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Ma W, Wang S, Wang Y, Zeng J, Xu J, He X. Antiproliferative Amaryllidaceae alkaloids from the bulbs of Hymenocallis littoralis (Jacq.) Salisb. PHYTOCHEMISTRY 2022; 197:113112. [PMID: 35101748 DOI: 10.1016/j.phytochem.2022.113112] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 01/05/2022] [Accepted: 01/23/2022] [Indexed: 06/14/2023]
Abstract
Seven undescribed Amaryllidaceae alkaloids classified into four types, including the plicamine-type, secoplicamine-type, belladine-type and pretazettine-type, along with another three alkaloids that have not been isolated from plant material and seven known alkaloids, were isolated from the bulbs of Hymenocallis littoralis (Jacq.) Salisb. The structures were elucidated on the basis of various spectroscopic methods (UV, IR, MS, NMR, ECD). The isolated alkaloids were screened for antiproliferative activity against four human tumour cell lines (HepG2, HeLa, SPC-A-1, FaDu) through MTT assay, and some alkaloids exhibited potent cytotoxicity. Meanwhile, cell morphological assessment, flow cytometric analysis, Western blot analysis, clone formation and scratch wound assays were utilized for an undescribed belladine-type alkaloid and two known alkaloids, which had antiproliferative effects on the HepG2 cell line via induction of apoptosis in a dose-dependent manner. A pair of diastereoisomers of Amaryllidaceae alkaloids exhibited significant differences in antiproliferative activity. In addition, the alkaloids also possessed the potential to inhibit tumour cell migration.
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Affiliation(s)
- Wenjing Ma
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Siyu Wang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Yihai Wang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Engineering Research Center for Lead Compounds & Drug Discovery, Guangzhou, 510006, China.
| | - Jia Zeng
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Jingwen Xu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Engineering Research Center for Lead Compounds & Drug Discovery, Guangzhou, 510006, China
| | - Xiangjiu He
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Engineering Research Center for Lead Compounds & Drug Discovery, Guangzhou, 510006, China.
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2
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Berlinck RGS, Crnkovic CM, Gubiani JR, Bernardi DI, Ióca LP, Quintana-Bulla JI. The isolation of water-soluble natural products - challenges, strategies and perspectives. Nat Prod Rep 2021; 39:596-669. [PMID: 34647117 DOI: 10.1039/d1np00037c] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Covering period: up to 2019Water-soluble natural products constitute a relevant group of secondary metabolites notably known for presenting potent biological activities. Examples are aminoglycosides, β-lactam antibiotics, saponins of both terrestrial and marine origin, and marine toxins. Although extensively investigated in the past, particularly during the golden age of antibiotics, hydrophilic fractions have been less scrutinized during the last few decades. This review addresses the possible reasons on why water-soluble metabolites are now under investigated and describes approaches and strategies for the isolation of these natural compounds. It presents examples of several classes of hydrosoluble natural products and how they have been isolated. Novel stationary phases and chromatography techniques are also reviewed, providing a perspective towards a renaissance in the investigation of water-soluble natural products.
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Affiliation(s)
- Roberto G S Berlinck
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
| | - Camila M Crnkovic
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, CEP 05508-000, São Paulo, SP, Brazil
| | - Juliana R Gubiani
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
| | - Darlon I Bernardi
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
| | - Laura P Ióca
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
| | - Jairo I Quintana-Bulla
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
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Yan X, Zhao P, Liang H, Xie H, Jiang J, Gou S, Wang J. Rhodium(III)-Catalyzed Asymmetric C–H Activation of N-Methoxybenzamide with Quinone and Its Application in the Asymmetric Synthesis of a Dihydrolycoricidine Analogue. Org Lett 2020; 22:3219-3223. [DOI: 10.1021/acs.orglett.0c01002] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaoqiang Yan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Peng Zhao
- School of Chemistry and Chemical Engineering, State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Hao Liang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Hui Xie
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Jijun Jiang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Shaohua Gou
- School of Chemistry and Chemical Engineering, State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Jun Wang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
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Bingham TW, Hernandez LW, Olson DG, Svec RL, Hergenrother PJ, Sarlah D. Enantioselective Synthesis of Isocarbostyril Alkaloids and Analogs Using Catalytic Dearomative Functionalization of Benzene. J Am Chem Soc 2019; 141:657-670. [PMID: 30520639 PMCID: PMC6488038 DOI: 10.1021/jacs.8b12123] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantioselective total syntheses of the anticancer isocarbostyril alkaloids (+)-7-deoxypancratistatin, (+)-pancratistatin, (+)-lycoricidine, and (+)-narciclasine are described. Our strategy for accessing this unique class of natural products is based on the development of a Ni-catalyzed dearomative trans-1,2-carboamination of benzene. The effectiveness of this dearomatization approach is notable, as only two additional olefin functionalizations are needed to construct the fully decorated aminocyclitol cores of these alkaloids. Installation of the lactam ring has been achieved through several pathways and a direct interconversion between natural products was established via a late-stage C-7 cupration. Using this synthetic blueprint, we were able to produce natural products on a gram scale and provide tailored analogs with improved activity, solubility, and metabolic stability.
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Affiliation(s)
- Tanner W. Bingham
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Lucas W. Hernandez
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Daniel G. Olson
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Riley L. Svec
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Paul J. Hergenrother
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - David Sarlah
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
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Ghavre M, Froese J, Pour M, Hudlicky T. Synthesis of Amaryllidaceae Constituents and Unnatural Derivatives. Angew Chem Int Ed Engl 2016; 55:5642-91. [DOI: 10.1002/anie.201508227] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Indexed: 12/24/2022]
Affiliation(s)
- Mukund Ghavre
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Canada
| | - Jordan Froese
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Canada
| | - Milan Pour
- Department of Inorganic and Organic Chemistry, Faculty of Pharmacy Charles University Heyrovského 1203 CZ-500 03 Hradec Králové Czech Republic
| | - Tomas Hudlicky
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Canada
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6
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Ghavre M, Froese J, Pour M, Hudlicky T. Synthese von Inhaltsstoffen der Amaryllisgewächse und nichtnatürlichen Derivaten. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201508227] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Mukund Ghavre
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Kanada
| | - Jordan Froese
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Kanada
| | - Milan Pour
- Department of Inorganic and Organic Chemistry, Faculty of Pharmacy Charles University Heyrovského 1203 CZ-500 03 Hradec Králové Tschechische Republik
| | - Tomas Hudlicky
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Kanada
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Li Z, Kumar A, Vachhani DD, Sharma SK, Parmar VS, Van der Eycken EV. Regioselective Synthesis of Diversely Substituted Diazoninones Through a Post-Ugi Gold-Catalyzed Intramolecular Hydroarylation Process. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301507] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Kelebekli L. Rhodium-catalysed Nucleophilic Ring Opening Reaction of 1- and 3-ethoxy-5,8-epoxy-5,8-dihydroisoquinolines. JOURNAL OF CHEMICAL RESEARCH 2013. [DOI: 10.3184/174751913x13663103976700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
2-Ethoxy-3- and 5-chloropyridines were obtained from 2,3- and 2,5-dichloropyridine. Reaction of 2,3- and 2,5-dichlo-ropyridines with tBuLi in the presence of furan gave 1- and 3-ethoxy-5,8-epoxy-5,8-dihydroisoquinolines. The rhodium-catalysed ring-opening reaction of 1- and 3-ethoxy-5,8-epoxy-5,8-dihydroisoquinolines with 2-bromophenol furnished the isomer 7-(2-bromophenoxy)-1-ethoxy-7,8-dihydroisoquinolin-8-ol, 6-(2-bromophenoxy)-1-ethoxy-5,6-dihydroisoquinolin-5-ol and 7-(2-bromophenoxy)-3-ethoxy-7,8-dihydroisoquinolin-8-ol, 6-(2-bromophenoxy)-3-ethoxy-5,6-dihydroisoquinolin-5-ol respectively.
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Affiliation(s)
- Latif Kelebekli
- Department of Chemistry, Ordu University, 52200 Ordu, Turkey
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Pettit GR, Tan R, Bao GH, Melody N, Doubek DL, Gao S, Chapuis JC, Williams L. Antineoplastic agents. 587. Isolation and structure of 3-epipancratistatin from Narcissus cv. Ice Follies. JOURNAL OF NATURAL PRODUCTS 2012; 75:771-773. [PMID: 22413911 PMCID: PMC3372531 DOI: 10.1021/np200862y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Bioassay-guided (cancer cell line) separation of an extract prepared from Narcissus cv. Ice Follies (from The Netherlands) led to the isolation of a new Amaryllidaceae isocarbostiryl, 3-epipancratistatin (1b), as well as narciclasine (2). This Narcissus cultivar was found to be a good source of narciclasine. The structure of 1b was established by high-resolution mass and high-field 2D NMR spectroscopic analyses. Against a panel of murine and human cancer cell lines, 3-epipancratistatin (1b) led to cell growth inhibition (GI(50) 2.2-0.69 μg/mL) some 100× less than that found for pancratistatin (1a) and narciclasine (2), thereby revealing an important configurational requirement in 1a for strong cancer cell growth inhibition.
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Affiliation(s)
- George R Pettit
- Cancer Research Institute and Department of Chemistry and Biochemistry, Arizona State University, PO Box 871604, Tempe, Arizona 85287-1604, USA.
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Preclinical efficacy of sodium narcistatin to reduce inflammation and joint destruction in rats with adjuvant-induced arthritis. Rheumatol Int 2011; 32:3751-60. [PMID: 22159913 DOI: 10.1007/s00296-011-2217-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Accepted: 10/23/2011] [Indexed: 12/27/2022]
Abstract
Current therapies for the treatment of rheumatoid arthritis (RA) do not work for all patients, can lose efficacy over time, and can have significant side effects. The discovery of new, effective therapies for RA remains an unmet medical need. The Amaryllidaceae isocarbostyril narciclasine was previously shown to prophylactically reduce paw swelling in rats with adjuvant-induced arthritis (AA). In this study, the efficacy of sodium narcistatin (SNS), a water-soluble cyclic phosphate pro-drug of narciclasine, was assessed in AA rats for anti-inflammatory and bone-sparing properties after disease onset. AA rats were given daily intraperitoneal injections of SNS (1.75, 3.5, or 5 mg/kg/day, in 500 μl sterile endotoxin-free saline) or saline from disease onset through severe disease stages. Footpad widths and radiographic scoring were used as indicators of inflammation and joint destruction, respectively. Ex vivo cytokine production by peripheral blood mononuclear cells (PMBC), splenocytes, and draining lymph node (DLN) cells were determined using ELISAs. SNS treatment dose-dependently reduced joint inflammation (~70%) and bone loss (~50%) compared with AA controls. SNS treatment also reduced spleen weight (without affecting body weight), pro-inflammatory cytokine production by PMBC, splenocytes, and DLN cells, and site-dependently altered T-helper (Th)1-/Th2-type and anti-inflammatory cytokine profiles. SNS dramatically reduces inflammation and has bone-sparing properties, possibly by reducing immune cell pro-inflammatory cytokine production. Our findings support the development of SNS as a therapeutic for RA.
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Pandey G, Balakrishnan M, Swaroop PS. A Suzuki Cross-Coupling and Intramolecular Aza-Michael Addition Reaction Sequence Towards the Synthesis of 1,10b-epi-7-Deoxypancratistatins and Their Cytotoxicity Studies. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800830] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Appukkuttan P, Van der Eycken E. An Overview of Syntheses of Apogalanthamine Analogues and 7‐Aza Derivatives of Steganacin and Steganone. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800699] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Prasad Appukkuttan
- Department of Chemistry, Ludwig‐Maximilians‐Universität, Butenandtstraße 5–13, 81377 München, Germany
| | - Erik Van der Eycken
- Department of Chemistry, Laboratory for Organic and Microwave‐Assisted Chemistry (LOMAC), University of Leuven (K. U. Leuven), Celestijnenlaan 200F, 3001 Heverlee, Leuven, Belgium, Fax: +32‐16‐327990
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Kornienko A, Evidente A. Chemistry, biology, and medicinal potential of narciclasine and its congeners. Chem Rev 2008; 108:1982-2014. [PMID: 18489166 PMCID: PMC2856661 DOI: 10.1021/cr078198u] [Citation(s) in RCA: 262] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander Kornienko
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro, 801 Leroy Place, New Mexico 87801, USA.
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Ingrassia L, Lefranc F, Mathieu V, Darro F, Kiss R. Amaryllidaceae isocarbostyril alkaloids and their derivatives as promising antitumor agents. Transl Oncol 2008; 1:1-13. [PMID: 18607503 PMCID: PMC2510759 DOI: 10.1593/tlo.08100] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2008] [Revised: 01/29/2008] [Accepted: 01/29/2008] [Indexed: 11/18/2022] Open
Abstract
This review covers the isolation, total synthesis, biologic activity, and more particularly the in vitro and in vivo antitumor activities of naturally occurring isocarbostyril alkaloids from the Amaryllidaceae family. Starting from these natural products, new derivatives have been synthesized to explore structure-activity relationships within the chemical class and to obtain potential candidates for preclinical development. This approach appears to be capable of providing novel promising anticancer agents.
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Affiliation(s)
| | - Florence Lefranc
- Service de Neurochirurgie, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik, 808, B-1070 Brussels, Belgium
- Laboratoire de Toxicologie, Institut de Pharmacie, Université Libre de Bruxelles, Campus de la Plaine CP205/1, Boulevard du Triomphe, B-1050 Brussels, Belgium
| | - Véronique Mathieu
- Laboratoire de Toxicologie, Institut de Pharmacie, Université Libre de Bruxelles, Campus de la Plaine CP205/1, Boulevard du Triomphe, B-1050 Brussels, Belgium
| | - Francis Darro
- Unibioscreen SA, Avenue Joseph Wybran, B-1070 Brussels, Belgium
| | - Robert Kiss
- Laboratoire de Toxicologie, Institut de Pharmacie, Université Libre de Bruxelles, Campus de la Plaine CP205/1, Boulevard du Triomphe, B-1050 Brussels, Belgium
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Appukkuttan P, Dehaen W, Van der Eycken E. Microwave-Assisted Transition-Metal-Catalyzed Synthesis of N-Shifted and Ring-Expanded Buflavine Analogues. Chemistry 2007; 13:6452-60. [PMID: 17508369 DOI: 10.1002/chem.200700177] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Two novel and efficient strategies for the synthesis of hitherto unknown N-shifted and ring-expanded buflavine analogues are presented. Construction of the medium-sized ring system of the title molecules, a difficult task due to the high activation energy needed for the ring-closure with the additional rigidity imposed by the biaryl skeleton, was achieved by using Suzuki-Miyaura biaryl coupling and a ring-closing metathesis reaction as the key steps. The combination of a second-generation Grubbs catalyst and microwave irradiation proved to be highly useful in generating the otherwise difficult to obtain medium-sized ring system of the buflavine analogues.
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Affiliation(s)
- Prasad Appukkuttan
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
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Padwa A, Zhang H. Synthesis of some members of the hydroxylated phenanthridone subclass of the Amaryllidaceae alkaloid family. J Org Chem 2007; 72:2570-82. [PMID: 17338575 PMCID: PMC2475589 DOI: 10.1021/jo0626111] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The total synthesis of several members of the hydroxylated phenanthridone subclass of the Amaryllidaceae alkaloid family has been carried out. (+/-)-Lycoricidine and (+/-)-7-deoxypancratistatin were assembled through a one-pot Stille/intramolecular Diels-Alder cycloaddition cascade to construct the core skeleton. The initially formed [4+2]-cycloadduct undergoes nitrogen-assisted ring opening followed by a deprotonation/reprotonation of the resulting zwitterion to give a rearranged hexahydroindolinone on further heating at 160 degrees C. The stereochemical outcome of the IMDAF cycloaddition has the side arm of the tethered vinyl group oriented exo with respect to the oxygen bridge. The resulting cycloadduct was used for the stereocontrolled installation of the remaining functionality present in the C-ring of the target molecules. Key features of the synthetic strategy include (1) a lithium hydroxide induced tandem hydrolysis/decarboxylation/elimination sequence to introduce the required pi-bond in the C-ring of (+/-)-lycoricidine, and (2) conversion of the initially formed Diels-Alder adduct into an aldehyde intermediate which then undergoes a stereospecific decarbonylation reaction mediated by Wilkinson's catalyst to set the trans-B-C ring junction of (+/-)-7-deoxypancratistatin.
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Affiliation(s)
- Albert Padwa
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.
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Zhang H, Padwa A. An efficient synthesis of (+/-)-Lycoricidine featuring a Stille-IMDAF cycloaddition cascade. Org Lett 2006; 8:247-50. [PMID: 16408886 PMCID: PMC2587426 DOI: 10.1021/ol052524f] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A highly efficient total synthesis of (+/-)-Lycoricidine is described. The synthesis features the ready preparation of the Lycoricidine skeleton by a Stille-IMDAF cycloaddition cascade. The resulting cycloadduct is then used for the stereocontrolled installation of the other functionality present in the C-ring of the target molecule.
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Affiliation(s)
- Hongjun Zhang
- Department of Chemistry, Emory University, Atlanta, Georgia 30322 USA
| | - Albert Padwa
- Department of Chemistry, Emory University, Atlanta, Georgia 30322 USA
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Bastida J, Lavilla R, Viladomat F. Chemical and biological aspects of Narcissus alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2006; 63:87-179. [PMID: 17133715 PMCID: PMC7118783 DOI: 10.1016/s1099-4831(06)63003-4] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This chapter discusses the chemical and biological aspects of Narcissus alkaloids. Numerous alkaloids have been isolated from Narcissus speciesasaresult of the continuing search for novel alkaloids with pharmacological activity in the Amaryllidaceae family. The alkaloids isolated from this genus, classified in relation to the different skeleton types. The different Narcissus wild species and intersectional hybrids, grouped into subgenera and sections, with their corresponding alkaloids, arranged according to their ring system are listed. The biosynthetic pathways of Narcissus alkaloids includes: (1) enzymatic preparation of the precursors, (2) primary cyclization mechanisms, (3) enzymatic preparation of intermediates, (4) secondary cyclization, diversification, and restructuring. The chapter discusses proton nuclear magnetic resonance (1H NMR), carbon nuclear magnetic resonance (13C NMR), and mass spectrometry (MS) for Narcissus alkaloids. A list of the different Narcissus alkaloids, their spectroscopic properties, and literature with the most recent spectroscopic data is given. Several Narcissus extracts shows the following activities: antiviral, prophage induction, antibacterial, antifungal, antimalarial, insecticidal, cytotoxic, antitumor, antimitotic, antiplatelet, hypotensive, emetic, acetylcholine esterase inhibitory, antifertility, antinociceptive, chronotropic, pheromone, plant growth inhibitor, and allelopathic.
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Affiliation(s)
- Jaume Bastida
- Departament de Productes Naturals, Facultat de Farmàcia, Universitat de Barcelona, 08028 Barcelona, Spain
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Iwabuchi Y, Ogasawara K, Fujimura T, Shibuya M. An Enantio- and Diastereocontrolled Synthesis of (+)-7-Deoxy-trans-dihydronarciclasine. HETEROCYCLES 2005. [DOI: 10.3987/com-05-s(k)68] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Wang Q, Padwa A. Rh(I)-Catalyzed Ring Opening of an IMDAF-Derived Oxabicyclo Cycloadduct as the Key Step in the Synthesis of (±)-epi-Zephyranthine. Org Lett 2004; 6:2189-92. [PMID: 15200317 DOI: 10.1021/ol049348f] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A new strategy for epi-zephyranthine has been developed that is based in part on an extraordinarily facile intramolecular Diels-Alder reaction of a 2-imido-substituted furan. By using a Rh(I)-catalyzed ring opening of the resulting oxabicyclic adduct, the cis-diol stereochemistry of epi-zephyranthine was established.
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Affiliation(s)
- Qiu Wang
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
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Fennell CW, van Staden J. Crinum species in traditional and modern medicine. JOURNAL OF ETHNOPHARMACOLOGY 2001; 78:15-26. [PMID: 11585683 DOI: 10.1016/s0378-8741(01)00305-1] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Crinums are large, showy plants with umbels of lily-like flowers. They are found in tropical and subtropical regions throughout the world, where, for centuries, they have been used traditionally to cure ailments and diseases. Sometimes they are prescribed for the same medicinal purpose. This would suggest that they contain a common ingredient. Phytochemical analysis has recently yielded a vast array of compounds, including more than 150 different alkaloids. These are of the Amaryllidaceae type, whose most noted effects are: analgesic, anticholinergic, antitumour and antiviral. Even though much has been reported on the medicinal properties of Crinum, only an estimated 20% of the species worldwide are represented in these analyses, as reviewed in this paper.
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Affiliation(s)
- C W Fennell
- Research Centre for Plant Growth and Development, School of Botany and Zoology, Faculty of Science and Agriculture, University of Natal-Pietermaritzburg, Private Bag X01, 3209, Scottsville, South Africa
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