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2005
Phenazine derivatives
R 0570
Efficient Methods for the Synthesis of 2-Hydroxyphenazine Based on the Pd-CatN-Arylation of Aryl Bromides. — A mild method for the efficient synthesis
36- 162 alyzed
of substituted diphenylamines includes Pd(0)-catalyzed N-arylation of o-nitroanilines
or nitro-substituted aryl bromides. The relatively long reaction times (15-50h) can be
dramatically reduced when the reaction is performed under microwave irradiation. Cyclization of diphenylamines (X) by various methods, including the intramolecular
Pd(0)-catalyzed N-arylation, produces 2-methoxyphenazine (XII). — (TIETZE, M.;
IGLESIAS, A.; MERISOR, E.; CONRAD, J.; KLAIBER, I.; BEIFUSS*, U.; Org.
Lett. 7 (2005) 8, 1549-1552; Inst. Chem., Univ. Hohenheim, D-70599 Stuttgart,
Germany; Eng.) — Bartels
2005
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