عنوان
Palladium nanoparticles supported on natural polymer (silk fibroin): the efficient and recyclable catalyst for Heck reaction
نویسنده (گان)
Mirzaei,Hakimeh ;Eshghi,Hossein;Seyedi,Seyed mohammad
چکیده مقاله
The Heck reaction, one of the most utilized cross-coupling reactions, is the palladium-catalyzed arylation of an olefin with an aryl halide under basic conditions. It has drawn much attention due to high efficiency and simplicity. Heck methodology is attractive from a synthetic point of view because of its high chemoselectivity and mild reaction conditions along with low toxicity and cost of the reagent if, specifically, the catalyst is recycled. Fig (1): Heck reaction of an olefin with an aryl halide under basic conditions The Heck reaction is described as a vinylation or arylation of olefins where a large variety of olefins can be used, like derivatives of acrylates, styrenes or intramolecular double bonds [2]. The aryl halide variants developed in addition to typical aryl bromides and iodides are aromatic triflates, aroyl chlorides, aryl sulfonyl chlorides, aromatic diazonium salts, aroyl anhydrides, aryl chlorides and arylsilanols [3]. The Fibroin/ Pd nanoparticles showed high catalytic activity in the heck coupling reaction. Attractive features of this protocol are high yields, simple procedure with an easy work-up, and recyclability and reusability of the catalyst.

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