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.
A method which avoids metal and halogen for the synthesis of 3-arylthioindoles from indoles and diaryl disulfides using ammonium persulfate in methanol has been presented. Moreover, double C–H sulfenylation of indoles at 2 and 3-positions has also been achieved using iodine and ammonium persulfate.
An iodine-catalyzed regioselective sulfenylation of indoles in the presence of DMSO has been presented. Various indoles can react with aryl thiols or alkyl thiols to afford their corresponding 3-sulfenylindoles in good to excellent yields. The notable features of this protocol include easy operation, metal-free reaction conditions, and excellent functional group tolerance.
Visible-light promoted synthesis of 3-arylthioindoles from indoles and diaryl disulfides
作者:Lin-miao Ye、Jie Chen、Peng Mao、Xue-jing Zhang、Ming Yan
DOI:10.1016/j.tetlet.2017.05.090
日期:2017.7
3-Arylthioindoles could be synthesized in good yields via the photoirradiation of indoles and disulfides. The reaction is efficiently promoted by the catalytic amount of sodium iodide. A reactionmechanism involving the electrophilic substitution of indoles with arylsulfenyl iodine intermediates is suggested.