Electrochemically Enabled Intramolecular Aminooxygenation of Alkynes
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Amidyl Radical Cyclization
作者:Zhong‐Wei Hou、Hai‐Chao Xu
DOI:10.1002/cjoc.201900500
日期:2020.4
An electrochemical synthesis of oxazol‐2‐ones and imidazol‐2‐ones has been developed via 5‐exo‐dig cyclization of propargylic carbamates‐ and ureas‐derived amidyl radicals. The electrosynthesis relies on the dual function of 2,2,6,6‐tetramethylpiperidin‐ 1‐yl)oxyl (TEMPO) as a redox mediator for amidyl radical formation and an oxygen atom donor. The reactions are conducted under mild conditions using