asymmetric 1,3-dipolar cycloaddition reaction of cyclic azomethine ylides with N-substituted maleimides has been developed for the efficient construction of azabicyclo[2.2.1]heptanes, a valuable structural motif for drug discovery, in good yields with high diastereoselectivities (up to 16:1 dr) and excellent enantioselectivities (up to 97% ee). The key feature of the present methodology is that two quaternary
Ag(I)/TF-BiphamPhos 催化的环状偶氮甲碱叶立德与 N 取代马来
酰亚胺的不对称 1,3-偶极环加成反应已被开发用于有效构建
氮杂双环 [2.2.1]
庚烷,这是一种有价值的药物发现结构基序,具有高非对映选择性(高达 16:1 dr)和出色的对映选择性(高达 97% ee)的良好收率。本方法的关键特征是在环化过程中生成的四个连续立体中心之间有效地构建了两个四元立体中心。