Palladium Nanoparticles Supported on Poly(N-vinylpyrrolidone)-Grafted Silica as an Efficient Catalyst for Copper-Free Sonogashira and Suzuki Cross-Coupling Reactions

Journal of the Brazilian Chemical Society

Bahman Tamami¹  Fatemeh Farjadian¹  Soheila Ghasemi¹  Hamed Allahyari¹  Motahareh Mirzadeh¹ 

关键词: organic-inorganic hybrid support;    polyvinylpyrrolidone-grafted silica;    palladium nanoparticles;    Sonogashira reaction;    Suzuki reaction;   

DOI  :  10.5935/0103-5053.20150129

来源: SciELO

【 摘 要 】

Palladium catalyst based on polyvinylpyrrolidone-silica hybrid support was prepared and exhibited excellent activity and stability in copper, amine and phosphine-free Sonogashira-Hagihara and Suzuki-Miyaura cross-coupling reactions. The polymeric catalyst was applied efficiently in the coupling reactions of chloro (as well as iodo) and bromoarenes. Elemental analysis of Pd by inductively coupled plasma (ICP) and hot filtration test revealed low leaching of the metal into solution from the supported system. The catalyst could be reused many times in repeated cycles without significant decline in its activity.

【 授权许可】

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