一种新的非均相催化体系,包含三嗪基三齿铜 (II) -NNN -pincer 配合物,共价锚定在胺官能化二氧化硅包覆的 Fe 3 O 4磁性纳米粒子 Fe 3 O 4 @SiO 2 -NH-CCl-AT -Cu(II),合成。通过 FT-IR、NMR、EDX、TGA、FE-SEM、MAP 图像、XRD、ICP 和 N 2吸附-脱附等温线分析等标准方法对其结构进行了研究,并用于一锅法生产炔丙基胺3苯乙炔、醛和仲胺的偶联,TOF 值高达 40,000 h -1. 研究了各种溶剂、反应时间、温度、催化剂用量和催化剂可回收性的影响,以优化反应条件。催化剂被重新检查了五次,没有观察到明显的活性降低。
Copper–birhodanine complex immobilized on Fe
<sub>3</sub>
O
<sub>4</sub>
nanoparticles: DFT studies and heterogeneous catalytic applications in the synthesis of propargylamines in aqueous medium
作者:Manuchehr Rezaei、Khaled Azizi、Kamal Amani
DOI:10.1002/aoc.4120
日期:2018.3
Heterogeneous magnetic nanocatalyst, Fe3O4@SiO2–Ligand–Cu (II) MNPs, reveals high catalytic performance within the synthesis of propargylamines using the multicomponent coupling reaction of aldehydes, phenylacetylene and secondary amines in water as a solvent. The substantial feature of this organic–inorganic hybridmagnetic nanocatalyst is the capability of straightforward separation of the reaction
非均相磁性纳米催化剂Fe 3 O 4 @SiO 2-配体-铜(II)MNPs在醛基,苯乙炔和仲胺在水中作为溶剂的多组分偶联反应中,在炔丙基胺的合成中显示出较高的催化性能。这种有机-无机杂化磁性纳米催化剂的主要特征是能够通过外部磁体直接分离反应混合物,该磁体被回收十次而不会显着降低催化活性。这种方法还具有其他优势,例如服从于绿色化学原理,并且避免使用昂贵且有害的有机溶剂。为了研究Birhodanine衍生物-铜(II)配合物的稳定性和实际结构,还进行了DFT计算。
Metal- and catalyst-free, one-pot, three-component synthesis of propargylamines in magnetized water: experimental aspects and molecular dynamics simulation
Magnetized water (MW), as a green-promoting medium, is applied for the one-pot, metal- and catalyst-free, practical, efficient, and environmentally benign three-component reactions of aldehydes, amines, and alkynes. The salient features of this novel methodology are its simplicity, low cost, short reaction time, high reaction yield, easy work-up, and absence of hazardous organic solvents. Moreover
spectroscopic studies. Molecular structures of complexes 1, 2 and 4 were determined by X-ray crystallography. Copper complexes (1-4) were employed as a catalyst for the [3+2] cycloaddition and A3-couplingreactions. A mutual approach of salen-type ligands and metal via active participation of ligands allow to achieve the catalytic reactions. Reaction pathways were proposed and possible intermediate species
Three-Component Coupling of Aldehydes, Amines, and Alkynes Catalyzed by Oxidized Copper Nanoparticles on Titania
作者:María José Albaladejo、Francisco Alonso、Yanina Moglie、Miguel Yus
DOI:10.1002/ejoc.201200090
日期:2012.6
This work was generously supported by the Spanish Ministerio de Ciencia e Innovacion (MICINN) (grant numbers CTQ2007-65218, CTQ2011-24151), Consolider Ingenio (grant number 2010-CSD2007-00006), the Generalitat Valenciana (grant number PROMETEO/2009/039), and Fondos Europeos para el Desarrollo Regional (FEDER). Y. M. and M. J .A. acknowledge the ISO of the Universidad de Alicante for a grant.
这项工作得到了西班牙国家科学与创新部长 (MICINN)(授权号 CTQ2007-65218、CTQ2011-24151)、Consolider Ingenio(授权号 2010-CSD2007-00006)、Generalitat number Valenciana/g200 039) 和 Fondos Europeos para el Desarrollo Regional (FEDER)。YM 和 M.J.A. 承认阿利坎特大学的 ISO 的赠款。
Efficient three-component coupling catalysed by mesoporous copper–aluminum based nanocomposites
作者:Jana Dulle、K. Thirunavukkarasu、Marjo C. Mittelmeijer-Hazeleger、Daria V. Andreeva、N. Raveendran Shiju、Gadi Rothenberg
DOI:10.1039/c3gc36607c
日期:——
Traditional synthesis methods for propargylamines have several drawbacks. A recently developed alternative route is the so-called âA3 couplingâ in which an alkyne, an aldehyde, and an amine are coupled together. Typically, these reactions are catalysed by homogeneous gold salts, organogold complexes or silver salts. But these homogeneous catalysts are expensive and their separation is difficult. Here we report the discovery that solid Cu/Al/oxide mesoporous âspongesâ are excellent A3 coupling catalysts. These materials are robust, inexpensive, and easy to make. They give good to excellent yields (87â97%) for a wide range of substrates. Being heterogeneous, these catalysts are also easy to handle and separate from the reaction mixture, and can be recycled with no loss of activity.