Copper‐Catalyzed Intermolecular Enantioselective Radical Oxidative C(sp
<sup>3</sup>
)−H/C(sp)−H Cross‐Coupling with Rationally Designed Oxazoline‐Derived N,N,P(O)‐Ligands
作者:Lin Liu、Kai‐Xin Guo、Yu Tian、Chang‐Jiang Yang、Qiang‐Shuai Gu、Zhong‐Liang Li、Liu Ye、Xin‐Yuan Liu
DOI:10.1002/anie.202110233
日期:2021.12.13
C(sp3 )-C(sp) cross-coupling of (hetero)benzylic and (cyclic)allylic C-H bonds with terminal alkynes that occurs with high to excellent enantioselectivity. Critical to the success is the rational design of chiral oxazoline-derived N,N,P(O)-ligands that not only tolerate the strong oxidative conditions which are requisite for intermolecular hydrogen atom abstraction (HAA) processes but also induce the
C(sp3 )-H 键与容易获得的末端炔烃的分子间不对称自由基氧化 C(sp3 )-C(sp) 交叉偶联是一种很有前景的方法来形成手性 C(sp3 )-C(sp) 键,因为高原子和阶梯经济,但仍未得到充分探索。在这里,我们报告了铜催化的(杂)苄基和(环)烯丙基 CH 键与末端炔烃的不对称 C(sp3 )-C(sp) 交叉偶联,该键具有高到优异的对映选择性。成功的关键是手性恶唑啉衍生的 N,N,P(O)-配体的合理设计,它不仅能耐受分子间氢原子提取 (HAA) 过程所需的强氧化条件,而且还能诱导具有挑战性的对映控制。直接获得一系列合成有用的手性苄基炔烃和 1,4-烯炔,