Synlett 2006(11): 1691-1694  
DOI: 10.1055/s-2006-944225
LETTER
© Georg Thieme Verlag Stuttgart · New York

Synthetic Studies towards (-)-Lemonomycin, Synthesis of Fused Tetracycles

Cédric Couturiera, Thierry Schlamab, Jieping Zhu*a
a Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
b Société Rhodia, Centre de Recherches de Lyon, 69192 Saint-Fons Cedex, France
Fax: +33(1)69077247; e-Mail: zhu@icsn.cnrs-gif.fr;
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Publikationsverlauf

Received 21 March 2006
Publikationsdatum:
04. Juli 2006 (online)

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Abstract

The asymmetric synthesis of 1,3-lactol-bridged tetrahydroisoquinoline 5 is developed. Subsequent cyclization of 5 under acidic conditions leads to the formation of a tricyclic enamide 22, which is in turn converted to a tetracyclic compound 23.