Strong and Confined Acids Catalyze Asymmetric Intramolecular Hydroarylations of Unactivated Olefins with Indoles
作者:Pinglu Zhang、Nobuya Tsuji、Jie Ouyang、Benjamin List
DOI:10.1021/jacs.0c12042
日期:2021.1.20
asymmetric hydroarylations of activated, electron-poor olefins with activated, electron-rich arenes have been described. In contrast, only a few approaches that can handle unactivated, electronically neutral olefins have been reported and invariably require transition metal catalysts. Here we show how an efficient and highly enantioselective catalytic asymmetric intramolecular hydroarylation of aliphatic
Synthesis of 2-(3′-Indolyl)tetrahydrofurans by Oxidative Cycloetherification
作者:Rachel M. Gillard、Jonathan Sperry
DOI:10.1021/acs.joc.5b00112
日期:2015.3.6
A series of 2-(3'-indolyl)tetrahydrofurans have been prepared by a DDQ-mediated oxidative cycloetherification process. Performing the reaction under biphasic conditions prevents reductive cleavage of the products by the spent oxidant (DDQH(2)).
The first example of the C-3 alkylation of indoles with cyclopropyl ketones promoted by CeCl3·7H2O/LiI
Indoles undergo smooth alkylation with cyclopropyl ketones in the presence of the CeCl3 center dot 7H(2)O/LiI reagent system in refluxing acetonitrile under neutral conditions to produce the corresponding C-3 substituted indole derivatives in good to high yields and with high selectivity. The use of CeCl3 7H(2)O/LiI makes this method simple, convenient, and cost-effective. (C) 2007 Elsevier Ltd. All rights reserved.
A Combined Theoretical and Experimental Investigation into the Highly Stereoselective Migration of Spiroindolenines
作者:Chao Zheng、Qing-Feng Wu、Shu-Li You
DOI:10.1021/jo400365e
日期:2013.5.3
This paper describes a combined theoretical and experimental investigation into the acid-catalyzed migration of spiroindolenines to the corresponding fused cyclic products. It is suggested that the "three-center-two-electron"-type transition state is the crucial reason accounting for the highly stereoselective phenomenon. Further studies demonstrated that the electronic property of the migratory group as well as the ring size may have a major influence on the reaction profile of the migration process. Some predictions based on the computational results were supported by additional experiments.