Highly selective copper nanoparticles for the hydrogenation of α,β-unsaturated aldehydes in liquid phase

Porous, Naturally Derived Hafnium Phytate for the Highly Chemoselective Transfer Hydrogenation of Aldehydes with Other Reducible Moieties

“…To date, direct hydrogenation with the use of H 2 as the reductant and catalytic transfer hydrogenation (CTH) with secondary alcohols are two routes that are commonly used for the reduction of aldehydes with ORMs, and great efforts have been devoted to exploring efficient and selective catalytic systems. In general, supported transition metals (e.g., Ru, Pd, Au, Pt, Cu, Co, Ir, and Ni) and metal complexes have been the most studied catalysts for this important transformation, but the selectivities for alcohols with unreduced ORMs are often poor or difficult to control owing to competitive adsorption and reduction between the aldehyde group and the ORMs on the catalytic active centers. Although the selectivity towards alcohols with unreduced ORMs can be enhanced by designing novel ligands for metal complexes; by introducing additives, other metal components, and functional supports; and by designing special structures for supported catalysts, the complex preparation routes, the high cost, and the stability and recyclability of these catalytic systems still limit their large‐scale application.…”

A new and efficient methodology for olefin epoxidation catalyzed by supported cobalt nanoparticles

“…Therefore, there remains a need to develop and improve catalytic systems for alkene epoxidation by using low cost and easy to prepare supported cobalt nanoparticles as reusable heterogeneous catalysts [27] that are wide in substrate scope, active enough and highly selective. As part of our continuing interest in the development of new synthetic methodologies based on the use of catalysis by non-noble transition metal nanoparticles (MNPs) for their application in a wide range of relevant organic transformations [45][46][47][48][49][50][51][52], we report herein our study on the performance of CoNPs/MgO nanocatalyst for olefin epoxidation reactions. Compared to previous reports in the same field, it should be highlighted that our CoNPs/MgO catalyst is readily prepared from low-cost commercially available starting materials, works in acetonitrile as the solvent (thus avoiding the use of toxic DMF), and can be recovered and reused maintaining its high activity.…”

Multiple Cores‐Shell Structured Cu@SiO2 Ultrathin Leaf‐Shaped Nanocomposite: Facile Fabrication and Excellent Selective Catalytic Hydrogenation Performance

“…To improve copper distribution in Cu/SiO 2 catalysts, meticulous and complicated assembly procedures are required. So far, ultrafine Cu/SiO 2 catalysts have been fabricated through embedding copper nanoparticles in the channels of SBA‐15, MCM‐41, MCM‐48 and KIT‐6 . Another approach involved prefabricating thermally stable copper silicate as precursor, in which cupric ions were homogeneously dispersed.…”