Highly Enantioselective Cyclopropanation of Styrenes with Diazoacetates Catalyzed by Optically Active β-Ketoiminato Cobalt(II) Complexes
- 1 December 1999
- journal article
- research article
- Published by Oxford University Press (OUP) in Chemistry Letters
- Vol. 28 (12), 1345-1346
- https://doi.org/10.1246/cl.1999.1345
Abstract
The highly enantioselective cyclopropanation of styrenes with diazoacetates was achieved using reasonably designed β-ketoiminato cobalt(II) complex catalysts. In the presence of optically active cobalt(II) complexes derived from optically active 1,2-(2,4,6-trimethylphenyl)-1,2-ethylenediamine, the cyclopropanation of styrene with methyl, ethyl, and tert-butyl diazoacetates proceeded to afford the corresponding cyclopropanecarboxylates with 94-96% ee.Keywords
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