Denitrocyclization in synthesis of dibenzo[b,f][1,4]thiazepin-11(10h)-ones and their derivatives
作者:Alexey V. Smirnov、Levan S. Kalandadze、Vladimir N. Sakharov、Mikhail V. Dorogov、Alexander V. Ivachtchenko
DOI:10.1002/jhet.5570440604
日期:2007.11
A convenient synthesis of the novel dibenzo[b,f][1,4]thiazepin-11(10H)-ones is reported. As a key step, the synthetic route includes intramolecular aromatic denitrocyclization of 2-(2,4-dinitro-phenylsulfanyl)-benzoic acid amides. Efficient procedures for denitrocyclization in the presence of different bases are developed. Reduction of the nitro group in the obtained heterocycles resulted in formation
报道了新型二苯并[ b,f ] [1,4]噻嗪酮-11(10 H)-one的便捷合成。作为关键步骤,合成途径包括2-(2,4-二硝基-苯基硫烷基)-苯甲酰胺的分子内芳族脱硝基环化。开发了在不同碱存在下脱氮环化的有效方法。所得杂环中硝基的还原导致伯胺的形成,其通过用不同的羧酸酰化而转化为酰胺。合成的化合物具有很大的生物活性潜力,是用于生物医学筛选的有用对象。