chiral biaryls represent a rarely explored class of atropisomeric compounds. We hereby report rhodium-catalyzed enantioselective [4 + 2] oxidative annulation of internal alkynes with benzamides bearing two classes of N–N directing groups. The coupling occurs under mild conditions via NH and CH annulation through the dynamic kinetic transformation of the directing group and is highly enantioselective
N-N 轴向手性联芳基代表了一类很少被探索的阻转异构化合物。我们在此报道了
铑催化的内部
炔烃与带有两类 N-N 导向基团的苯甲酰胺的对映选择性 [4 + 2] 氧化成环反应。偶联在温和条件下通过导向基团的动态动力学转化通过NH 和 CH 成环发生,并且具有高度对映选择性和良好的功能耐受性。在 DFT
水平上对偶联系统进行了计算研究,并且
炔烃插入被确定为对映体决定步骤以及周转限制步骤。