Substituted racemic lactols or cyclic hemiaminals were directly used as nucleophiles in enamine-based asymmetric amination reactions to access enantioenriched α-amino lactones or lactams via a one-pot sequence. The desired products, which are very important building blocks in organic synthesis but difficult to be prepared in the optically enriched form, could be afforded with two stereogenic centers
在基于烯胺的不对称胺化反应中,取代的外消旋内酯或环状
半缩醛直接用作亲核试剂,以通过途径获得对映体富集的α-
氨基内酯或内酰胺。一锅序列。所需的产物是有机合成中非常重要的组成部分,但很难以光学富集的形式制备,可以用两个立体异构中心以高收率和优异的对映选择性提供它们。而且,从外消旋的前体开始并由催化剂的对映异构体对催化,仅在简单的柱色谱法之后才离散地提供所有可能的立体异构体产物。另外,该方案提供了对几种新颖的双环
氨基甲酸酯的容易获得的途径,并且此类药物样
杂环化合物可能在药物
化学中可能有用。