Optically Active Cationic Cobalt(III) Complexes: Highly Efficient Catalysts for Enantioselective Hetero Diels–Alder Reaction
- 1 July 2000
- journal article
- Published by Oxford University Press (OUP) in Chemistry Letters
- Vol. 29 (7) , 824-825
- https://doi.org/10.1246/cl.2000.824
Abstract
Optically active β-ketoiminato cobalt(III) complexes were developed for use as effective catalysts of the enantioselective hetero Diels–Alder reaction of aryl and alkyl aldehydes with 1-methoxy-[3-(tert-butyldimethylsilyl)oxy]-1,3-butadiene. In the presence of 5 mol% cationic cobalt(III) triflate complexes derived from optically active 1,2-bis(3,5-dimethylphenyl)-1,2-ethylenediamine, the hetero Diels–Alder reaction of p-nitro- benzaldehyde proceeded in 94% yield with 94% ee.Keywords
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