Synlett 2011(19): 2834-2840  
DOI: 10.1055/s-0031-1289879
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

Stereoselective γ-Olefination of Substituted Cyclobutenediones by Organocatalysis

Mallesh Beesu, Mariappan Periasamy*
School of Chemistry, University of Hyderabad, Hyderabad 500046, A.P., India
Fax: +91(40)23012460; e-Mail: mpsc@uohyd.ernet.in;
Further Information

Publication History

Received 13 August 2011
Publication Date:
11 November 2011 (online)

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.

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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