Ligand-Accelerated Cu-Catalyzed Azide−Alkyne Cycloaddition: A Mechanistic Report
作者:Valentin O. Rodionov、Stanislav I. Presolski、David Díaz Díaz、Valery V. Fokin、M. G. Finn
DOI:10.1021/ja072679d
日期:2007.10.1
Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) reaction was found to vary in complex ways with concentration, the presence of chloride ion, and the presence of accelerating ligands. Several examples of discontinuous ("threshold behavior") kinetics were observed, along with a decidedly nonlinear correlation of electronic substituent parameter with the rate of CuAAC reaction with p-substituted arylazides. The previously
[EN] COPPER-CATALYSED LIGATION OF AZIDES AND ACETYLENES<br/>[FR] LIGATION D'AZIDES ET D'ACETYLENES CATALYSEE PAR LE CUIVRE
申请人:SCRIPPS RESEARCH INST
公开号:WO2003101972A1
公开(公告)日:2003-12-11
A metal catalyzed click chemistry ligation process is employed to bind azides and terminal acetylenes to give triazoles. In many instances, the reaction sequence regiospecifically ligates azides and terminal acetylenes to give only 1,4-disubstituted [1,2,3]-triazoles.
Copper-catalysed ligation of azides and acetylenes
申请人:The Scripps Research Institute
公开号:EP2226316A1
公开(公告)日:2010-09-08
The present invention provides a process of catalyzing a click chemistry ligation reaction between a first reactant having a terminal alkyne moiety and second reactant having an azide moiety for forming a product having a triazole moiety, the click chemistry ligation reaction being performed in a solution in contact with metallic copper, said metallic copper contributing directly or indirectly to the catalysis of the click chemistry ligation reaction.
Copper(I)-Catalyzed Synthesis of Azoles. DFT Study Predicts Unprecedented Reactivity and Intermediates
作者:Fahmi Himo、Timothy Lovell、Robert Hilgraf、Vsevolod V. Rostovtsev、Louis Noodleman、K. Barry Sharpless、Valery V. Fokin
DOI:10.1021/ja0471525
日期:2005.1.1
Huisgen's 1,3-dipolar cycloadditions become nonconcerted when copper(l) acetylides react with azides and nitrile oxides, providing ready access to 1,4-disubstituted 1,2,3-triazoles and 3,4-disubstituted isoxazoles, respectively. The process is highly reliable and exhibits an unusually wide scope with respect to both components. Computational studies revealed a stepwise mechanism involving unprecedented metallacycle intermediates, which appear to be common for a variety of dipoles.