2-propargylbenzamide, respectively. The construction of the isoquinolinone lactam system followed by performing a selective Schmidt reaction for isoxazolidine derivatives (two steps overall), whereas the isoxazole lactams were reached via an Ullmann-type cyclisation (three steps overall). Key observations were made regarding the stereo- and regioselectivities of the reactions employed, and small libraries of
异恶唑烷、
异恶唑和
异喹啉酮环存在于几种
天然产物和/或药学上感兴趣的化合物的结构中。在这项工作中,已经开发了简便有效的途径来制备带有这些杂环的稠合框架。
异恶唑烷/
异喹啉酮和
异恶唑/
异喹啉酮杂化合成的成功方法最初依赖于硝酮和氧化腈分别与
茚酮和2-炔丙基苯甲酰胺的1,3-偶极环加成。构建
异喹啉酮内酰胺系统,然后对
异恶唑烷衍
生物进行选择性施密特反应(总共两步),而
异恶唑内酰胺是通过乌尔曼型环化得到的(总共三步)。对所用反应的立体和区域选择性进行了关键观察,并制备了目标杂交体的小型文库,证明了这些策略的普遍适用性。