Asymmetric synthesis of highly functionalized γ-lactams through an organocatalytic aza-Michael–Michael reaction cascade using fumaric acid amide esters as multi-reactive substrates
作者:Takuya Yokosaka、Akinari Hamajima、Tetsuhiro Nemoto、Yasumasa Hamada
DOI:10.1016/j.tetlet.2011.12.114
日期:2012.3
We developed a novel method for the asymmetric synthesis of highly functionalized γ-lactams through an organocatalytic aza-Michael–Michael reaction cascade using fumaric acid amide esters as multi-reactive substrates. Using chiral primary or secondary amine organocatalysts, we obtained two types of γ-lactams with three contiguous chiral centers in moderate to good yield with excellent enantioselectivity
我们开发了一种新方法,该方法通过使用富马酸酰胺酯作为多反应性底物,通过有机催化的aza-Michael-Michael反应级联反应不对称合成高度官能化的γ-内酰胺。使用手性伯胺或仲胺有机催化剂,我们以中等至良好的收率获得了具有三个连续手性中心的两种类型的γ-内酰胺,具有出色的对映选择性和非对映选择性。