Synthesis 2004(15): 2513-2516  
DOI: 10.1055/s-2004-831229
PAPER
© Georg Thieme Verlag Stuttgart · New York

Synthesis of a Configurationally Locked [5]Helicene Derivative

Riadh El Abeda, Béchir Ben Hassine*a, Jean-Pierre Genêt*b, Mohamed Gorsanea, Jonathan Madecb, Louis Ricardc, Angela Marinetti*b
a Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène, Faculté des Sciences de Monastir, Avenue de l’Environnement, 5019 Monastir, Tunisia
b Laboratoire de Synthèse Sélective Organique et Produits Naturels, UMR 7573, E.N.S.C.P. 11, rue Pierre et Marie Curie, 75231 Paris Cedex 06, France
Fax: +33(1)44071062; e-Mail: marinet@ext.jussieu.fr;
c Laboratoire Hétéroéléments et Coordination, Ecole Polytechnique, 91128 Palaiseau Cedex, France
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Publikationsverlauf

Received 26 March 2004
Publikationsdatum:
22. September 2004 (online)

Abstract

The photochemical cyclisation-dehydrogenation of the bis-styrylbenzene 3, where the terminal aryl moieties are connected by a suitable chiral tether derived from 1,3-pentanediol, led to a chiral, configurationally locked [5]helicene derivative. An X-ray diffraction study showed that an (S,S)-configuration of the chiral auxiliary induces a (P)-configuration of the helical framework.