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Synlett 2015; 26(08): 1111-1115
DOI: 10.1055/s-0034-1380265
DOI: 10.1055/s-0034-1380265
letter
Enantioselective Michael Addition Catalyzed by an Optically Active 1-Chlorovinyl Cobalt(III) Complex
Further Information
Publication History
Received: 17 December 2014
Accepted after revision: 01 February 2015
Publication Date:
09 March 2015 (online)
Abstract
The optically active 1-chlorovinyl cobalt(III) complex was prepared from the ketoiminatocobalt(II) complex upon treatment with sodium borohydride in the presence of 1,1,1-trichloroethane. The obtained complex was found to catalyze the enantioselective Michael addition of various malonates on cyclic or acyclic enones to afford the corresponding adduct. In this reaction, the use of sodium alkoxide as a base with 1-chlorovinyl cobalt(III) complex catalyst was crucial to improving both the reactivity and enantioselectivity.
Supporting Information
- Supporting information for this article is available online at http://dx.doi.org/10.1055/s-0034-1380265.
- Supporting Information
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