Rhodium-Catalyzed Diastereo- and Enantioselective Tandem Spirocyclization/Reduction of 3-Allenylindoles: Access to Functionalized Vinylic Spiroindolines
作者:Christian P. Grugel、Bernhard Breit
DOI:10.1021/acs.orglett.9b03835
日期:2019.12.6
A highly selective rhodium-catalyzed tandem spirocyclization/reduction of 3-allenylindoles is reported. By employing a Hantzsch ester as reductant, vinylic spiroindolines are obtained in excellent yields as well as diastereo- and enantioselectivity. In addition, the reaction’s synthetic utility is highlighted by broad functional group compatibility and exemplified by a gram scale reaction with subsequent
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.
Rhodium-Catalyzed Stereoselective Cyclization of 3-Allenylindoles and <i>N</i>-Allenyltryptamines to Functionalized Vinylic Spiroindolenines
作者:Antonia Becker、Christian P. Grugel、Bernhard Breit
DOI:10.1021/acs.orglett.1c01234
日期:2021.5.7
Synthesis of cyclohepta[b]indoles via gold mediated energy transfer photocatalysis
作者:Yuan Zhao、Vladislav A. Voloshkin、Ekaterina A. Martynova、Bholanath Maity、Luigi Cavallo、Steven P. Nolan
DOI:10.1039/d4cc00379a
日期:——
Gold photocatalyst has been employed as sensitizer for the synthesis of cyclohepta[b]indoles. Substrate scope and limitations of the protocol are presented. Mechanistic studies indicate involvement of EnT-HAT mechanism.