Journal
SYNLETT
Volume 25, Issue 15, Pages 2161-2165Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0034-1378533
Keywords
supported catalysis; dendrimers; carbene complexes; palladium; cross-coupling; green chemistry
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [EXC 314]
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Highly active glycerol-dendron-supported N-heterocyclic carbene-palladium catalysts with catalytic sites at the core position were obtained with an efficient modular synthesis. A symmetrical ligand structure was designed to build a larger micro-environment by increasing the number of dendron generations. The catalytic activity was tested in Suzuki-Miyaura cross-coupling reactions. Deprotection of the dendritic supported catalysts allowed the catalytic reaction to take place in neat water, which is highly desirable for a more sustainable processing. A positive dendritic effect was observed for coupling of activated and nonactivated bromoaryls.
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