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|Section2= |Section3= }} Phenazine (C12H8N2 or C6H4N2C6H4), also called azophenylene, dibenzo-p-diazine, dibenzopyrazine, and acridizine, 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).〔Horst Berneth "Azine Dyes" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. 〕 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. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Phenazine」の詳細全文を読む スポンサード リンク
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