Results 171 to 180 of about 13,327,440 (231)

Utility of solid-phase extraction coupled with spectrophotometry for a novel green nano determination of copper(II) using 4-((furan-2-ylmethylene) amino)-5-methyl-4H-1,2,4-triazole-3-thiol

International Journal of Environmental Analytical Chemistry, 2021
A highly sensitive, selective and accurate method has been developed to determine ultra trace amounts of copper(II) by solid-phase extraction (SPE). The following parameters such as pH, concentration of the reagent, Triton X-100, reversed-phase Amberlite
Ali H Amin, M. Nassar, A. Gomaa
semanticscholar   +1 more source

Oxidation of 4-amino-5-aryl-4H-1,2,4-triazole-3-thiols

Russian Journal of Organic Chemistry, 2011
A simple and efficient method for the preparation of triazolesulfonic acids (II) is presented.
A. A. Shklyarenko, A. V. Moskvin, E. V. Fedorova   +2 more
openaire   +1 more source

Highly regioselective heterocyclization reactions of 1H-1,2,4-triazole-3-thiols with chloroacetylenephosphonates

Tetrahedron Letters, 2012
1-Chloroacetylene-2-phosphonates react with 1H-1,2,4-triazole-3-thiols in anhydrous acetonitrile with high regioselectivity to form the fused heterocycles, 6-(dialkoxyphosphoryl)-3H-thiazolo[3,2-b][1,2,4]triazol-7-ylium chlorides 1–5. A significant difference from the previously known reactions of binucleophiles with haloacetylenes is the involvement ...
Elena B. Erkhitueva, Albina V. Dogadina, Andrey V. Khramchikhin, Boris I. Ionin   +3 more
openaire   +1 more source

Synthesis, characterization, molecular docking studies of new alkyl derivatives of 5-(2-bromo-4-fluorophenyl)-4-ethyl-4H- -1,2,4-triazole-3-thiol.

Ceska a Slovenska farmacie : casopis Ceske farmaceuticke spolecnosti a Slovenske farmaceuticke spolecnosti, 2023
The main goal of this article is to present the results of the synthesis of new alkyl derivatives of 5-(2-bromo4-fluorophenyl)-4-ethyl-4H-1,2,4-triazole-3-thiol and molecular docking studies against COX-1 and COX-2.
R. Shcherbyna, V. Kalchenko, S. Kulish, V. Salionov, L. Morozova, Natalia Nedorezaniuk, O. Mazur   +6 more
semanticscholar   +1 more source

Detection of aldehydes with 4‐amino‐5‐hydrazino‐1,2,4‐triazole‐3‐thiol as spray reagent

Lipids, 1973
AbstractA spray reagent of 4‐amino‐5‐hydrazino‐1,2,4‐triazole‐3‐thiol, 2% in aqueous 1N NaOH, was used for the detection of aldehydes on chromatograms of lipids. Purple spots are produced with aldehydes, and 1 μg of palmitaldehyde can be detected easily on thin layer chromatograms.
C H, Rahn, H, Schlenk
openaire   +2 more sources

Synthesis and antibacterial activity of some new 4-anilino-5-phenyl-4H-1,2,4-triazole-3-thiol derivatives

Arabian Journal of Chemistry, 2016
4-Anilino-5-phenyl-4 H -1,2,4-triazole-3-thiol ( 1 ) reacted with formaldehyde and different amines to give Mannich bases 2a – i . Treatment of compound 1 with formaldehyde afforded the corresponding 2-hydroxymethyl derivative 3 , which upon its reaction
Bahgat R M Hussein
exaly   +2 more sources

Mechanism of 4‐methyl‐1,2,4‐triazol‐3‐thiole reaction with formaldehyde. A DFT study

Journal of Physical Organic Chemistry, 2007
AbstractContrary to the typical nucleophilic substitution, occurring on the sulfur atom of 4‐methyl‐1,2,4‐ triazol‐3‐thiole, the reaction with formaldehyde leads to the formation of the NC bond rather than the SC bond. The mechanism of this reaction has been characterized theoretically.
Monika Wujec, Piotr Paneth
openaire   +1 more source

Corrosion Inhibition of Copper in Seawater by 4-Amino-4H-1,2,4-Triazole-3-Thiol

Corrosion, 2012
Corrosion inhibition of copper in clean and sulfide-polluted salt water by 4-amino-4H-1,2,4-triazole-3-thiol (ATATH) was investigated. Potentiodynamic and potentiostatic polarization tests were performed. The effect of temperature and sulfide concentration was addressed.
F.M. Al Kharafi, I.M. Ghayad, R.M. Abdallah   +2 more
openaire   +1 more source

An Acid Inhibitor Research: 5-Phenyl-1H-1,2,4-triazole-3-thiol

Protection of Metals and Physical Chemistry of Surfaces, 2019
The effect of 5-Phenyl-1H-1,2,4-triazole-3-thiol (5PTT) on the corrosion of mild steel which is used in the industry-widely, in hydrochloric acid solution was investigated as electrochemically and qualitatively. Inhibition efficiency of 5PTT on mild steel surface was studied by EIS, potentiodynamic polarization, SEM and FTIR techniques. The experiments
openaire   +1 more source

ChemInform Abstract: Chemical Interactions Between 1,2,4‐Triazole‐3‐thiols and π‐ Acceptors.

ChemInform, 1994
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.
A. A. HASSAN, N. K. MOHAMED, Y. R. IBRAHIM, K. U. SADEK, A.‐F. E. MOURAD   +4 more
openaire   +1 more source