期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 28, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202201684
关键词
Anti-SARS-CoV-2 Agents; Domino Reactions; Natural Products; Semisynthesis; Wolff Rearrangement
资金
- NSFC-Joint Foundation of Yunnan Province [U2002221]
- Second Tibetan Plateau Scientific Expedition and Research (STEP) program [2019QZKK0502]
- National Natural Science Foundation of China [81673329, 81874298, 22122104, 21933004, 82151214]
- CAS Light of West China Program, CAS Interdisciplinary Innovation Team
- Yunnan Science Fund for Distinguished Young Scholars [2019FJ002]
- China Postdoctoral Science Foundation [2021M693237]
- Yunnan Key Research and Development Program [202103AC100005]
A pharmacophore-oriented semisynthesis approach was used to discover anti-SARS-CoV-2 agents by modifying (-)-maoelactone A and oridonin. The WRLC reaction was developed to construct the maoelactone-type scaffold, and further mechanistic study revealed the mechanisms of Wolff rearrangement and lactonization. The creation of a novel family by combining the maoelactone-type scaffold and the pharmacophore of oridonin resulted in a derivative with potent anti-SARS-CoV-2 activity.
Natural products possessing unique scaffolds may have antiviral activity but their complex structures hinder facile synthesis. A pharmacophore-oriented semisynthesis approach was applied to (-)-maoelactone A (1) and oridonin (2) for the discovery of anti-SARS-CoV-2 agents. The Wolff rearrangement/lactonization cascade (WRLC) reaction was developed to construct the unprecedented maoelactone-type scaffold during semisynthesis of 1. Further mechanistic study suggested a concerted mechanism for Wolff rearrangement and a water-assisted stepwise process for lactonization. The WRLC reaction then enabled the creation of a novel family by assembly of the maoelactone-type scaffold and the pharmacophore of 2, whereby one derivative inhibited SARS-CoV-2 replication in HPA EpiC cells with a low EC50 value (19 +/- 1 nM) and a high TI value (>1000), both values better than those of remdesivir.
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