20993-80-0Relevant academic research and scientific papers
Chemoselective hydrogenation of aromatic ketones with Pt-based heterogeneous catalysts. Substituent effects
Vetere, Virginia,Merlo, Andrea B.,Casella, Mnica L.
, p. 70 - 77 (2015/05/06)
Catalytic reduction of aromatic ketones is an interesting reaction that leads to the obtaining of alcohols. Some of these alcohols are employed as intermediaries to produce chemical fine compounds. The bimetallic catalysts are widely used in the chemoselective hydrogenation. The Surface Organometallic Chemistry on Metals (SOMC/M) is a methodology employed to obtain bimetallic systems. In the present work the hydrogenation of ketones derived from acetophenone has been studied. The aim was observe the effect on activity and selectivity to aromatic alcohols by the presence of substituents in the ring. The chemical characteristics of substituents groups could influence the way aromatic ketones are absorbed on the metallic surface. This fact can be explained by a combination of geometric and electronic effects.
Tuning the selectivity in the hydrogenation of aromatic ketones catalyzed by similar ruthenium and rhodium nanoparticles
Castelbou, Jessica Llop,Bres-Femenia, Emma,Blondeau, Pascal,Chaudret, Bruno,Castilln, Sergio,Claver, Carmen,Godard, Cyril
, p. 3160 - 3168 (2015/02/19)
Ru and Rh nanoparticles (NPs) RuI, RuII, RhI and RhII, stabilised by triphenylphosphine (PPh3) and diphenylphosphinobutane (dppb) were synthesised, characterised and applied as catalysts in the hydrogenation of several aromatic ketones. The effects of the nature of the metal and of the stabilising agent on the aryl versus ketone hydrogenation were studied. For RhNPs, the coordination of arene dominates the interaction of the substrate with the NP, whereas the coordination of the ketone group was not evidenced. For RuNPs, however, the results show that both arene and ketone coordinate to the NPs surface in a competitive manner. The properties of the stabilising ligands have a clear influence on the outcome of the reaction, and for the Rh-catalysed reactions, products of hydrogenolysis were only formed if PPh3 was used as the stabiliser. The structure of the substrate was also a key factor for the selectivity.
ALICYCLIC ESTER WITH MUSK FRAGRANCE
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Page/Page column 28, (2008/06/13)
A compound of formula (I) or (II) is disclosed, whereby, in formulas (I) and (II), R1 = an optionally-substituted (a) branched or unbranched C1 to C5 alkyl, or (b) branched or unbranched C2 to C5 alkylene, or (c) C3 to C5 cycloalkyl and in formula (II) the bond represented by a dotted line may be either a single- or a double-bond.
