Synlett 2002(10): 1681-1682
DOI: 10.1055/s-2002-34217
LETTER
© Georg Thieme Verlag Stuttgart · New York

Iridium Complex-Catalyzed Enantioselective Intramolecular [4+2] Cycloaddition of Dieneynes

Takanori Shibata*, Koji Takasaku, Yuri Takesue, Naohito Hirata, Kentaro Takagi
Department of Chemistry, Faculty of Science, Okayama University, Tsushima, Okayama 700-8530, Japan
e-Mail: tshibata@cc.okayama-u.ac.jp;
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Publikationsverlauf

Received 2 August 2002
Publikationsdatum:
23. September 2002 (online)

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Abstract

A catalytic and highly enantioselective intramolecular [4+2] cycloaddition of dieneynes was achieved by use of chiral iridium complex prepared in situ from [IrCl(cod)]2 and BDPP [2,4-bis(diphenylphosphino)pentane]. The reaction proceeded in refluxed tert-butyl acetate to give chiral cyclohexa-1,4-dienes in very high enantiomeric excess.