Oxone‐Mediated Oxidative 3‐Arylthio Substitution of Indoles
作者:Guaili Wu、Jing Wu、Jialiang Wu、Longmin Wu
DOI:10.1080/00397910701860174
日期:2008.3.1
Abstract Oxone‐mediated oxidative 3‐arylthio substitution of indoles with benzenethiols in methanol has been succeeded, giving 3‐arylthioindoles. Indoles bearing a 2‐methyl group particularly exhibited higher activities toward 3‐arylthio substitutions. 3‐(2′‐Pyridylthio)indoles used as selective COX‐2 inhibitors were prepared in good to excellent yields.
Electrochemical Sulfenylation of Indoles with Disulfides Mediated by Potassium Iodide
作者:Chen Chen、Pengfei Niu、Zhenlu Shen、Meichao Li
DOI:10.1149/2.0071807jes
日期:——
A novel electrochemical system for sulfenylation of indoles with disulfides to generate 3-sulfenylindoles via C-S bond formation mediated by potassium iodide at a low potential was developed. Iodine was electrogenerated from iodide ions at a graphite anode and showed a high catalytic activity for the electrochemical sulfenylation reactions. A variety of aromatic, heteroaromatic and aliphatic disulfides could react with 2-methlyindole to synthesize the corresponding 3-sulfenylindoles in good to excellent yields. In addition, protected and unprotected indoles with various groups, especially electron-donating groups, also performed well in the sulfenylation reactions. The transformation, which proceeded through the redox of iodine and the generation of intermediate 3-iodoindole, provided an efficient and environmentally benign protocol for the synthesis of 3-sulfenylindoles under mild conditions. (C) 2018 The Electrochemical Society.
Silver-Mediated Sulfenylation of Indoles and Benzimidazoles with Di(hetero)aryl Disulfides
作者:Xi-Cun Wang、Wen-Juan Wang
DOI:10.3987/com-16-13641
日期:——
An efficient synthesis of novel sulfenylated N-heterocycles derivatives via AgNO3 mediated C-S coupling reaction has been developed. This reaction could be carried out under mild reaction conditions with straightforward operation and good yield. A wide range of substrates can be utilized for the C-S coupling reaction giving sulfenylated indoles and benzimidazoles, which are the importance of frameworks in medicinal and synthetic chemistry.