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Nguemdjo Chimeze VW, Bankoglu EE, Zühlke S, Fannang VS, Eckelmann D, Chi Shirri J, Djuidje EN, Djama CM, Stopper H, Wandji J. Cytotoxic and genotoxic properties of artathomsonine, a new oxoberberine alkaloid from Artabotrys thomsonii (annonaceae). Nat Prod Res 2022; 36:2791-2799. [PMID: 34000924 DOI: 10.1080/14786419.2021.1928117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/28/2021] [Accepted: 05/04/2021] [Indexed: 10/21/2022]
Abstract
A phytochemical investigation of the liana of Artabotrys thomsonii led to the isolation of a new oxoberberine alkaloid, 2,10-dihydroxy-3,9-dimethoxy-8-oxo-protoberberine (7), along with six known compounds. Their chemical structures were elucidated by 1 D and 2 D NMR spectroscopic methods and HRESI-MSn data analysis. Compounds 4 and 7 were selected for further in vitro investigations. In accordance with expectations from their chemical structures, compounds 7 and 4 showed a clear antioxidant activity in a cell-free assay, with compound 7 being 7-fold more active than 4. Cytotoxicity, cytostatic and genotoxic effects only occurred at high micromolar concentrations of 50 µM or more. Compound 7 was slightly less effective than compound 4. A low micromolar concentration of 10 µM did not cause any damaging cellular effects but showed potential for a protection against the micronucleus-inducing effect of reactive oxygen species hydrogen peroxide, although not to a significant extent.
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Affiliation(s)
- Valery Wilfried Nguemdjo Chimeze
- Institute of Environmental Research (INFU), Department of Chemistry and Chemical Biology, Chair of Environmental Chemistry and Analytical Chemistry, TU Dortmund, Dortmund, Germany
- Laboratory of Natural Products and Heterocyclic Synthesis, Department of Organic Chemistry, Faculty of Sciences, University of Yaounde I, Yaounde, Cameroon
| | - Ezgi Eyluel Bankoglu
- Institute of Pharmacology and Toxicology, University of Wuerzburg, Wuerzburg, Germany
| | - Sebastian Zühlke
- Institute of Environmental Research (INFU), Department of Chemistry and Chemical Biology, Chair of Environmental Chemistry and Analytical Chemistry, TU Dortmund, Dortmund, Germany
| | - Véronique Simone Fannang
- Department of Pharmacy, Faculty of Medicine and Pharmaceutical Sciences, University of Douala, Douala, Cameroon
| | - Dennis Eckelmann
- Institute of Environmental Research (INFU), Department of Chemistry and Chemical Biology, Chair of Environmental Chemistry and Analytical Chemistry, TU Dortmund, Dortmund, Germany
| | - Jovita Chi Shirri
- Department of Chemistry, Faculty of Sciences, University of Buea, Buea, Cameroon
| | | | - Céline Mbazoa Djama
- Laboratory of Natural Products and Heterocyclic Synthesis, Department of Organic Chemistry, Faculty of Sciences, University of Yaounde I, Yaounde, Cameroon
| | - Helga Stopper
- Institute of Pharmacology and Toxicology, University of Wuerzburg, Wuerzburg, Germany
| | - Jean Wandji
- Laboratory of Natural Products and Heterocyclic Synthesis, Department of Organic Chemistry, Faculty of Sciences, University of Yaounde I, Yaounde, Cameroon
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Shao T, Gong Z, Su T, Hao W, Che C. A practical and efficient approach to imidazo[1,2- a]pyridine-fused isoquinolines through the post-GBB transformation strategy. Beilstein J Org Chem 2017; 13:817-824. [PMID: 28546839 PMCID: PMC5433183 DOI: 10.3762/bjoc.13.82] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 04/13/2017] [Indexed: 01/05/2023] Open
Abstract
Diversity-oriented synthesis of the biologically intriguing imidazo[1,2-a]pyridine-fused isoquinoline systems from readily available starting materials was achieved through the Groebke–Blackburn–Bienaymé reaction followed by a gold-catalyzed cyclization strategy. The synthetic approach is characterized by mild reaction conditions and a broad substrate scope, allowing for the rapid construction of structurally complex and diverse heterocycles in moderate to good yields.
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Affiliation(s)
- Taofeng Shao
- Laboratory of Chemical Genomics, Engineering Laboratory for Chiral Drug Synthesis, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhiming Gong
- Laboratory of Chemical Genomics, Engineering Laboratory for Chiral Drug Synthesis, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Tianyi Su
- Laboratory of Chemical Genomics, Engineering Laboratory for Chiral Drug Synthesis, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Wei Hao
- Laboratory of Chemical Genomics, Engineering Laboratory for Chiral Drug Synthesis, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Chao Che
- Laboratory of Chemical Genomics, Engineering Laboratory for Chiral Drug Synthesis, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
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4
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Ruiz S, Villuendas P, Ortuño MA, Lledós A, Urriolabeitia EP. Ruthenium-Catalyzed Oxidative Coupling of Primary Amines with Internal Alkynes through CH Bond Activation: Scope and Mechanistic Studies. Chemistry 2015; 21:8626-36. [DOI: 10.1002/chem.201500338] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Indexed: 12/11/2022]
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5
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Synthesis of Natural Products on Solid Phases via Copper-Mediated Coupling: Synthesis of the Aristogin Family, Spiraformin A, and Hernandial. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900632] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Grycová L, Dostál J, Marek R. Quaternary protoberberine alkaloids. PHYTOCHEMISTRY 2007; 68:150-75. [PMID: 17109902 DOI: 10.1016/j.phytochem.2006.10.004] [Citation(s) in RCA: 300] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Revised: 09/18/2006] [Accepted: 10/03/2006] [Indexed: 05/12/2023]
Abstract
This contribution reviews some general aspects of the quaternary iminium protoberberine alkaloids. The alkaloids represent a very extensive group of secondary metabolites with diverse structures, distribution in nature, and biological effects. The quaternary protoberberine alkaloids (QPA), derived from the 5,6-dihydrodibenzo[a,g]quinolizinium system, belong to a large class of isoquinoline alkaloids. Following a general introduction, the plant sources of QPA, their biosynthesis, and procedures for their isolation are discussed. Analytical methods and spectral data are summarized with emphasis on NMR spectroscopy. The reactivity of QPA is characterized by the sensitivity of the iminium bond CN(+) to nucleophilic attack. The addition of various nucleophiles to the protoberberine skeleton is discussed. An extended discussion of the principal chemical reactivity is included since this governs interactions with biological targets. Quaternary protoberberine alkaloids and some related compounds exhibit considerable biological activities. Recently reported structural studies indicate that the QPA interact with nucleic acids predominantly as intercalators or minor groove binders. Currently, investigations in many laboratories worldwide are focused on the antibacterial and antimalarial activity, cytotoxicity, and potential genotoxicity of QPA.
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Affiliation(s)
- Lenka Grycová
- National Center for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5/A4, CZ-625 00 Brno, Czech Republic
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Lin G, Chan SSK, Chung HS, Li SL. Chemistry and biological activities of naturally occurring phthalides. BIOACTIVE NATURAL PRODUCTS (PART L) 2005. [DOI: 10.1016/s1572-5995(05)80065-1] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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8
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Kuo RY, Wu CC, Chang FR, Yeh JL, Chen IJ, Wu YC. Antiplatelet activity of synthetic pyrrolo-benzylisoquinolines. Bioorg Med Chem Lett 2003; 13:821-3. [PMID: 12617899 DOI: 10.1016/s0960-894x(03)00003-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Pyrrolo-benzylisoquinolines were prepared as target compounds and their antiplatelet aggregation activity, adreno-receptor affinity, and cytotoxicity were screened. Compounds 1d-9d showed specific antiplatelet aggregation activity induced by arachidonic acid and collagen. Among them, 8d and 9d exhibited better activity than the reference drug, aspirin and 9d also showed inhibition of platelet aggregation by all four inducers.
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Affiliation(s)
- Reen-Yen Kuo
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan
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Gremmen C, Wanner MJ, Koomen GJ. Enantiopure tetrahydroisoquinolines via N -sulfinyl Pictet–Spengler reactions. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01854-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bringmann G, Wohlfarth M, Rischer H, Heubes M, Saeb W, Diem S, Herderich M, Schlauer J. A photometric screening method for dimeric naphthylisoquinoline alkaloids and complete on-line structural elucidation of a dimer in crude plant extracts, by the LC-MS/LC-NMR/LC-CD triad. Anal Chem 2001; 73:2571-7. [PMID: 11403302 DOI: 10.1021/ac001503q] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient evaluation procedure for the chemical screening and on-line structural elucidation of dimeric naphthylisoquinoline alkaloids has been developed. The method is based on the lead tetraacetate oxidation of the central binaphthalene core of the alkaloids. UV spectra of the extracts after addition of the oxidant show, in the presence of naphthylisoquinoline dimers, the appearance of a characteristic long-wavelength absorption indicative of dinaphthoquinones. The efficiency and relevance of the method has been demonstrated in the discovery of a constitutionally and configurationally new dimeric naphthylisoquinoline alkaloid, named ancistrogriffithine A (4), from the previously uninvestigated Asian liana Ancistrocladus griffithii. After verification of this screening result by LC-ESI-MS/MS, the constitution and the relative configuration of the compound were elucidated on line, by LC-NMR and LC-CD on the extract. Using an LC-NMR-WET-ROESY experiment, itwas possible for the first time to determine the relative axial configuration of a natural biaryl compound on line, by observing long-range ROE interactions. Finally, an oxidative degradation right on the extract delivered the absolute configuration of 4, without isolation of the alkaloid. Ancistrogriffithine A is the as yet only dimeric naphthylisoquinoline from an Asian Ancistrocladaceae plant.
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Affiliation(s)
- G Bringmann
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, Germany.
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