Attempts to the construction of B/C ring and E ring in melotenine A are described. Based on para-dienone chemistry, a tactical application of tandem aminolysis/aza-Michael addition reaction was made to access highly functionalized building blocks with the pyrrolo[2,3-d]carbazole tetracyclic unit (A/B/C/D ring). Albeit negative results for assembling the dihydroazepine unit (E ring) by using the proposed
描述了尝试在蛋
氨酸A中构建B / C环和E环的尝试。基于对-dienone
化学,串联
氨解的战术应用/氮杂Michael加成反应物,以访问高度官能积木与
吡咯并[2,3制成d ]
咔唑四环单元(A / B / C / d环) 。尽管使用拟议的宝石-二卤代
环丙烷的组装反应组装二氢hydro庚因单元(E环)的结果是负面的,但仍提出了一种基于闭环易位的替代策略,以锻造嵌入到环中的具有扭曲的1,3-二烯单元的E环。
肾上腺素A的刚性骨架。