1D Fe_3O_4@CuSiO_3 composites catalyzed decarboxylative A~3-coupling for propargylamine synthesis |
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Affiliation: | 1. Laboratorio de Físico-Química Orgánica, IVIC, Caracas 1020-A, Venezuela;2. Laboratorio de Síntesis y Caracterización de Nuevos Materiales, IVIC, Caracas 1020-A, Venezuela;3. Laboratorio de Físico-Química Teórica de Materiales, IVIC, Caracas 1020-A, Venezuela;1. Department of Chemistry, Tarbiat Modares University, P.O. Box 14155-175, Tehran, Iran;2. Department of Food Nanotechnology, Research Institute of Food Science and Technology (RIFST), Mashhad 91735-147, Iran |
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Abstract: | Highly active and stable magnetic copper catalysts were successfully achieved by magnetic induced Stober method and subsequent hydrothermal reaction with copper ions in alkaline condition.The high content of Cu~(2+) as well as the unique structures of hierarchical copper silicate in the as-prepared catalysts endowed their outstanding catalytic performance.Efficient decarboxylative A~3-coupling of a-keto acid,amine and alkyne was realized with the low Fe_3 O_4@CuSiO_3 loading.A range of propargylamines were produced in good to excellent yields under solvent-free condition.Moreover,the catalyst can be easily separated from the final organic product with an external magnet.Also,this kind of catalyst could be recycled up to six times while maintaining its activity. |
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Keywords: | Magnetic copper catalyst Heterogeneous catalysis One-dimensional Decarboxylative coupling Propargylamines |
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