Formal Aza‐Wacker Cyclization by Tandem Electrochemical Oxidation and Copper Catalysis
作者:Xiangli Yi、Xile Hu
DOI:10.1002/anie.201814509
日期:2019.3.26
In oxidative electrochemical organic synthesis, radical intermediates are often oxidized to cations on the way to final product formation. Herein, we describe an approach to transform electrochemically generated organic radical intermediates into neutral products by reaction with a metal catalyst. This approach combines electrochemical oxidation with Cu catalysis to effect formal aza‐Wacker cyclization
在氧化电化学有机合成中,自由基中间体通常在最终产物形成的途中被氧化成阳离子。在本文中,我们描述了一种通过与金属催化剂反应将电化学生成的有机自由基中间体转变成中性产物的方法。该方法将电化学氧化与Cu催化结合起来,实现内部烯烃的正式aza-Wacker环化。Cu催化剂对于将仲和伯烷基自由基中间体转化为烯烃是必不可少的。可以在温和条件下制备包括恶唑烷酮,咪唑啉酮,噻唑烷酮,吡咯烷酮和异吲哚啉酮在内的五元N杂环。