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ARTICLE

Communesin生物碱核心五环骨架的高效合成

杨之同a, 宋恒谦a, 雷盼a, 闫嘉航a,*, 谢卫青a,b,*   

  1. a西北农林科技大学 化学与药学院 陕西杨凌 712100;
    b陕西省植物源农药研究与开发重点实验室 陕西杨凌 712100
  • 收稿日期:2024-08-06 修回日期:2024-09-09
  • 基金资助:
    国家自然科学基金(No. 22301245 , 22371231 )资助项目.

Efficient Construction of the Core Pentacyclic Skeleton of Communesin Alkaloids

Zhitong Yanga, Hengqian Songa, Pan Leia, Jiahang Yana,*, Weiqing Xiea,b,*   

  1. aCollege of Chemistry & Pharmacy, Northwest A& F University, Yangling, Shaanxi 712100;
    bKey Laboratory of Botanical Pesticide R& D in Shaanxi Province, Yangling, Institution, Shaanxi 712100;
  • Received:2024-08-06 Revised:2024-09-09
  • Contact: * E-mail: xiewq@nwafu.edu.cn
  • Supported by:
    National Natural Science Foundation of China (No. 22301245 , 22371231 )

Communesin alkaloids are a family of complex dimeric cyclotryptamine alkaloids isolated from the marine fungi of the genus Penicillium. These indole alkaloids contain a unique caged heptacyclic skeleton along with five stereogenic centers at least, two of which are the contiguous quaternary carbon centers (CQCCs), thus presenting remarkable synthetic challenges. Herein, we develop an expedient construction the core pentacyclic ring system of communesins. The key steps include a catalytic asymmetric conjugated addition promoted by Ni(II)/chiral N,O-chiral dioxide for establishing the CQCCs and a deprotection/ring-opening reaction/cyclization cascade for setting up the pentacyclic skeleton.

Key words: communesin, contiguous quaternary carbon, asymmetric catalysis, conjugated addition, cascade cyclization