Use of a specific functionalised organosilicon compound as a coupling agent in an isoprene elastomer composition including a reinforcing inorganic filler
available MgO and anion exchange resins. This catalyst also acts as a heterogeneous catalyst for the epoxidation of electron-deficient olefins with hydrogen peroxide. Further, the catalyst/product(s) separation can be easily carried out by the simple filtration (or centrifugation) and the reaction is immediately stopped by the removal of the solid catalyst, suggesting that the nature of the observed
Better together: A novel hybrid N‐heterocycliccarbene (NHC) palladium complex, integrating a totally inorganic and polyanionic decatungstate unit, has been synthesized following a convergent strategy. The interplay of the Pd binding domains with the inorganic scaffold is instrumental in accessing multi‐turnover catalysis in CC cross‐coupling and aromatic dehalogenation reactions under MW‐assisted
group of the linked ionic liquids. The supporting of platinumnanoparticles on the modified magneticnanoparticles was achieved by adsorbing platinum salts (K2PtCl4) on the surface of the magnetite nanoparticles via ion exchange with the linked ionic liquid groups and then reducing them by hydrazine. The supportedplatinumnanoparticles were applied in the catalytic hydrogenation of alkynes in which
Homogeneous and Semi-Heterogeneous Magnetically Retrievable Bis-N-Heterocyclic Carbene Rhodium(I) Based Catalysts for Selective Hydroaminomethylation Reactions
reactivity and selectivity compared to catalysts containing bidentate phosphine or monodentate NHC ligands. A triethoxysilyl-functionalized bis-NHC ligand was immobilized on magnetic nanoparticles and then utilized to bind a rhodiumcatalyst. The resulting catalytic system was successfully employed in hydroaminomethylation reactions. The catalyst exhibited excellent reactivity, high selectivity, and was
SBA‐15/POSS‐Imidazolium Hybrid as Catalytic Nanoreactor: the role of the Support in the Stabilization of Palladium Species for C−C Cross Coupling Reactions.
作者:Carla Calabrese、Vincenzo Campisciano、Fabiana Siragusa、Leonarda F. Liotta、Carmela Aprile、Michelangelo Gruttadauria、Francesco Giacalone
DOI:10.1002/adsc.201900350
日期:2019.8.21
recoverable from the reaction mixture. The recyclability was verified for up to seven cycles without showing any activity decrease. Interestingly, only Pd(II) was detected in the reused catalyst in the Heckreaction. Therefore, the versatility of the material was investigated by using various aryl halides. Our palladium nanocomposite was able to promote both Suzuki and Heckreactions down to 0.0007 mol%