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.
Pyridinyl-triazole ligand systems for highly efficient CuI-catalyzed azide-alkyne cycloaddition
作者:Lei Zheng、Ye Wang、Xianggao Meng、Yunfeng Chen
DOI:10.1016/j.catcom.2020.106165
日期:2021.1
N1/N2-substituted 2-(NH-1,2,3-triazol-4-yl)pyridines) were found to be superior ligands for CuI-catalyzed azide-alkyne cycloaddition (CuAAC) reactions. Low catalyst loadings, short reaction times, facile catalyst recyclability, ambient temperature, and open-flask conditions made this catalytic system very practical. The iodide anions could form iodine bridges to construct stable dinuclear Cu(I) complexes with these
吡啶基-三唑配体系统(包括N 2 -2-吡啶基1,2,3-三唑和N 1 / N 2取代的2-(NH(1,2,3-三唑-4-基)吡啶被发现是CuI催化的叠氮化物-炔烃环加成(CuAAC)反应的优良配体。催化剂负载量低,反应时间短,催化剂易于回收利用,环境温度和开瓶条件使该催化系统非常实用。碘化物阴离子可形成碘桥,与这些配体一起构建稳定的双核Cu(I)配合物,这是实现高催化活性的关键。虽然CuBr和CuCl不适合该配体系统,因为Br和Cl原子的尺寸不合适,无法形成相应的双核Cu(I)配合物。
Tandem Catalysis: From Alkynoic Acids and Aryl Iodides to 1,2,3-Triazoles in One Pot
作者:Andrej Kolarovič、Michael Schnürch、Marko D. Mihovilovic
DOI:10.1021/jo1024927
日期:2011.4.15
A tandem catalysis protocol based on decarboxylative coupling of alkynoic acids and 1,3-dipolar cycloaddition of azides enables a highly efficient synthesis of a variety of functionalized 1,2,3-triazoles. The three-step, one-pot method avoids usage of gaseous or highly volatile terminal alkynes, reduces handling of potentially unstable and explosive azides to a minimum, and furnishes target structures in excellent yields and a very good purity without the need for additional purification.