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| Type |
Symposium |
| Area |
Recent Trends in Organometallic Chemistry |
| Room No. |
Room 401+402 |
| Time |
FRI 09:40-10:00 |
| Code |
INOR2-3 |
| Subject |
Imidazo[1,5-a]pyridine-derived N-Heterocyclic Carbene Ligands |
| Authors |
Sukwon Hong
Department of Chemistry, Gwangju Institute of Science and Technology, Korea |
| Abstract |
N-heterocyclic carbene (NHC) has emerged as an important ligand in homogeneous catalysis. Imidazo[1,5-a]pyridin-3-ylidene (ImPy) ligands are a rigid bicyclic variant of N-heterocyclic carbenes. ImPy ligands are strong sigma donors as a result of the extended pi-system. Substituents on the bicyclic ImPy can be projected into the metal coordination sphere, often resulting in bonding interactions with the metal center. Synthesis of ImPy precursors is concise and allows late-stage incorporation of diverse functional substituents. We envision that ImPy ligands will provide a versatile framework where a various functional group can be easily implemented to create the optimal electronic and steric environment for catalysis. Several transition metal complexes containing ImPy ligands have been prepared. The ImPy-Cu complexes efficiently catalyzed the direct C-H carboxylation of benzoxazole with CO2. ImPy-Ni catalysts exhibited catalytic activity in acrylate synthesis from ethylene and CO2. ImPy-Ru catalysts exhibited good reactivity in ethenolysis of methyl oleate. Current progress on ImPy transition metal catalysts will be discussed in details in the presentation. |
| E-mail |
shong@gist.ac.kr |
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123rd General Meeting of the KCS