1
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Wu J, Liu Y, Kozlowski MC. Visible-light TiO 2-catalyzed synthesis of dihydrobenzofurans by oxidative [3 + 2] annulation of phenols with alkenyl phenols. Chem Sci 2024; 15:7150-7159. [PMID: 38756810 PMCID: PMC11095367 DOI: 10.1039/d4sc00723a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 03/25/2024] [Indexed: 05/18/2024] Open
Abstract
An oxidative strategy for the preparation of dihydrobenzofurans via heterogeneous photocatalysis is reported. This method leverages the surface interaction between the alkenyl phenol and the TiO2 solid surface, which enables direct activation by visible light without the need for pre-functionalization or surface modification. The resulting alkenyl phenoxyl radical is proposed to be selectively captured by a neutral phenol nucleophile, rendering β-5' coupling with excellent chemo- and regio-selectivity. The reaction proceeds under benign conditions, using an inexpensive, nontoxic, and recyclable photocatalyst under visible light irradiation with air as the terminal oxidant at room temperature.
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Affiliation(s)
- Jingze Wu
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania Philadelphia Pennsylvania 19104 USA
| | - Yaning Liu
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania Philadelphia Pennsylvania 19104 USA
| | - Marisa C Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania Philadelphia Pennsylvania 19104 USA
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2
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Totini Dos Santos CH, Petrica EEA, Nastri de Luca Batista A, Delphino Rodrigues E, Garcez WS, Ferreira de Albuquerque AC, Dos Santos FM, Batista JM, Garcez FR. 7.1',8.3'- and 7.3',8.5'-Connected Bicyclo[3.2.1]octanoids and Oxabicyclo[3.2.2]nonane-Type Neolignans from Ocotea aciphylla: Structures and Absolute Configurations. JOURNAL OF NATURAL PRODUCTS 2024; 87:456-469. [PMID: 38395785 DOI: 10.1021/acs.jnatprod.3c01013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
The phytochemical investigation of the leaves and trunk bark of a specimen of Ocotea aciphylla collected in the southern portion of the Amazon forest led to the isolation of an oxabicyclo[3.2.2]nonane-type neolignan and 15 bicyclo[3.2.1]octanoid neolignans, 14 of which are unreported compounds (2-15), including one with an unusual oxidation pattern of the side chain at C-1' and two rare 7.1',8.3'-connected bicyclo[3.2.1]octanoid derivatives. Their structures and relative configurations were determined by extensive spectrometric analysis based on 1D- and 2D-NMR spectroscopy and HRESIMS data, while their absolute configurations were unambiguously assigned using electronic and vibrational circular dichroism data assisted by density functional theory calculations. Additionally, known sesquiterpenes, phenylpropanoids, and phytosterols were also isolated.
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Affiliation(s)
| | | | | | | | - Walmir Silva Garcez
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Campo Grande, MS 79074-460, Brazil
| | | | | | - João Marcos Batista
- Institute of Science and Technology, Federal University of São Paulo, São José dos Campos, SP 12231-280, Brazil
| | - Fernanda Rodrigues Garcez
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Campo Grande, MS 79074-460, Brazil
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3
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Batista ANL, Santos CHT, de Albuquerque ACF, Santos FM, Garcez FR, Batista JM. Absolute configuration reassignment of nectamazin A: Implications to related neolignans. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 304:123283. [PMID: 37633100 DOI: 10.1016/j.saa.2023.123283] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 08/11/2023] [Accepted: 08/18/2023] [Indexed: 08/28/2023]
Abstract
The ability of nature to produce structurally complex molecules makes the determination of the absolute configuration of natural products a challenging task. Although extensive NMR analysis generally allows for the reliable assignment of relative configurations, the assignments of absolute stereochemistry are commonly performed by empirical comparisons of optical rotation (OR) and/or electronic circular dichroism (ECD) data obtained for related molecules. Such an approach, however, may lead to misassignments and consequent error propagations. Herein, we present the case of the bicyclo(3.2.1)octane neolignan named (+)-nectamazin A. This compound was first reported in 2009 from Nectandra amazonum Nees. (Lauraceae) and had its absolute configuration determined as 7R,8S,3'S,4'R,5'S by means of experimental ECD spectroscopy. Our chemical studies on Ocotea aciphylla (Lauraceae) led to the isolation of (+)-nectamazin A. The extensive analysis of OR, ECD, and vibrational CD data aided by quantum chemical calculations, however, indicated (+)-nectamazin A to have the 7S,8R,3'R,4'S,5'R absolute configuration, in conflict with the configuration reported in the literature. The cause of the original incorrect assignment of (+)-nectamazin A derives from the direct comparison of experimental OR and ECD data obtained for structurally related molecules with different chromophoric systems. As an alternative, VCD spectroscopy is presented as a more reliable and sensitive technique to stereochemical investigations of bicyclo(3.2.1)octane neolignans.
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Affiliation(s)
- Andrea N L Batista
- Universidade Federal Fluminense, Instituto de Química, Outeiro de São João Batista s/n, Niterói, RJ 24020-141, Brazil
| | - Carlos Henrique T Santos
- Universidade Federal de Mato Grosso do Sul, Instituto de Química, Av. Senador Filinto Muller 1555, Campo Grande, MS 79074-460, Brazil
| | - Ana Carolina F de Albuquerque
- Universidade Federal Fluminense, Instituto de Química, Outeiro de São João Batista s/n, Niterói, RJ 24020-141, Brazil
| | - Fernando M Santos
- Universidade Federal Fluminense, Instituto de Química, Outeiro de São João Batista s/n, Niterói, RJ 24020-141, Brazil
| | - Fernanda R Garcez
- Universidade Federal de Mato Grosso do Sul, Instituto de Química, Av. Senador Filinto Muller 1555, Campo Grande, MS 79074-460, Brazil.
| | - João M Batista
- Universidade Federal de São Paulo, Instituto de Ciência e Tecnologia, Rua Talim 330, São José dos Campos, SP 12231-280, Brazil.
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4
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Xiao CY, Sun ZL, Huang J, Li RS, He JM, Gibbons S, Ju DW, Mu Q. Neolignans from Piper betle Have Synergistic Activity against Antibiotic-Resistant Staphylococcus aureus. J Org Chem 2021; 86:11072-11085. [PMID: 33439020 DOI: 10.1021/acs.joc.0c02682] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A phytochemical investigation of an extract of the leaves of Piper betle, guided by a synergistic antibacterial screen, led to the isolation and structural elucidation of 10 new neolignans, Pibeneolignan A-J (1-10), together with 11 known compounds. The structures and absolute configurations of the new compounds were elucidated on the basis of spectroscopic data, single-crystal X-ray diffraction analysis, and experimental and calculated ECD investigations. Compounds 1 and 2 are new naturally occurring neolignan skeletons, based on the cyclohept-2-ene-1,4-dione framework. We propose that these natural products are biosynthetically formed from bicyclic [3.2.1] neolignans by oxidative cleavage and ring opening at C-1' and C-2'. Among these compounds, 9, 13, 15, and 16, in combination with norfloxacin against an effluxing S. aureus strain (SA1199B), exhibited significant synergistic activity with fractional inhibitory concentration indices (FICIs) of 0.078, 0.156, 0.125, and 0.25, respectively. Bacterial growth curves, ethidium bromide (EtBr) efflux, and qRt-PCR were further employed to verify their synergistic antibacterial mechanism. Furthermore, computational molecular modeling suggested the binding of compounds 14-17 and 19 to the active site of the modeled structure of the NorA efflux pump, which is the main efflux pump in SA1199B.
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Affiliation(s)
- Chuan-Yun Xiao
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Zhong-Lin Sun
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Jiao Huang
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Rong-Sheng Li
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Jian-Ming He
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Simon Gibbons
- School of Pharmacy, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Dian-Wen Ju
- School of Pharmacy, Fudan University, Shanghai 201203, China.,Shanghai Engineering Research Center of ImmunoTherapeutics, Shanghai 201203, China
| | - Qing Mu
- School of Pharmacy, Fudan University, Shanghai 201203, China
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Park I, Byun HS, Hur GM, Na M. Tulipiferamide A, an Alkamide from Liriodendron tulipifera, Exhibits an Anti-Inflammatory Effect via Targeting IKKβ Phosphorylation. JOURNAL OF NATURAL PRODUCTS 2021; 84:1598-1606. [PMID: 33939429 DOI: 10.1021/acs.jnatprod.1c00146] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Three new alkamides, tulipiferamides A-C (1-3, respectively), and 30 known compounds (4-33) were obtained from the roots of Liriodendron tulipifera (Magnoliaceae). Dehydrotemisin (4), an elemane sesquiterpene lactone, was isolated for the first time from nature. The structures were deduced by the interpretation of NMR spectroscopic and MS spectral data. The geometries of the double bonds in tulipiferamides A-C (1-3, respectively) were determined on the basis of 1H-1H coupling constants and 13C chemical shifts. The presence of the alkamide type in this plant is reported for the first time. An analysis of the inflammatory response revealed that seven compounds (1, 4, 7, 9, 14, 23, and 27) suppressed the nitric oxide production induced by LPS in RAW264.7 macrophages. Furthermore, tulipiferamide A (1) inhibits NF-κB activation by selectively targeting IKKβ, an upstream kinase of NF-κB, resulting in the suppression of inflammatory mediators, including iNOS, COX-2, IL-1β, TNFα, and IL-6. Our results provide a rationale for the further development of tulipiferamide A as a selective IKKβ inhibitor to modulate inflammatory diseases.
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Affiliation(s)
- InWha Park
- College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Hee Sun Byun
- Department of Pharmacology and Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, 35015, Republic of Korea
| | - Gang Min Hur
- Department of Pharmacology and Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, 35015, Republic of Korea
| | - MinKyun Na
- College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
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6
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Dong K, Zhao CY, Wang XJ, Wu LZ, Liu Q. Bioinspired Selective Synthesis of Heterodimer 8-5' or 8- O-4' Neolignan Analogs. Org Lett 2021; 23:2816-2820. [PMID: 33721496 DOI: 10.1021/acs.orglett.1c00762] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The bioinspired synthesis of heterodimer neolignan analogs is reported by single-electron oxidation of both alkenyl phenols and phenols individually, followed by a combination of the resultant radicals. This oxidative radical cross-coupling strategy can afford heterodimer 8-5' or 8-O-4' neolignan analogs selectively with the use of air as the terminal oxidant and copper acetate as the catalyst at room temperature.
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7
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Asymmetric Intramolecular Hydroalkoxylation of Unactivated Alkenes Catalyzed by Chiral
N‐
Triflyl
Phosphoramide and
TiCl
4
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.201900544] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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8
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Tajuddeen N, Van Heerden FR. Antiplasmodial natural products: an update. Malar J 2019; 18:404. [PMID: 31805944 PMCID: PMC6896759 DOI: 10.1186/s12936-019-3026-1] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 11/21/2019] [Indexed: 11/25/2022] Open
Abstract
Background Malaria remains a significant public health challenge in regions of the world where it is endemic. An unprecedented decline in malaria incidences was recorded during the last decade due to the availability of effective control interventions, such as the deployment of artemisinin-based combination therapy and insecticide-treated nets. However, according to the World Health Organization, malaria is staging a comeback, in part due to the development of drug resistance. Therefore, there is an urgent need to discover new anti-malarial drugs. This article reviews the literature on natural products with antiplasmodial activity that was reported between 2010 and 2017. Methods Relevant literature was sourced by searching the major scientific databases, including Web of Science, ScienceDirect, Scopus, SciFinder, Pubmed, and Google Scholar, using appropriate keyword combinations. Results and Discussion A total of 1524 compounds from 397 relevant references, assayed against at least one strain of Plasmodium, were reported in the period under review. Out of these, 39% were described as new natural products, and 29% of the compounds had IC50 ≤ 3.0 µM against at least one strain of Plasmodium. Several of these compounds have the potential to be developed into viable anti-malarial drugs. Also, some of these compounds could play a role in malaria eradication by targeting gametocytes. However, the research into natural products with potential for blocking the transmission of malaria is still in its infancy stage and needs to be vigorously pursued.
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Affiliation(s)
- Nasir Tajuddeen
- School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg, 3209, South Africa
| | - Fanie R Van Heerden
- School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg, 3209, South Africa.
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9
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Lorsbach BA, Sparks TC, Cicchillo RM, Garizi NV, Hahn DR, Meyer KG. Natural products: a strategic lead generation approach in crop protection discovery. PEST MANAGEMENT SCIENCE 2019; 75:2301-2309. [PMID: 30672097 DOI: 10.1002/ps.5350] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/16/2019] [Accepted: 01/19/2019] [Indexed: 05/14/2023]
Abstract
With the anticipated population growth in the coming decades, the changing regulatory environment, and the continued emergence of resistance to commercial pesticides, there is a constant need to discover new lead chemistries with novel modes of action. We have established a portfolio of approaches to accelerate lead generation. One of these approaches capitalizes on the rich bioactivity of natural products (NPs), highlighted by the numerous examples of NP-based crop protection compounds. Within Corteva Agriscience and the affiliated preceding companies, NPs have been a fruitful approach, for nearly three decades, to identifying and bringing to the market crop protection products inspired by or originating from NPs, . Included in these NP-based crop protection products are the spinosyns family of insecticides, and those from more recent areas of NP-based fungicidal chemistry, as highlighted in this perspective. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Beth A Lorsbach
- Corteva Agriscience™, Agriculture Division of DowDuPont™, Crop Protection Discovery, Dow AgroSciences, Indianapolis, IN, USA
| | - Thomas C Sparks
- Corteva Agriscience™, Agriculture Division of DowDuPont™, Crop Protection Discovery, Dow AgroSciences, Indianapolis, IN, USA
| | - Robert M Cicchillo
- Corteva Agriscience™, Agriculture Division of DowDuPont™, Crop Protection Discovery, Dow AgroSciences, Indianapolis, IN, USA
| | - Negar V Garizi
- Corteva Agriscience™, Agriculture Division of DowDuPont™, Crop Protection Discovery, Dow AgroSciences, Indianapolis, IN, USA
| | - Donald R Hahn
- Corteva Agriscience™, Agriculture Division of DowDuPont™, Crop Protection Discovery, Dow AgroSciences, Indianapolis, IN, USA
| | - Kevin G Meyer
- Corteva Agriscience™, Agriculture Division of DowDuPont™, Crop Protection Discovery, Dow AgroSciences, Indianapolis, IN, USA
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10
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Dai Y, Liu Y, Rakotondraibe LH. Novel Bioactive Natural Products Isolated from Madagascar Plants and Marine Organisms (2009-2017). Chem Pharm Bull (Tokyo) 2018; 66:469-482. [PMID: 29710044 DOI: 10.1248/cpb.c17-00395] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Madagascar's rain forests and tropical dry forests are home to numerous endemic plant species and the island is considered a biodiversity hotspot. About 80% of the Madagascan (Malagasy) population relies on traditional medicines that have been proven to contain a variety of biologically active compounds. In the search for bioactive compounds from Madagascan biodiversity, we accessed and collected most of the literature dealing with the isolation, structure elucidation, and biological activities of organic small molecules originating from Madagascan plants and marine organisms. Since we published the first review of this work in 2009 (Curr. Med. Chem., 17, 2010, Hou and Harinantenaina), the present paper covers the isolation, structures, and bioactivity of 182 new secondary metabolites isolated from Malagasy higher plants and marine organisms in the last seven years (2009-2017).
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Affiliation(s)
- Yumin Dai
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech
| | - Yixi Liu
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech
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11
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Latif A, Du Y, Dalal SR, Fernández-Murga ML, Merino EF, Cassera MB, Goetz M, Kingston DGI. Bioactive Neolignans and Other Compounds from Magnolia grandiflora L.: Isolation and Antiplasmodial Activity. Chem Biodivers 2017. [PMID: 28621040 DOI: 10.1002/cbdv.201700209] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Bioassay-guided fractionation of a methanol extract of Magnolia grandiflora against Plasmodium falciparum yielded two new (1 and 2) and six known (3 - 8) bioactive compounds. The structures of the new compounds were assigned by mass spectrometric and 1D- and 2D-NMR data. Known compounds were identified by comparison of 1 H-NMR and MS data with literature data. The two known neolignans 3 and 4 showed moderate antiplasmodial activity with the IC50 values of 2.8 ± 0.1 and 3.4 ± 0.1 μm, respectively. Weak antiplasmodial activity was recorded for compounds 1, 2, 5, 6, 7, and 8, with the IC50 values of 38 ± 2, 23 ± 2, 16.5 ± 0.2, 86 ± 1, 44 ± 4, and 114 ± 9 μm, respectively.
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Affiliation(s)
- Abdul Latif
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Yongle Du
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Seema R Dalal
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Maria L Fernández-Murga
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Emilio F Merino
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Maria B Cassera
- Department of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Michael Goetz
- Natural Products Discovery Institute, 3805 Old Easton Road, Doylestown, PA, 18902, USA
| | - David G I Kingston
- Department of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, VA, 24061, USA
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Abstract
This first phytochemical study of leaves of Ocotea caudata led to the isolation of ten isoquinoline alkaloids, one of them previously unreported, S-(+)-9-O-demethylnorpreocoteine (1), three known flavonoids, two phenols, two eudesmane type sesquiterpenoids, one proline derivative, one fatty alcohol and a phytosterol. Their structures were elucidated on the basis of extensive 1D and 2D NMR spectroscopic analyses including HSQC, HMBC, 1H-1H COSY, NOESY, as well as HRESIMS data in addition to comparison with reports in the literature.
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Affiliation(s)
| | - Luis Enrique Cuca Suárez
- b Facultad de Ciencias, Departamento de Química, Laboratorio de Investigación en Productos Naturales Vegetales , Universidad Nacional de Colombia , Bogotá DC , Colombia
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13
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Tshitenge DT, Feineis D, Awale S, Bringmann G. Gardenifolins A-H, Scalemic Neolignans from Gardenia ternifolia: Chiral Resolution, Configurational Assignment, and Cytotoxic Activities against the HeLa Cancer Cell Line. JOURNAL OF NATURAL PRODUCTS 2017; 80:1604-1614. [PMID: 28488862 DOI: 10.1021/acs.jnatprod.7b00180] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
From the tropical plant Gardenia ternifolia Schumach. and Thonn. (Rubiaceae), eight stereoisomeric 2,3-dihydrobenzo[b]furan neolignans, named gardenifolins A-H (1a-d and 2a-d), were isolated and fully structurally characterized. Reversed-phase chromatography of a stem bark extract afforded two peaks, viz. mixtures I and II, each one consisting of two diastereomers and their respective enantiomers. They were resolved and stereochemically analyzed by HPLC on a chiral phase coupled to electronic circular dichroism (ECD) spectroscopy, giving single ECD spectra of all eight stereoisomers. The double-bond geometries (E or Z) of the gardenifolins A-H and their relative configurations (cis or trans) at the stereogenic centers C-7 and C-8 in the dihydrofuran ring system were assigned by 1D and 2D NMR methods, in particular, using NOE difference experiments, whereas the absolute configurations of the isolated enantiomers were established by ECD spectroscopy by applying the reversed helicity rule. The individual pure gardenifolin isomers A-H showed the most different cytotoxic effects against the human cancer HeLa cell line, with 1d and 2a displaying the highest activities, with IC50 values of 21.0 and 32.5 μM, respectively. Morphological experiments indicated that gardenifolin D (1d) induces apoptosis of HeLa cells at 25 μM.
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Affiliation(s)
- Dieudonné Tshitenge Tshitenge
- Institute of Organic Chemistry, University of Würzburg , Am Hubland, D-97074 Würzburg, Germany
- Faculty of Pharmaceutical Sciences, University of Kinshasa , B.P. 212, Kinshasa XI, Democratic Republic of the Congo
| | - Doris Feineis
- Institute of Organic Chemistry, University of Würzburg , Am Hubland, D-97074 Würzburg, Germany
| | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama , 2630 Sugitani, Toyama 930-0194, Japan
| | - Gerhard Bringmann
- Institute of Organic Chemistry, University of Würzburg , Am Hubland, D-97074 Würzburg, Germany
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14
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Teponno RB, Kusari S, Spiteller M. Recent advances in research on lignans and neolignans. Nat Prod Rep 2017; 33:1044-92. [PMID: 27157413 DOI: 10.1039/c6np00021e] [Citation(s) in RCA: 281] [Impact Index Per Article: 40.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Covering: 2009 to 2015Lignans and neolignans are a large group of natural products derived from the oxidative coupling of two C6-C3 units. Owing to their biological activities ranging from antioxidant, antitumor, anti-inflammatory to antiviral properties, they have been used for a long time both in ethnic as well as in conventional medicine. This review describes 564 of the latest examples of naturally occurring lignans and neolignans, and their glycosides in some cases, which have been isolated between 2009 and 2015. It comprises the data reported in more than 200 peer-reviewed articles and covers their source, isolation, structure elucidation and bioactivities (where available), and highlights the biosynthesis and total synthesis of some important ones.
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Affiliation(s)
- Rémy Bertrand Teponno
- Institute of Environmental Research (INFU), Department of Chemistry and Chemical Biology, Chair of Environmental Chemistry and Analytical Chemistry, TU Dortmund, Otto-Hahn-Str. 6, 44221 Dortmund, Germany. and Department of Chemistry, Faculty of Science, University of Dschang, P. O. Box 67, Dschang, Cameroon
| | - Souvik Kusari
- Institute of Environmental Research (INFU), Department of Chemistry and Chemical Biology, Chair of Environmental Chemistry and Analytical Chemistry, TU Dortmund, Otto-Hahn-Str. 6, 44221 Dortmund, Germany.
| | - Michael Spiteller
- Institute of Environmental Research (INFU), Department of Chemistry and Chemical Biology, Chair of Environmental Chemistry and Analytical Chemistry, TU Dortmund, Otto-Hahn-Str. 6, 44221 Dortmund, Germany.
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15
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Williams RB, Martin SM, Lawrence JA, Norman VL, O'Neil-Johnson M, Eldridge GR, Starks CM. Isolation and Identification of the Novel Tubulin Polymerization Inhibitor Bifidenone. JOURNAL OF NATURAL PRODUCTS 2017; 80:616-624. [PMID: 28335606 DOI: 10.1021/acs.jnatprod.6b00893] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The pursuit of structurally novel compounds has led to the isolation of a series of neolignans (2-6), for which the structures have been determined from microgram quantities using microcryoprobe NMR technology. Compounds 2-6 provided some unexpectedly clear structure-activity relationship data, with compound 2 demonstrating significantly more potency in the in vitro cytotoxicity assay than the other analogues. Further screening found that compound 2 induces apoptosis with activation of caspase 3/7. The NCI Compare algorithm suggested that compound 2 acts through the inhibition of tubulin/microtubule dynamics. Compound 2 was confirmed to be a tubulin polymerization inhibitor that binds directly to tubulin.
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Affiliation(s)
- Russell B Williams
- Lead Discovery and Rapid Structure Elucidation Group, Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive, St. Louis, Missouri 63114, United States
| | - Steven M Martin
- Lead Discovery and Rapid Structure Elucidation Group, Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive, St. Louis, Missouri 63114, United States
| | - Julie A Lawrence
- Lead Discovery and Rapid Structure Elucidation Group, Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive, St. Louis, Missouri 63114, United States
| | - Vanessa L Norman
- Lead Discovery and Rapid Structure Elucidation Group, Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive, St. Louis, Missouri 63114, United States
| | - Mark O'Neil-Johnson
- Lead Discovery and Rapid Structure Elucidation Group, Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive, St. Louis, Missouri 63114, United States
| | - Gary R Eldridge
- Lead Discovery and Rapid Structure Elucidation Group, Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive, St. Louis, Missouri 63114, United States
| | - Courtney M Starks
- Lead Discovery and Rapid Structure Elucidation Group, Sequoia Sciences, Inc. , 1912 Innerbelt Business Center Drive, St. Louis, Missouri 63114, United States
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Asymmetric glycolate alkylation approach towards total synthesis of 8-O.6′ and 8-O.4′-neolignans. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.11.087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Liu Y, Young K, Rakotondraibe LH, Brodie PJ, Wiley JD, Cassera M, Callmander MW, Rakotondrajaona R, Rakotobe E, Rasamison VE, TenDyke K, Shen Y, Kingston DGI. Antiproliferative Compounds from Cleistanthus boivinianus from the Madagascar Dry Forest. JOURNAL OF NATURAL PRODUCTS 2015; 78:1543-1547. [PMID: 26091020 PMCID: PMC4517784 DOI: 10.1021/np501020m] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Indexed: 06/04/2023]
Abstract
The two new lignans 3α-O-(β-D-glucopyranosyl)desoxypodophyllotoxin (1) and 4-O-(β-D-glucopyranosyl)dehydropodophyllotoxin (2) were isolated from Cleistanthus boivinianus, together with the known lignans deoxypicropodophyllotoxin (3), (±)-β-apopicropodophyllin (4), (-)-desoxypodophyllotoxin (5), (-)-yatein (6), and β-peltatin-5-O-β-D-glucopyranoside (7). The structures of all compounds were characterized by spectroscopic techniques. Compounds 1, 4, and 5 showed potent antiproliferative activities against the A2780 ovarian cancer cell line, with IC50 values of 33.0 ± 3.6, 63.1 ± 6.7, and 230 ± 1 nM, respectively. Compounds 2 and 7 showed only modest A2780 activities, with IC50 values of 2.1 ± 0.3 and 4.9 ± 0.1 μM, respectively, while compounds 3 and 6 had IC50 values of >10 μM. Compound 1 also had potent antiproliferative activity against the HCT-116 human colon carcinoma cell line, with an IC50 value of 20.5 nM, and compound 4 exhibited modest antiproliferative activity against the A2058 human caucasian metastatic melanoma and MES-SA human uterine sarcoma cell lines, with IC50 values of 4.6 and 4.0 μM, respectively.
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Affiliation(s)
- Yixi Liu
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Kelly Young
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - L. Harinantenaina Rakotondraibe
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Peggy J. Brodie
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Jessica D. Wiley
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Maria
B. Cassera
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Martin W. Callmander
- Missouri
Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166, United States
| | - R. Rakotondrajaona
- Centre
National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre
National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre
National d’Application des Recherches Pharmaceutiques, B.P. 702, Antananarivo 101, Madagascar
| | - Karen TenDyke
- Eisai Inc., 4 Corporate
Drive, Andover, Massachusetts 01810, United States
| | - Yongchun Shen
- Eisai Inc., 4 Corporate
Drive, Andover, Massachusetts 01810, United States
| | - David G. I. Kingston
- Department of Chemistry and the
Virginia Tech Center for Drug Discovery and Department of
Biochemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
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Eaton AL, Brodie PJ, Callmander MW, Rakotondrajaona R, Rakotobe E, Rasamison VE, Kingston DGI. Bioactive Oleanane Glycosides from Polyscias duplicata from the Madagascar Dry Forest [1]. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
As part of the International Cooperative Biodiversity Group (ICBG) program, in a search for antiproliferative compounds, an ethanol extract of Polyscias duplicata was investigated due to its antiproliferative activity against the A2780 human ovarian cell cancer line (IC50 6 μg/mL). Seven known oleanane glycosides, 3β-[(α-L-arabinopyranosyl)oxy]-16α-hydroxyolean-12-en-28-oic acid (1, IC50 8 μM), 3β-[(α-L-arabinopyranosyl)oxy]-16α,23-dihydroxyolean-12-en-18-oic acid (2, IC50 13 μM), 3β-[( O-β-D-glucopyranosyl-(1→3)-α-L-arabinopyranosyl)oxy]–16α-hydroxyolean-12-en-28-oic acid (3, IC50 7 μM), 3β-[( O-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl)oxy]-16α-hydroxyolean-12-en-28-oic acid (4, IC50 2.8 μM), 3β-[( O-β-D-glucopyranosyl-(1→3)-α-L-arabinopyranosyl)oxy]–23-hydroxyolean-12-en-28-oic acid (5, IC50 10 μM), 3β-[( O-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl)oxy]-23-hydroxyolean-12-en-28-oic acid (6, IC50 3.4 μM), and 3β-[(α-L-arabinopyranosyl)oxy]-23-hydroxyolean-12-en-28-oic acid (7, IC50 3.4 μM) were isolated, and their structures determined using spectroscopic methods.
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Affiliation(s)
- Alexander L. Eaton
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Peggy J. Brodie
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
| | | | - Roland Rakotondrajaona
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Etienne Rakotobe
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - Vincent E. Rasamison
- Centre National d'Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar
| | - David G. I. Kingston
- Department of Chemistry and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, USA
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