Synthesis of Spiroindolenines by Iodine‐Mediated Dearomative Aza‐Spirocyclization of Indoles
作者:Zongxiang Zhao、Huilin Qiu、Junbiao Chang、Wenquan Yu
DOI:10.1002/adsc.202400046
日期:2024.4.23
A transition‐metal‐free dearomative aza‐spirocyclization reaction of 2,3‐disubstituted indoles is established by using molecular iodine under basic conditions. The required substrates were prepared via sequential Fisher indole synthesis and sulfonylation. This dearomatization reaction is amenable to gram‐scale synthesis, and provides access to various spiroindolenine derivatives from indole sulfonamide
在碱性条件下使用分子碘建立了 2,3-二取代吲哚的无过渡金属脱芳香氮杂螺环化反应。通过连续的费舍尔吲哚合成和磺酰化制备所需的底物。这种脱芳构化反应适合克级合成,并提供从吲哚磺酰胺前体获得各种螺吲哚衍生物的途径。