Metallic copper wire: a simple, clear and reusable catalyst for the CuAAC reaction in supercritical carbon dioxide
作者:Yuqin Jiang、Xing He、Weiwei Zhang、Xingfeng Li、Niu Guo、Yaru Zhao、Guiqing Xu、Wei Li
DOI:10.1039/c5ra11797f
日期:——
Relatively mild conditions, easy work-up and a simple purification; the stable and easily obtained catalyst presented here could be reused for more than 200 cycles for a 10 cm length of copper wire.
protocol for the synthesis of 1,4-disubstituted1,2,3-triazoles from azides and arylacetaldehydes at room temperature was developed using [bmim]PF6/KOH as the reaction medium. It was found that the in situ-generated carbene from [bmim]PF6/KOH acted as the catalyst. In the absence of a transition-metal catalyst and organic solvent, this azide–arylacetaldehyde [3 + 2] cycloaddition proceeds efficiently
Cu(OAc)<sub>2</sub>·H<sub>2</sub>O/NH<sub>2</sub>NH<sub>2</sub>·H<sub>2</sub>O: an efficient catalyst system that in situ generates Cu<sub>2</sub>O nanoparticles and HOAc for Huisgen click reactions
A combination of Cu(OAc)2·H2O and NH2NH2·H2O, which in situ generates Cu2O-NPs and HOAc in water at room temperature, has been developed as a highly efficient catalytic system for Huisgen click reactions. Our results indicate that the in situ generated Cu2O-NPs and HOAc play important roles in the Huisgen click reaction.