A Photoredox‐Induced Stereoselective Dearomative Radical (4+2)‐Cyclization/1,4‐Addition Cascade for the Synthesis of Highly Functionalized Hexahydro‐1
<i>H</i>
‐carbazoles
作者:Dirk Alpers、Malte Gallhof、Julian Witt、Frank Hoffmann、Malte Brasholz
DOI:10.1002/anie.201610974
日期:2017.1.24
synthesis of functionalized hexahydrocarbazoles was developed based on an unprecedented photoredox‐induced dearomative radical (4+2)‐cyclization/1,4‐addition cascade between 3‐(2‐iodoethyl)indoles and acceptor‐substituted alkenes. The title reaction simultaneously generates three C−C bonds and one C−H bond, along with three contiguous stereogenic centers. The hexahydro‐1H‐carbazole products are highly valuable
基于前所未有的光氧化还原诱导的3–(2-碘乙基)吲哚与受体取代的烯烃之间的脱氧自由基(4 + 2)-环化/ 1,4-加成级联反应,开发了功能化六氢咔唑的立体选择性合成方法。标题反应同时生成三个C-C键和一个C-H键,以及三个连续的立体中心。六氢-1 H-咔唑产品是合成新型抗生素以及多环吲哚啉生物碱的非天然环同源物的极有价值的中间体。