Author, as appears in the article.: Blondeau, P.; Martinez-Espinar, F. ; Nolis, P. ; Chaudret, B. ; Claver, C. ; Castillón, S. ; Godard, C.

Department: Química Física i Inorgànica Química Analítica i Química Orgànica

URV's Author/s: BLONDEAU , PASCAL JEAN CLAUDE LEON; Martinez-Espinar, F. ; Nolis, P. ; Chaudret, B. ; CLAVER CABRERO, MARIA DEL CARMEN OROSIA; CASTILLÓN MIRANDA, SERGIO; GODARD , CYRIL

Keywords: hydrogenation NHCs rhodium nanoparticles

Abstract: New Rh-NPs stabilised by N-Heterocyclic Carbenes (NHC) were synthesized by decomposition of [Rh(g3-C3H5)3] under H2 atmosphere and fully characterized. Surface studies by FT-IR and NMR spectroscopy employing isotopically labelled ligands were also performed. The Rh0.2 NPs are active catalysts in the reduction of various aromatic substrates. In the reduction of phenol, high selectivities to cyclohexanone or cyclohexanol were obtained depending on the reaction conditions. However, this catalytic system exhibited much lower activity in the hydrogenation of substituted phenols. Pyridine was easily hydrogenated under mild conditions and interestingly, the hydrogenation of 4-methyl and 4- trifluoromethylpyridine resulted slower than that of 2-methylpyridine. The hydrogenation of 1- (pyridin-2-yl)propan-2-one provided the b-enaminone 13a in high yield as a consequence of the partial reduction of the pyridine ring followed by isomerization. Quinoline could be either partially hydrogenated to 1,2,3,4-tetrahydroquinoline or fully reduced to decahydroquinoline by adjusting the reaction conditions.

Research group: Síntesis Orgànica Estereoselectiva Organometàl.lics i Catàlisi Homogènia Grup de Quimiometria, Qualimetria i Nanosensors

Thematic Areas: Chemistry Química Química

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 0021-9517

Author identifier: 0000-0003-1331-5055; ; ; ; 0000-0002-2518-7401; 0000-0002-0690-7549; 0000-0001-5762-4904

Record's date: 2018-02-21

Last page: 127

Journal volume: 354

Papper version: info:eu-repo/semantics/acceptedVersion

Link to the original source: https://www.sciencedirect.com/science/article/pii/S0021951717302956

Funding program: altres; Grupos consolidados; 2014SGR670 plan; Retos; CTQ2016-75016-R, AEI/FEDER, UE altres; Grant Marti Franquès- URV ; 2013PMF-PIPF-90

Article's DOI: 10.1016/j.jcat.2017.08.010

Entity: Universitat Rovira i Virgili

Journal publication year: 2017

First page: 113

Publication Type: Article Artículo Article