合成了一系列离子液体,并研究了它们对 Cu 催化的一锅法 A 3偶联反应合成炔丙胺的协同作用。结果表明,基于离子液体[MEA][H 2 PO 4的复合催化体系]和CuI对目标炔丙胺具有优异的催化活性和选择性,一系列具有吸电和给电基团的芳香醛和杂芳醛均能达到良好至优异的分离产率。该催化体系反应条件温和,操作程序简单,不涉及挥发性有机溶剂和其他添加剂,也不需要惰性气体保护。此外,该工作中使用的离子液体易于制备,其利用使催化体系可回收。所有这些优势使得该催化体系高效且环保地用于炔丙胺的合成。 图形概要
Two original macrocyclic silver(I)(pyridine-containing ligand) complexes [Ag(I)(Pc-L)] were synthesized and characterized. Their ability to catalyze the coupling among aldehydes, terminal alkynes and amines (A3-coupling) was demonstrated. The reaction could be performed under conventional as well as dielectric heating. The catalysts were effective in both cases, but dielectric heating allowed a lower
Copper nanoparticles supported on graphene as an efficient catalyst for A<sub>3</sub>coupling of benzaldehydes
作者:Sana Frindy、Abdelkrim El Kadib、Mohamed Lahcini、Ana Primo、Hermenegildo García
DOI:10.1039/c5cy01414j
日期:——
Cu nanoparticles (NPs) supported on graphene (G) obtained by pyrolysis of alginate is a highly active catalyst for the A3 coupling of aldehydes, secondary amines and terminal acetylenes. Adsorption of Cu NPs previously formed by the polyol method onto dispersed G in ethylene glycol was found a suitable procedure for the preparation of a highly active catalyst. Cu/G undergoes gradual deactivation upon
The reported Cu(II) metal–organic cage (Cu3L2, 1) can be a highly active reusable catalyst to homogeneously catalyze the A3-coupling reaction in CHCl3 and can be heterogeneously recovered by simply adding 1,4-dioxane via formation of the insoluble metal–organicframework (Cu3L2(1,4-dioxane)1.5, 2).
Synthesis of silver complexes with chelating bidentate
<i>N</i>
‐heterocyclic ligands, their application in catalytic A
<sup>3</sup>
coupling, and as antimicrobial agents
作者:Miguel Mateus、Anita Kiss、Ivana Císařová、Tomasz M. Karpiński、Lukas Rycek
DOI:10.1002/aoc.6994
日期:2023.4
We present a synthesis of novel silver complexes stabilized by bidentate ligands based on N-heterocyclic carbenes (NHC) linked with a bisamide linker. The ligand stabilizes the silver ion in a rare chelating mode. The synthesis of the complex depends on the equimolar ratio of the silver source and the ligand precursor. In case the excess of the silver source is used, the reaction leads to the formation
A sulfonate-based Cu(I) metal-organic framework as a highly efficient and reusable catalyst for the synthesis of propargylamines under solvent-free conditions
作者:Peng Li、Sridhar Regati、Hui-Cai Huang、Hadi D. Arman、Bang-Lin Chen、John C.-G. Zhao
DOI:10.1016/j.cclet.2014.10.022
日期:2015.1
A new highly efficient and reusable Cu(I)-MOF has been developed for the synthesis of propargylamine compounds via the three-component reaction of secondary amines, alkynes, and aromatic aldehydes under solvent-free conditions. The desired propargylamines were obtained in good to excellent yields with a low catalyst loading. The catalyst may be recovered and reused for up to 5 cycles without major loss of activity. This protocol has the advantages of excellent yields, low catalyst loading, and catalyst recyclability. (C) 2014 Bang-Lin Chen and John C.-G. Zhao. Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. All rights reserved.