Enantioselective Domino Reaction of 3-Vinylindole and <i>p</i>-Quinone Methides Enabled by Chiral Imidodiphosphoric Acids: Asymmetric Synthesis of Multisubstituted 3-Indolyl Cyclopenta[<i>b</i>]indoles
development of a stereoselective method for the rapid assembly of structurally complex molecules remains fascinating and challenging in synthetic organic chemistry. Here, we report an enantioselective domino reaction between 3-vinylindole and p-quinone methide for the preparation of 3-indolyl cyclopenta[b]indoles containing multiple chiral centers. Chiral imidodiphosphoric acids enable this cascade asymmetric
Diastereo- and Enantioselective Construction of Dihydrobenzo[<i>e</i>]indole Scaffolds via Catalytic Asymmetric [3 + 2] Cycloannulations
作者:Can Li、Dan-Ni Xu、Chun Ma、Guang-Jian Mei、Feng Shi
DOI:10.1021/acs.joc.8b01217
日期:2018.8.17
The first catalytic asymmetric construction of chiral dihydrobenzo[e]indole scaffolds has been established in a highly diastereo- and enantioselective mode (30 examples, up to 99% yield, >95:5 dr, >99% ee), which makes use of chiral phosphoric acid-catalyzed [3 + 2] cycloannulations of azonaphthalene derivatives with 3-vinylindoles. This reaction also represents the first catalytic asymmetric cycloannulation
手性二氢苯并[ e ]吲哚骨架的第一个催化不对称结构已经建立在高度非对映和对映选择性的模式下(30个实例,产率高达99%,> 95:5 dr,> 99%ee),它利用了手性磷酸与3-乙烯基吲哚的偶氮萘衍生物的[3 + 2]环环化反应。该反应也代表了氮杂萘衍生物与烯烃的首次催化不对称环环化,这不仅为构建对映体富集的二氢苯并[ e ]吲哚骨架提供了有用的方法,而且还促进了氮杂萘衍生物催化不对称反应的化学反应。
Highly efficient [3 + 2] reaction of 3-vinylindoles with 3-indolylmethanols by Brønsted-acid catalysis
This paper describes a highly efficient [3 + 2] reaction between 3-vinylindoles and 3-indolylmethanols. Novel 2,3-bisindolylmethanes were prepared as single diastereoisomers in high yields with the promotion of 1 mol% 2-hydroxy-3,5-dinitrobenzoic acid.
Construction of chiral chroman scaffolds <i>via</i> catalytic asymmetric (4 + 2) cyclizations of <i>para</i>-quinone methide derivatives with 3-vinylindoles
作者:Shu-Fang Wu、Man-Su Tu、Qing-Qing Hang、Shu Zhang、Haixia Ding、Yu-Chen Zhang、Feng Shi
DOI:10.1039/d0ob01049a
日期:——
derivatives with 3-vinylindoles has been established in the presence of chiral phosphoric acid, which provides a series of chiralchroman derivatives bearing an indole moiety in generally high yields (up to 97%), and with good enantioselectivities (up to 90% ee) and moderate to good diastereoselectivities (up to 95 : 5 dr). This reaction has not only fulfilled the need of developing catalytic asymmetric
Catalytic Asymmetric [3+2] Cycloadditions of C-3 Unsubstituted 2-Indolylmethanols: Regio-, Diastereo- and Enantioselective Construction of the Cyclopenta[<i>b</i>]indole Framework
作者:Zi-Qi Zhu、Yang Shen、Xiao-Xue Sun、Ji-Yu Tao、Jin-Xi Liu、Feng Shi
DOI:10.1002/adsc.201600931
日期:2016.12.7
The first catalyticasymmetric [3+2] cycloaddition of 2‐indolylmethanols with 3‐vinylindoles has been established, which makes use of C‐3 unsubstituted 2‐indolylmethanol as a C3 building block in the presence of a chiral phosphoric acid. By using this strategy, biologically important cyclopenta[b]indole frameworks were efficiently constructed with regiospecificity in high yields (up to 99%), excellent