Preparation and Reactions of Indoleninyl Halides: Scaffolds for the Synthesis of Spirocyclic Indole Derivatives
作者:John T. R. Liddon、Aimee K. Clarke、Richard J. K. Taylor、William P. Unsworth
DOI:10.1021/acs.orglett.6b03221
日期:2016.12.16
The dearomatization of 2-haloindole precursors allows access to indoleninyl halides, a hitherto underexploited functional handle with broad synthetic utility. Indoleninyl iodides have been shown to react via three distinct modes: hydrolysis, nucleophilic substitution, and cross-coupling. This allows a broad array of functionalized spirocyclic indole derivatives to be generated from a common starting
Total Synthesis of Nostodione A, a Cyanobacterial Metabolite
作者:Andreas Ekebergh、Anna Börje、Jerker Mårtensson
DOI:10.1021/ol303036j
日期:2012.12.21
poison nostodione A is described. The inherent oxidative sensitivity of indoles is utilized for a late introduction of a second carbonyl to the cyclopent[b]indole-2-one system. The tricyclic system is prepared from indole-3-acetic acid and O-silylated 4-ethynylphenol, using a stereoselective intramolecularreductive Heck cyclization as the key transformation.
描述了有丝分裂纺锤体毒力诺二酮A的第一个全合成。吲哚固有的氧化敏感性用于将第二个羰基后期引入到环戊[ b ]吲哚-2-酮体系中。三环系统由吲哚-3-乙酸和O-甲硅烷基化的4-乙炔基苯酚制备,并使用立体选择性分子内还原性Heck环化作为关键转化。
Copper-Catalyzed Trifluoromethylation of Ynones Coupled with Dearomatizing Spirocyclization of Indoles: Access to CF<sub>3</sub>-Containing Spiro[cyclopentane-1,3′-indole]
作者:Chengwen Li、Li Xue、Jiaxin Zhou、Yilin Zhao、Guifang Han、Jingli Hou、Yuguang Song、Yangping Liu
DOI:10.1021/acs.orglett.0c01097
日期:2020.4.17
A one-pot protocol for the Cu(I)-catalyzed difunctionalization of indolyl ynones has been achieved via trifluoromethylation of alkyne followed by dearomatizing spirocyclization of indoles. This cascade process enables constructing diverse CF3 -containing spiro[cyclopentane-1,3'-indole] scaffolds in moderate to excellent yields which have challenging quaternary spirocyclic carbon and tetrasubstituted alkenes.