The Wohl-Aue reaction has been used to synthesize several chlorophenazine oxides. These compounds underwent alcoholysis more readily than hydrolysis when treated with aqueous alcoholic alkali, and were reduced to the respective chlorophenazines by means of hot aniline. The halogen-activating effect of amine oxide groups in chlorophenazine oxides has been shown to be primarily one of meta activation. 2-Chlorophenazine itself was found to ...
