Phosphorylated PEG (PPEG) as a new support for generation of nano-Pd(0): Application to the Heck-Mizoroki and Suzuki-Miyaura coupling reactions

Article abstract of DOI:10.1002/aoc.3002

Polyethylene glycols (PEGs) with different molecular weights (M_w = 200, 400, 1000) were phosphorylated to their bis-diphenyl phosphinite derivatives as stable solids which are melted in the range 140-160°C. These phosphorylated PEGs were used as ligands and reducing agents to generate nano-Pd(0) catalysts in 2.5-8.3 nm. The nano-Pd(0) particles supported on phosphorylated PEG₂₀₀ were applied for the efficient Heck-Mizoroki carbon-carbon coupling reactions of ArX (X = Cl, Br, I) at 80-100°C under solvent-free conditions and for the Suzuki-Miyaura coupling reaction in ethanol at 70°C. The catalyst was recycled easily and reused for several runs. Copyright