Results 101 to 110 of about 12,017 (229)

Synthesis and Spectral Study of a New Family of 2,5-Diaryltriazoles Having Restricted Rotation of the 5-Aryl Substituent

open access: yesMolecules, 2020
Efficient synthesis of 2,5-diaryl substituted 4-azido-1,2,3-triazoles by the reaction of sodium azide with dichlorosubstituted diazadienes was demonstrated.
Biligma Tsyrenova, Valentine Nenajdenko
doaj   +1 more source

Crystal structure of 2-((3-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)-1-phenyl-1H-pyrazol-4-yl)methylene)-1H-indene-1,3(2H)-dione, C28H19N5O2 [PDF]

open access: yes, 2016
C28H19N5O2, monoclinic, Cc (no. 9), a = 13.9896(9) Å, b = 21.9561(14) Å, c = 7.1643(5) Å, β = 91.782(6)°, V = 2199.5(3) Å3, Z = 4, R gt(F) = 0.0632, wR ref(F 2) = 0.1727, T = 150(2) K.
Abdel-Wahab, Bakr F.   +4 more
core   +3 more sources

Flow Chemistry Meets Green Solvents: Telescoped Synthesis of Triazolyl Phosphoramidates and Phosphinamides in γ‐Valerolactone

open access: yesChemSusChem, Volume 19, Issue 9, 14 May 2026.
A telescoped three‐step continuous flow process enables the synthesis of organophosphorus 1,2,3‐triazoles in the biomass‐derived solvent γ‐valerolactone (GVL). The sequence integrates N‐phosphorylation, azidation, and Cu(I)‐catalyzed azide–alkyne cycloaddition (CuAAC), followed by in‐line copper removal, giving diverse triazoles in good to high overall
Viktória Gerő   +3 more
wiley   +1 more source

Azide–alkyne cycloaddition (click) reaction in biomass-derived solvent CyreneTM under one-pot conditions

open access: yesBeilstein Journal of Organic Chemistry
It was demonstrated that CyreneTM, as a biomass-originated polar aprotic solvent, could be utilized as an alternative reaction medium for one-pot copper(I)-catalyzed azide–alkyne cycloaddition (click or CuAAC) reactions, for the synthesis of various 1,2 ...
Zoltán Medgyesi, László T. Mika
doaj   +1 more source

Combined XRD-paramagnetic 13C NMR spectroscopy of 1,2,3-triazoles for revealing copper traces in a Huisgen click-chemistry cycloaddition. A model case

open access: yesHeterocyclic Communications, 2019
Copper-catalyzed Alkyne-Azide Cycloaddition (CuAAC) click chemistry robustness has been demonstrated over recent years to produce 1,2,3-triazoles with excellent yields at mild conditions with simple purification methods.
Canseco-González Daniel   +2 more
doaj   +1 more source

Synthetic chemistry and biological activity of pentafluorosulphanyl (SF5) organic molecules [PDF]

open access: yes, 2012
Acknowledgements We thank the European Commission for financial support (Industry Academia Partnerships and Pathways project “PET BRAIN”, Contract No 251482). S.A.
Altomonte, Stefano, Zanda, Matteo
core   +1 more source

Dual Ligand‐Enabled Nondirected C─H Olefination of (Hetero)Arenes for the Synthesis of Clickable Derivatives

open access: yesChemistry – A European Journal, Volume 32, Issue 15, 22 April 2026.
We report an efficient method for late‐stage installation of “clickable” alkyne groups into diverse (hetero)arenes. Using a dual‐ligand palladium catalyst that combines an NASA ligand with an N‐heterocycle, an acrylate unit bearing a terminal alkyne can be introduced via nondirected C─H activation.
Tommaso Braga   +2 more
wiley   +1 more source

β‐Mannosyl Triazoles as Mimics of Galactosyl Galectin‐3 and Galectin‐9 N‐Terminal Domain Inhibitors

open access: yesChemBioChem, Volume 27, Issue 7, 14 April 2026.
Galacto‐mimicking mannosyl monotriazoles, but not bis‐triazoles, inhibit galectin‐3 and galectin‐9 N‐terminal domain. Mannosyl β‐C‐1 amidotriazoles have previously been reported to have higher selectivity for galectin‐9N (N‐terminal domain) than the corresponding galactoside C3 amidotriazoles have, which were more selective for galectin‐3.
Fredrik Sjövall, Ulf J. Nilsson
wiley   +1 more source

Insulin-like Growth Factor 1 Analogs Clicked in the C Domain : Chemical Synthesis and Biological Activities [PDF]

open access: yes, 2017
Human insulin-like growth factor 1 (IGF-1) is a 70 amino acid protein hormone, with key impact on growth, development, and lifespan. The physiological and clinical importance of IGF-1 prompted challenging chemical and biological trials toward the ...
Andrzej M. Brzozowski   +11 more
core   +2 more sources

“Click” Synthesis of Nonsymmetrical Bis(1,2,3-triazoles)

open access: yesOrganic Letters, 2010
Unsymmetrically 1,1'-disubstituted 4,4'-bis-1H-1,2,3-triazoles 4 have been prepared from 4-ethynyl-1,2,3-triazoles 5 and azides. Following a "double-click" strategy, two complementary approaches were implemented for the preparation of the key 4-ethynyltriazole intermediates 5: (a) the stepwise Swern oxidation/Ohira-Bestman alkynylation of readily ...
Aizpurua, Jesús M.   +5 more
openaire   +3 more sources

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