通过使用可商购的简单K 2 CO 3 / I 2试剂组合,可以实现多种唑类的直接C2-H氧化和亚胺化。碘化唑加成物,产生通过所述原位生成N-杂环碳烯的,为C2-H氧化,亚胺化,和唑类的胺化的关键中间体。重要的是,这些反应在温和的条件下以高至优异的产率进行,可扩展至大量并显示出广泛的底物范围。有趣的是,这种直接的C2-H胺化方法使我们能够获得各种具有药理活性的N 6-烷基或N 6芳基取代的苯并咪唑并喹唑啉酮骨架通过分子内CH串联进行一锅反应。
A copper catalyzed three-component reaction was developed for the synthesis of benzothiazolones. In the presence of CuBr2, the reaction of o-iodoanilines and K2S with DMF proceeded smoothly and generated the corresponding benzothiazolones with good isolated yields. DMF functioned both as the carbon monoxide source and as the reaction medium in this reaction.