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 PEG 200 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.
Phosphorylated PEG (PPEG) as a New Support for Generation of Nano-Pd(0): Application to the Heck-Mizoroki and Suzuki-Miyaura Coupling Reactions. -This describes new nano-Pd catalysts generated in situ from PdCl 2 and bis-diphenylphosphorylated PEGs. The catalysts are successfully applied in coupling reactions and can be easily recycled and reused at least four times without a significant loss in activity. -(IRANPOOR*, N.; FIROUZABADI, H.; RIAZI, A.; SHAKERPOOR, A.; Appl. Organomet. Chem. 27 (2013) 8, 451-458, http://dx.doi.org/10.1002/aoc.3002 ; Dep. Chem., Coll. Sci., Shiraz Univ., Shiraz 71454, Iran; Eng.) -Roessler 52-082
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.