Reaction of Donor-Acceptor Cyclobutanes with Indoles: A General Protocol for the Formal Total Synthesis of (±)-Strychnine and the Total Synthesis of (±)-Akuammicine

被引:102
|
作者
Feng, Liang-Wen [1 ]
Ren, Hai [1 ]
Xiong, Hu [1 ]
Wang, Pan [1 ]
Wang, Lijia [1 ]
Tang, Yong [1 ,2 ]
机构
[1] Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organometall Chem, 345 Lingling Lu, Shanghai 200032, Peoples R China
[2] Collaborat Innovat Ctr Chem Sci & Engn, Tianjin, Peoples R China
基金
中国国家自然科学基金;
关键词
annulations; cyclobutanes; diastereoselectivity; heterocycles; natural products; ASYMMETRIC TOTAL-SYNTHESIS; 1ST TOTAL-SYNTHESIS; 4+2 CYCLOADDITION; ORGANIC-SYNTHESIS; NATURAL-PRODUCTS; SUBSTITUTED CYCLOPROPANE; STRATEGY; STRYCHNINE; (+/-)-ASPIDOSPERMIDINE; (+/-)-GONIOMITINE;
D O I
10.1002/anie.201611734
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A ligand-promoted catalytic [4+2] annulation reaction using indole derivatives and donor-acceptor (D-A) cyclobutanes is reported, thus providing an efficient and atom-economical access to versatile cyclohexa-fused indolines with excellent levels of diastereoselectivity and a broad substrate scope. In the presence of a chiral SaBOX ligand, excellent enantioselectivity was realized with up to 94% ee. This novel synthetic method is applied as a general protocol for the total synthesis of (+/-)-akuammicine and the formal total synthesis of (+/-)-strychnine from the same common-core scaffold.
引用
收藏
页码:3055 / 3058
页数:4
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