Abstract
Pd/DNA catalysts were prepared in a mixed H2O/EtOH solvent using palladium precursors, Pd(OAc)2 and PdCl2, in different dosages and salmon fish sperm DNA. As prepared, the Pd/DNA contained Pd(II) and Pd(0) nanoparticles of various sizes and morphologies, depending on the preparation method. Pd/DNA efficiently catalyzed the Suzuki–Miyaura cross-coupling of various aryl bromides with phenylboronic acids. The catalyst was recovered by simple phase separation and then reused in seven consecutive cycles with a high activity.
Highlights
Many aryl compounds, such as acids, amides, ketones, or biaryls are products of palladium-catalyzed coupling reactions which offer efficient and simple procedures for their production [1,2,3,4,5,6,7]
Carbon, magnetic materials, silica, hydroxyapatite, zeolites, nanoparticles, metal organic frameworks (MOFs), organic polymer, clay minerals and bio-supports have been used for this purpose [11]
Until now only one article has been published on testing DNA supported palladium nanoparticles (Pd NPs) in Suzuki–Miyaura reaction
Summary
Many aryl compounds, such as acids, amides, ketones, or biaryls are products of palladium-catalyzed coupling reactions which offer efficient and simple procedures for their production [1,2,3,4,5,6,7]. One of the most effective routes to biaryls is the Suzuki–Miyaura cross-coupling of arylboronic acids and aryl halides [8,9]. The importance of palladium based heterogeneous catalytic systems is growing because of their easy separation from the reaction mixture and their recycling potential. Among heterogeneous catalytic systems palladium nanoparticles (Pd NPs) have a special place. Until now only one article has been published on testing DNA supported Pd NPs in Suzuki–Miyaura reaction. Our studies aimed at the synthesis of DNA-supported Pd NPs using different precursors and reaction conditions. We expected to receive active and recyclable catalysts for the Suzuki–Miyaura coupling and to find correlation between the catalyst structure and its activity
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