Highly active binuclear Cu(II) catalyst bearing an unsymmetrical bipyridine-pyrazole-amine ligand for the azide-alkyne cycloaddition reaction
作者:Baofeng Han、Xiao Xiao、Lan Wang、Wenjing Ye、Xiaoping Liu
DOI:10.1016/s1872-2067(15)61121-4
日期:2016.9
groups often show special characteristics. In this paper, a well-defined dinuclear Cu (Ⅱ) complex bearing an unsymmetrical bipyridine-pyrazole-amine ligand was synthesized by the condensation of N-H to release H 2 O. Using sodium L-ascorbate as a reductant, the binuclear complex showed excellent activity in 1,3-dipolar cycloaddition reactions between alkynes and azides to obtain 1,4-disubstituted triazoles
含有NH基团的配体通常表现出特殊的特性。在本文中,通过NH 缩合释放H 2 O 合成了带有不对称双吡啶-吡唑-胺配体的明确定义的双核Cu (II) 配合物。使用L-抗坏血酸钠作为还原剂,该双核配合物表现出优异的性能。在炔烃和叠氮化物之间的 1,3-偶极环加成反应中的活性,以 95%-99% 的分离产率获得 1,4-二取代的三唑。
Ruthenium-Catalyzed Alkenylation of Arenes with Alkynes or Alkenes by 1,2,3-Triazole-Directed C-H Activation
作者:Xing Guang Li、Kai Liu、Gang Zou、Pei Nian Liu
DOI:10.1002/ejoc.201402938
日期:2014.12
The ruthenium-catalyzedalkenylation of arenes with alkynes or alkenes has been achieved by using 1,2,3-triazole as the directing group for the C–Hactivation. With [Ru(p-cymene)Cl2]2 as the catalyst and Cu(OAc)2·H2O and AgSbF6 as additives, various triazole-substituted arenes reacted readily with a range of internal alkynes or terminal alkenes to afford di- or monoalkenylated arenes with high regioselectivity
Synthesis of Mono- and Binuclear Cu(II) Complexes Bearing Unsymmetrical Bipyridine–Pyrazole–Amine Ligand and Their Applications in Azide–Alkyne Cycloaddition
作者:Wenjing Ye、Xiao Xiao、Lan Wang、Shicheng Hou、Chun Hu
DOI:10.1021/acs.organomet.7b00154
日期:2017.6.12
Mono- and binuclear Cu(II) complexes bearing an unsymmetrical bipyridine–pyrazole–amine ligand were synthesized and characterized using X-ray diffraction. The mononuclear complex could be converted to the corresponding binuclearcomplexes under basic conditions due to the lability of the pyrazolyl N–H. Both complexes proved to be effective catalysts for azide–alkyne cycloaddition to form triazoles
Multicomponent azide–alkyne cycloaddition catalyzed by impregnated bimetallic nickel and copper on magnetite
作者:Juana M. Pérez、Rafael Cano、Diego J. Ramón
DOI:10.1039/c4ra03149k
日期:——
Multicomponent azide–alkyne cycloaddition catalyzed by impregnated bimetallic nickel and copper on magnetite.
多组分叠氮-炔炔环加成在磁铁矿上由浸渍的双金属镍和铜催化。
Zn/C-Catalyzed Cycloaddition of Azides and Aryl Alkynes
作者:Xu Meng、Xiaoyun Xu、Tingting Gao、Baohua Chen
DOI:10.1002/ejoc.201000610
日期:——
Charcoal impregnated with zinc was able to catalyze the cycloaddition of organic azides and alkynes to provide the corresponding 1,4-disubstituted 1,2,3-triazoles and 1,4,5-trisubstituted 1,2,3-triazoles in good to excellent yields. Noteworthy was that the novel and heterogeneous catalyst was successfully applied in this cycloaddition reaction for the first time and could also be easily recycled.