期刊
SCIENCE CHINA-CHEMISTRY
卷 63, 期 8, 页码 1091-1099出版社
SCIENCE PRESS
DOI: 10.1007/s11426-020-9754-7
关键词
bifunctional phosphonium salts; benzofused tropanes; cyclic azomethine ylides; cyclodearomatization; antitumor activity
资金
- National Natural Science Foundation of China [21971165, 21921002, 81630101]
- National Key Research and Development Program of China [2018YFA0903500]
- 1000-Youth Talents Program [YJ201702]
- Fundamental Research Funds for the Central Universities
Structurally fused heterocycles encompassing a centerpiece of benzotropane are significant scaffolds with a plethora of promising biological activities, but such molecular architectures pose a long-standing daunting synthetic challenge. Herein, we reported a highly efficient asymmetric cyclodearomatization of 2-nitrobenzofurans with cyclic azomethine ylides by employing bifunctional phosphonium salts as phase-transfer catalysts. Under optimized reaction conditions, a diverse array of polycyclic benzofused tropane derivatives with four contiguous 4 degrees/3 degrees stereocenters were readily synthesized in both high yields and diastereoselectivities with up to >99% ee. The practicality and utility of this protocol were further demonstrated by the scaled-up reaction and facile elaborations. Moreover, preliminary investigations into their antitumor activities were also presented.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据