Catalysts Covalently Bound to the Amphiphilic Block Copolymer

Catalysts Covalently Bound to the Amphiphilic Block Copolymer 

A second approach that should allow for catalyst recycling is based on amphiphilic block copolymers, where the catalyst is covalently bound to the hydrophobic block. The groups of G. Oehme in Rostock and O. Nuyken in Munich are working on such systems that are sometimes described as metallosurfactants. The appending polymers without the catalyst are called macroligands or amphiphihzed ligands [4, 50]. 

1 Phosphine-Functionalized Amphiphlles for Rhodium-Catalyzed Hydrogenation 

In methanol as solvent, the results are comparable with respect to activity and enantioselectivity (Tab. 6.2, entry (1)) whereas in water the complex of the amphiphilic ligand shows a significant increase in activity and enantioselectivity compared with the BPPM complex (entry (2)). The values obtained for mixed micelles 

2 Triphenylphosphine-Functionalized Amphiphiles for Rhodium-Catalyzed Hydroformylation and Palladium-Catalyzed Heck Coupling Reaction 

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