Synthesis 2008(6): 990-994  
DOI: 10.1055/s-2007-990933
PSP
© Georg Thieme Verlag Stuttgart · New York

Highly Substituted Imidazole Derivatives from a New Four-Component Synthesis Employing Methoxyallene

Maciej Gwiazda, Hans-Ulrich Reissig*
Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
Fax: +49(30)83855367; e-Mail: hans.reissig@chemie.fu-berlin.de;
Further Information

Publication History

Received 14 August 2007
Publication Date:
28 November 2007 (online)

Abstract

A novel four-component reaction of alkoxyallenes with imines, iodine, and nitriles provided highly substituted imidazole derivatives in high overall yields. The simple three step protocol, exemplified by the reaction of methoxyallene (1) with imine 2, acetonitrile, and iodine leading to iodoethenyl imidazole 6 is presented with full experimental detail. Imidazole 6 could be further functionalized by palladium-catalyzed couplings yet offering an entry into diversity-oriented synthesis.

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Several of the imidazole derivatives of type 6 are highly fluorescent: Gwiazda, M.; Reissig, H.-U., unpublished results.