NDLI: Dual Catalyst Control in the Chiral Diamine-Dipeptide-Catalyzed Asymmetric Michael Addition

Content Provider	Scilit
Author	Tsogoeva, Svetlana B. Jagtap, Sunil B.
Copyright Year	2004
Description	By example of conjugate addition of 2-nitropropane to 2-cyclohexen-1-one, it is shown that the combination of H-Leu-His-OH and (1R,2R)-(+)-1,2-diphenylethylenediamine as co-catalysts in a suitable ratio can lead to a new catalytic system for the C-C bond formation reactions. Although neither co-catalyst is sufficiently effective independently in terms of yield or enantioselectivity, their combination results in a drastic increase in yields (up to 86%) and absolute selectivities (up to 91% ee).
Related Links	http://www.thieme-connect.de/products/ejournals/pdf/10.1055/s-2004-834830.pdf
Ending Page	2626
Page Count	3
Starting Page	2624
ISSN	09365214
e-ISSN	14372096
DOI	10.1055/s-2004-834830
Journal	Synlett
Issue Number	14
Volume Number	2004
Language	English
Publisher	Georg Thieme Verlag KG
Publisher Date	2004-10-20
Access Restriction	Open
Subject Keyword	Journal: Synlett Organic Chemistry Asymmetric Organocatalysis Michael Additions
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry

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Dual Catalyst Control in the Chiral Diamine-Dipeptide-Catalyzed Asymmetric Michael Addition