Rhodium-Catalyzed Enantioselective Cyclization of 3-Allenyl-indoles: Access to Functionalized Tetrahydrocarbazoles
作者:Christian P. Grugel、Bernhard Breit
DOI:10.1021/acs.orglett.9b01721
日期:2019.8.2
A highly selective rhodium-catalyzedcyclization of tethered 3-allenylindoles is reported. In a smooth reaction, 1-vinyltetrahydrocarbazoles are obtained in excellent yields and enantioselectivities. Aside from a great functional group tolerance, this method requires neither the Schlenk technique nor the use of anhydrous solvents. Preliminary mechanistic investigations proved that the reaction proceeds
Enantioselective Synthesis of Spiro Cyclopentane-1,3′-indoles and 2,3,4,9-Tetrahydro-1H-carbazoles by Iridium-Catalyzed Allylic Dearomatization and Stereospecific Migration
作者:Qing-Feng Wu、Chao Zheng、Shu-Li You
DOI:10.1002/anie.201107677
日期:2012.2.13
Rings with a twist: The highly enantioselective construction of five‐membered spiroindolenines has been realized by the iridium‐catalyzed intramolecularallylicdearomatization of indoles. The stereospecific migration of these spiro cyclopentane‐1,3′‐indole products provides enantioenriched 2,3,4,9‐tetrahydro‐1H‐carbazoles.
Chiral Brønsted Acid-Catalyzed Intramolecular Asymmetric Allylic Alkylation of Indoles with Primary Alcohols
作者:Lei-Ming Zou、Xian-Yun Huang、Chao Zheng、Yuan-Zheng Cheng、Shu-Li You
DOI:10.1021/acs.orglett.2c01253
日期:2022.5.20
Herein, chiral Brønsted acid-catalyzed intramolecularasymmetricallylicalkylation of indoles with allylic primary alcohols is described. The allyl alcohols were directly employed as the allylic precursors in this metal-free protocol, without preactivation or any additional activating reagents. This method provides the convenient synthesis of a broad range of functionalized tetrahydrocarbazoles in