Zwitterionic-surfactant-stabilized palladium nanoparticles as catalysts in the hydrogen transfer reductive amination of benzaldehydes
| Autor: | Faruk Nome, Emma E. Drinkel, Roberta R. Campedelli, Haidi D. Fiedler, Alex M. Manfredi |
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| Rok vydání: | 2014 |
| Předmět: |
inorganic chemicals
Hydrogen Surface Properties Inorganic chemistry chemistry.chemical_element Metal Nanoparticles Homogeneous catalysis Reductive amination Catalysis Metal chemistry.chemical_compound Formate Amination Aqueous solution Molecular Structure Chemistry Organic Chemistry technology industry and agriculture visual_art Reagent Benzaldehydes visual_art.visual_art_medium Oxidation-Reduction Palladium |
| Zdroj: | The Journal of organic chemistry. 79(6) |
| ISSN: | 1520-6904 |
| Popis: | Palladium nanoparticles (NPs) stabilized by a zwitterionic surfactant are revealed here to be good catalysts for the reductive amination of benzaldehydes using formate salts as hydrogen donors in aqueous isopropanol. In terms of environmental impact and economy, metallic NPs offer several advantages over homogeneous and traditional heterogeneous catalysts. NPs usually display greater activity due to the increased metal surface area and sometimes exhibit enhanced selectivity. Thus, it is possible to use very low loadings of expensive metal. The methodology eliminates the use of a hydrogen gas atmosphere or toxic or expensive reagents. A range of aromatic aldehydes were converted to benzylamines when reacted with primary and secondary amines in the presence of the Pd NPs, which also displayed good activity when supported on alumina. In every case, the Pd NPs could be easily recovered and reused up to three more times, and at the end of the process, the product was metal-free. |
| Databáze: | OpenAIRE |
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