Enantioselective Synthesis of<i>cis</i>-4-Formyl-β-lactams<i>via</i>Chiral N-Heterocyclic Carbene-Catalyzed Kinetic Resolution
作者:Gong-Qiang Li、Yi Li、Li-Xin Dai、Shu-Li You
DOI:10.1002/adsc.200800071
日期:2008.6.9
An efficient synthesis of optically pure cis-4-formyl-β-lactams (up to 99% ee) by a chiral NHC-catalyzed ring expansion reaction has been realized, featuring the ready availability of both the substrate and the catalyst, and the mild reaction conditions. The current method is also suitable for the synthesis of enantioenriched 4-formyl-β-lactams and succinimides containing quaternary carbon centers
通过手性NHC催化的扩环反应,可以高效合成光学纯的顺式-4-甲酰基-β-内酰胺(最高ee达99%),具有容易获得的底物和催化剂,并且温和的特点反应条件。当前的方法也适用于合成富含对映体的4-甲酰基-β-内酰胺和含有季碳中心的琥珀酰亚胺。