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- W2142383075 startingPage "79" @default.
- W2142383075 abstract "Abstract In this paper we describe the facile and straightforward covalent functionalization of commercially available dendritic poly(propylenimine) and hyper‐branched poly(ethylenimine) with P‐containing functional groups. The P‐functionalized macromolecules have been applied as multivalent ligands in the Pd‐catalyzed allylic substitution reactions (batch and continuous process) using either morpholine or thiophenol as nucleophile. Palladium complexes of all described molecules are active in allylic substitution reactions. The PEI functionalized polymers appear more sensitive to small changes in the P/Pd ratio than the PPI analogues, but form catalysts that are more active. When used in a continuous flow process the macromolecules are completely retained by the nanofiltration membrane, while the catalytic activity decreases with time because of palladium depletion. This is more severe for the allylic thiolation, probably because of the stronger affinity of sulfur for palladium, facilitating palladium leaching." @default.
- W2142383075 created "2016-06-24" @default.
- W2142383075 creator A5013850715 @default.
- W2142383075 creator A5070975248 @default.
- W2142383075 creator A5084527048 @default.
- W2142383075 date "2009-05-01" @default.
- W2142383075 modified "2023-10-17" @default.
- W2142383075 title "Phosphorus Functionalized Dendrimers and Hyperbranched Polymers: Is There a Need for Perfect Dendrimers in Catalysis?" @default.
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