Synergistic Catalysis between a Dipeptide Phosphonium Salt and a Metal‐Based Lewis Acid for Asymmetric Synthesis of
<i>N</i>
‐Bridged [3.2.1] Ring Systems
作者:Yuan Chen、Jiajia He、Cheng Zhuang、Zanjiao Liu、Kai Xiao、Zhishan Su、Xiaoyu Ren、Tianli Wang
DOI:10.1002/anie.202207334
日期:2022.9.19
method for asymmetric construction of N-bridged [3.2.1] rings by a phosphonium salt/silver co-catalyzed cyclization has been developed. This route affords fluorine-installed tropane derivatives in excellent stereoselectivities. The mechanistic results revealed that the silver nitrite was installed on the phosphonium salt via hydrogen bonding and simultaneously activated the dipole, in a “sandwich” reaction
已经开发了一种通过鏻盐/银共催化环化不对称构建N桥 [3.2.1] 环的协同催化方法。该路线以优异的立体选择性提供了氟安装的托烷衍生物。机理结果表明,在“三明治”反应模型中,亚硝酸银通过氢键安装在鏻盐上,同时激活偶极子。