A useful ring transformation route to novel thiazepino[7,6- b ]indoles from monochloro-β-lactam-fused 1,3-thiazino[6,5- b ]indoles, analogues of cyclobrassinin
作者:Péter Csomós、Lajos Fodor、Antal Csámpai、Pál Sohár
DOI:10.1016/j.tet.2017.03.047
日期:2017.4
reflux temperature. The selective β-lactam formation can be also achieved in certain cases under milder Staudinger conditions. The treatment of azeto[2,1-b]thiazino[6,5-b]indole-1-one derivatives with sodium ethoxide in ethanol provided the novel thiazepino[7,6-b]indole ring systems in a one-step ring transformation. The structures of the new ring systems were determined by means of IR and NMR spectroscopy
在不同条件下,研究了环花椰菜素植物抗毒素类似物2-芳基-4,9-二氢-1,3-噻嗪[6,5- b ]吲哚的Staudinger烯酮-亚胺环加成反应与氯乙酰氯作为烯酮来源。β-内酰胺环的形成和吲哚部分的N-氯乙酰化均发生。通过在回流温度下在甲醇中在硅胶中存在下进行处理,可以容易地除去吲哚N-氯乙酰基。在某些情况下,在温和的施陶丁格条件下,也可以实现选择性的β-内酰胺形成。azeto [2,1-治疗b ] thiazino [6,5- b ]吲哚-1-酮衍生物在乙醇中与乙醇钠提供的新型硫氮杂[7,6- b一环环中的吲哚环系统。新的环系统的结构通过IR和NMR光谱法确定。