Synthesis of diindolocarbazoles by Ullmann reaction: a rapid route to ladder oligo (p-aniline) s

S Wakim, J Bouchard, N Blouin, A Michaud…

Index: Wakim, Salem; Bouchard, Jimmy; Blouin, Nicolas; Michaud, Alexandre; Leclerc, Mario Organic Letters, 2004 , vol. 6, # 19 p. 3413 - 3416

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Citation Number: 95

Abstract

New and facile synthesis of symmetric diindolocarbazoles was developed using the copper- catalyzed Ullmann reaction. The key step is a double-intramolecular cyclization reaction realized on N-alkyl-3, 6-dibromo-2, 7-bis (2'aminophenyl) carbazole derivatives which offers the desired symmetric ladder oligo (p-aniline) s. Depending upon the nature of the side- and/or end-groups, well-defined thin films and/or semiladder polymers could be obtained. ...