Fabrication of Bimetallic Ag‐Co Nanoparticle Deposited on Hierarchical ZSM‐5 as a Selective Catalyst for Synthesis of Propargylamine in Water via Multicomponent A₃ Coupling

Abstract

Alloying nanoparticle is a method to adjust the surface properties of catalysts so as to enhance catalytic performances of them and they usually exhibit outstanding characteristics which are disparate from monometallic nanoparticles. In this regard, a bimetallic catalyst based on sliver and cobalt nanoparticles incorporated in the structure of hierarchical ZSM-5 (Hi-ZSM-5) was produced. This novel catalyst was simply produced through simultaneous chemical reduction of silver and cobalt ions in the presence of Hi-ZSM-5. The solid support (Hi-ZSM-5) has played a highly crucial part in this catalyst because it offers a high surface area for deposition of nanoparticles as active sites and facilitates diffusion of reactants by its mesopores. The catalytic aspects of AgÀ Co/Hi-ZSM-5 were examined in A 3 coupling reaction of amine, aldehyde, acetylene in water media and impacts of different reaction parameters were extensively investigated. Outperforming both monometallic counterparts, the catalyst was found highly selective, stable and recoverable in the reaction and it did not show any sign of chemical or morphological alterations after 5 runs. The chemical composition and morphological properties of the catalyst were evaluated by XRD, BET, SEM-EDS, TEM, DRS-UV and ICP-AES techniques.

DABCO-based ionic liquid-modified magnetic nanoparticles supported gold as an efficient catalyst for A3 coupling reaction in water

“…5 However, in recent years, an efficient and simple method for the construction of propargylamines is based on a three component reaction of aldehyde, amine and alkynes using C-H bond activation of alkynes mediated by transition metals (A 3 -coupling reaction) . 6 Different transition metals such as Copper, 7 Zinc, 8 Silver, 9 Iron, 10 Nickel, 11 Cobalt, 12 Manganese, 13 Iridium, 14 Indium, 15 Silver-Cobalt, 16 and Copper-Zinc-Cobalt, 17 have been reported as catalyst for A 3 -coupling reaction under homogeneous or heterogeneous reaction conditions. One of the most important developments in the field of A 3 -coupling reaction occurred when this reaction was efficiently performed by a homogeneous gold catalyst.…”

A Novel Recyclable Ni/Cu/Fe Termetallic Nanocatalyst for the Synthesis of Propargylamines through the A3‐Coupling Reactions

“…Recently, some heterogeneous nanoparticles have been reported as the efficient catalytic systems for the A 3 ‐coupling reactions of aldehydes, amines, and terminal alkynes . Heterogeneous magnetic nanoparticles catalytic systems are more popular due to fast and cost‐effective separation of the catalyst from the reaction medium by applying an external magnetic field.…”

“…Recently, some heterogeneous nanoparticles have been reported as the efficient catalytic systems for the A 3 -coupling reactions of aldehydes, amines, and terminal alkynes. [21][22][23][24][25] Heterogeneous magnetic nanoparticles catalytic systems are more popular due to fast and cost-effective separation of the catalyst from the reaction medium by applying an external magnetic field. More recently, some methods have been successfully developed which use nickel and nickel oxide nanoparticles as the efficient catalysts for A 3 -coupling reactions.…”

Expeditious and highly efficient synthesis of propargylamines using a Pd‐Cu nanowires catalyst under solvent‐free conditions

“…[33][34][35][36] Bimetallic nanocatalysts in particular show significant advantages compared to monometal counterparts, such as enhanced catalytic activity, improved stability and selectivity derived from synergistic effects. [37,38] In recent years, a large amount of bimetallic Pd-M (M = Pt, Au, Ag, Ni, Co) catalysts were constructed and used to catalyze organic reactions. [39][40][41][42][43] Very recently, we successfully synthesized Pd-Cu nanowires (Pd-Cu NWs) by a facile and efficient one-pot wet-chemical method (see TEM images in the SI), which show high catalytic activity in the Suzuki cross coupling reaction under mild conditions.…”