, 4-triazole-5-thiones and 1, 2, 4-triazoles

Chemistry of Heterocyclic Compounds, 1967
Isomeric 3-(nitrophenyl)-1, 2, 4-triazole-5-thiones are synthesized by cyclizing 1-nitrobenzoylthiosemicarbazides. 1-(4-Nitrophenyl)-1, 2, 4-triazole-3-thione is prepared by condensing 4-(4-nitrophenyl) thiosemicarbazide with formic acid. Oxidation converts the triazolethiones to nitrophenyltriazoles, and the latter are reduced to aminophenyltriazoles.
D. E. Duka, G. I. Chipen, V. Ya. Grinshtein   +2 more
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Basicity and structure of 1, 2, 4-triazole derivatives

Chemistry of Heterocyclic Compounds, 1967
Basicity constants for a number of 1, 2, 4-triazole derivatives are determined. An assumed amine structure for 3-amino-1, 2, 4-triazoles in aqueous solution is demonstrated. It is assumed that protonization of 3- and 4-amino-1, 2, 4-triazoles occurs at the nitrogen in the heterocyclic ring, and not at the amino group.
M. S. Pevzner, V. A. Lopyrev, L. I. Bagal   +2 more
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