Cu-Catalyzed Asymmetric 1,3-Dipolar Cycloaddition of <i>N</i>-2,2,2-Trifluoroethylisatin Ketimines Enables the Desymmetrization of <i>N</i>-Arylmaleimides: Access to Enantioenriched F<sub>3</sub>C-Containing Octahydropyrrolo[3,4-<i>c</i>]pyrroles
作者:Zhen-Hua Wang、Ji-Hong Liu、Yan-Ping Zhang、Jian-Qiang Zhao、Yong You、Ming-Qiang Zhou、Wen-Yong Han、Wei-Cheng Yuan
DOI:10.1021/acs.orglett.2c01510
日期:2022.6.10
With a Cu(OTf)2/chiral ferrocenyl P,N-ligand complex as a catalyst, the enantioselective desymmetrization of N-arylmaleimides was successfully realized by taking advantage of the asymmetric 1,3-dipolar cycloaddition reaction of N-2,2,2-trifluoroethylisatin ketimines. A series of structurally diverse F3C-containing octahydropyrrolo[3,4-c]pyrroles, bearing four contiguous carbon stereocenters and one
以Cu(OTf) 2 /手性二茂铁P,N-配体配合物为催化剂,利用N -2,2的不对称1,3-偶极环加成反应,成功实现了N-芳基马来酰亚胺的对映选择性去对称化, 2-三氟乙基靛红酮亚胺。以优异的结果获得了一系列结构多样的含 F 3 C 八氢吡咯并[3,4- c ]吡咯,具有四个连续的碳立构中心和一个立体手性 C-N 轴向键(产率≤99%,>20:1博士和 99% ee)。