Results 11 to 20 of about 12,877,669 (294)

1‑Iodobuta-1,3-diynes in Copper-Catalyzed Azide–Alkyne Cycloaddition: A One-Step Route to 4‑Ethynyl-5-iodo-1,2,3-triazoles

, 2019
Cu-catalyzed 1,3-dipolar cycloaddition of iododiacetylenes with organic azides using iodotris­(tri­phenyl­phos­phine)­copper­(I) as a catalyst was found to be an efficient one-step synthetic route to 5-iodo-4-ethynyltriazoles. The reaction is tolerant to
Anastasia I. Govdi (6282167), Alexander V. Ponomarev (6282170), Natalia A. Danilkina (4859905), Irina A. Balova (1589626)   +3 more
core   +4 more sources

Synthesis and antibacterial evaluation of sulfonamide bridged disubstituted 1,2,3-triazoles

, 2022
In the present study, a series of sulfonamide bridged 1,4-disubstituted 1,2,3-triazoles have been synthesized in good yield via click reaction between sulfonamide linked terminal alkynes and in situ prepared 2/3/4-azidobenzenesulfonamides.
C. P. Kaushik (7494545), Archna Yadav (14093689)   +1 more
core   +1 more source

Access to Fluoroalkylated Azoles and 2Acylaminoketones via Fluorinated Anhydride-Mediated Cleavage of NH-1,2,3-Triazoles

, 2022
NH-1,2,3-Triazoles undergo a ring cleavage in reactions with fluorinated acid anhydrides (trifluoroacetic, difluoroacetic, chlorodifluoroacetic, and pentafluoropropionic anhydrides) by nitrogen acylation and acid-mediated triazole ring opening ...
Petr Beier (1748218), Vladimir Motornov, Petr Beier, Vladimir Motornov (6052604)   +3 more
core   +1 more source

Metal-Free Synthesis of 1,5-Disubstituted 1,2,3-Triazoles

, 2021
A three-component synthesis of 1,5-disubstituted 1,2,3-triazoles from α-acetyl-α-diazomethane sulfonamides, primary aliphatic amines, and aromatic aldehydes is presented.
Mikhail Krasavin, Ksenia Malkova (11730979), Mikhail Krasavin (820851), Andrey Bubyrev (11425511), Andrey Bubyrev, Grigory Kantin (6448364), Grigory Kantin, Ksenia Malkova, Dmitry Dar’in, Dmitry Dar’in (1555282)   +9 more
core   +1 more source

Catalytic Asymmetric Synthesis of Atropisomeric N‑Aryl 1,2,4-Triazoles

, 2023
The atroposelective synthesis of N-aryl 1,2,4-triazoles was developed. A cyclodehydration reaction was rendered asymmetric with the use of a chiral phosphoric acid catalyst to afford atropisomeric N-aryl 1,2,4-triazoles in up to 91:9 er ...
Sooyun Choi (13103816), Scott J. Miller (1308798), Gavin M. Coombs (14515186), Melody C. Guo (14515183), Sooyun Choi, Gavin M. Coombs, Melody C. Guo, Scott J. Miller   +7 more
core   +2 more sources

Regioselectivity in the Thermal Rearrangement of Unsymmetrical 4-Methyl-4H-1,2,4-triazoles to 1-Methyl-1H-1,2,4-triazoles

Molecules, 2001
The rearrangement of 4-methyl-3,5-diaryl-4H-1,2,4-triazoles to the corresponding 1-methyl-3,5-diaryl-1H-1,2,4-triazoles showed regioselectivity comparable to that observed for the alkylation of 3,5-diaryl-1H-1,2,4-triazoles.
Per H.J. Carlsen, Odd R. Gautun
doaj   +1 more source

Generation of Functionalized Azepinone Derivatives via a (4 + 3)-Cycloaddition of Vinyl Ketenes and Imino Carbenes Derived from NSulfonyl-triazoles

, 2022
An intermolecular RhII-catalyzed, formal (4 + 3)-cycloaddition between vinyl ketenes and N-sulfonyl-1,2,3-triazoles for the construction of azepinone products is described.
Brandon L. Ashfeld (1701802), Zachary D. Tucker, Zachary D. Tucker (12114035), Katelyn A. Wendt, Kevin X. Rodriguez, Harrison M. Hill, Harrison M. Hill (12114032), Katelyn A. Wendt (12114038), Kevin X. Rodriguez (2058499), Brandon L. Ashfeld   +9 more
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3-Aryl Substituted Triazole Derivatives as New and Effective Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution

International Journal of Electrochemical Science, 2012
The corrosion inhibition properties of three triazoles derivatives namely 4-amino-5-phenyl-4H-1, 2, 4,-triazole-3-thiol (APTT), 4-amino-5-(2-hydroxy) phenyl-4H-1, 2, 4,-triazole-3-thiol, (AHPTT), 4-amino-5-styryl-4H-1, 2, 4,-triazole-3-thiol, (ASTT) on ...
M.A. Quraishi, Sudheer, K.R. Ansari, Eno E. Ebenso   +3 more
doaj   +1 more source

Synthesis of 1‑Cyanoalkynes and Their Ruthenium(II)-Catalyzed Cycloaddition with Organic Azides to Afford 4‑Cyano-1,2,3-triazoles

, 2018
A new method to convert terminal alkynes under relatively mild conditions to 1-cyanoalkynes using in situ formed cyanogen is described. 1-Cyanoalkynes have a higher reactivity than terminal alkynes in the ruthenium­(II)-catalyzed regiospecific azide ...
Peiye Liu (3226191), Ronald J. Clark (547893), Lei Zhu (16642)   +2 more
core   +2 more sources

5-Formyltriazoles as Valuable Starting Materials for Unsymmetrically Substituted Bi-1,2,3-Triazoles

Frontiers in Chemistry, 2020
Herein, we present the first synthetic methodologies toward non-symmetrical 5,5′-C, C-linked bi-1,2,3-triazoles starting from 5-formyl-1,2,3-triazole via two related pathways.
Robby Vroemans, Tomas Horsten, Maarten Van Espen, Wim Dehaen   +3 more
doaj   +1 more source