Color reaction of benzaldehyde with 1-naphthol in concentrated sulfuric acid.
作者:MATAJIRO KOYAMA、ATSUSHI TAKADA、TAKEO UEDA
DOI:10.1248/cpb.30.3239
日期:——
The color reaction of benzaldehyde with 1-naphthol in concentrated sulfuric acid was investigated to clarify the reaction mechanism. Two reaction products, bis (4-hydroxy-1-naphthyl) phenylmethane and (4-hydroxy-1-naphthyl) (1-hydroxy-2-naphthyl) phenylmethane were isolated from the colored reaction mixture. These compounds were found to be the key intermediates to the colored species, since their colored solutions in concentrated sulfuric acid showed the same absorption maxima as the colored solution obtained from the reaction of benzaldehyde with 1-naphthol in the acid. The compounds were considered to be transformed into the cation radicals, which were responsible for the colorations.
研究了苯甲醛与 1-萘酚在浓硫酸中的颜色反应,以弄清反应机理。从有色反应混合物中分离出了两种反应产物,双(4-羟基-1-萘基)苯基甲烷和(4-羟基-1-萘基)(1-羟基-2-萘基)苯基甲烷。由于这些化合物在浓硫酸中的有色溶液与苯甲醛与 1-萘酚在酸中反应得到的有色溶液显示出相同的吸收最大值,因此这些化合物被认为是有色物种的关键中间体。这些化合物被认为转化成了阳离子自由基,而阳离子自由基是造成着色的原因。