Efficient methods for the synthesis of 2-hydroxyphenazine based on the Pd-catalyzed N-arylation of aryl bromides

M Tietze, A Iglesias, E Merisor, J Conrad, I Klaiber…

Index: Tietze, Mario; Iglesias, Alberto; Merisor, Elena; Conrad, Juergen; Klaiber, Iris; Beifuss, Uwe Organic Letters, 2005 , vol. 7, # 8 p. 1549 - 1552

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Citation Number: 41

Abstract

Substituted diphenylamines can be synthesized by Pd (0)-catalyzed N-arylation using o- nitroanilines and nitro-substituted aryl bromides for a substrate. Cyclization of the diphenylamines by various methods, including the intramolecular Pd (0)-catalyzed N- arylation, produces 2-methoxyphenazine which can easily be deprotected to give 2- hydroxyphenazine. This phenazine is required to synthesize methanophenazine, a novel ...

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