α-ナフトールより出発する2-オキシ-3-アキキル-1,4-ナフトヒノン類の合成 (第2報)
2-オキシ-3-エチル-1,4-ナフトヒノンの合成
1951 年 71 巻 9 号 p. 965-967
詳細
1951 年 71 巻 9 号 p. 965-967
2-Ethyl-α-naphthol was prepared from α-naphthol by acetylation, Fries'rearrangement and the Clemmensen reduction. This was led to an azo dye by coupling, reduced by hyrosulfite and oxidized by sodium bichromate to 2-ethyl-1, 4-naphthoquinone, m.p. 89°. The use of sulfanilic acid, rather than aniline, for diazonium salt, makes for a better reduction by hydrosulfite. The quinone compound was led to 2-hydroxy-3-ethyl-1, 4-naphthoquinone, m.p. 136-138°, by Anderson-Newman's method. This compound yields phthiocol by oxidation with potassium permanganate according to Hooker's method.
