amination of cyclic ether with indole/carbazolederivatives has been accomplished by employing copper(II) chloride/bipy as the catalyst system. In the presence of the di-tert-butyl peroxide oxidant, cyclic ethers such as tetrahydrofuran, 1,4-dioxane, and tetrahydropyran successfully undergo C–H/N–H cross dehydrogenative coupling (CDC) with various carbazole or indolederivatives in good-to-excellent yields
Cross-dehydrogenative-coupling (CDC) between C–H/C–H bonds of indoles and cyclic ethers/cycloalkanes is made viable through a simple transition-metal-free pathway. With the aid of only di-tert-butyl peroxide, a number of inactive cyclic ethers and cycloalkanes can be directly coupled with indole derivatives in satisfactory yields.
Regioselective Rh-catalyzed direct carbonylation of indoles to synthesize indole-3-carboxylates
作者:Rui Lang、Junliang Wu、Lijun Shi、Chungu Xia、Fuwei Li
DOI:10.1039/c1cc15143f
日期:——
Rh-catalyzed C–H carbonylation of indoles under 1 atm of CO has been achieved. Various substituted indoles and indole with free N–H could be carboxylated with linear- and/or cyclic-alcohol to give the desired indole-3-carboxylates with up to 92% yield. A mechanism involving RhIII initiated C–H metallation is proposed.
Palladium-Catalyzed Iodine Assisted Carbonylation of Indoles with ClCF2CO2Na and Alcohols
作者:Mengting Cao、Dandan Zuo、Dan Wang、Yafei Li、Jingjing Zhao、Jiajing Tan、Pan Li
DOI:10.1021/acs.joc.4c00110
日期:2024.4.19
iodine-assisted carbonylation reaction of indoles with readily available ClCF2CO2Na and alcohols has been developed. This protocol provides a practical and efficientapproach to highly regioselective indole-3-carboxylates via a preiodination strategy of indoles. Different from classic carbonylation using toxic and difficult-to-handle carbon monoxide, this operationally simple and scalable reaction employed difluorocarbene
已经开发出钯催化的碘辅助吲哚与容易获得的ClCF 2 CO 2 Na和醇的羰基化反应。该协议通过吲哚的预碘化策略提供了一种实用且有效的方法来获得高度区域选择性的吲哚-3-羧酸盐。与使用有毒且难以处理的一氧化碳的经典羰基化不同,这种操作简单且可扩展的反应采用二氟卡宾作为羰基替代物。
A General Method for Palladium-Catalyzed Direct Carbonylation of Indole with Alcohol and Phenol
作者:Rui Lang、Lijun Shi、Dengfeng Li、Chungu Xia、Fuwei Li
DOI:10.1021/ol3017726
日期:2012.8.17
A novel strategy involving a first oxidative iodination and subsequent Pd-0-catalyzed carbonylation to yield indole-3-carboxylate has been developed. It showed perfect generality to indole, alcohol, and phenol. The current methodology could also be conveniently applied to the synthesis of biologically active tropisetron from simple indole and tropine.