We report a highly cross- and atroposelective coupling between ortho-(chloro)arylphosphine oxides and ortho-(bromo)aryl ethers. This previously unknown asymmetric nickel-catalyzed reaction offers a direct route to highly enantioenriched axially chiral biaryl monophosphine oxides that are difficult to access by other means. These products can be readily reduced to generate chiral MOP-type ligands bearing
我们报道了邻(
氯)芳基氧化膦和邻(
溴)芳基醚之间的高度交叉和间质选择性偶联。这种以前未知的不对称
镍催化反应为高度对映体富集的轴向手性联芳基单膦氧化物提供了直接途径,而这是通过其他方法难以获得的。这些产物可以很容易地还原生成带有复杂骨架的手性 MOP 型
配体。还证明了这些手性
配体在不对称催化中的效用。