Exfoliation effect of PEG-type surfactant on Pd supported GO (SE-Pd(nanoparticle)/GO) in cascade synthesis of amides: A comparison with Pd(nanoparticle)/rGO

Abstract

In the presence investigation, a cascade method for the synthesis of primary amides is discussed by the catalysis of Pd supported onto graphene oxide (Pd/GO) nanosheets. Also, the effect of different polyethyleneglycol-type (PEG-type) polyethers including PEG-300, P123 and F127 on the catalytic activity of Pd/rGO is studied in the the reaction of aldehyde and hydroxylamine hydrochloride to give benzamide. Addition of PEG-type polyethers played an important role in raising the catalytic power of Pd(nanoparticle)/GO by exfoliation of GO sheets. The present paper introduces Pd(nanoparticle)/GO as first Pd supported GO for the synthesis of primary amides through this method. This catalyst was highly active, efficient, tolerant, and environmentally benign in one-pot conditions with recyclability at least for 8 runs. Also, this study suggests the prevailing catalytic activity of Pd(nanoparticle)/GO rather to Pd(nanoparticle)/rGO in a comparitive experiment.

Mizoroki–Heck and Suzuki–Miyaura reactions mediated by poly(2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid)‐stabilized magnetically separable palladium catalyst

“…The immobilization of palladium on various solid supports has led to the development of several types of heterogeneous palladium catalysts . The support is one of the most important and key factors in heterogeneous catalyst systems, because it plays a crucial role in longevity, conversion yield and thermal and mechanical stability of the catalyst . These parameters principally determine whether a catalyst is practicable for industrial processes.…”

Single-pot tandem oxidative/C–H modification amidation process using ultrasmall PdNP-encapsulated porous organosilica nanotubes

“…In line with the development of sustainable protocols and inspired by our previous work on the catalytic application of solid-based catalysts and porous materials (PMO, SBA-15, and MOF) in organic reaction transformations, 31,34,52,53,55–65 especially the synthesis of amides, 66–70 herein, we describe a one-pot tandem oxidative amidation reaction using Pd NPs @B-SNTs as an active catalyst and H 2 O 2 as a green oxidant for the synthesis of primary, secondary, and tertiary amides. The catalytic activity domain of Pd NPs @B-SNTs for the synthesis of amides using various structural compounds (primary aromatic and aliphatic alcohols, amine salts, and NH 2 OH·HCl) through oxidative amidation was evaluated.…”

Phase Transfer Ceria-Supported Nanocatalyst for Nitrile Hydration Reaction

“…This demonstrates the solid solution nature of the reported catalysts in this communication. The marginal shift in d -spacing values (shown in HR-TEM images) is attributed to the stress of accommodating La/Sa and Ru oxides in the ceria crystallites. ,, In Figure e, La 2 O 3 and CeO 2 exhibited the overlapped lattice fringes for CLR oxides ( d 0.34 nm), and Figure c,d also shows the overlapped lattice fringes for CSR oxides ( d 0.34 nm) and individually for Sm 2 O 3 ( d 0.228 nm) . The bulk portion was taken for elemental mapping for CSR and CLR catalysts, respectively.…”

“…The hydration of nitriles to generate the corresponding amides is an important transformation from both academic and industrial points of view. Amides not only constitute versatile building blocks in synthetic organic chemistry but also have a wide range of industrial applications and biologically active and pharmacological interests. − …”