Highly substituted 2-aminated indoles can be prepared in moderate to excellent yields by regioselective C2-amination of indoles promoted by iodine. As a key step in a concise synthesis of (+/-)-folicanthine, its core structure was easily obtained by one step cyclization-dimerization of substituted tryptophan in high yield on a gram scale.
通过
碘促进的
吲哚的区域选择性C 2-胺化,可以以中等至优异的产率制备高度取代的2-胺化的
吲哚。作为简明合成(+/-)-叶
黄嘌呤的关键步骤,通过以克为单位的高收率一步法将取代的色
氨酸进行环化-二聚,可以轻松获得其核心结构。