desymmetrization strategy reported herein. The electrophilic aromatic substitution reaction of 3,5-disubsituted phenols with diazodicarboxamides could afford these axially chiral structures in good efficiency with excellent enantiocontrol. The efficient long-range stereochemical control is achieved by multiple well-defined H-bonding interactions between chiral phosphoric acid and both substrates. Meanwhile, the
通过本文报道的手性
磷酸催化去对称化策略,实现了先前难以捉摸的具有 C-B 立体轴的轴向手性 B-芳基-1,2-氮杂
硼烷的催化对映选择性构建。3,5-二取代
苯酚与重氮二甲酰胺的亲电芳香取代反应可以有效地提供这些轴向手性结构,并具有优异的对映控制。有效的远程立体
化学控制是通过手性
磷酸和两种底物之间的多个明确定义的 H 键相互作用实现的。同时,1,2-氮杂
硼碱中弱酸性的N-H作为H键供体可以显着缩短反应时间。反应的可扩展性和产物中 N-N 键的易裂解进一步证明了该方法的实用性。