Blue-light-mediated cyclopropanation of indoles with aryl(diazo)acetates has been developed. The salient features of this strategy are that it is metal-free, operationally simple and atom-efficient, and that it uses an environmentally friendly energy source. In this protocol, blue light was employed as the sole energy source for the transformation. A variety of cyclopropane-fused indoline compounds was obtained in moderate to excellent yields and high diastereoselectivities under mild conditions.
通过芳基(重氮)
乙酸酯的蓝光介导下,已经开发出
吲哚的
环丙烷化反应。该策略的显著特点是无
金属,操作简单,原子效率高,并且使用环境友好的能源。在该方案中,蓝光被用作转化的唯一能源。在温和条件下,得到了多种
环丙烷融合
吲哚化合物,并获得了中等到优异的收率和高的对映选择性。