A Homo‐Mannich Reaction Strategy Enables Collective Access to Ibophyllidine, <i>Aspidosperma</i>, <i>Kopsia</i>, and <i>Melodinus</i> Alkaloids
作者:Dan Jiang、Peng Tang、Hongbing Xiong、Shuai Lei、Yulian Zhang、Chongzhou Zhang、Ling He、Hanyue Qiu、Min Zhang
DOI:10.1002/anie.202307286
日期:2023.9.11
A homo-Mannich reaction of cyclopropanol with an iminium ion, generated by an asymmetric allylic dearomatization of indole, has been developed to construct a tricyclic hydrocarbazole core. This approach enables a collective asymmetric synthesis of ibophyllidine, Aspidosperma, Kopsia, and Melodinus alkaloids having either a five-, six-, or seven-membered E ring.
环丙醇与吲哚不对称烯丙基脱芳构化产生的亚胺离子的均曼尼希反应已被开发用于构建三环氢咔唑核。这种方法能够集体不对称合成具有五元、六元或七元 E 环的 ibophyllidine、Aspidosperma、Kopsia和Melodinus生物碱。