a tool for the transformation of electron-rich enamines to iminium ions. These iminium ions take part in a subsequent Michael-initiated ring-closure (MIRC) reaction with in situ present nucleophile giving rise to overall cyclopropanation reaction of saturated aldehydes. Stereodefined cyclopropanes are obtained in high yields and selectivities. This one-pot transformation represents the additional example
在此,我们证明了在二芳基脯
氨醇甲
硅烷基醚型催化剂存在下的有机单电子氧化剂可作为将富电子烯胺转化为
亚胺离子的工具。这些
亚胺离子参与随后的迈克尔引发的闭环 (MIRC) 反应与原位存在的亲核试剂,从而引起饱和醛的整体
环丙烷化反应。以高产率和选择性获得立体定义的
环丙烷。这种一锅法转化代表了在耦合一锅法中使用的饱和醛的另一个例子。