A Simple and Efficient One-Step Synthesis of 2,4,10a-Triaryl-1,10a-Dihydro-2H-Pyrazino[2,1-b][1,3] Benzothiazoles Catalyzed by p-Toluene Sulfonic Acid

Reaction of 2‐[(2‐Oxo‐2‐arylethyl)anilino]‐1‐aryl‐1‐ethanones with o‐phenylenediamine: Formation of quinoxalines

“…In continuation of our work [2] on the chemistry of bis(aroylmethyl)anilines, which is relatively unexplored [3], herein, we report the condensation reaction of bis(aroylmethyl)anilines with 1,2‐diaminobenzene. The reaction of diphenacyl aniline with 2‐aminophenol and 2‐aminothiophenol has led to diazine‐fused benzheteroazole derivatives [4] (Fig. 1).…”