Carbene‐Catalyzed Activation of Remote Nitrogen Atoms of (Benz)imidazole‐Derived Aldimines for Enantioselective Synthesis of Heterocycles
作者:Xing Yang、Yongtao Xie、Jun Xu、Shichao Ren、Bivas Mondal、Liejin Zhou、Weiyi Tian、Xinglong Zhang、Lin Hao、Zhichao Jin、Yonggui Robin Chi
DOI:10.1002/anie.202016506
日期:2021.3.29
A new mode of carbene‐catalyzed heteroatom activation and asymmetric reactions is disclosed. The reaction starts with addition of a carbene catalyst to a (benz)imidazole‐derived aldimine substrate. Subsequent oxidation and proton transfer lead to the formation of a catalyst‐bound triaza‐diene as the key intermediate, in which the nitrogen atom at a site remote to the catalyst‐substrate bond is activated