Results 21 to 30 of about 45,965 (323)

A catalytic cycle for oxidation of tert-butyl methyl ether by a double C−H activation-group transfer process [PDF]

, 2008
A square-planar, iridium(I) carbene complex is shown to effect atom and group transfer from nitrous oxide and organic azides, releasing the corresponding formate or formimidate and an iridium(I)−dinitrogen adduct.
Grubbs, Robert H., Whited, Matthew T.
core   +2 more sources

Regioselective synthesis of heterocyclic N-sulfonyl amidines from heteroaromatic thioamides and sulfonyl azides

Beilstein Journal of Organic Chemistry, 2020
N-Sulfonyl amidines bearing 1,2,3-triazole, isoxazole, thiazole and pyridine substituents were successfully prepared for the first time by reactions of primary, secondary and tertiary heterocyclic thioamides with alkyl- and arylsulfonyl azides.
Vladimir Ilkin, Vera Berseneva, Tetyana Beryozkina, Tatiana Glukhareva, Lidia Dianova, Wim Dehaen, Eugenia Seliverstova, Vasiliy Bakulev   +7 more
doaj   +1 more source

Synthesis of 1,4-Disubstituted Mono and Bis-triazolocarbo-acyclonucleoside Analogues of 9-(4-Hydroxybutyl)guanine by Cu(I)-Catalyzed Click Azide-Alkyne Cycloaddition [PDF]

, 2011
A series of novel mono-1,2,3-triazole and bis-1,2,3-triazole acyclonucleoside analogues of 9-(4-hydroxybutyl)guanine was prepared via copper(I)-catalyzed 1,3-dipolar cycloaddition of N-9 propargylpurine, N-1-propargylpyrimidines/as-triazine with the ...
Engels, Joachim W., Krim, Jamal, Taourirte, Mohamed   +2 more
core   +2 more sources

Chemical Activation in Azide and Nitrene Chemistry: Methyl Azide, Phenyl Azide, Naphthyl Azides, Pyridyl Azides, Benzotriazoles, and Triazolopyridines [PDF]

Australian Journal of Chemistry, 2013
Chemical activation (the formation of ‘hot’ molecules due to chemical reactions) is ubiquitous in flash vacuum thermolysis (FVT) reactions, and awareness of this phenomenon is indispensable when designing synthetically useful gas-phase reactions. Chemical activation is particularly prevalent in azide chemistry because the interesting singlet nitrenes ...
openaire   +4 more sources

Taming tosyl azide: the development of a scalable continuous diazo transfer process [PDF]

, 2016
Heat and shock sensitive tosyl azide was generated and used on demand in a telescoped diazo transfer process. Small quantities of tosyl azide were accessed in a one pot batch procedure using shelf stable, readily available reagents. For large scale diazo
Collins, SG, Crowley, DC, Deadman, BJ, Lynch, D, Maguire, AR, O'Mahony, RM   +5 more
core   +1 more source

Synthesis of Alkaline Earth Diazenides MAEN2 (MAE = Ca, Sr, Ba) by Controlled Thermal Decomposition of Azides under High Pressure [PDF]

, 2012
The alkaline earth diazenides MAEN2 with MAE = Ca, Sr and Ba were synthesized by a novel synthetic approach, namely, a controlled decomposition of the corresponding azides in a multianvil press at highpressure/ high-temperature conditions.
Andersen O. K., Auffermann G., Auffermann G., Auffermann G., Auffermann G., Bergmann J., Chen W., Chen Z. W., Chhowalla M., Coelho A. A., Crowhurst J. C., Crowhurst J. C., Dronskowski R., Du X. P., Ehrlich P., Fair H. D., Frierson W. J., Gregoryanz E., Huppertz H., Jepsen O., Jhi S. H., Kawai N., Lambrecht W. R. L., Leineweber A., Maruyama T., McMillan P. F., Montoya J. A., Prots Y., Rainer Frankovsky, Remy-Gennete P., Rubie D. C., Römer S. R., Sebastian B. Schneider, Skriver H. L., Vajenine G. V., von Appen J., Walker D., Walker D., Wang H., Weidlein J., Wessel M., Wessel M., Wessel M., Wolfgang Schnick, Wu Z. G., Yamanaka S., Young A. F., Yu R., Zerr A.   +48 more
core   +1 more source

Divergent synthesis of chiral cyclic azides via asymmetric cycloaddition reactions of vinyl azides

Nature Communications, 2019
Vinyl azides generally act as 3-atom synthon through the fast release of molecular nitrogen, whereas keeping the azide group intact is more challenging. Here, the authors show a copper-catalyzed enantioselective cycloaddition of two types of vinyl azides
Nuligonda Thirupathi, Fang Wei, Chen-Ho Tung, Zhenghu Xu   +3 more
doaj   +1 more source

Overview of 1,5-Selective Click Reaction of Azides with Alkynes or Their Synthetic Equivalents

Molecules, 2023
Nowadays, the click reaction of azides with alkynes has evolved rapidly and become one of the most efficient methods to synthesize 1,2,3-triazoles, which are an important class of N-containing heterocycles.
Yaqi Zhao, Zhengqi Chai, Qingrui Zeng, Wen-Xiong Zhang   +3 more
doaj   +1 more source

Huisgen-based conjugation of water-soluble porphyrins to deprotected sugars: Towards mild strategies for the labelling of glycans [PDF]

, 2014
Fully deprotected alkynyl-functionalised mono- and oligosaccharides undergo CuAAC-based conjugation with water-soluble porphyrin azides in aqueous environments.
Boyle, Ross W., Bryden, Francesca, Daly, Robin, Giuntini, Francesca, Scanlan, Eoin M.   +4 more
core   +1 more source

Construction of Benzenesulfonamide Derivatives via Copper and Visible Light-induced Azides and S(O)₂–H Coupling

Molecules, 2022
We here have developed an S(O)2–N coupling between phenylsulfinic acid derivatives and aryl azides by dual copper and visible light catalysis. In this efficient and mild pathway, the reaction produces sulfonamide compounds under redox-neutral condition ...
Zhipeng Liang, Ya-Nan Wu, Yang Wang
doaj   +1 more source