Journal
NEW JOURNAL OF CHEMISTRY
Volume 32, Issue 7, Pages 1124-1130Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b717995b
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Cyclohexyldiamine-modified glycidyl methacrylate polymer (GMA-CHDA) in the form of gel-type beads was used to encapsulate Pd(0) nanoparticles 4-15 nm in diameter and applied as a new, reusable catalyst for the Suzuki-Miyaura cross-coupling reaction of 2- and 4-bromotoluene with phenylboronic acid. It was found that the precatalyst preparation methodology strongly influenced its catalytic activity. The best results (100% yield of the product) were obtained when GMA-CHDA was first treated with hydrazine (reducing agent for Pd(II)) and next with PdCl(2) solution. The new catalyst acts heterogeneously, and the post-reaction solution after catalyst separation is not catalytically active, suggesting that there is no leaching.
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