metal–catalyzed asymmetric allylicsubstitution reactions are well known for installing stereocenters adjacent to branched or E-linear olefins. However, analogous reactions for the synthesis of optically active Z-olefin products are rare. Here we report iridium-catalyzed asymmetric allylicsubstitution reactions that retain Z-olefin geometries while establishing an adjacent quaternary stereocenter. The formation
Copper-Catalyzed Intermolecular Asymmetric Propargylic Dearomatization of Indoles
作者:Wen Shao、He Li、Chuan Liu、Chen-Jiang Liu、Shu-Li You
DOI:10.1002/anie.201503042
日期:2015.6.22
The first copper‐catalyzed intermolecular dearomatization of indoles by an asymmetric propargylic substitution reaction was developed. This method provides a highly efficient synthesis of versatile furoindoline and pyrroloindoline derivatives containing a quaternary carbon stereogenic center and a terminal alkyne moiety with up to 86 % yield and 98 % ee.
Oxazoline-/Copper-Catalyzed Alkoxyl Radical Generation: Solvent-Switched to Access 3a,3a′-Bisfuroindoline and 3-Alkoxyl Furoindoline
作者:Hai Ren、Jun-Rong Song、Zhi-Yao Li、Wei-Dong Pan
DOI:10.1021/acs.orglett.9b02394
日期:2019.9.6
We report the first example of oxazoline-/copper-catalyzed alcohol oxidation to generate the alkoxylradical under additive-free conditions. The resulting alkoxylradical addition to alkene enables useful C-O bond-forming and selective C(sp3)-C(sp3) radical-radical dimerization/radical-trapping reactions, providing direct access to the 3a,3a'-bisfuro[2,3-b]indoline scaffold for the first time and a
Cascade dearomatization of N-substituted tryptophols via Lewis acid-catalyzed Michael reactions
作者:Chuan Liu、Wei Zhang、Li-Xin Dai、Shu-Li You
DOI:10.1039/c2ob26139a
日期:——
Lewisacid-catalyzed cascade dearomatization of N-substituted tryptophols via Michael addition reaction was developed. The generality of the method has been demonstrated by the synthesis of versatile furoindoline derivatives with a quaternary carbon center in good yields.