Proximity effects in diaryl derivatives. Part IV. Base-catalysed reactions of 2,2′-di(hydroxyamino)diaryl sulphones and of 2-(hydroxyamino)aryl phenyl sulphones
作者:M. F. Grundon、B. T. Johnston、W. L. Matier
DOI:10.1039/j29660000260
日期:——
Reaction of 2,2′-di(hydroxyamino)diaryl sulphones with sodium hydroxide in aqueous dioxan at 20° yields dibenzo [b,f][1,4,5]thiadiazepine 5,11,11-trioxides (X), phenazine 5-oxides (XIV), and phenazine 5,10-dioxides (XV). The formation of the phenazine derivatives probably involves disproportionation of the aryl hydroxylamines, followed by Smiles rearrangement, and then loss of the sulphino-group. In
2,2'-二(羟基氨基)二芳基砜与氢氧化钠在二恶烷水溶液中于20°反应生成二苯并[ b,f ] [1,4,5]噻二氮杂5,11,11-三氧化物(X),吩嗪5 -氧化物(XIV)和吩嗪5,10-二氧化物(XV)。吩嗪衍生物的形成可能涉及芳基羟胺的歧化,然后是Smiles重排,然后是磺基的损失。在锌的存在下,芳基羟胺被转化为吩嗪(IV)和噻二氮杂11,11-二氧化物(VII)。鉴于这些结果,讨论了2,2'-二硝基二芳基砜1碱还原的机理。已经报道了一些这项工作。2个