An easy-to-prepare, reusable and versatile catalyst consisting of oxidised copper nanoparticles on activated carbon has been fully characterised and found to effectively promote the multicomponent synthesis of 1,2,3-triazoles from organic halides, diazonium salts, and aromatic amines in water at a low copper loading.
Phosphoramidite accelerated copper(i)-catalyzed [3 + 2] cycloadditions of azides and alkynes
作者:Lachlan S. Campbell-Verduyn、Leila Mirfeizi、Rudi A. Dierckx、Philip H. Elsinga、Ben L. Feringa
DOI:10.1039/b822994e
日期:——
Monodentate phosphoramidite ligands are used to accelerate the copper(i)-catalyzed 1,3-dipolar cycloaddition of azides and alkynes (CuAAC) rapidly yielding a wide variety of functionalized 1,4-disubstituted-1,2,3-triazoles; Cu(i) and Cu(ii) salts both function as the copper source in aqueous solution to provide excellent yields.
An Organocatalytic Azide-Aldehyde [3+2] Cycloaddition: High-Yielding Regioselective Synthesis of 1,4-Disubstituted 1,2,3-Triazoles
作者:Dhevalapally B. Ramachary、Adluri B. Shashank、S. Karthik
DOI:10.1002/anie.201406721
日期:2014.9.22
An organocatalyticazide–aldehyde [3+2] cycloaddition (organo‐click) reaction of a variety of enolizable aldehydes is reported. The organo‐click reaction is characterized by a high rate and regioselectivity, mild reaction conditions, easily available substrates with simple operation, and excellent yields with a broad spectrum of substrates. It constitutes an alternative to the previously known CuAAC
An Efficient Copper-Catalyzed One-Pot Synthesis of 1-Aryl-1,2,3-triazoles from Arylboronic Acids in Water under Mild Conditions
作者:Changbo Hao、Changjian Zhou、Jianwei Xie、Jie Zhang、Ping Liu、Bin Dai
DOI:10.1002/cjoc.201500643
日期:2015.11
A convenient method for one‐pot two‐step 1,3‐dipolar cycloadditon reaction of arylboronic acid, sodium azide followed with terminal alkynes in the presence of 2‐pyrrolecarbaldiminato‐Cu(II) complexes catalyst is reported. Various 1‐aryl‐1,2,3‐triazoles were prepared in 63%–97% yields in water at 30°C without any additives and avoiding the isolation of unstable aryl azides.
Aqueous bile salt accelerated cascade synthesis of 1,2,3-triazoles from arylboronic acids
作者:Anirban Garg、Abdul Aziz Ali、Krishnaiah Damarla、Arvind Kumar、Diganta Sarma
DOI:10.1016/j.tetlet.2018.09.064
日期:2018.11
A facile, efficient and mild copper catalyzed strategy for cascade synthesis of various 1,4-disubstituted 1,2,3-triazoles from arylboronic acids, sodium azide and alkynes was developed by using aqueous bile salt NaDC solution as an accelerating medium. Low catalyst loading (only 1 mol% Cu source was sufficient for in situ generation of azide followed by azide–alkyne coupling), green solvent, use of