Cu(II)‐Mediated C−C/C−O Bond Formation via C−H/C−C Bond Cleavage: Access to Benzofurans Using Amide as a Traceless Directing Group
作者:Shuling Yu、Ningning Lv、Zhanxiang Liu、Yuhong Zhang
DOI:10.1002/adsc.201901316
日期:2020.1.7
A copper‐mediated synthesis of 2,3‐disubstituted benzofurans with the assistance of an 8‐aminoquinolyl auxiliary is described from readily available benzamides and benzoylacetonitriles. In this reaction, the C−C bond is successfully constructed via C−H activation, and C−O bond is subsequently formed at the original position of the amide group in a one‐pot manner. The amide directing group is detached
描述了一种由铜酰胺和苯甲酰基乙腈在8-氨基喹啉基助剂的辅助下通过铜介导的2,3-二取代苯并呋喃的合成方法。在该反应中,通过C-H活化成功地建立了C-C键,随后以单锅方式在酰胺基团的原始位置形成了C-O键。在反应条件下,通过C-C键断裂,酰胺导向基团同时脱离。令人惊讶地,可以通过使用氨作为胺源来改变反应条件来获得独特的异喹啉酮产物。