The selective synthesis of C-2/C-3 aminated five-membered heteroarenes incorporated various functionalities with aniline derivatives in a sustainable way remains an unmet challenge. This protocol presents a practical protocol for the C–H amination of heteroarenes via an electro-oxidative crosscoupling process. This electrosynthetic approach enables a facile access to a wide variety of synthetically
以可持续的方式选择性合成将各种功能与苯胺衍生物结合的 C-2/C-3 胺化五元杂芳烃仍然是一个未解决的挑战。该协议提出了一种通过电氧化交叉耦合过程对杂芳烃进行 C-H 胺化的实用协议。这种电合成方法可以轻松获得各种合成有用的杂芳烃衍生物,耐受范围广泛的官能团,并且适合克级合成。此外,初步的机理研究表明,该胺化反应可能涉及 N 中心自由基和吲哚自由基阳离子之间的自由基交叉偶联过程。
Deciphering reactive intermediates in electrooxidative coupling of indoles through real-time mass spectrometry
作者:Xing Liu、Jianxiong Chen、Zhenwei Wei、Hong Yi、Aiwen Lei
DOI:10.1016/j.chempr.2024.02.020
日期:2024.7
reactive intermediates emerges as an imperative. However, the inherent challenges associated with the discernment and characterization of these transient entities arise from their meager concentrations and ephemeral nature. Herein, we present a cutting-edge floating electrolytic electrospray ionization (FE-ESI) strategy, enabling real-time monitoring and characterizing of short-lived intermediates within
Accessing SuFExable Cyclobutane‐Fused Indolines via Photocatalytic Intermolecular [2+2] Cycloaddition of Indoles
作者:Rongbiao Wei、Guanhua Pei、Yao Huang、Saihu Liao
DOI:10.1002/adsc.202400274
日期:2024.7.16
employing an intermolecular [2+2] cycloaddition reaction between indoles and SuFExable ethenesulfonyl fluoride under triplet energy‐transfer catalysis. This method features mild reaction conditions, metal‐free photocatalysts, and excellent tolerance to various functional groups. Moreover, we demonstrate the feasibility of further modifying the FSO2‐functionalized indoline products via SuFEx click reactions
Cu(II)-Catalyzed Direct and Site-Selective Arylation of Indoles Under Mild Conditions
作者:Robert J. Phipps、Neil P. Grimster、Matthew J. Gaunt
DOI:10.1021/ja801767s
日期:2008.7.1
We have developed a new site-selective Cu(II)-catalyzed C-H bond funtionalization process that can selectively arlate indoles at either the C3 or C2 position under miled conditions. The scope of arylation process is broad and tolerates broad functionality on both indole and aryl unit, which makes it amenable to further elaboartion. The mechanism of the arylation reaction is proposed to proceed via a Cu(III)-aryl that undergoes intial addition at the C3 position of the indole motif. We speculate that site of indole arylation arises through a migration of the Cu(III)-aryl group of C3 to C2, and this can be controlled by the nature of the group on the nitrogen atm; free (NH)-and N-alkylindoles deliver the C3-arylated product, whereas N-acytylindoles affored the C2 isomer, both with excellent yield and selectivity.