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Liu H, Laporte AG, Gónzalez Pinardo D, Fernández I, Hazelard D, Compain P. An Unexpected Lewis Acid-Catalyzed Cascade during the Synthesis of the DEF-Benzoxocin Ring System of Nogalamycin and Menogaril: Mechanistic Elucidation by Intermediate Trapping Experiments and Density Functional Theory Studies. J Org Chem 2024; 89:5634-5649. [PMID: 38554093 DOI: 10.1021/acs.joc.4c00134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/01/2024]
Abstract
An unexpected Lewis acid-catalyzed carbohydrate rearrangement of a 1,5-bis-glycopyranoside to the product of a formal intramolecular C-aryl glycosylation reaction is reported. Mechanistic studies based mainly on intermediate trapping experiments and density functional theory (DFT) calculations reveal a cascade process involving three transient (a)cyclic oxocarbenium cations, the breaking of three single C(sp3)-O bonds, and the formation of three single bonds (i.e., exo-, endo-, and C-glycosidic bonds), leading to the 2,6-epoxybenzoxocine skeleton of bioactive natural glycoconjugates related to serjanione A and mimocaesalpin E. DFT calculations established that the generation of the pyran moiety embedded in the bridged benzoxocin ring system is likely to proceed through an unusual ring-closure of an ortho-quinone methide intermediate in which the attacking nucleophile is a carbonyl oxygen.
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Affiliation(s)
- Haijuan Liu
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), Université de Strasbourg, Université de Haute-Alsace, CNRS (UMR 7042), Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67000 Strasbourg, France
| | - Adrien G Laporte
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), Université de Strasbourg, Université de Haute-Alsace, CNRS (UMR 7042), Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67000 Strasbourg, France
| | - Daniel Gónzalez Pinardo
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Israel Fernández
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Damien Hazelard
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), Université de Strasbourg, Université de Haute-Alsace, CNRS (UMR 7042), Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67000 Strasbourg, France
| | - Philippe Compain
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), Université de Strasbourg, Université de Haute-Alsace, CNRS (UMR 7042), Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67000 Strasbourg, France
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Liu CF. Recent Advances on Natural Aryl- C-glycoside Scaffolds: Structure, Bioactivities, and Synthesis-A Comprehensive Review. Molecules 2022; 27:7439. [PMID: 36364266 PMCID: PMC9654268 DOI: 10.3390/molecules27217439] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 10/28/2022] [Accepted: 10/31/2022] [Indexed: 09/23/2023] Open
Abstract
Aryl-C-glycosides, of both synthetic and natural origin, are of great significance in medicinal chemistry owing to their unique structures and stability towards enzymatic and chemical hydrolysis as compared to O-glycosides. They are well-known antibiotics and potent enzyme inhibitors and possess a wide range of biological activities such as anticancer, antioxidant, antiviral, hypoglycemic effects, and so on. Currently, a number of aryl-C-glycoside drugs are on sale for the treatment of diabetes and related complications. This review summarizes the findings on aryl-C-glycoside scaffolds over the past 20 years, concerning new structures (over 200 molecules), their bioactivities-including anticancer, anti-inflammatory, antioxidant, antivirus, glycation inhibitory activities and other pharmacological effects-as well as their synthesis.
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Affiliation(s)
- Chen-Fu Liu
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, China
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Li C, Dai T, Chen J, Chen M, Liang R, Liu C, Du L, McClements DJ. Modification of flavonoids: methods and influences on biological activities. Crit Rev Food Sci Nutr 2022; 63:10637-10658. [PMID: 35687361 DOI: 10.1080/10408398.2022.2083572] [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] [Indexed: 11/03/2022]
Abstract
Flavonoids are important active ingredients in plant-based food, which have many beneficial effects on health. But the low solubility, poor oral bioavailability, and inferior stability of many flavonoids may limit their applications in the food, cosmetics, and pharmaceutical industries. Structural modification can overcome these shortcomings to improve and extend the application of flavonoids. The study of how to modify flavonoids and the influence of various modifications on biological activity have drawn great interest in the current literature. In this review, the working principles and operating conditions of modification methods were summarized along with their potential and limitations in terms of operational safety, cost, and productivity. The influence of various modifications on biological activities and the structure-activity relationships of flavonoids derivatives were discussed and highlighted, which may give guidance for the synthesis of highly effective active agents. In addition, the safety of flavonoids derivatives is reviewed, and future research directions of flavonoid modification research are discussed.
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Affiliation(s)
- Changhong Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Taotao Dai
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- Guangxi Academy of Agricultural Sciences, Agro-food Science and Technology Research Institute, Nanning, China
| | - Jun Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Mingshun Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Ruihong Liang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Chengmei Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Liqing Du
- China Academy of Tropical Agricultural Sciences, South Subtropical Crop Research Institute, Zhanjiang China
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Dong H, Wu M, Li Y, Lu L, Qin J, He Y, Shi Z. Total Syntheses and Anti-inflammatory Evaluations of Pongamosides A-C, Natural Furanoflavonoid Glucosides from Fruit of Pongamia pinnata (L.) Pierre. JOURNAL OF NATURAL PRODUCTS 2022; 85:1118-1127. [PMID: 35352937 DOI: 10.1021/acs.jnatprod.2c00021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The syntheses of three natural furanoflavonoid glucosides, including two flavone glucosides, pongamosides A (1) and B (2), and a flavonol glucoside, pongamoside C (3), were achieved for the first time in 9-15 steps from commercially available materials in overall yields ranging from 2.9% to 29%. The synthetic sequence featured a NaH-promoted BK-VK rearrangement and acid-catalyzed intramolecular cyclization to furnish the furanoflavonoid aglycone. Meanwhile, phase-transfer-catalyzed glycosylation and Schmidt's trichloroacetimidate procedure were employed to establish the pivotal O-glycosidic linkage. The anti-inflammatory activities of compounds 1-3, as well as their aglycones 5a, 5b, and 23, were determined against NO production in the LPS-stimulated RAW264.7 cells. The results indicated that the O-glycosylation may reduce the anti-inflammatory activity of furanoflavonoid in vitro.
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Affiliation(s)
- Hongbo Dong
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy & Clinical Medical College & Affiliated Hospital, Chengdu University, Chengdu 610106, China
- Engineering Research Center for Pharmaceuticals and Equipment of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Min Wu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy & Clinical Medical College & Affiliated Hospital, Chengdu University, Chengdu 610106, China
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Ying Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy & Clinical Medical College & Affiliated Hospital, Chengdu University, Chengdu 610106, China
| | - Lan Lu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy & Clinical Medical College & Affiliated Hospital, Chengdu University, Chengdu 610106, China
| | - Jialan Qin
- Engineering Research Center for Pharmaceuticals and Equipment of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Yujiao He
- Engineering Research Center for Pharmaceuticals and Equipment of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Zheng Shi
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy & Clinical Medical College & Affiliated Hospital, Chengdu University, Chengdu 610106, China
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5
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Wu M, Xu LJ, Li Y, Yu P, Lu L, Xie ST, He YJ, Dong HB. First total syntheses of kanjone and its natural analogues. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2022; 25:1-10. [PMID: 35439092 DOI: 10.1080/10286020.2022.2065266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/08/2022] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Abstract
Kanjone (1), a bioactive furanoflavone and a potent biomolecule, was first isolated from Pongamia pinnata (L.). Herein, we have developed two approaches to synthesize kanjone as well as its natural analogues 6-methoxyisopongaglabol (2) and 6,3'-dimethoxy-[2″,3″:7,8]furanoflavone (3) starting from khellin and 3-hydroxy-4-methoxy-benzaldehyde, respectively.
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Affiliation(s)
- Min Wu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Li-Jia Xu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Ying Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Pei Yu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Lan Lu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Shi-Ting Xie
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
- Engineering Research Center for Engineering Pharmaceuticals and Equipments of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Yu-Jiao He
- Engineering Research Center for Engineering Pharmaceuticals and Equipments of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Hong-Bo Dong
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
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7
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Liao H, Ma J, Yao H, Liu XW. Recent progress of C-glycosylation methods in the total synthesis of natural products and pharmaceuticals. Org Biomol Chem 2018; 16:1791-1806. [DOI: 10.1039/c8ob00032h] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
C-Glycosylation has found widespread use in the synthesis of biomedically important natural products and pharmaceuticals.
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Affiliation(s)
- Hongze Liao
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Science
- Nanyang Technological University
- Singapore 637371
| | - Jimei Ma
- Department of Chemistry
- College of Science
- Huazhong Agricultural University
- Wuhan
- China
| | - Hui Yao
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Science
- Nanyang Technological University
- Singapore 637371
| | - Xue-Wei Liu
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Science
- Nanyang Technological University
- Singapore 637371
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Kitamura K, Ando Y, Matsumoto T, Suzuki K. Total Synthesis of Aryl C-Glycoside Natural Products: Strategies and Tactics. Chem Rev 2017; 118:1495-1598. [DOI: 10.1021/acs.chemrev.7b00380] [Citation(s) in RCA: 149] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kei Kitamura
- Department
of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Yoshio Ando
- Department
of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Takashi Matsumoto
- School
of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1
Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Keisuke Suzuki
- Department
of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
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