Synthesis of Axially Chiral Biaryl‐2‐amines by Pd
<sup>II</sup>
‐Catalyzed Free‐Amine‐Directed Atroposelective C−H Olefination
作者:Bei‐Bei Zhan、Lei Wang、Jun Luo、Xu‐Feng Lin、Bing‐Feng Shi
DOI:10.1002/anie.201915674
日期:2020.2.24
A simple and ubiquitously present group, free amine, is used as a directing group to synthesize axially chiral biaryl compounds by PdII -catalyzed atroposelective C-H olefination. A broad range of axially chiral biaryl-2-amines can be obtained in good yields with high enantioselectivities (up to 97 % ee). Chiral spiro phosphoricacid (SPA) proved to be an efficient ligand and the loading could be reduced