Synthesis 2006(1): 166-181  
DOI: 10.1055/s-2005-921760
FEATUREARTICLE
© Georg Thieme Verlag Stuttgart · New York

Total Synthesis of Terpenoids Isolated from Caulerpale Algae and Their Inhibition­ of Tubulin Assembly

Laurent Commeirasa, Julien Bourdrona,b, Soazig Douillardb, Pascale Barbierb, Nicolas Vanthuynec, Vincent Peyrot*b, Jean-Luc Parrain*a
a UMR-CNRS 6178 SymBio, équipe Synthèse par voie Organométallique, Université Paul Cézanne, Aix-Marseille III, France
Fax: +33(4)91288861; e-Mail: jl.parrain@univ.u-3mrs.fr;
b FRE-CNRS 2737, Interaction entre Systèmes Protéiques dans la Cellule Tumorale, Faculté de Pharmacie, Aix-Marseille II, France
Fax: +33(4)91835505; e-Mail: vincent.peyrot@pharmacie.univ-mrs.fr;
c UMR 6180 ‘Chirotechnologies: Catalyse et Biocatalyse’, Laboratoire de Stéréochimie Dynamique et Chiralité, Université Paul Cézanne, Aix-Marseille III, France
Further Information

Publication History

Received 28 September 2005
Publication Date:
16 December 2005 (online)

Abstract

Total synthesis of four analogue terpenoids isolated from Caulerpa taxifolia was achieved in good yield with a total control of each double bond. Biological tests to compare the activities of in vitro tubulin polymerisation between the natural caulerpenyne and the synthetic caulerpenyne and its derivatives were also performed.

28

Compound 24 was obtained as a separable mixture with the isomer resulting from an acylotropy of the primary acetate function. Using tetrabutylammonium fluoride as a deprotecting agent, acylotropy reaction largely occurred, providing a mixture of mono-, di- and triacetate isomers of 24.

37

The optical signs of iso-caulerpenyne, dihydrorhipocephalin and iso-dihydrorhipocephalin are those observed by the on-line circular dichroism at 220 nm of the products in the solvent used for the chromatographic separation.