Electrochemical Total Synthesis of Pyrrolophenanthridone Alkaloids: Controlling the Anodically Initiated Electron Transfer Process
作者:Kazuhiro Okamoto、Kazuhiro Chiba
DOI:10.1021/acs.orglett.0c01082
日期:2020.5.1
and dehydrogenative indole synthesis were developed. Both reactions were initiated by anodic oxidation of the same electron-rich indoline moiety, but the product selectivity was controlled by different electron-transfer processes. Intramolecular cross-coupling was achieved by the generation of a strong electrophilic radical cation intermediate in the MeNO2-HFIP-LiClO4 system. Indole formation was accomplished
电化学分子内C(sp2)-H交叉偶联和脱氢吲哚合成的发展。两个反应均通过相同的富电子二氢吲哚部分的阳极氧化来引发,但产物的选择性受不同的电子转移过程控制。分子内交叉偶联是通过在MeNO2-HFIP-LiClO4系统中生成强亲电自由基阳离子中间体实现的。吲哚的形成是通过苄基氧化和连续去质子化完成的。我们将这些反应应用于天然吡咯并菲蒽酮生物碱的全合成。