Supported gold nanoparticles as efficient and reusable heterogeneous catalyst for cycloisomerization reactions
We report the utilization of a novel catalyst for cycloisomerizations. The novel catalyst system contains gold nanoparticles supported on Al-SBA15, which was prepared by the ball-milling process. We developed a greener methodology for synthesizing spiroindolines under heterogeneous conditions, using...
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| Veröffentlicht in: | Green chemistry : an international journal and green chemistry resource : GC 2015-06, Vol.17 (6), p.3314-3318 |
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| container_issue | 6 |
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| container_title | Green chemistry : an international journal and green chemistry resource : GC |
| container_volume | 17 |
| creator | Schroder, Felix Ojeda, Manuel Erdmann, Nico Jacobs, Jeroen Luque, Rafael Noeel, Timothy Van Meervelt, Luc Van der Eycken, Johan Van der Eycken, Erik V |
| description | We report the utilization of a novel catalyst for cycloisomerizations. The novel catalyst system contains gold nanoparticles supported on Al-SBA15, which was prepared by the ball-milling process. We developed a greener methodology for synthesizing spiroindolines under heterogeneous conditions, using this novel class of supported gold nanoparticles in combination with microwave irradiation. The catalyst is highly reusable and selective. Cycloisomerization reaction yields ranged from good to excellent leading to the formation of two novel classes of six- and seven-membered heterocycles, which have been unprecedented so far. The selectivity of the catalyst towards the desired products is high and the reaction can be performed in ethanol as the solvent. A one-pot cascade reaction could be established commencing with the Ugi-reaction to ensure diversity. |
| doi_str_mv | 10.1039/c5gc00430f |
| format | Article |
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The novel catalyst system contains gold nanoparticles supported on Al-SBA15, which was prepared by the ball-milling process. We developed a greener methodology for synthesizing spiroindolines under heterogeneous conditions, using this novel class of supported gold nanoparticles in combination with microwave irradiation. The catalyst is highly reusable and selective. Cycloisomerization reaction yields ranged from good to excellent leading to the formation of two novel classes of six- and seven-membered heterocycles, which have been unprecedented so far. The selectivity of the catalyst towards the desired products is high and the reaction can be performed in ethanol as the solvent. 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| fulltext | fulltext |
| identifier | ISSN: 1463-9262 |
| ispartof | Green chemistry : an international journal and green chemistry resource : GC, 2015-06, Vol.17 (6), p.3314-3318 |
| issn | 1463-9262 1463-9270 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1730077771 |
| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Aluminum Catalysts Ethyl alcohol Gold Isomerization Microwaves Nanoparticles Reusable |
| title | Supported gold nanoparticles as efficient and reusable heterogeneous catalyst for cycloisomerization reactions |
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