N-Heterocyclic Carbene-Catalyzed Umpolung Formal [3+3] Cycloaddition of Enals with Isatogens: Access to Fused Indolin-3-ones with a Tetrasubstituted Carbon Stereocenter
作者:Junyu Xu、Shihe Hu、Yingyan Lu、Ying Dong、Weifang Tang、Tao Lu、Ding Du
DOI:10.1002/adsc.201401070
日期:2015.3.23
A novel synthetic method to access fused indolin‐3‐ones with a tetrasubstituted carbon stereocenter has been developed via NHC‐catalyzed umpolung formal [3+3] cycloaddtion of enals with isatogens. This methodology could be also applied for the quick construction of the 6‐5‐5 tricyclic pyrrolo[1,2‐a]indole skeleton which is frequently found as a core structure of many indole alkaloids.
通过NHC催化的将烯醇与致病原的烯丙基[3 + 3]环加成反应,开发了一种新的合成方法,可通过四取代碳立体中心获得稠合的吲哚-3-酮。这种方法也可以应用到用于6-5-5三环吡咯的快速施工[1,2一]吲哚骨架,这是经常发现尽可能多的吲哚生物碱的核心结构。