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phenazine
Sign in to savePhenazine is an organic compound with the formula (C6H4)2N2. It is a dibenzo annulated pyrazine, and the parent substance of many dyestuffs, such as the toluylene red, indulines, and safranines (and the closely related eurhodines). Phenazine crystallizes in yellow needles, which are only sparingly soluble in alcohol. Sulfuric acid dissolves it, forming a deep-red solution.
Article
6 sectionsContents
- Synthesis
- Derivatives
- Aminophenazine
- Natural products
- Biosynthesis
- References
Phenazine is an organic compound with the formula (C6H4)2N2. It is a dibenzo annulated pyrazine, and the parent substance of many dyestuffs, such as the toluylene red, indulines, and safranines (and the closely related eurhodines). Phenazine crystallizes in yellow needles, which are only sparingly soluble in alcohol. Sulfuric acid dissolves it, forming a deep-red solution.
==Synthesis== Classically phenazine are prepared by the reaction of nitrobenzene and aniline in the Wohl–Aue reaction. Other methods include: pyrolysis of the barium salt of azobenzoate oxidation of aniline with lead oxide oxidation of dihydrophenazine, which is prepared by heating pyrocatechin with o-phenylenediamine. oxidation of ortho-aminodiphenylamine with lead peroxide.