Selective hydrodeoxygenation of hydroxyacetophenones to ethyl-substituted phenol derivatives using a FeRu@SILP catalyst

Abstract

A Fe25Ru75@SILP catalyst opens a versatile route to produce value-added substituted ethylphenols from the selective hydrodeoxygenation of readily available hydroxyacetophenones.

Molecular Control of the Catalytic Properties of Rhodium Nanoparticles in Supported Ionic Liquid Phase (SILP) Systems

“…Immobilization of ILs onto porous solids can be accomplished through either physi- or chemisorption, whereby the covalent grafting on silica support has emerged as a very versatile methodology. , After incorporation onto solid materials the IL-type modifiers can no longer be considered a true “liquid phase”; nevertheless, these materials are commonly referred to as supported ionic liquid phases (SILPs). SILPs have been shown to be productive supports for metal NPs (NP@SILP) as they combine the properties of NP@IL catalysts with those of classical supported catalysts including (1) enhanced catalyst stability due to combination of the electrosteric protection of the IL-like layer with the stabilization from the support material and (2) direct implementation into continuous flow processes. , NPs@SILP catalysts have been used very successfully in a variety of transformations including C–C coupling, hydrogenation, hydrogenolysis, and hydrodeoxygenation under batch and continuous flow conditions. − While the influence of the molecular structure of the ILs on the morphology and catalytic properties of metal nanoparticles has been widely studied for the bulk liquid phase, − the impact of grafting the IL-type structure covalently on a porous solid is not clear. Understanding how the structure of the IL-like surface functionalities affects the NP synthesis in correlation to the catalytic properties of NP@SILP materials is, however, a prerequisite for the systematic design of these promising catalytic systems. , …”

“… 30 , 31 NPs@SILP catalysts have been used very successfully in a variety of transformations including C–C coupling, hydrogenation, hydrogenolysis, and hydrodeoxygenation under batch and continuous flow conditions. 29 − 41 While the influence of the molecular structure of the ILs on the morphology and catalytic properties of metal nanoparticles has been widely studied for the bulk liquid phase, 5 − 26 the impact of grafting the IL-type structure covalently on a porous solid is not clear. Understanding how the structure of the IL-like surface functionalities affects the NP synthesis in correlation to the catalytic properties of NP@SILP materials is, however, a prerequisite for the systematic design of these promising catalytic systems.…”

Hydrogen-Bonding-Mediated Selective Hydrogenation of Aromatic Ketones over Pd/C in Ionic Liquids at Room Temperature

“…The reduction of aromatic ketones with hydrosilanes or hydrogen or alcohols has been widely investigated, which can produce various chemicals, including aromatic and saturated alcohols/alkanes depending on the catalysts and reaction conditions (Scheme ). − To date, concerted efforts have been attempted by combining transition metals involving Rh, Ru, Pd, and Co with strong Brønsted/Lewis acids, and much progress has been achieved. For example, using polymethylhydrosiloxane as the reductant Pd/C can catalyze the reduction of aromatic ketones to alkanes in phenyl chloride (PhCl) at room temperature (Scheme a) .…”

Selectivity control in hydrogenation through adaptive catalysis using ruthenium nanoparticles on a CO2-responsive support

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ith the transition from fossil resources to a chemical value chain based on renewable energy and carbon resources, the development of new catalytic technologies to cope with the diversity and variation of feedstock quality is of crucial importance [1][2][3][4][5][6][7][8] . Extensive efforts are currently dedicated to the development of multifunctional catalytic systems able to achieve selective hydrogenation reactions of biomass-derived substrates and intermediates [9][10][11][12][13][14][15][16][17][18][19][20][21] . Although many of these catalysts present outstanding properties regarding their dedicated tasks, their performance is typically optimized for static operation under precisely defined parameters.

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