Results 141 to 150 of about 14,929 (209)

Synthesis of 1,2,4-triazole-3-thiols and their S-substituted derivatives

Russian Journal of Organic Chemistry, 2010
New 1,2,4-triazole-3-thiols were synthesized by reactions of the corresponding carboxylic acid hydrazides with isothiocyanates and subsequent cyclization of intermediate 1,4-substituted thiosemicarbazides. Alkylation of 1,2,4-triazole-3-thiols with benzyl chlorides and bromacetophenones gave only S-substituted derivatives.
T. V. Kochikyan, M. A. Samvelyan, V. S. Arutyunyan, A. A. Avetisyan, R. A. Tamazyan, A. G. Aivazyan   +5 more
openaire   +1 more source

Alkylation of 1,2,4-triazole-3-thiols with haloalkanoic acid esters

Russian Journal of Organic Chemistry, 2017
Alkylation of 4,5-disubstituted 4H-1,2,4-triazole-3-thiols with methyl chloroformate and ethyl chloroacetate chemoselectively afforded the corresponding S-alkyl derivatives, whereas the alkylation of 5-benzyl-4-phenyl-4H-1,2,4-triazole-3-thiol with methyl 3-bromopropanoate gave an inseparable mixture of S- and N-alkylation products. Hydrazinolysis of S-
M. A. Samvelyan, T. V. Ghochikyan, S. V. Grigoryan, R. A. Tamazyan, A. G. Aivazyan   +4 more
openaire   +1 more source

Voltammetric determination and electrochemical behavior of vanillin based on 1H-1,2,4-triazole-3-thiol polymer film modified gold electrode.

Food Chemistry, 2020
Poly(1H-1,2,4-triazole-3-thiol) (poly(T3T)) conductive film was coated successfully on the gold electrode (Au). The electrochemical behavior of vanillin (VAN) was studied on the 1H-1,2,4-triazole-3-thiol-Au (T3T-Au) electrode.
Tuğba Tabanlıgil Calam
semanticscholar   +1 more source

Analytical application of the poly(1H-1,2,4-triazole-3-thiol) modified gold electrode for high-sensitive voltammetric determination of catechol in tap and lake water samples

International Journal of Environmental Analytical Chemistry, 2019
In this work, a simple, sensitive and rapid method for the determination of trace amounts of catechol (CT) in aqueous media has been suggested. For this purpose, poly(1H-1,2,4-triazole-3-thiol) film was electrochemically deposited successfully at the ...
Tuğba Tabanlıgil Calam
semanticscholar   +1 more source

Alkylation and aminomethylation of new 4,5-Substituted 4H-1,2,4-Triazole-3-thiols

Russian Journal of Organic Chemistry, 2013
We previously synthesized 5-[alkoxyphenyl(alkoxyphenethyl, benzofuryl)]-4-phenyl(allyl)-4H-1,2,4triazole-3-thiols some of which (specifically Nand S-substituted derivatives) were found to exhibit antitumor activity [1]. While continuing studies in this line, we tried to find new efficient compounds among substituted 1,2,4-triazole-3-thiols and reveal a
M. A. Kaldrikyan, N. S. Minasyan, R. G. Melik-Ogandzhanyan   +2 more
openaire   +1 more source

Synthesis of some novel 4-amino-4H-1,2,4-triazole-3-thiol derivatives

Journal of the Iranian Chemical Society
Mai M. Khalaf, Hany M. Abd El-Lateef, Amer Anwar Amer, Amr Hassan Moustafa   +3 more
openaire   +2 more sources

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

ChemInform Abstract: Synthesis of 1,2,4‐Triazole‐3‐thiols and Their S‐Substituted Derivatives.

ChemInform, 2010
AbstractNew triazolethiols (IV) are synthesized via alkali‐mediated cyclization of 1,4‐disubstituted thiosemicarbazides (III).
T. V. Kochikyan, M. A. Samvelyan, V. S Arutyunyan, A. A. Avetisyan, R. A. Tamazyan, A. G. Aivazyan   +5 more
openaire   +1 more source

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 Hussein
exaly   +2 more sources

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