One‐pot oxidant‐free dehydrogenation‐Knoevenagel tandem reaction catalyzed by a recyclable magnetic base‐metal bifunctional catalyst

Abstract

A new base-metal bifunctional catalyst NH-Pd(0)@MNP was prepared via a facile procedure and fully characterized. The as-prepared catalyst was used as an efficient relay catalyst for the one-pot oxidant-free dehydrogenation-Knoevenagel condensation tandem reaction from benzyl alcohol in H 2 O under mild conditions and generated benzalmalononitriles with yield up to 96%. Meanwhile, the catalyst could be easily recovered from the reaction system by an external magnetic field, and is reusable with little loss of activity up to 6 runs (<5%).

A new 2D coordination polymer as bifunctional heterogeneous catalyst for tandem deacetalization‐Knoevenagel reaction

“…α,β-unsaturated compounds can be prepared through Knoevenagel condensation reaction catalyzed by various materials such as metal-organic frameworks (MOFs), porous organic polymers, functionalized silica-based compounds, and magnetic nanoparticle-supported catalysts. [4][5][6][7] α,β-unsaturated nitriles are important chemicals for the preparation of pharmaceuticals and functional compounds, which can be synthesized via one-pot reactions. [8][9][10][11] Onepot tandem deacetalization-Knoevenagel reaction has been explored for the straightforward preparation of α,β-unsaturated nitriles.…”

One‐pot Suzuki Coupling‐Knoevenagel Condensation Tandem Reaction Catalyzed by a Recyclable Magnetic Bifunctional Catalyst

“…Recently, we designed and synthesized a magnetic nanoparticles supported amine‐palladium bifunctionalized catalyst NH−Pd(0)@MNP (Figure 1. ), and used it in one‐pot oxidant‐free dehydrogenation‐Knoevenagel condensation tandem reaction [59] . In order to explore the wider application of this new bifunctional catalyst, herein we wish to report its new application as an efficient and recyclable bifunctional catalyst in one‐pot Suzuki coupling‐Knoevenagel condensation tandem reaction.…”

Photocatalytic one‐pot multidirectional N‐alkylation over Pt/D‐TiO2/Ti3C2: Ti3C2‐based short‐range directional charge transmission

“…[1][2][3][4][5] One-pot tandem/cascade reactions typically require multifunctional catalysts with different catalytically active sites in a site-isolated way to keep their independent function, provide great advantage, and spur extensive research interest by simplifying the multistep reaction catalysis process into a single synthesis operation without having to isolate the intermediate. [6][7][8][9][10] Two-dimensional materials have been widely investigated in different applications due to their unusual electronic, mechanical, and optical properties. [11][12][13] The emerging 2D transition metal carbide/carbonitride family (MXenes), with general formula M n + 1 X n T x (n = 1, 2, 3; T x = OH, O, F group), has been extensively studied during the past few years due to its excellent structure and chemical properties.…”