Proximity effects in diaryl derivatives. Part III. The formation of phenazines and dibenzothiadiazepines by reduction of 2,2′-dinitrodiaryl sulphides, sulphoxides, and sulphones
作者:M. F. Grundon、B. T. Johnston
DOI:10.1039/j29660000255
日期:——
Reduction of 2,2′-dinitrodiaryl sulphides, sulphoxides, and sulphones with zinc and sodium hydroxide in aqueous dioxan afforded phenazines (V), dibenzo[b,f][1,4,5]thiadiazepines (IV; X = S or SO2), dibenzo[b,f][1,4,5]-thiadiazepine N-oxides, and other products. Phenazines arise by intramolecular nucleophilic rearrangement of a partially reduced species, followed by loss of the sulphur-containing group
在二恶烷水溶液中用锌和氢氧化钠还原2,2'-二硝基二芳基硫醚,亚砜和砜,得到吩嗪(V),二苯并[ b,f ] [1,4,5]噻二氮杂(IV; X = S或SO 2),二苯并[ b,f ] [1,4,5]-噻二氮杂N-氧化物和其他产物。吩嗪通过部分还原物种的分子内亲核重排而产生,然后丢失含硫基团。关于2-氨基-2'-硝基二苯砜和二苯并噻二氮杂卓衍生物的还原的研究表明,这些化合物不是吩嗪形成的中间体。