Rapid abnormal [3+2]-cycloaddition of isatin <i>N</i>,<i>N</i>′-cyclic azomethine imine 1,3-dipoles with chalcones
作者:Guizhou Yue、Zhengjie Dou、Zexi Zhou、Li Zhang、Juhua Feng、Huabao Chen、Zhongqiong Yin、Xu Song、Xiaoxia Liang、Xianxiang Wang、Hanbing Rao、Cuifen Lu
DOI:10.1039/d0nj00887g
日期:——
The rapid synthesis of novel dicyclic spiropyrrolidine was reported, using [3+2]-cycloaddition of isatin N,N′-cyclic azomethine imine 1,3-dipoles, generated from the condensation of substituted isatins and pyrazolidones, with chalcones in 2–5 min. The dicyclic spiropyrrolidine oxoindole was smoothly acquired in moderate to excellent yields (35–95%) with high diastereoselectivities (>20 : 1 dr).
快速报道了新型二环螺吡咯烷的合成,该反应使用取代的靛红和吡唑烷酮与缩醛的缩合反应,在2–5中使用[3 + 2]-靛红N环加成,N'-环偶氮甲亚胺亚胺1,3-偶极。分钟 双环螺吡咯烷氧杂吲哚以中等至优异的收率(35%至95%)平稳地获得,具有非对映选择性高(> 20:1 dr)。