CuCl2/TBHP-mediated direct chlorooxidation of indoles
摘要:
CuCl2/TBHP-mediated direct chlorooxidation of indole derivatives under simple aerobic conditions was reported, leading to facile preparations of a range of 3,3-disubstituted 3-chlorooxindoles in good yields and selectivities. (C) 2015 Elsevier Ltd. All rights reserved.
Access to Spirocyclized Oxindoles and Indolenines via Palladium-Catalyzed Cascade Reactions of Propargyl Carbonates with 2-Oxotryptamines and Tryptamines
作者:Antoinette E. Nibbs、Thomas D. Montgomery、Ye Zhu、Viresh H. Rawal
DOI:10.1021/acs.joc.5b00277
日期:2015.5.15
through a process wherein the first nucleophilic unit on the oxindole or indole reacts with an allenyl-palladium species, formed from oxidative addition of Pd(0) to propargyl carbonates, to generate a π-allyl palladium intermediate that then reacts further with the second nucleophilic component of the oxindole or indole. The cascade process forges two bonds en route to spirocyclized oxindole and indolenine
Synthesis of 3-substituted 8,9-didehydroazepino[4,5-b]indolines via ring expansion reaction of pyrroloindolines
作者:Fu-Sheng Wang、Dan Zhang、Chen Kong、Yong Qin
DOI:10.1016/j.tetlet.2011.04.061
日期:2011.6
An unexpected ringexpansion reaction was observed to give the 3-substituted 8,9-didehydroazepinoindolines when 3-substituted pyrroloindolines reacted with electron-deficient acetylenes in the presence of catalytic amount of CuI. The ringexpansion reaction proceeded via a three-step one-pot cascade pathway of aza-Michael-addition/ring-opening/iminium-cyclization.
Synthesis of pyrroloindolines and furoindolines via cascade dearomatization of indole derivatives with carbenium ion
作者:Chuan Liu、Qin Yin、Li-Xin Dai、Shu-Li You
DOI:10.1039/c5cc00780a
日期:——
Intermolecular cascade dearomatization of substituted indoles with benzodithiolylium tetrafluoroborate has been developed, providing C3 methyl-substituted pyrroloindolines and furoindolines.
metal–catalyzed asymmetric allylicsubstitution reactions are well known for installing stereocenters adjacent to branched or E-linear olefins. However, analogous reactions for the synthesis of optically active Z-olefin products are rare. Here we report iridium-catalyzed asymmetric allylicsubstitution reactions that retain Z-olefin geometries while establishing an adjacent quaternary stereocenter. The formation
An Efficient Synthesis of a (−)-Physostigmine's Library for Identifying Potential Anti-Alzheimer's Agents
作者:Yi Wu、Fusheng Wang、Hao Song、Yong Qin
DOI:10.1002/hlca.201100020
日期:2011.8
An efficient route for the synthesis of (−)‐physostigmine analogs 1a–1g and 2a–2k is described. Analogs 1a–1g were synthesized via copper(I)‐catalyzed cycloaddition between the optically pure azide 10 and a variety of alkynes. Similarly, analogs 2a–2k were prepared through ‘three‐component Huisgen cycloaddition’ using various amines, propargyl bromine, and 10 in H2O. Facile preparation of 10 via MacMillan's