Copper-Promoted Oxidative Intramolecular C-H Amination of Hydrazones to Synthesize 1<i>H</i>
-Indazoles and 1<i>H</i>
-Pyrazoles Using a Cleavable Directing Group
作者:Guofu Zhang、Qiankun Fan、Yiyong Zhao、Chengrong Ding
DOI:10.1002/ejoc.201900947
日期:2019.9.8
A facile and efficient copper‐promoted oxidative intramolecular C–H amination of hydrazones for the synthesis of 1H‐indazoles and 1H‐pyrazoles was developed using a tracelessly cleavable directing group. This reaction is characterized by its mild conditions, operational simplicity, readily available reagents, and excellent yields. A tentative mechanism for Cu‐mediated C–H‐oxidative amination was proposed
使用无痕可裂解的导向基团,开发了一种容易且高效的铜促进的azo原子的氧化型分子内CH 3 H胺化反应,用于合成1 H-吲唑和1 H-吡唑。该反应的特征在于其温和的条件,操作简便,易于获得的试剂和优异的收率。提出了一种Cu介导的CHH氧化胺化的初步机制。