作者:Changwei Shao、Xinyan Wang、Jimin Xu、Jichen Zhao、Qun Zhang、Yuefei Hu
DOI:10.1021/jo101495k
日期:2010.10.15
presence of carboxylic acids and the latter two steps can be promoted significantly by carboxylic acids. Benzoic acid showed the best promotion activity, and the acids with strong chelating ability to Cu(I) ion could not serve for this purpose. Thus, the first carboxylic acid-promoted highly efficient CuAAC was established.
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。
Homogeneous and noncovalent immobilization of NHC-Cu catalyzed azide-alkyne cycloaddition reaction
作者:Xiangjie Zhang、Bingyang Wang、Yanmei Lu、Chungu Xia、Jianhua Liu
DOI:10.1016/j.mcat.2021.111452
日期:2021.3
reaction. Both were active in the two-component click cycloaddition reaction of terminalalkynes and organic azides and three-component cycloaddition reaction that employs various terminalalkynes, NaN3 and organic halides with the advantage of excellent yields, low catalyst dosage, short reaction time. The MWNTs@NHC-Cu catalyst could be separated from the reaction system at the end of the reaction and
Polymer anchored ruthenium complex: A highly active and recyclable catalyst for one-pot azide–alkyne cycloaddition and transfer-hydrogenation of ketones under mild conditions
作者:Rostam Ali Molla、Anupam Singha Roy、Kajari Ghosh、Noor Salam、Md Asif Iqubal、K. Tuhina、Sk Manirul Islam
DOI:10.1016/j.jorganchem.2014.11.007
日期:2015.1
catalyst. Aromatic ketones have been converted to their corresponding alcohols using the polymer supported Ru(III) catalyst. The effects of solvents, reaction time, catalyst amount for the azide–alkynecycloaddition reaction and transfer-hydrogenation reaction were studied. This catalyst showed excellent catalytic activity and recyclability. The polymer supported Ru(III) catalyst could be easily recovered
Polyvinyl alcohol-stabilized cuprous oxide particles: efficient and recyclable heterogeneous catalyst for azide–alkyne cycloaddition in water at room temperature
作者:Abdol Reza Hajipour、Fatemeh Mohammadsaleh
DOI:10.1007/s13738-015-0599-7
日期:2015.8
complex formation with OH groups, subsequently this PVA–Cu(II) macromolecular complex as a precursor reacted with ascorbic acid as a reducing agent at pH = 12 to obtain the PVA–Cu2O composite. The products were characterized using XRD, FE-SEM, FTIR, and UV–Visible techniques. The as-prepared PVA–Cu2O composite was applied as an effective and recyclable heterogeneous catalyst for 1,3-dipolar cycloaddition