Primary aminoboranes (RNHBR2), which are readily available by spontaneous dehydrocoupling of amines and boranes cleanly react at room temperature with aldehydes to give aldimines. The overall transformation from amines to aldimines can be conveniently performed by a sequential one‐pot reaction. This synthetic strategy is especially useful for electron poor and bulky amines which are reluctant to react
伯
氨基
硼烷(RNHBR 2)很容易通过胺和
硼烷的自发脱氢偶联在室温下与醛干净地反应生成醛
亚胺。从胺到醛
亚胺的整体转化可以通过顺序的一锅法反应方便地进行。这种合成策略特别适用于在脱
水条件下不愿与醛反应的贫电子胺和笨重胺。使用Glorius稳健性屏幕,我们证明了这种方法是
化学选择性的,并且对官能团具有耐受性。计算和实验数据支持与传统方法形成鲜明对比的醛
亚胺产物的不可逆形成。