Catalytic asymmetric aromatizing inverse electron-demand [4+2] cycloaddition of 1-thioaurones and 1-azaaurones
作者:Shu-Pei Yuan、Pei-Hao Dou、Yun-Qing Jia、Jian-Qiang Zhao、Yong You、Zhen-Hua Wang、Ming-Qiang Zhou、Wei-Cheng Yuan
DOI:10.1039/d1cc06357j
日期:——
Using 1-thioaurones and 1-azaaurones as electron-deficient oxa-dienes, an organocatalytic asymmetric aromatizing inverse electron-demand [4+2] cycloaddition with γ-deconjugated butenolides and azlactones was developed. A wide range of optically active benzothiophene-fused δ-lactones and indole-fused δ-lactones were obtained with desirable outcomes (up to 94% yield, >99 : 1 dr and 99% ee).
以1-硫代金酮和1-氮杂金酮作为缺电子氧杂二烯,开发了γ-去共轭丁烯内酯和吖内酯的有机催化不对称芳构化逆电子需求[4+2]环加成反应。以理想的结果获得了范围广泛的光学活性苯并噻吩稠合 δ-内酯和吲哚稠合 δ-内酯(高达 94% 的产率,>99:1 dr 和 99% ee)。