CO and H2 gas-free efficient reductive carbonylation of aryl iodides. Use of smart recyclable metal-based catalysts

Bosello, Nicolò; Michele, Alessandro Di; Piccolo, Oreste; Paganelli, Stefano

doi:10.1016/j.apcata.2023.119145

Cited by 1 publication

(1 citation statement)

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“…All the catalysts were previously studied by SEM and TEM electron microscopy, showing the lamellar structure of Al 2 O 3 and highlighting the presence of metal nanoparticles on the support surface with dimensions less than 10 nm. Moreover, SEM and TEM images demonstrated that the metal nanoparticles remain well dispersed on the support surface and do not aggregate after the reaction [4,13].…”

Section: Discussionmentioning

confidence: 97%

Synthesis of Helional by Hydrodechlorination Reaction in the Presence of Mono- and Bimetallic Catalysts Supported on Alumina

Piccolo,

Arčon,

Das

et al. 2024

Catalysts

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Hydrodechlorination reaction of 3-(benzo-1,3-dioxol-5-yl)-3-chloro-2-methylacrylaldehyde in the presence of different low metal content heterogeneous mono- or bimetallic catalysts was tested for the synthesis of the fragrance Helional® (3-[3,4-methylendioxyphenyl]-2-methyl-propionaldehyde). In particular, mono Pd/Al2O3, Rh/Al2O3 or bimetallic Pd-Cu/Al2O3, Rh-Cu/Al2O3 catalysts were tested in different reaction conditions from which it emerged that mono-Rh/Al2O3 was the best performing catalyst, allowing achievement of 100% substrate conversion and 99% selectivity towards Helional® in 24 h at 80 °C, p(H2) 1.0 MPa in the presence of a base. To establish correlations between atomic structure and catalytic activity, catalysts were characterized by Cu, Rh and Pd K-edge XANES, EXAFS analysis. These characterizations allowed verification that the formation of Pd-Cu alloys and the presence of Cu oxide/hydroxide species on the surface of the Al2O3 support are responsible for the very low catalytic efficiency of bimetallic species tested.

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Section: Discussionmentioning

confidence: 97%