Sc(OTf)<sub>3</sub>-Catalyzed C2-Selective Cyanation/Defluorination Cascade of Perfluoroalkylated 3-Indolylmethanols and Application to the Synthesis of 3-Fluoro(perfluoroalkyl)-β-carbolines
作者:Jingjing Sang、Li Feng、Rui Hu、Jichao Chen、Dandan Shang、Qing Bao、Weidong Rao
DOI:10.1021/acs.orglett.1c02932
日期:2021.10.1
perfluoroalkylated 3-indolylmethanols with TMSCN is described, which provides a novel and practical strategy for the synthesis of structurally diverse 3-(2-cyano)-indolyl substituted gem-difluoroalkenes and β-fluoro-β-perfluoroalkylalkenes. The reaction features excellent regio- and stereoselectivity and broad substrate scope. Notably, the obtained gem-difluoroalkenes and β-fluoro-β-perfluoroalkylalkenes
描述了一种前所未有的 Sc(OTf) 3催化 C2 选择性氰化/脱氟级联的全氟烷基化 3-吲哚甲醇与 TMSCN,这为合成结构多样的 3-(2-氰基)-吲哚基取代的宝石提供了一种新颖实用的策略-二氟烯烃和β-氟-β-全氟烷基烯烃。该反应具有优异的区域和立体选择性和广泛的底物范围。值得注意的是,得到的钆-二氟烯烃和β-氟-β-全氟烷基烯烃可以很容易地转化为3-氟(全氟烷基)-β-咔啉,只需在温和的反应条件下用格氏试剂或DIBAL-H处理即可。