期刊
DALTON TRANSACTIONS
卷 -, 期 35, 页码 7141-7151出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b909290k
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资金
- EPRSC
- University of York
- Engineering and Physical Sciences Research Council [EP/C522842/1] Funding Source: researchfish
Rhodium and iridium complexes of chiral NHC-phenolimine and NHC-amine ligands have been prepared and studied for asymmetric transfer hydrogenation. X-ray and NMR spectroscopy show that for NHC-phenolimine complexes abstraction of chloride results in a change in ligand coordination from NHC only to chelating NHC-imine. Complexes of NHC-amines are inactive for transfer hydrogenation, whereas complexes of NHC-phenolimines are active at room temperature for a range of aryl containing ketones. Enantioselectivity is very sensitive to the NHC N-substituent resulting in a switch in the predominant enantiomer.
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