Copper(I) oxide and benzoic acid ‘on water’: a highly practical and efficient catalytic system for copper(I)-catalyzed azide–alkyne cycloaddition
作者:Changwei Shao、Rui Zhu、Sheng Luo、Qun Zhang、Xinyan Wang、Yuefei Hu
DOI:10.1016/j.tetlet.2011.05.061
日期:2011.7
A simple combination of Cu2O and PhCO2H 'on H2O' has been developed as a highly practical and efficient catalytic system for copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC). It not only provides a further evidence for the strategy of carboxylic acids-promoted CuAAC, but also offers significant advantages to CuAAC because Cu2O is one of the most stable and cheapest Cu(I) sources; PhCO2H is one of the structurally simplest bidentate ligands; and water is the most 'green' solvent. (C) 2011 Elsevier Ltd. All rights reserved.
作者:Changwei Shao、Xinyan Wang、Qun Zhang、Sheng Luo、Jichen Zhao、Yuefei Hu
DOI:10.1021/jo200869a
日期:2011.8.19
In this novel acid–base jointly promoted CuAAC, the combination of CuI/DIPEA/HOAc was developed as a highly efficient catalytic system. The functions of DIPEA and HOAc have been assigned, and HOAc was recognized to accelerate the conversions of the C–Cu bond-containing intermediates and buffer the basicity of DIPEA. As a result, all drawbacks occurring in the popular catalytic system CuI/NR3 were overcome
在这种新型的酸碱共同促进的CuAAC中,CuI / DIPEA / HOAc的结合被开发为一种高效的催化体系。已经指定了DIPEA和HOAc的功能,HOAc被认为可以加速含C–Cu键的中间体的转化并缓冲DIPEA的碱性。结果,容易克服了流行的催化体系CuI / NR 3中发生的所有缺点。