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Sun YJ, Zhao C, Wang HJ, Li M, Chen H, Feng WS. Five new biflavonoids with acetylcholinesterase inhibitory activity from Diphylleia sinensis. Fitoterapia 2024; 172:105721. [PMID: 37931718 DOI: 10.1016/j.fitote.2023.105721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/26/2023] [Accepted: 11/01/2023] [Indexed: 11/08/2023]
Abstract
Five new biflavonoids, diphybiflavonoids A - E (1-5), were isolated from the roots and rhizomes of Diphylleia sinensis. Their structures were elucidated by extensive spectroscopic data, including UV, IR, HR-ESI-MS and 2D NMR. Their absolute configurations were determined by ECD spectra. All isolated compounds were evaluated for acetylcholinesterase (AChE) inhibitory activity. Compounds 1-4 exhibited the potent AChE inhibitory activities with IC50 values of 1.62, 2.10, 2.08, and 5.15 μM, respectively. The preliminary structure-activity relationship study indicated that the connection mode (C2-O-C4'''/C3-O-C3''' or C2-O-C3'''/C3-O-C4''') of biflavonoid subunits, and 3-hydroxy group of flavonol subunit were important structural factors for AChE inhibitory activity. Biflavonoids, containing a C2-O-C4'''/C3-O-C3''' or C2-O-C3'''/C3-O-C4''' linkage, can be a potentially useful platform for development of cholinesterase inhibitors.
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Affiliation(s)
- Yan-Jun Sun
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China.
| | - Chen Zhao
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, People's Republic of China
| | - Hao-Jie Wang
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, People's Republic of China
| | - Meng Li
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, People's Republic of China
| | - Hui Chen
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, People's Republic of China
| | - Wei-Sheng Feng
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou 450046, People's Republic of China.
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Xu JJ, Luo J, Xi H, Xu JB, Wan LX. Palladium-catalyzed synthesis and anti-AD biological activity evaluation of N-aryl-debenzeyldonepezil analogues. Front Chem 2023; 11:1282978. [PMID: 38144888 PMCID: PMC10748399 DOI: 10.3389/fchem.2023.1282978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 11/27/2023] [Indexed: 12/26/2023] Open
Abstract
A series of novel N-aryl-debenzeyldonepezil derivatives (1-26) were designed and synthesized as cholinesterase inhibitors by the modification of anti-Alzheimer's disease drug donepezil, using Palladium catalyzed Buchwald-Hartwig cross-coupling reaction as a key chemical synthesis strategy. In vitro cholinesterase inhibition studies demonstrated that the majority of synthesized compounds exhibited high selective inhibition of AChE. Among them, analogue 13 possessing a quinoline functional group showed the most potent AChE inhibition effect and significant neuroprotective effect against H2O2-induced injury in SH-SY5Y cells. Furthermore, Compound 13 did not show significant cytotoxicity on SH-SY5Y. These results suggest that 13 is a potential multifunctional active molecule for treating Alzheimer's disease.
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Affiliation(s)
- Jing-Jing Xu
- Department of Pharmacy, The Third People’s Hospital of Chengdu, Chengdu, China
| | - Jiao Luo
- Department of Pharmacy, The Third People’s Hospital of Chengdu, Chengdu, China
| | - Heng Xi
- Department of Pharmacy, The Third People’s Hospital of Chengdu, Chengdu, China
| | - Jin-Bu Xu
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, China
| | - Lin-Xi Wan
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, China
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Yin B, Li X, Li ZX, Zhu XX, Zhang L, Zhou XL, Xu JB, Chen FZ, Tang P, Gao F. Adenophorone, An Unprecedented Sesquiterpene from Eupatorium adenophorum: Structural Elucidation, Bioinspired Total Synthesis and Neuroprotective Activity Evaluation. Angew Chem Int Ed Engl 2023; 62:e202306326. [PMID: 37278098 DOI: 10.1002/anie.202306326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/02/2023] [Accepted: 06/05/2023] [Indexed: 06/07/2023]
Abstract
(-)-Adenophorone (1), a caged polycyclic sesquiterpene featuring an unprecedented tricyclo[4.3.1.05,9 ]decane skeleton, was isolated from Eupatorium adenopharum Spreng. The structure of 1 was unambiguously established by a combination of spectroscopic analysis, X-ray crystallography, and bioinspired total synthesis. Key synthetic features include a sequential Reformatsky/oxidation/regio- and stereoselective hydrogenation, and subsequent merged MBH-Tsuji-Trost cyclization. The concise synthetic sequence efficiently constructs the bicyclic skeleton of cadinene sesquiterpene (+)-euptox A (2) in 8 steps from commercially available monoterpene (-)-carvone (6), with outstanding performance on diastereocontrol. The bioinspired synthesis of 1 was achieved from 2, a plausible biogenetic precursor, via transannular Michael addition. This work provides experimental evidence of our proposed biosynthetic hypothesis of 1. Additionally, compound 1 showed potent neuroprotective activity in H2 O2 -treated SH-SY5Y and PC12 cells.
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Affiliation(s)
- Bo Yin
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Xiaohuan Li
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Zi-Xiang Li
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Xiao-Xin Zhu
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Lan Zhang
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Xian-Li Zhou
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Jin-Bu Xu
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Feng-Zheng Chen
- College of Chemistry, Leshan Normal University, Leshan, 614004, P. R. China
| | - Pei Tang
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, P. R. China
| | - Feng Gao
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
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