developed for the synthesis of phenazines by cross-coupling of benzoquinones with o-phenylenediamines. Benzoquinones and o-phenylenediamines reacted smoothly to give the corresponding cross-coupled products in good to excellent yields. 1,4-Naphthoquinone also coupled with o-phenylenediamines in the presence of copper acetate at 50 °C to give the corresponding benzo[a]phenazines. All reactions could be carried
已经开发了一种温和、简单和通用的方法,用于通过苯醌与邻苯二胺的交叉偶联合成吩嗪。苯醌和邻苯二胺反应平稳,得到相应的交叉偶联产物,产率良好至极好。在乙酸铜存在下,1,4-萘醌也与邻苯二胺在 50 °C 下偶联,得到相应的苯并 [a] 吩嗪。所有反应都可以在空气中进行。