An efficient stereocontrolled route to the 1-azaspiro[5.5]undecan framework of the histrionicotoxin alkaloids, employing anodic cyanation and Thorpe-Ziegler cyclization as key steps, is described. In the process of gaining information concerning the hydrolysis of the cyanoenamine function in 8, an unexpected intramolecular Friedel-Crafts type reaction provided the aza-fluorene 10.
描述了一种通过阳极
氰化和索普-齐格勒环化作为关键步骤,获得 1-氮杂螺[5.5]
十一烷骨架的组曲毒素
生物碱的有效立体控制途径。在获得有关 8 中
氰烯胺官能团
水解的信息的过程中,一个意想不到的分子内 Friedel-Crafts 型反应提供了氮杂
芴10。