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.
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.
The direct 3-arylthiolation of indoles with aromatic thiols has been achieved in the presence of Selectfluor™ under mild conditions to produce 3-arylthioindoles in relatively good to excellent yields and with high selectivity. This method is effective even with 2-unsubstituted indoles.
The direct sulfenylation of indoles with aromatic thiols has been accomplished in the presence of 20 mol% of FeCl3 in refluxing acetonitrile to produce 3-arylthioindoles in relatively good to excellent yields and with high selectivity. This method works even with 2-unsubstituted indoles. thiolation - indoles - thiols - 3-arylthioindoles
An efficient Cs2CO3‐catalyzedoxidativecoupling of thiols with phosphonates and arenes that uses molecular oxygen as the oxidant is described. These reactions provide not only a novel alkali metal salt catalyzed aerobic oxidation, but also an efficient approach to thiophosphates and sulfenylarenes, which are ubiquitously found in pharmaceuticals and pesticides. The reaction proceeds under simple and
描述了使用分子氧作为氧化剂的高效Cs 2 CO 3催化的硫醇与膦酸酯和芳烃的氧化偶联。这些反应不仅提供了一种新颖的碱金属盐催化的好氧氧化反应,而且提供了一种在制药和农药中普遍发现的硫代磷酸盐和亚硫基芳烃的有效方法。该反应在简单温和的反应条件下进行,可耐受各种官能团,适用于生物活性分子的后期合成和修饰。