期刊
GREEN CHEMISTRY
卷 24, 期 9, 页码 3697-3703出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2gc00684g
关键词
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资金
- Natural Science Foundation of Zhejiang Province [LY22B020001, LY20B020006]
- National Natural Science Foundation of China [21702188]
- ERC
- DFG
In this study, a new method for the preparation of the key structure of natural allocolchicine through electrooxidative radical cyclization has been reported, providing an important and economical approach for the synthesis of related molecules. Additionally, a high-efficiency method for the removal of the sulfonyl group in the products using photocatalysis has been discovered.
Natural allocolchicine and analogues derived thereof a tricyclic 6-7-6-system have been found as key scaffold of various biologically relevant molecules. However, the direct preparation of the allocolchicine motif remains difficult to date. Herein, we report on an electrooxidative radical cyclization of biarylynones with various carbon- and heteroatom-centered radical precursors via a sequential radical addition/7-endo-trig/radical cyclization domino reaction. This approach provides a step-economical and strategically novel disconnection for the facile assembly of a wide range of carbocyclic 6-7-6 fused ring systems. Remarkably, the sulfonyl group on the products could be easily removed by photocatalysis at room temperature with high yields.
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