A bimetallic PdCu–Fe₃O₄catalyst with an optimal d-band centre for selectiveN-methylation of aromatic amines with methanol

Abstract

Catalytic methylation utilising methanol as a sustainable C1 building block and hydrogen source continues to attract attention due to its atom-economical, cost-effective, and simple one-pot method. So far, research on...

Catalytic semi‐hydrogenation through hydrogen transfer from carbohydrates as a sustainable hydrogen source over bimetallic PdCuFe3O4 nanoparticles

“…Bimetallic PdCu NP catalysts have previously been applied as efficient catalysts in the semi‐hydrogenation of alkynes, 16 transfer hydrogenation, 17 and various organic reactions 18 based on the distinctive synergistic effect of the two metals. The use of PdCu alloy NPs is economical and advantageous because the composition includes low‐cost Cu that could enhance the catalytic activity 19 .…”

“…Bimetallic Pd x Cu y Fe 3 O 4 NP catalysts were prepared by a modified polyol method, as reported previously by our group 17 . Pd x Cu y alloy NPs of different compositions ( x : y = 1: 0.6, 1: 1, and 0.5: 1) were synthesized on the Fe 3 O 4 NP support (100 nm) by varying the amounts of the metal precursors.…”

“…Bimetallic Pd x Cu y Fe 3 O 4 NP catalysts were prepared by a modified polyol method, as reported previously by our group. 17 S1). The morphology of the Pd x Cu y Fe 3 O 4 NPs was studied using scanning electron microscopy (SEM) and field-emission transmission electron microscopy (FE-TEM) (Figures 1 and S1-S2).…”

Harnessing alcohols as sustainable reagents for late-stage functionalisation: synthesis of drugs and bio-inspired compounds

“…92 Recently, Kim and co-workers developed bimetallic heterogeneous catalysis for the N-methylation of amines and extended for the synthesis of imipramine 98i, which is widely used as an antidepressant drug (Scheme 46, method S). 93 In 2018, Naka and co-workers disclosed the photocatalytic Nalkylation of functionalised amines using a combination of the heterogeneous photocatalysts Cu/TiO 2 and Au/TiO 2 and 300 W Xe lamp with a UV-mirror in the wavelength range of 300-470 nm for the efficient conversion. The synthesis of (rac)rivastigmine 99a (chiral-(S) used to treat Alzheimer's and Perkinson's disease), alverine 98k (a drug for irritable bowel syndrome), and desloratadine 98l (used for allergies) was achieved in excellent yield (Scheme 46, method T).…”

Multi-Functionality of Methanol in Sustainable Catalysis: Beyond Methanol Economy

“…Kim and his research team presented a bimetallic Pd 1 Cu 0.6 -Fe 3 O 4 NPs catalyst for the selective N -methylation of amines (Scheme ). This transformation was carried out using methanol as the carbon source in the presence of K 2 CO 3 .…”