Asymmetric Total Synthesis of Hasubanan Alkaloids: Periglaucines A-C, N,O-Dimethyloxostephine and Oxostephabenine.

Shaolei Ding,Yingbo Shi,Baochao Yang,Min Hou,Haibing He,Shuanhu Gao

Angewandte Chemie (International ed. in English)（2023）

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摘要

We report herein the asymmetric total synthesis of periglaucines A-C, N,O-dimethyloxostephine and oxostephabenine. The key strategies used include: 1) a Rh -catalyzed regio- and diastereoselective Hayashi-Miyaura reaction to connect two necessary fragments; 2) an intramolecular photoenolization/Diels-Alder (PEDA) reaction to construct the highly functionalized tricyclic core skeleton bearing a quaternary center; 3) a bio-inspired intramolecular Michael addition and transannular acetalization to generate the aza[4.4.3]propellane and the tetrahydrofuran ring.

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关键词

Hasubanan Alkaloids,Natural Products,Photoenolization/Diels-Alder Reaction,Quaternary Centers,Total Synthesis

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