74682-49-8Relevant academic research and scientific papers
Oxidative Coupling of CH-acid Compounds with p-Phenylenediamines. VIII. Synthesis of 5H-Benzophenothiazin-5-ones from Naphth1,3-oxathiol-2-ones
Mann, G.,Wilde, H.,Hauptmann, S.,Lehmann, J.,Naumann, M.,Lepom, P.
, p. 785 - 792 (2007/10/02)
Reaction of 5-hydroxynaphth1,3-oxathiol-2-ones with N,N-diethyl-quinone-1,4-diimine leads to 5H-benzophenothiazin-5-ones 1-21.The same dyes are available by use of p-substituted nitrosobenzenes in acetic acid, or in methanol in the presence of oxygen acceptors.The mechanisms of dye formation are discussed.
