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。
Organocatalytic Asymmetric [2 + 4] Cycloadditions of 3-Vinylindoles with ortho-Quinone Methides
作者:Si-Jia Liu、Man-Su Tu、Kai-Yue Liu、Jia-Yi Chen、Shao-Fei Ni、Yu-Chen Zhang、Feng Shi
DOI:10.3390/molecules26216751
日期:——
Catalytic asymmetric [2 + 4] cycloadditions of 3-vinylindoles with ortho-quinone methides and their precursors were carried out in the presence of chiral phosphoric acid to afford a series of indole-containing chroman derivatives with structural diversity in overall high yields (up to 98%), good diastereoselectivities (up to 93:7 dr) and moderate to excellent enantioselectivities (up to 98% ee). This
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