Iron-Catalyzed 1,4-Phenyl Migration/Ring Expansion of α-Azido <i>N</i>-Phenyl Amides
作者:Kaijie Wei、Siyu Liang、Tonghao Yang、Wei Yu
DOI:10.1021/acs.orglett.1c03509
日期:2021.11.5
novel iron-catalyzed skeleton rearrangement of alkyl azides. Upon treatment with FeCl2 and N-heterocyclic carbene SIPr·HCl in the presence of H2O and Et3N, 2-azido-N,N-diphenylamides underwent 1,4-phenyl migration and ring expansion to give azepin-2-ones in good yield. The reaction proceeds via intramolecular nitrene cycloaddition followed by C–N cleavage, water addition, and electrocyclic ring opening
在此,我们报告了一种新型铁催化的烷基叠氮化物骨架重排。在H 2 O 和 Et 3 N存在下,用 FeCl 2和 N-杂环卡宾 SIPr·HCl 处理后,2-叠氮基-N , N-二苯基酰胺发生 1,4-苯基迁移和扩环得到 azepin-2-产量良好的。该反应通过分子内氮烯环加成反应进行,然后是 C-N 裂解、加水和电环开环。