Synlett 2007(15): 2351-2354  
DOI: 10.1055/s-2007-985601
LETTER
© Georg Thieme Verlag Stuttgart · New York

Stereoselective Synthesis of the C(53)-C(67) Polyene Fragment of Amphidinol 3

Françoise Colobert*a, Thomas Kreuzera, Janine Cossyb, Sébastien Reymondb, Tomoki Tsuchiyab, Laurent Ferriéb, Istvan E. Markoc, Pierre Jourdainc
a Laboratoire de Stéréochimie, Université Louis Pasteur (ECPM), CNRS, 25 Rue Becquerel, 67087 Strasbourg Cedex 2, France
Fax: +33(3)90242742; e-Mail: fcolober@chimie.u-strasbg.fr;
b Laboratoire de Chimie Organique, ESPCI, CNRS, 10 Rue Vauquelin, 75231 Paris Cedex 05, France
c Département de Chimie, Bâtiment Lavoisier, Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
Further Information

Publication History

Received 4 June 2007
Publication Date:
22 August 2007 (online)

Abstract

A stereoselective synthesis of the polyene fragment C(53)-C(67) of amphidinol 3 is described using a sequence of ­reduction, benzoylation, and reductive elimination for the ­stereospecific preparation of the polyene motif as key steps starting from acetylenic precursors.

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The all-trans configuration of the triene moiety was confirmed by performing 1H NMR irradiation experiments on the corresponding symmetrical diol, which is easily available by deprotection of the silyl groups starting from diol 14. The analysis of 1H-decoupled NMR spectra resulted in a coupling constant consistent with E-olefins (J = 14.1 Hz).