Synthesis of Chiral Trispirocyclic Oxindoles via Organic-Base/Au(I)-Catalyzed Sequential Reactions
Synthesis of Chiral Trispirocyclic Oxindoles via Organic-Base/Au(I)-Catalyzed Sequential Reactions
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有机碱/Au(I)催化序贯反应合成手性三螺环吲哚
DOI:
10.1021/acscatal.8b02157
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发表时间:
2018-09
期刊:
影响因子:
12.9
通讯作者:
Can Li
中科院分区:
文献类型:
--
作者:
Wengang Guo;Lu Li;Qian Ding;Xiangfeng Lin;Xianghui Liu;Kai Wang;Yan Liu;Hongjun Fan;Can Li
Chiral spirooxindole is the core structure of a large number of natural and unnatural products with biological activities. However, the construction of trispirocyclic oxindoles remains challenging because of the difficulty in the assembly, the complex skeleton, and control of the stereoselectivities of the multiple quaternary stereocenters. Herein, we present the organic base/Au(I)-catalyzed sequential asymmetric 1,2-addition/cascade hydroamination/HDA/deisobutene reactions for the elaboration of various trispirocyclic N,O-ketal tethered oxindoles and bisoxindoles in excellent optical purities (91–99% ee). Key to the success of this methodology is Au(I)-catalyzed hetero-Diels–Alder reactions utilizing N-Boc-iminooxindoles as the heterodienes.
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