Herein we disclose the synthesis of original chiral scaffolds—ortho‐orientated terphenyls presenting two atropisomeric Ar–Ar axes. These unusual structures were built up by using the C−H activation approach, and remarkably, both chiral axes were controlled with excellent stereoselectivity in a single transformation. During the reaction, not only does atroposelective functionalization of a biaryl precursor occur to establish one stereogenic axis, but an unprecedented atropo‐stereoselective C−H arylation also takes place to generate the second stereogenic element. These enantiomerically pure ortho‐terphenyls show an original tridimensional structure and thus constitute a unique foundation for building up a library of enantiomerically pure bidentate ligands, such as the new ligands S/N‐Biax and diphosphine BiaxPhos.

中文翻译：

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在一个CH活化步骤中发生两个立体诱导事件：通往带有两个阻转异构体轴的三联苯配体的途径

在这里，我们公开了原始手性支架的合成-呈现两个阻转异构Ar-Ar轴的邻位三联苯。这些不寻常的结构是通过使用CH活化方法建立的，并且值得注意的是，两个手性轴在一次转化中都具有出色的立体选择性。在反应过程中，不仅会发生联芳基前体的对映选择性官能化以建立一个立体轴，而且还会发生空前的对映立体选择性CH芳基化反应，从而生成第二个立体成因元素。这些对映体纯的邻位叔苯基具有原始的三维结构，因此为建立对映体纯的双齿配体（例如新的配体S / N-Biax和二膦酸BiaxPhos）库提供了独特的基础。