Cobalt–Nitrenoid Insertion-Mediated Amidative Carbon Rearrangement via Alkyl-Walking on Arenes
作者:Jeonghyo Lee、Bora Kang、Dongwook Kim、Jia Lee、Sukbok Chang
DOI:10.1021/jacs.1c10138
日期:2021.11.10
disclose the Cp*Co(III)(LX)-catalyzed amidative alkyl migration using 2,6-disubstituted phenyl azidoformates. Upon the cobalt–nitrenoid insertion toward the substituted ortho carbon, an arenium cationic species bearing a quaternary carbon is generated, and a subsequent alkyl migration process is suggested to occur through an unforeseen alkyl-walking mechanism. A quinolinol ligand of the cobalt catalyst system
我们在此公开了使用 2,6-二取代苯基叠氮甲酸酯的 Cp*Co(III)(LX) 催化的酰胺化烷基迁移。在钴-硝基氮向取代的邻位碳插入后,会产生带有季碳的芳鎓阳离子物质,随后的烷基迁移过程被认为是通过不可预见的烷基行走机制发生的。提出了钴催化剂体系的喹啉醇配体,通过作为内部碱促进最终产物释放的重芳构化过程。这种新的机制模式使[1,2]-和[1,4]-烷基重排成为可能,从而允许N-杂环化合物的结构变化。