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An Alternative Procedure for the Synthesis of [5]‐ and [7]Carbohelicenes

2004; Wiley; Volume: 2004; Issue: 7 Linguagem: Inglês

10.1002/ejoc.200300470

1434-193X

Riadh El Abed, Béchir Ben Hassine, Jean‐Pierre Genêt, M. Gorsane, Angéla Marinetti,

Molecular spectroscopy and chirality

Abstract 2‐Bromo[5]helicene derivatives and substituted [7]helicenes have been prepared through a synthetic sequence relying on Heck‐type and photocyclodehydrogenation reactions. This procedure provides a new, versatile and efficient approach to helicene derivatives. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)