Synthesis of chiral α-amino anilides via a DMEDA-promoted selective C─N coupling reaction of aryl halides and α-aminoamides
作者:Xiangting Min、Xiaoyu Li、Yu Wang、Yawen Dong、Jingjing Tang、Jing Wang、Jianhui Liu
DOI:10.1016/j.tet.2018.03.003
日期:2018.5
A DMEDA-promoted and copper-catalyzed approach has been designed for the coupling of aryl halides and chiral α-aminoamides to afford a range of functionalized chiral α-amino anilides. This method has a higher yield and better reproducibility than those under ligand-free conditions. Of the two amino groups in the same molecule, only the amide NH2 is observed to react, showing high regioselectivity.
已经设计了一种DMEDA促进的铜催化方法,用于芳基卤化物和手性α-氨基酰胺的偶联,以提供一系列官能化的手性α-氨基苯胺。与在无配体条件下相比,该方法具有更高的收率和更好的重现性。在同一分子中的两个氨基中,仅酰胺NH 2被观察到反应,显示出高区域选择性。此外,不会发生消旋化,并且ee可以达到99%。对于某些含羟基的底物,例如1-酪氨酸酰胺和1-苏氨酸酰胺,需要添加相转移催化剂(15-Crown-5)来进行这种转化。