Palladium oxide nanoparticles supported on graphene oxide: A convenient heterogeneous catalyst for reduction of various carbonyl compounds using triethylsilane

Abstract

Palladium oxide nanoparticles supported on graphene oxide ‐ triethylsilane was found to be an effective reductive system for a broad range of reduction processes, including the reduction of various carbonyl compounds such as aromatic aldehydes to their corresponding alcohols or methyl arene compounds, aromatic ketones to their respective alcohols or saturated compounds, aromatic acyl chlorides to their reduced compounds. The desired products were obtained in good to excellent yields under mild conditions. The heterogeneous environmentally friendly catalyst can be easily separated from the reaction mixture through a simple filtration, facilitating purification of the prepared compounds.

Pd nanoparticles supported on reduced graphene oxide as an effective and reusable heterogeneous catalyst for the Mizoroki–Heck coupling reaction

“…The UV–Vis spectrum of rGO‐NH 2 dispersion (Figure b) depicts a peak at ~260 nm, which confirms the chemical change in this material with respect to GO . The UV–Vis spectrum of PdCl 2 displays peaks at ~210, 240, 300, and 425 nm (Figure c) . The UV–Vis spectrum of PdNPs/rGO‐NH 2 nanocomposite comprises peaks at ~210 and 240 nm (Figure d).…”

“…In continuation of our investigation in catalysis, we assessed the efficacy of PdNPs/rGO‐NH 2 nanocomposite as a heterogeneous catalyst for C–C bond formation via the Mizoroki–Heck cross‐coupling reaction of aromatic halides with alkenes. The synthesis of methyl cinnamate from the reaction of iodobenzene (0.5 mmol) with methyl acrylate (1 mmol) in the presence of PdNPs/rGO‐NH 2 nanocomposite (4 mg) was selected to optimize the coupling reaction.…”

“…[29,30] The UV-Vis spectrum of PdCl 2 displays peaks at~210, 240, 300, and 425 nm (Figure 8c). [41] The UV-Vis spectrum of PdNPs/rGO-NH 2 nanocomposite comprises peaks at~210 and 240 nm (Figure 8d). The disappearance of the peak at 425 nm as a result of the interaction of the surface of the substrate with the metal confirms the complexation of palladium by the substrate.…”

Ketone Hydrogenation by Using ZnO−Cu(OH)Cl/MCM‐41 with a Splash of Water: An Environmentally Benign Approach

“…Out of various metal nanoparticle supports reported like MnO 2, alumina, graphene oxide and cerium oxide, silica MCM‐41 as support pertaining its high surface area (∼1000 m 2 /g)ek; and pore diameter . Being a porous material, it is capable of providing more active sites to the reactant and permitting both internal and external catalysis .…”

Recent advancements in organic synthesis catalyzed by graphene oxide metal composites as heterogeneous nanocatalysts

“…Mirza‐Aghayan et al [ 129 ] reported reduction of carbonyl compounds to corresponding methylene derivatives in the presence of Et 3 SiH using PdONPs/GO (3.6 g) as a catalyst and ethanol as a solvent system at room temperature in 10–90 min (Scheme 15). An efficient, inexpensive, and eco‐benign nature, high reusability, and recyclability are the advantages of the catalyst.…”