Synlett 2011(2): 187-190  
DOI: 10.1055/s-0030-1259287
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

Synthesis of the Spirofungin A Core via a Domino Strategy Consisting of Olefinic Ester Ring-Closing Metathesis and Iodospiroacetalization

Jochen Neumaier, Martin E. Maier*
Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
Fax: +49(7071)295137; e-Mail: martin.e.maier@uni-tuebingen.de;
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Publikationsverlauf

Received 18 October 2010
Publikationsdatum:
23. Dezember 2010 (online)

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Abstract

Olefination of ester 26 which was obtained from acid 20 and alkenol 25 using a reduced titanium ethylidene reagent led to cyclic enol ether 28 which could be cyclized by iodospiroacetalization to the spiroacetal core of the antifungal compound spirofungin A (5).