ORGN 551 |
| Our group has investigated the use of dendron-coated maghemite nanoparticles as magnetically recoverable reactors for promoting C-C formations with high regio-selectivity. A 12 nm-sized maghemite nanocrystals were coated with Simanek(melamine)-type dendrons and a Pd catalyst. The dendron molecules served as a “gate” for controlling the accessibility of the reagents towards the surface-immobilized Pd catalyst. By varying the generation of dendron ligands, the ratio of dendron/Pd catalyst, and the size of the nanoparticle core, we could tune up the selectivity of our nano-reactors towards Suzuki cross-coupling reactions. In addition, we were able to recover such magnetic nano-reactors via magnetic concentration for repeated uses. |
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Heterocycles, Aromatics, Metal-Mediated Reactions and Syntheses, Materials, Devices, and Switches
8:00 PM-10:00 PM, Wednesday, 29 March 2006 Georgia World Congress Center -- Ex. Hall B4, Poster
Division of Organic Chemistry |