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Synlett 2011(19): 2834-2840
DOI: 10.1055/s-0031-1289879
DOI: 10.1055/s-0031-1289879
LETTER
© Georg Thieme Verlag
Stuttgart ˙ New York
Stereoselective γ-Olefination of Substituted Cyclobutenediones by Organocatalysis
Further Information
Received
13 August 2011
Publication Date:
11 November 2011 (online)
Publication History
Publication Date:
11 November 2011 (online)
![](https://www.thieme-connect.de/media/synlett/201119/lookinside/thumbnails/10.1055-s-0031-1289879-1.jpg)
Abstract
Methods are described for the stereoselective synthesis of alkenyl-substituted cyclobutenediones from alkyl-substituted cyclobutenediones and aldehydes in 70-91% yields using pyrrolidine as catalyst under mild reaction conditions.
Key words
cyclobutenediones - γ-olefination - organocatalysis
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References and Notes
CCDC 809408 (3a), 809409 (3k), and 809407 (4a) contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif