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Yu ZX, Song XM, Li MY, Zhang MM, Huang LZ, Li XB. New (4 → 2)-abeo-clerodane diterpenoids from the Polyalthia laui and their chemotaxonomic significance. BIOCHEM SYST ECOL 2023. [DOI: 10.1016/j.bse.2022.104550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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2
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Yu Z, Song X, Yao Y, Yang J, Yang S, Li X. Anti-inflammatory Clerodane Diterpenoids from Polyalthia longifolia. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202208019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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3
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Li F, Renata H. A Chiral-Pool-Based Strategy to Access trans-syn-Fused Drimane Meroterpenoids: Chemoenzymatic Total Syntheses of Polysin, N-Acetyl-polyveoline and the Chrodrimanins. J Am Chem Soc 2021; 143:18280-18286. [PMID: 34670085 DOI: 10.1021/jacs.1c08696] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
trans-syn-Fused drimane meroterpenoids are unique natural products that arise from contra-thermodynamic polycyclizations of their polyene precursors. Herein we report the first total syntheses of four trans-syn-fused drimane meroterpenoids, namely polysin, N-acetyl-polyveoline, chrodrimanin C, and verruculide A, in 7-18 steps from sclareolide. The trans-syn-fused drimane unit is accessed through an efficient acid-mediated C9 epimerization of sclareolide. Subsequent applications of enzymatic C-H oxidation and contemporary annulation methodologies install the requisite C3 hydroxyl group and enable rapid generation of structural complexity to provide concise access to these natural products.
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Affiliation(s)
- Fuzhuo Li
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
| | - Hans Renata
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
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Huck CJ, Boyko YD, Sarlah D. Total Synthesis of Stelletins through an Unconventional Annulation Strategy. Acc Chem Res 2021; 54:1597-1609. [PMID: 33635622 DOI: 10.1021/acs.accounts.0c00840] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Marine ecosystems present the largest source of biodiversity on the planet and an immense reservoir of novel chemical entities. Sessile marine organisms such as sponges produce a wide range of complex secondary metabolites, many of these with potent biological activity engineered for chemical defense. That such compounds exert dynamic effects outside of their native context is perhaps not surprising, and the realm of marine natural products has attracted considerable attention as a largely untapped repository of potential candidates for drug development. Only a handful of the more than 15 000 marine natural products that have been isolated to date have advanced to the clinic, and more are to be expected. The rich chemical information encoded in the intricate three-dimensional structures of many marine natural products facilitates highly discriminating interactions with cell signaling pathways, and especially within cancer cells such nuanced effects offer an exciting opportunity for the development of targeted therapies that lack the side effects and general toxicity of conventional chemotherapeutics. The isomalabaricanes are a rare class of marine triterpenoids that have been hailed as promising cytotoxic lead compounds for the treatment of cancer, and they have attracted a flurry of excitement from researchers because of their potent cytotoxicity in certain human cancer cell lines along with a range of other antineoplastic effects. Most notably, their inhibitory activity is highly cell-selective, characterized by large deviations from their mean GI50 concentrations across 3 orders of magnitude in the NCI-60 Human Tumor Cell Lines screen, suggesting mechanistic specificity rather than general and unbridled toxicity. Despite these auspicious preliminary reports, the isomalabaricane scaffold remains largely unexplored as a potential anticancer lead because of lack of material. This Account describes our recent efforts to develop a general, modular synthesis of the isomalabaricanes, as exemplified by the successful total syntheses of rhabdastrellic acid A, stelletin E, and stelletin A. The unorthodox trans-syn-trans configuration of their perhydrobenz[e]indene core severely circumscribes the synthetic methods available for its construction and required several generations of strategy to assemble. Ultimately, a series of unconventional transformations were identified that were capable of building this highly strained motif, and the syntheses of rhabdastrellic acid A and stelletin E were completed in racemic fashion. Subsequently, a second-generation approach to these natural products was developed, rendering the synthesis enantioselective as well as providing access to stelletin A. These synthetic efforts were greatly assisted by computational techniques such as 13C NMR prediction, which enabled structural assignments of hydrocarbon diastereomers, as well as relaxed surface scan conformational analysis, which informed a campaign for directed hydrogenation of an alkene. High-throughput experimentation methods were brought to bear during optimization of a late-stage Suzuki coupling on stelletin A. Finally, preliminary structure-activity relationship studies in glioblastoma and nonsmall cell lung cancer cell lines were conducted on stelletin A, revealing that the singular trans-syn-trans perhydrobenz[e]indene core is essential for the cytotoxic activity of the isomalabaricane triterpenoids.
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Affiliation(s)
- Christopher J. Huck
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Yaroslav D. Boyko
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - David Sarlah
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
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Mouafon IL, Tiani GLM, Mountessou BYG, Lateef M, Ali MS, Green IR, Ngadjui BT, Kouam SF. Chemical constituents of the medicinal plant Indigofera spicata Forsk (Fabaceae) and their chemophenetic significance. BIOCHEM SYST ECOL 2021. [DOI: 10.1016/j.bse.2021.104230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kemgni MF, Chenda LBN, Tchamgoue J, Kenfack PT, Ngandjui YAT, Wouamba SCN, Tiani GLM, Green IR, Kouam SF. Greenwaylactams A, B and C, the First Group of Sesquiterpene Alkaloids with an Eight‐Membered Lactam Ring from
Greenwayodendron oliveri. ChemistrySelect 2021. [DOI: 10.1002/slct.202004487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mireille F. Kemgni
- Department of Chemistry Higher Teacher Training College University of Yaounde I P.O. Box 47 Yaounde Cameroon
| | - Laurice Bracine N. Chenda
- Department of Chemistry Higher Teacher Training College University of Yaounde I P.O. Box 47 Yaounde Cameroon
| | - Joseph Tchamgoue
- Department of Organic Chemistry Faculty of Science University of Yaounde I P.O. Box 812 Yaounde Cameroon
| | - Patrice T. Kenfack
- Department of Chemistry Faculty of Science University of Dschang P.O. Box 67 Yaounde Cameroon
| | - Yvan Anderson T. Ngandjui
- Department of Chemistry Higher Teacher Training College University of Yaounde I P.O. Box 47 Yaounde Cameroon
| | - Steven C. N. Wouamba
- Department of Chemistry Higher Teacher Training College University of Yaounde I P.O. Box 47 Yaounde Cameroon
| | - Gesquière Laure M. Tiani
- Division of Wood Chemistry University Institute for Wood Technology Mbalmayo P.O. Box 306 Mbalmayo Cameroon
| | - Ivan R. Green
- Department of Chemistry and Polymer Science University of Stellenbosch P/Bag X1, Matieland Stellenbosch 7602 South Africa
| | - Simeon F. Kouam
- Department of Chemistry Higher Teacher Training College University of Yaounde I P.O. Box 47 Yaounde Cameroon
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Bekono BD, Ntie-Kang F, Onguéné PA, Lifongo LL, Sippl W, Fester K, Owono LCO. The potential of anti-malarial compounds derived from African medicinal plants: a review of pharmacological evaluations from 2013 to 2019. Malar J 2020; 19:183. [PMID: 32423415 PMCID: PMC7236213 DOI: 10.1186/s12936-020-03231-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 04/08/2020] [Indexed: 02/07/2023] Open
Abstract
Background African Traditional Medicine (ATM) is used for the healthcare of about 80% of the rural populations of the continent of Africa. The practices of ATM make use of plant-products, which are known to contain plant-based secondary metabolites or natural products (NPs), likely to play key roles in drug discovery, particularly as lead compounds. For various reasons, including resistance of strains of Plasmodium to known anti-malarial drugs, local African populations often resort to plant-based treatments and/or a combination of this and standard anti-malarial regimens. Emphasis has been laid in this review to present the anti-malarial virtue of the most recently published phytochemicals or natural products, which have been tested by in vitro and in vivo assays. Methods The data was based on the current version of the African Compound Libraries, which are constantly being updated based on inputs from journal articles and student theses (M.Sc/Ph.D) from African University libraries. Emphasis was laid on data published after 2012. In order to carry out the original data collection, currently being included in the African Compounds Database, individual journal websites were queried using the country names in Africa as search terms. Over 40,000 articles “hits” were originally retrieved, then reduced to about 9000 articles. The retained articles/theses was further queried with the search terms “malaria”, “malarial”, “plasmodium”, “plasmodial” and a combination of them, resulting in over 500 articles. Those including compounds with anti-malarial activities for which the measured activities fell within the established cut off values numbered 55, which were all cited in the review as relevant references. Results and discussion Pure compounds derived from African medicinal plants with demonstrated anti-malarial/antiplasmodial properties with activities ranging from “very active” to “weakly active” have been discussed. The majority of the 187 natural products were terpenoids (30%), followed by flavonoids (22%), alkaloids (19%) and quinones (15%), with each of the other compound classes being less than 5% of the entire compound collection. It was also observed that most of the plant species from which the compounds were identified were of the families Rubiaceae, Meliaceae and Asphodelaceae. The review is intended to continue laying the groundwork for an African-based anti-malarial drug discovery project.
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Affiliation(s)
- Boris D Bekono
- Department of Physics, Ecole Normale Supérieure, University of Yaoundé I, P. O. Box 47, Yaoundé, Cameroon
| | - Fidele Ntie-Kang
- Department of Chemistry, Faculty of Science, University of Buea, P. O. Box 63, Buea, Cameroon. .,Department of Pharmaceutical Chemistry, Martin-Luther University of Halle-Wittenberg, Kurt-Mothes Str. 3, 06120, Halle (Saale), Germany. .,Institut für Botanik, Technische Universität Dresden, Zellescher Weg 20b, 01062 , Dresden, Germany.
| | - Pascal Amoa Onguéné
- Department of Chemistry, University Institute of Wood Technology Mbalmayo, University of Yaoundé I, BP 50, Mbalmayo, Cameroon
| | - Lydia L Lifongo
- Department of Chemistry, Faculty of Science, University of Buea, P. O. Box 63, Buea, Cameroon
| | - Wolfgang Sippl
- Department of Pharmaceutical Chemistry, Martin-Luther University of Halle-Wittenberg, Kurt-Mothes Str. 3, 06120, Halle (Saale), Germany
| | - Karin Fester
- Faculty of Natural and Environmental Sciences, Zittau/Görlitz University of Applied Sciences, Theodor-Körner-Allee 16, 02763, Zittau, Germany
| | - Luc C O Owono
- Department of Physics, Ecole Normale Supérieure, University of Yaoundé I, P. O. Box 47, Yaoundé, Cameroon.
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Alkaloids from Plants with Antimalarial Activity: A Review of Recent Studies. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:8749083. [PMID: 32104196 PMCID: PMC7037883 DOI: 10.1155/2020/8749083] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 01/04/2020] [Accepted: 01/21/2020] [Indexed: 11/17/2022]
Abstract
Malaria is one of the major health problems in developing countries. The disease kills a large number of people every year and also affects financial status of many countries. Resistance of the plasmodium parasite, the causative agent, to the existing drugs, including chloroquine, mefloquine, and artemisinin based combination therapy (ACT), is a serious global issue in malaria treatment and control. This warrants an urgent quest for novel compounds, particularly from natural sources such as medicinal plants. Alkaloids have over the years been recognized as important phytoconstituents with interesting biological properties. In fact, the first successful antimalarial drug was quinine, an alkaloid, which was extracted from Cinchona tree. In the present review work, the alkaloids isolated and reported recently (2013 till 2019) to possess antimalarial activity are presented. Several classes of alkaloids, including terpenoidal, indole, bisindole, quinolone, and isoquinoline alkaloids, were identified with a promising antimalarial activity. It is hoped that the reports of the review work will spur further research into the structural modification and/or development of the interesting compounds as novel antimalarial drugs.
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Ngouonpe AW, Mbobda ASW, Happi GM, Mbiantcha M, Tatuedom OK, Ali MS, Lateef M, Tchouankeu JC, Kouam SF. Natural products from the medicinal plant Duguetia staudtii (Annonaceae). BIOCHEM SYST ECOL 2019. [DOI: 10.1016/j.bse.2018.12.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Bock J, Daniliuc CG, Hennecke U. Stable Bromiranium Ion Salts as Reagents for Biomimetic Indole Terpenoid Cyclizations. Org Lett 2019; 21:1704-1707. [DOI: 10.1021/acs.orglett.9b00259] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jonathan Bock
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Correnssstrasse 40, 48149 Münster, Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Correnssstrasse 40, 48149 Münster, Germany
| | - Ulrich Hennecke
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Correnssstrasse 40, 48149 Münster, Germany
- Organic Chemistry Research Group, Departments of Chemistry and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium
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11
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Yu ZX, Zheng CJ, Chen GY, Huang RL, Zhou XM, Niu ZG, Li XB, Han CR, Song XP. 3,4- seco-Norclerodane Diterpenoids from the Roots of Polyalthia laui. JOURNAL OF NATURAL PRODUCTS 2019; 82:27-34. [PMID: 30596489 DOI: 10.1021/acs.jnatprod.8b00243] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Ten new clerodane diterpenoids, polylauioids A-J (1-10), and five known analogues (11-15) were isolated from the roots of Polyalthia laui. Among the new compounds, 3 and 8 are artifacts. The structures were elucidated using spectroscopic methods and by comparison with published NMR spectroscopic data. The absolute configurations of 4, 5, and 7 were defined based on single-crystal X-ray diffraction and electronic circular dichroism data. Compounds 1 and 2 represent the first examples of rearranged 3,4- seco-norclerodane diterpenoids, and a putative biosynthesis pathway for these compounds is proposed. Compounds 1, 4, 6, 7, 9, and 10 showed anti-HIV activities with EC50 values ranging from 12.2 to 35.2 μM.
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Affiliation(s)
- Zhang-Xin Yu
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education , Hainan Normal University , Haikou 571158 , People's Republic of China
- Hainan Branch of the Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences and Peking Union Medical College , Haikou 570311 , People's Republic of China
| | - Cai-Juan Zheng
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education , Hainan Normal University , Haikou 571158 , People's Republic of China
| | - Guang-Ying Chen
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education , Hainan Normal University , Haikou 571158 , People's Republic of China
| | - Rong-Li Huang
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education , Hainan Normal University , Haikou 571158 , People's Republic of China
| | - Xue-Ming Zhou
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education , Hainan Normal University , Haikou 571158 , People's Republic of China
| | - Zhi-Gang Niu
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education , Hainan Normal University , Haikou 571158 , People's Republic of China
| | - Xiao-Bao Li
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education , Hainan Normal University , Haikou 571158 , People's Republic of China
| | - Chang-Ri Han
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education , Hainan Normal University , Haikou 571158 , People's Republic of China
- Key Laboratory of Medicinal and Edible Plant Resources of Hainan Province , Hainan Institute of Science and Technology , Haikou 571126 , People's Republic of China
| | - Xiao-Ping Song
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education , Hainan Normal University , Haikou 571158 , People's Republic of China
- Key Laboratory of Medicinal and Edible Plant Resources of Hainan Province , Hainan Institute of Science and Technology , Haikou 571126 , People's Republic of China
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Zhou M, Zhou J, Liu J, Liang JJ, Peng XG, Duan FF, Ruan HL. Parasubindoles A-G, Seven Eremophilanyl Indoles from the Whole Plant of Parasenecio albus. J Org Chem 2018; 83:12122-12128. [PMID: 30198718 DOI: 10.1021/acs.joc.8b02089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Parasubindoles A-G (1-7), seven eremophilanyl indoles with an unprecedented 12 H-cyclopentane[ b]naphthalenespiro-1,3'-indole skeleton, were isolated from the whole plant of Parasenecio albus. Their structures with absolute configurations were elucidated by spectroscopic methods, single-crystal X-ray diffraction, and ECD analyses. Plausible biosynthetic pathways of 1-7 were postulated.
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Affiliation(s)
- Ming Zhou
- School of Pharmacy, Tongji Medical College, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation , Huazhong University of Science and Technology , Wuhan 430030 , P. R. China
| | - Jia Zhou
- School of Pharmacy, Tongji Medical College, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation , Huazhong University of Science and Technology , Wuhan 430030 , P. R. China
| | - Junjun Liu
- School of Pharmacy, Tongji Medical College, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation , Huazhong University of Science and Technology , Wuhan 430030 , P. R. China
| | - Jing-Jing Liang
- School of Pharmacy, Tongji Medical College, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation , Huazhong University of Science and Technology , Wuhan 430030 , P. R. China
| | - Xiao-Gang Peng
- School of Pharmacy, Tongji Medical College, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation , Huazhong University of Science and Technology , Wuhan 430030 , P. R. China
| | - Fang-Fang Duan
- School of Pharmacy, Tongji Medical College, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation , Huazhong University of Science and Technology , Wuhan 430030 , P. R. China
| | - Han-Li Ruan
- School of Pharmacy, Tongji Medical College, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation , Huazhong University of Science and Technology , Wuhan 430030 , P. R. China
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Vivekanand T, Satpathi B, Bankar SK, Ramasastry SSV. Recent metal-catalysed approaches for the synthesis of cyclopenta[ b]indoles. RSC Adv 2018; 8:18576-18588. [PMID: 35541103 PMCID: PMC9080641 DOI: 10.1039/c8ra03480j] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 05/14/2018] [Indexed: 12/15/2022] Open
Abstract
The cyclopenta[b]indole scaffold is ubiquitously present in several bioactive natural products and pharmaceutically interesting compounds. Of the numerous methods known for the synthesis of cyclopenta-fused indoles, this review highlights only the metal-catalysed approaches reported from the year 2015 onwards. This review encompasses our own efforts leading to the synthesis of cyclopentannulated indoles, in addition to the seminal contributions of several other researchers.
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Affiliation(s)
- Thavaraj Vivekanand
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, S. A. S. Nagar Manauli PO Punjab 140306 India http://14.139.227.202/faculty/sastry/
| | - Bishnupada Satpathi
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, S. A. S. Nagar Manauli PO Punjab 140306 India http://14.139.227.202/faculty/sastry/
| | - Siddheshwar K Bankar
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, S. A. S. Nagar Manauli PO Punjab 140306 India http://14.139.227.202/faculty/sastry/
| | - S S V Ramasastry
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, S. A. S. Nagar Manauli PO Punjab 140306 India http://14.139.227.202/faculty/sastry/
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Attiq A, Jalil J, Husain K. Annonaceae: Breaking the Wall of Inflammation. Front Pharmacol 2017; 8:752. [PMID: 29104539 PMCID: PMC5654839 DOI: 10.3389/fphar.2017.00752] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 10/03/2017] [Indexed: 12/12/2022] Open
Abstract
Inventories of tropical forests have listed Annonaceae as one of the most diverse plant families. For centuries, it is employed in traditional medicines to cure various pathological conditions including snakebite, analgesic, astringent, diarrhea, dysentery, arthritis pain, rheumatism, neuralgia, and weight loss etc. Phytochemical analysis of Annonaceae family have reported the occurrence of alkaloids, flavonoids, triterpenes, diterpenes and diterpene flavone glycosides, sterols, lignans, and annonaceous acetogenin characteristically affiliated with Annonaceae sp. Numerous past studies have underlined the pleotropic pharmacological activities of the crude extracts and isolated compounds from Annonaceae species. This review is an effort to abridge the ethnobotany, morphology, phytochemistry, toxicity, and particularly focusing on the anti-inflammatory activity of the Annonaceae species.
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Affiliation(s)
- Ali Attiq
- Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Juriyati Jalil
- Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Khairana Husain
- Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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Shaaban M, Shaaban KA, Helmke E, Grün-Wollny I, Laatsch H. Isolation and Structural Elucidation of Nitrogenous Secondary Metabolites from Terrestrial and Marine Streptomyces spp. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Screening and chromatography of extracts from a terrestrial and a marine-derived streptomycete yielded two new nitrogenous benzene derivatives, namely ( S)- N-[3-hydroxy-1-(4-hydroxyphenyl)-propyl]-acetamide (1a), and ( R)-2-(1-methyl-2-oxopropylamino)-benzoic acid (2). Additionally, eight known compounds were isolated, 2-acetamidophenol, phenazine-1-carboxylic acid, phenazine-1-carboxylic acid methyl ester, perlolyrin, tyrosol, uracil, and anthranilic acid. The structures of the new compounds were deduced from high resolution mass, 1D and 2D NMR spectra and by comparison with related compounds from the literature. The absolute configuration of 1a and 2 was determined by comparison of experimental and calculated CD and ORD data.
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Affiliation(s)
- Mohamed Shaaban
- Institute of Organic and Biomolecular Chemistry, University of Göttingen, Tammannstraβe 2, D-37077 Göttingen, Germany
| | - Khaled A. Shaaban
- Institute of Organic and Biomolecular Chemistry, University of Göttingen, Tammannstraβe 2, D-37077 Göttingen, Germany
| | - Elisabeth Helmke
- Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany
| | | | - Hartmut Laatsch
- Institute of Organic and Biomolecular Chemistry, University of Göttingen, Tammannstraβe 2, D-37077 Göttingen, Germany
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Ouattara ZA, Boti JB, Ahibo CA, Bekro YA, Casanova J, Tomi F, Bighelli A. Composition and Chemical Variability of Ivoirian Polyalthia oliveri Leaf Oil. Chem Biodivers 2016; 13:293-298. [PMID: 26916629 DOI: 10.1002/cbdv.201500066] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 05/29/2015] [Indexed: 11/06/2022]
Abstract
The chemical composition of 45 essential oil samples isolated from the leaves of Polyalthia oliveri harvested in three Ivoirian forests was investigated by GC-FID (retention indices measured on two columns of different polarities), and by (13) C-NMR, following a method developed in our laboratory. In total, 41 components were identified. The content of the main components varied drastically from sample to sample: (E)-β-caryophyllene (1.2 - 50.8%), α-humulene (0.6 - 47.7%), isoguaiene (0 - 27.9%), alloaromadendrene (0 - 24.7%), germacrene B (0 - 18.3%), δ-cadinene (0.4 - 19.3%), and β-selinene (0.2 - 18.5%). The analysis of six oil samples selected in function of their chromatographic profiles is reported in detail. The 45 oil compositions were submitted to hierarchical cluster and principal components analysis, which allowed the distinction of three groups within the oil samples. The compositions of the oils from group I (15 samples) and II (12 samples) were dominated by (E)-β-caryophyllene and α-humulene, respectively. Oil samples of group III (18 samples) needed to be partitioned into four subgroups III.1-III.4 whose compositions were dominated by alloaromadenrene, isoguaiene, germacrene B, and δ-cadinene, respectively.
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Affiliation(s)
- Zana A Ouattara
- Université de Corse-CNRS, UMR 6134 SPE, Equipe Chimie et Biomasse, Route des Sanguinaires, FR-20000, Ajaccio, France.,Laboratoire de Chimie Organique Biologique, UFR-SSMT, Université Félix Houphouët-Boigny, BPV 34, Abidjan, Côte d'Ivoire
| | - Jean Brice Boti
- Laboratoire de Chimie Organique Biologique, UFR-SSMT, Université Félix Houphouët-Boigny, BPV 34, Abidjan, Côte d'Ivoire
| | - Coffy Antoine Ahibo
- Laboratoire de Chimie Organique Biologique, UFR-SSMT, Université Félix Houphouët-Boigny, BPV 34, Abidjan, Côte d'Ivoire
| | - Yves-Alain Bekro
- Laboratoire de Chimie Bio-Organique et des Substances Naturelles, UFR SFA, Université Nangui Abrogoua, 02 BP 801, Abidjan 01, Côte d'Ivoire
| | - Joseph Casanova
- Université de Corse-CNRS, UMR 6134 SPE, Equipe Chimie et Biomasse, Route des Sanguinaires, FR-20000, Ajaccio, France
| | - Félix Tomi
- Université de Corse-CNRS, UMR 6134 SPE, Equipe Chimie et Biomasse, Route des Sanguinaires, FR-20000, Ajaccio, France
| | - Ange Bighelli
- Université de Corse-CNRS, UMR 6134 SPE, Equipe Chimie et Biomasse, Route des Sanguinaires, FR-20000, Ajaccio, France
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Muganza DM, Fruth B, Nzunzu JL, Tuenter E, Foubert K, Cos P, Maes L, Kanyanga RC, Exarchou V, Apers S, Pieters L. In vitro antiprotozoal activity and cytotoxicity of extracts and isolated constituents from Greenwayodendron suaveolens. JOURNAL OF ETHNOPHARMACOLOGY 2016; 193:510-516. [PMID: 27693770 DOI: 10.1016/j.jep.2016.09.051] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 09/27/2016] [Accepted: 09/28/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The Nkundo people (Nkundo area of Bolongo, Mai-Ndombe district, Bandundu Province, DR Congo) use various plant parts of the tree Greenwayodendron suaveolens (Engl. & Diels) Verdc. (syn. Polyalthia suaveolens Engl. & Diels) (Annonaceae) against malaria, but its antiprotozoal constituents are not known. MATERIALS AND METHODS The crude 80% ethanol extract from the fruits, leaves, root bark and stem bark and 16 fractions were assessed in vitro for their antiprotozoal activity against Trypanosoma brucei brucei, T. cruzi, Leishmania infantum and the chloroquine and pyrimethamine-resistant K1 strain of Plasmodium falciparum (Pf-K1). Their cytotoxic effects were evaluated against MRC-5 cells. Active constituents were isolated by chromatographic means, identified using spectroscopic methods, and evaluated in the same assays. RESULTS The root bark extract showed the highest activity against P. falciparum K1 (IC50 0.26µg/mL) along with the stem bark alkaloid fraction (IC50 0.27µg/mL). The root bark alkaloid fraction had a pronounced activity against all selected protozoa with IC50 values <1µg/mL. The 90% methanol fractions of the different plant parts showed a pronounced activity against P. falciparum K1, with IC50 values ranging between 0.36µg/mL and 0.69µg/mL. Four constituents were isolated: the triterpenes polycarpol, and dihydropolycarpol, the latter one being reported for the first time from nature, and the alkaloids polyalthenol and N-acetyl-polyveoline. They were active to a various degree against one or more protozoa, mostly accompanied by cytotoxicity. The highest selectivity was observed for N-acetyl-polyveoline against P. falciparum K1 (IC50 2.8µM, selectivity index 10.9). CONCLUSIONS These results may explain at least in part the traditional use of this plant species against parasitic diseases such as malaria in DR Congo.
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Affiliation(s)
- D Musuyu Muganza
- Faculty of Pharmaceutical Sciences, University of Kinshasa, P.O. Box 212, Kinshasa XI, Democratic Republic of Congo.
| | - B Fruth
- Ludwig Maximilian University of Munich, Faculty of Biology/ Department Biology II, Großhaderner Straße 2, D-82152 Planegg-Martinsried, Germany; Centre for Research and Conservation / KMDA, Koningin Astridplein 20-26, B-2018 Antwerp, Belgium
| | - J Lami Nzunzu
- Faculty of Pharmaceutical Sciences, University of Kinshasa, P.O. Box 212, Kinshasa XI, Democratic Republic of Congo
| | - E Tuenter
- Natural Products & Food Resarch and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
| | - K Foubert
- Natural Products & Food Resarch and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
| | - P Cos
- Laboratory of Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
| | - L Maes
- Laboratory of Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
| | - R Cimanga Kanyanga
- Faculty of Pharmaceutical Sciences, University of Kinshasa, P.O. Box 212, Kinshasa XI, Democratic Republic of Congo; Natural Products & Food Resarch and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
| | - V Exarchou
- Natural Products & Food Resarch and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
| | - S Apers
- Natural Products & Food Resarch and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
| | - L Pieters
- Natural Products & Food Resarch and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
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Dhiman S, Ramasastry SSV. One-Pot Relay Gold(I) and Brønsted Acid Catalysis: Cyclopenta[b]annulation of Indoles via Hydroamination/Nazarov-Type Cyclization Cascade of Enynols. Org Lett 2015; 17:5116-9. [DOI: 10.1021/acs.orglett.5b02632] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Seema Dhiman
- Organic Synthesis and Catalysis
Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, S. A. S. Nagar, Manuali PO, Punjab 140306, India
| | - S. S. V. Ramasastry
- Organic Synthesis and Catalysis
Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, S. A. S. Nagar, Manuali PO, Punjab 140306, India
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Li G, Kusari S, Lamshöft M, Schüffler A, Laatsch H, Spiteller M. Antibacterial secondary metabolites from an endophytic fungus, Eupenicillium sp. LG41. JOURNAL OF NATURAL PRODUCTS 2014; 77:2335-41. [PMID: 25356913 DOI: 10.1021/np500111w] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Two new compounds containing the decalin moiety, eupenicinicols A and B (1 and 2), two new sirenin derivatives, eupenicisirenins A and B (3 and 4), and four known compounds, (2S)-butylitaconic acid (5), (2S)-hexylitaconic acid (6), xanthomegnin (7), and viridicatumtoxin (8), were isolated from an endophytic fungus, Eupenicillium sp. LG41, harbored in the roots of the Chinese medicinal plant Xanthium sibiricum. Their structures were confirmed through combined spectroscopic analysis (NMR and HRMS(n)), and their absolute configurations were deduced by ECD calculations or optical rotation data. Since the endophytic fungus was isolated from the roots, the antibacterial efficacies of the compounds 1-6 were investigated against Bacillus subtilis and Acinetobacter sp. BD4, which typically inhabit soil, as well as the clinically important Staphylococcus aureus and Escherichia coli. (2S)-Butylitaconic acid (5) and (2S)-hexylitaconic acid (6) exhibited pronounced efficacy against Acinetobacter sp., corroborating the notion that root-endophytes provide chemical defense to the host plants. Compound 2 was highly active against the clinically relevant S. aureus. By comparing 1 with 2, it was revealed that altering the substitution at C-11 could drastically increase the antibacterial efficacy of 1. Our study reveals plausible ecological roles of the endophyte and its potential pharmaceutical use as a source of antibacterial compounds.
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Affiliation(s)
- Gang Li
- Institute of Environmental Research (INFU), Department of Chemistry and Chemical Biology, Chair of Environmental Chemistry and Analytical Chemistry, TU Dortmund , Otto-Hahn-Straße 6, D-44221 Dortmund, Germany
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