Highly selective transfer hydrogenation of α,β-unsaturated carbonyl compounds using Cu-based nanocatalysts

Abstract

Simultaneous dehydrogenation of cyclohexanol to cyclohexanone and hydrogenation of α,β-unsaturated carbonyl compounds to corresponding α,β-unsaturated alcohols was carried out in a single pot reaction without addition of any external hydrogen donor.

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 Water/Toluene Biphasic Medium Improves Yields and Deuterium Incorporation into Alcohols in the Transfer Hydrogenation of Aldehydes

“…Unsaturated alcohols are regarded as more valuable due to their role in synthesis, especially in the fragrance industry. In order to obtain cinnamyl alcohol, in most cases a heterogeneous catalyst is used [68,69] although nanocatalysts, [70] plasmonic nanoparticles [71] or homogeneous catalysts [72] have also been reported.…”

Boosting the Performance of Nano-Ni Catalysts by Palladium Doping in Flow Hydrogenation of Sulcatone

“…To prepare palladium nano-catalyst we adopted a similar procedure as for NiTSNH 2 synthesis, which was described in detailed elsewhere [10]. Briefly, the palladium precursor (Pd(acac) 2 ) was dissolved in ethanol and mixed with 1 g of TOPO (capping agent).…”

“…An attractive group of reactants is represented by unsaturated carbonyls, which are used extensively by the food, flavor, drugs, and other fine chemicals and pharmaceutical industries [6][7][8][9][10][11][12]. They are usually produced from unsaturated aldehydes or ketones via the hydrogenation process, thus taking control of the process chemoselectivity of vital importance [13,14].…”