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Rosales Martínez A, Rodríguez-Maecker RN, Rodríguez-García I. Unifying the Synthesis of a Whole Family of Marine Meroterpenoids through a Biosynthetically Inspired Sequence of 1,2-Hydride and Methyl Shifts as Key Step. Mar Drugs 2023; 21:md21020118. [PMID: 36827159 PMCID: PMC9962294 DOI: 10.3390/md21020118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/15/2023] Open
Abstract
Marine meroterpenoids have attracted a great deal of attention from synthetic research groups due to their attractive and varied biological activities and their unique and diverse structures. In most cases, however, further biological studies have been severely limited mainly to the scarcity of natural supply and because almost none of the reported syntheses methods has enabled unified access for a large number of marine meroterpenoids with aureane and avarane skeletons. Based on our previous publications and the study of recent manuscripts on marine meroterpenoids, we have conceived a unified strategy for these fascinating marine compounds with aureane or avarane skeletons using available drimane compounds as starting materials. The key step is a biosynthetic sequence of 1,2-hydride and methyl shifts. This strategy is of great synthetic value to access marine meroterpenoids through easy chemical synthetic procedures. Finally, several retrosynthetic proposals are made for the future synthesis of several members of this class of meroterpenoids, focused on consolidating these 1,2-rearrangements as a versatile and unified strategy that could be widely used in the preparation of these marine meroterpenoids.
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Affiliation(s)
- Antonio Rosales Martínez
- Department of Chemical Engineering, Escuela Politécnica Superior, University of Sevilla, 41011 Sevilla, Spain
- Correspondence:
| | - Román Nicolay Rodríguez-Maecker
- Department of Energy and Mechanics, Carrera de Ingeniería Petroquímica, Universidad de las Fuerzas Armadas-ESPE, Latacunga 050150, Ecuador
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2
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Cheng YF, Li HJ, Wu YC. Total Synthesis of Marine Natural Products (+)-Strongylin A and Corallidictyal D by Regio- and Stereoselective Cyclization of Alkenyl Benzenes. J Org Chem 2022; 87:16767-16775. [PMID: 36442492 DOI: 10.1021/acs.joc.2c02440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An expeditious access to marine natural products (+)-strongylin A and corallidictyal D is described. A TFA/Et3SiH-induced reductive isomerization of enols I to alkenyl benzenes II followed by a selectivity-controlled cyclization in the presence of HCl and BF3·Et2O affords benzofuran III and benzopyran IV, respectively. The applicability of this HCl-induced cyclization is showcased by a regio- and stereoselective synthesis of corallidictyal D, while BF3·Et2O-promoted cyclization posterior to rearrangement of an alkenyl benzene provides a regioselectively different benzopyran, (+)-strongylin A.
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Affiliation(s)
- Yun-Fei Cheng
- Weihai Key Laboratory of Active Factor of Marine Products, Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of echnology, Weihai 264209, P. R. China
| | - Hui-Jing Li
- Weihai Key Laboratory of Active Factor of Marine Products, Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of echnology, Weihai 264209, P. R. China
| | - Yan-Chao Wu
- Weihai Key Laboratory of Active Factor of Marine Products, Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of echnology, Weihai 264209, P. R. China
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3
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Genus Smenospongia: Untapped Treasure of Biometabolites—Biosynthesis, Synthesis, and Bioactivities. Molecules 2022; 27:molecules27185969. [PMID: 36144705 PMCID: PMC9501515 DOI: 10.3390/molecules27185969] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/10/2022] [Accepted: 09/10/2022] [Indexed: 11/16/2022] Open
Abstract
Marine sponges continue to attract remarkable attention as one of the richest pools of bioactive metabolites in the marine environment. The genus Smenospongia (order Dictyoceratida, family Thorectidae) sponges can produce diverse classes of metabolites with unique and unusual chemical skeletons, including terpenoids (sesqui-, di-, and sesterterpenoids), indole alkaloids, aplysinopsins, bisspiroimidazolidinones, chromenes, γ-pyrones, phenyl alkenes, naphthoquinones, and polyketides that possessed diversified bioactivities. This review provided an overview of the reported metabolites from Smenospongia sponges, including their biosynthesis, synthesis, and bioactivities in the period from 1980 to June 2022. The structural characteristics and diverse bioactivities of these metabolites could attract a great deal of attention from natural-product chemists and pharmaceuticals seeking to develop these metabolites into medicine for the treatment and prevention of certain health concerns.
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Chhetri BK, Tedbury PR, Sweeney-Jones AM, Mani L, Soapi K, Manfredi C, Sorscher E, Sarafianos SG, Kubanek J. Marine Natural Products as Leads against SARS-CoV-2 Infection. JOURNAL OF NATURAL PRODUCTS 2022; 85:657-665. [PMID: 35290044 PMCID: PMC8936055 DOI: 10.1021/acs.jnatprod.2c00015] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Indexed: 05/13/2023]
Abstract
Since early 2020, disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has become a global pandemic, causing millions of infections and deaths worldwide. Despite rapid deployment of effective vaccines, it is apparent that the global community lacks multipronged interventions to combat viral infection and disease. A major limitation is the paucity of antiviral drug options representing diverse molecular scaffolds and mechanisms of action. Here we report the antiviral activities of three distinct marine natural products─homofascaplysin A (1), (+)-aureol (2), and bromophycolide A (3)─evidenced by their ability to inhibit SARS-CoV-2 replication at concentrations that are nontoxic toward human airway epithelial cells. These compounds stand as promising candidates for further exploration toward the discovery of novel drug leads against SARS-CoV-2.
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Affiliation(s)
- Bhuwan Khatri Chhetri
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Philip R. Tedbury
- Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | | | - Luke Mani
- Institute of Applied Sciences, University of South Pacific, Suva, Fiji
| | - Katy Soapi
- Institute of Applied Sciences, University of South Pacific, Suva, Fiji
| | - Candela Manfredi
- Department of Pediatrics, Division of Pulmonary Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Eric Sorscher
- Department of Pediatrics, Division of Pulmonary Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Stefan G. Sarafianos
- Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Julia Kubanek
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, GA 30332, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
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Sahoo A, Fuloria S, Swain SS, Panda SK, Sekar M, Subramaniyan V, Panda M, Jena AK, Sathasivam KV, Fuloria NK. Potential of Marine Terpenoids against SARS-CoV-2: An In Silico Drug Development Approach. Biomedicines 2021; 9:biomedicines9111505. [PMID: 34829734 PMCID: PMC8614725 DOI: 10.3390/biomedicines9111505] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/17/2021] [Accepted: 10/17/2021] [Indexed: 12/11/2022] Open
Abstract
In an emergency, drug repurposing is the best alternative option against newly emerged severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection. However, several bioactive natural products have shown potential against SARS-CoV-2 in recent studies. The present study selected sixty-eight broad-spectrum antiviral marine terpenoids and performed molecular docking against two novel SARS-CoV-2 enzymes (main protease or Mpro or 3CLpro) and RNA-dependent RNA polymerase (RdRp). In addition, the present study analysed the physiochemical-toxicity-pharmacokinetic profile, structural activity relationship, and phylogenetic tree with various computational tools to select the 'lead' candidate. The genomic diversity study with multiple sequence analyses and phylogenetic tree confirmed that the newly emerged SARS-CoV-2 strain was up to 96% structurally similar to existing CoV-strains. Furthermore, the anti-SARS-CoV-2 potency based on a protein-ligand docking score (kcal/mol) exposed that the marine terpenoid brevione F (-8.4) and stachyflin (-8.4) exhibited similar activity with the reference antiviral drugs lopinavir (-8.4) and darunavir (-7.5) against the target SARS-CoV-Mpro. Similarly, marine terpenoids such as xiamycin (-9.3), thyrsiferol (-9.2), liouvilloside B (-8.9), liouvilloside A (-8.8), and stachyflin (-8.7) exhibited comparatively higher docking scores than the referral drug remdesivir (-7.4), and favipiravir (-5.7) against the target SARS-CoV-2-RdRp. The above in silico investigations concluded that stachyflin is the most 'lead' candidate with the most potential against SARS-CoV-2. Previously, stachyflin also exhibited potential activity against HSV-1 and CoV-A59 within IC50, 0.16-0.82 µM. Therefore, some additional pharmacological studies are needed to develop 'stachyflin' as a drug against SARS-CoV-2.
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Affiliation(s)
- Alaka Sahoo
- Department of Skin & VD, Institute of Medical Sciences and SUM Hospital, Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar 751003, Odisha, India; (A.S.); (M.P.); (A.K.J.)
| | - Shivkanya Fuloria
- Faculty of Pharmacy, Centre of Excellence for Biomaterials Engineering, AIMST University, Bedong 08100, Kedah, Malaysia
- Correspondence: (S.F.); (N.K.F.)
| | - Shasank S. Swain
- Division of Microbiology and NCDs, ICMR–Regional Medical Research Centre, Bhubaneswar 751023, Odisha, India;
| | - Sujogya K. Panda
- Center of Environment Climate Change and Public Health, Utkal University, Vani Vihar, Bhubaneswar 751004, Odisha, India;
| | - Mahendran Sekar
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Health Sciences, Universiti Kuala Lumpur Royal College of Medicine Perak, Ipoh 30450, Perak, Malaysia;
| | - Vetriselvan Subramaniyan
- Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jalan SP 2, Bandar Saujana Putra, Jenjarom 42610, Selangor, Malaysia;
| | - Maitreyee Panda
- Department of Skin & VD, Institute of Medical Sciences and SUM Hospital, Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar 751003, Odisha, India; (A.S.); (M.P.); (A.K.J.)
| | - Ajaya K. Jena
- Department of Skin & VD, Institute of Medical Sciences and SUM Hospital, Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar 751003, Odisha, India; (A.S.); (M.P.); (A.K.J.)
| | - Kathiresan V. Sathasivam
- Faculty of Applied Science, Centre of Excellence for Biomaterials Engineering, AIMST University, Bedong 08100, Kedah, Malaysia;
| | - Neeraj Kumar Fuloria
- Faculty of Pharmacy, Centre of Excellence for Biomaterials Engineering, AIMST University, Bedong 08100, Kedah, Malaysia
- Correspondence: (S.F.); (N.K.F.)
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Sun TT, Zhu HJ, Cao F. Marine Natural Products as a Source of Drug Leads against Respiratory Viruses: Structural and Bioactive Diversity. Curr Med Chem 2021; 28:3568-3594. [PMID: 33106135 DOI: 10.2174/0929867327666201026150105] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 11/22/2022]
Abstract
Respiratory viruses, including influenza virus, respiratory syncytial virus, coronavirus, etc., have seriously threatened the human health. For example, the outbreak of severe acute respiratory syndrome coronavirus, SARS, affected a large number of countries around the world. Marine organisms, which could produce secondary metabolites with novel structures and abundant biological activities, are an important source for seeking effective drugs against respiratory viruses. This report reviews marine natural products with activities against respiratory viruses, the emphasis of which was put on structures and antiviral activities of these natural products. This review has described 167 marinederived secondary metabolites with activities against respiratory viruses published from 1981 to 2019. Altogether 102 references are cited in this review article.
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Affiliation(s)
- Tian-Tian Sun
- College of Pharmaceutical Sciences, Institute of Life Science and Green Development, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, China
| | - Hua-Jie Zhu
- College of Pharmaceutical Sciences, Institute of Life Science and Green Development, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, China
| | - Fei Cao
- College of Pharmaceutical Sciences, Institute of Life Science and Green Development, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, China
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Rosales Martínez A, Rodríguez-García I, López-Martínez JL. Divergent Strategy in Marine Tetracyclic Meroterpenoids Synthesis. Mar Drugs 2021; 19:md19050273. [PMID: 34068313 PMCID: PMC8153347 DOI: 10.3390/md19050273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/22/2022] Open
Abstract
The divergent total synthesis strategy can be successfully applied to the preparation of families of natural products using a common late-stage pluripotent intermediate. This approach is a powerful tool in organic synthesis as it offers opportunities for the efficient preparation of structurally related compounds. This article reviews the synthesis of the marine natural product aureol, as well as its use as a common intermediate in the divergent synthesis of other marine natural and non-natural tetracyclic meroterpenoids.
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Affiliation(s)
- Antonio Rosales Martínez
- Department of Chemical Engineering, Escuela Politécnica Superior, University of Sevilla, 41011 Sevilla, Spain
- Correspondence:
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Lee YJ, Cho Y, Tran HNK. Secondary Metabolites from the Marine Sponges of the Genus Petrosia: A Literature Review of 43 Years of Research. Mar Drugs 2021; 19:md19030122. [PMID: 33668842 PMCID: PMC7996255 DOI: 10.3390/md19030122] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/21/2021] [Accepted: 02/22/2021] [Indexed: 12/21/2022] Open
Abstract
Sponges are prolific sources of various natural products that have provided the chemical scaffolds for new drugs. The sponges of the genus Petrosia inhabit various regions and contain a variety of biologically active natural products such as polyacetylenes, sterols, meroterpenoids, and alkaloids. This review aims to provide a comprehensive summary of the chemical structures and biological activities of Petrosia metabolites covering a period of more than four decades (between 1978 and 2020). It is also described in this review that the major groups of metabolites from members of the genus Petrosia differed with latitude. The polyacetylenes were identified to be the most predominant metabolites in Petrosia sponges in temperate regions, while tropical Petrosia species were sources of a greater variety of metabolites, such as meroterpenoids, sterols, polyacetylenes, and alkaloids.
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Affiliation(s)
- Yeon-Ju Lee
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, 385 Haeyangro, Busan 49111, Korea; (Y.C.); (H.N.K.T.)
- Department of Applied Ocean Science, University of Science and Technology, Daejeon 34113, Korea
- Correspondence: ; Tel.: +82-51-664-3350
| | - Yeonwoo Cho
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, 385 Haeyangro, Busan 49111, Korea; (Y.C.); (H.N.K.T.)
- Department of Applied Ocean Science, University of Science and Technology, Daejeon 34113, Korea
| | - Huynh Nguyen Khanh Tran
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, 385 Haeyangro, Busan 49111, Korea; (Y.C.); (H.N.K.T.)
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A Concise Route for the Synthesis of Tetracyclic Meroterpenoids: (±)-Aureol Preparation and Mechanistic Interpretation. Mar Drugs 2020; 18:md18090441. [PMID: 32858988 PMCID: PMC7551916 DOI: 10.3390/md18090441] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/23/2020] [Accepted: 08/25/2020] [Indexed: 11/17/2022] Open
Abstract
A new concise general methodology for the synthesis of different tetracyclic meroterpenoids is reported: (±)-aureol (1), the key intermediate of this general route. The synthesis of (±)-aureol (1) was achieved in seven steps (28% overall yield) from (±)-albicanol. The key steps of this route include a C-C bond-forming reaction between (±)-albicanal and a lithiated arene unit and a rearrangement involving 1,2-hydride and 1,2-methyl shifts promoted by BF3•Et2O as activator and water as initiator.
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A modular synthesis of tetracyclic meroterpenoid antibiotics. Nat Commun 2017; 8:2083. [PMID: 29234008 PMCID: PMC5727219 DOI: 10.1038/s41467-017-02061-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 11/02/2017] [Indexed: 11/08/2022] Open
Abstract
Stachyflin, aureol, smenoqualone, strongylin A, and cyclosmenospongine belong to a family of tetracyclic meroterpenoids, which, by nature of their unique molecular structures and various biological properties, have attracted synthetic and medicinal chemists alike. Despite their obvious biosynthetic relationship, only scattered reports on the synthesis and biological investigation of individual meroterpenoids have appeared so far. Herein, we report a highly modular synthetic strategy that enabled the synthesis of each of these natural products and 15 non-natural derivatives. The route employs an auxiliary-controlled Diels-Alder reaction to enable the enantioselective construction of the decalin subunit, which is connected to variously substituted arenes by either carbonyl addition chemistry or sterically demanding sp2-sp3 cross-coupling reactions. The selective installation of either the cis- or trans-decalin stereochemistry is accomplished by an acid-mediated cyclization/isomerization reaction. Biological profiling reveals that strongylin A and a simplified derivative thereof have potent antibiotic activity against methicillin-resistant Staphylococcus aureus.
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Speck K, Magauer T. Evolution of a Polyene Cyclization Cascade for the Total Synthesis of (-)-Cyclosmenospongine. Chemistry 2016; 23:1157-1165. [PMID: 27859768 DOI: 10.1002/chem.201605029] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Indexed: 01/07/2023]
Abstract
We report a full account on the development of a unique cationic polyene cyclization for the total synthesis of the tetracyclic meroterpenoid (-)-cyclosmenospongine. A highly convergent three-component coupling strategy enabled rapid access to individual cyclization precursors that were tested for their reactivity. The successful transformation generates three rings and sets four consecutive stereocenters in a single operation proceeding in a highly efficient manner to give exclusively the trans-decalin framework. In addition, we found that the enol ether geometry and the relative configuration of C3 and C8 are crucial for the success of the polyene cyclization.
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Affiliation(s)
- Klaus Speck
- Department of Chemistry and Pharmacy, Ludwig Maximillians University Munich, Butenandtstrasse 5-13, 81377, Munich, Germany
| | - Thomas Magauer
- Department of Chemistry and Pharmacy, Ludwig Maximillians University Munich, Butenandtstrasse 5-13, 81377, Munich, Germany
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Speck K, Wildermuth R, Magauer T. Convergent Assembly of the Tetracyclic Meroterpenoid (−)-Cyclosmenospongine by a Non-Biomimetic Polyene Cyclization. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608040] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Klaus Speck
- Department of Chemistry and Pharmacy; Ludwig Maximilians University Munich; Butenandtstrasse 5-13 81377 Munich Germany
| | - Raphael Wildermuth
- Department of Chemistry and Pharmacy; Ludwig Maximilians University Munich; Butenandtstrasse 5-13 81377 Munich Germany
| | - Thomas Magauer
- Department of Chemistry and Pharmacy; Ludwig Maximilians University Munich; Butenandtstrasse 5-13 81377 Munich Germany
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Speck K, Wildermuth R, Magauer T. Convergent Assembly of the Tetracyclic Meroterpenoid (-)-Cyclosmenospongine by a Non-Biomimetic Polyene Cyclization. Angew Chem Int Ed Engl 2016; 55:14131-14135. [PMID: 27730742 DOI: 10.1002/anie.201608040] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Indexed: 11/12/2022]
Abstract
The cationic cyclization of polyenes constitutes a powerful and elegant transformation, which has been utilized by nature's biosynthetic machinery for the construction of complex polycyclic terpenoids. Previous studies by chemists to mimic this cyclization in the laboratory were limited to different modes of activation using biosynthetic-like precursors, which accommodate only simple methyl-derived substituents. Here we describe the development of an unprecedented and highly efficient polyene cyclization of an aryl enol ether containing substrate. The cyclization was shown to proceed in a stepwise manner to generate three rings and three consecutive stereocenters, two of which are tetrasubstituted, in a single flask. The developed transformation is of great synthetic value and has enabled the convergent assembly of the tetracyclic meroterpenoid (-)-cyclosmenospongine.
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Affiliation(s)
- Klaus Speck
- Department of Chemistry and Pharmacy, Ludwig Maximilians University Munich, Butenandtstrasse 5-13, 81377, Munich, Germany
| | - Raphael Wildermuth
- Department of Chemistry and Pharmacy, Ludwig Maximilians University Munich, Butenandtstrasse 5-13, 81377, Munich, Germany
| | - Thomas Magauer
- Department of Chemistry and Pharmacy, Ludwig Maximilians University Munich, Butenandtstrasse 5-13, 81377, Munich, Germany.
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Isolation of hydroquinone (benzene-1,4-diol) metabolite from halotolerant Bacillus methylotrophicus MHC10 and its inhibitory activity towards bacterial pathogens. Bioprocess Biosyst Eng 2015; 39:429-39. [PMID: 26721574 DOI: 10.1007/s00449-015-1526-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 12/16/2015] [Indexed: 01/27/2023]
Abstract
A halotolerant bacterial isolate-MHC10 with broad spectrum antibacterial activity against clinical pathogens was isolated from saltpans located in Tuticorin and Chennai (India). 16S rRNA gene analysis of MHC10 revealed close similarity to that of Bacillus methylotrophicus. The culture conditions of B. methylotrophicus MHC10 strain were optimized for antibacterial production using different carbon and nitrogen sources, as well as varying temperature, pH, sodium chloride (NaCl) concentrations and incubation periods. The maximum antibacterial activity of B. methylotrophicus MHC10 was attained when ZMB was optimized with 1 % (w/v) glucose, 0.1 % (w/v) soybean meal which corresponded to a C/N ratio of 38.83, temperature at 37 °C, pH 7.0 and 8 % NaCl. The activity remained stable between 72 and 96 h and then drastically decreased after 96 h. Solvent extraction followed by chromatographic purification steps led to the isolation of hydroquinone (benzene-1,4-diol). The structure of the purified compound was elucidated based on FTIR, (1)H NMR, and (13)C NMR spectroscopy. The compound exhibited efficient antibacterial activity against both Gram-positive and Gram-negative bacterial pathogens. The minimum inhibitory concentration (MIC) for Gram-positive pathogens ranged from 15.625 to 62.5 µg/mL(-1), while it was between 7.81 and 250 µg/mL(-1) for Gram-negative bacterial pathogens. This is the first report of hydroquinone produced by halotolerant B. methylotrophicus exhibiting promising antibacterial activity.
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Abstract
This review covers the literature published in 2013 for marine natural products (MNPs), with 982 citations (644 for the period January to December 2013) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1163 for 2013), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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Rosales A, Muñoz-Bascón J, Roldan-Molina E, Rivas-Bascón N, Padial NM, Rodríguez-Maecker R, Rodríguez-García I, Oltra JE. Synthesis of (±)-aureol by bioinspired rearrangements. J Org Chem 2015; 80:1866-70. [PMID: 25591135 DOI: 10.1021/jo502841u] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A bioinspired and sustainable procedure for the straightforward synthesis of (±)-aureol has been achieved in eight steps (14% overall yield) from epoxyfarnesol. The key steps are the titanocene(III)-catalyzed radical cascade cyclization of an epoxyfarnesol derivative and a biosynthetically inspired sequence of 1,2-hydride and methyl shifts.
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Affiliation(s)
- Antonio Rosales
- Department of Organic Chemistry, Faculty of Sciences, University of Granada , 18071 Granada, Spain
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Shan WG, Ying YM, Ma LF, Zhan ZJ. Drimane-Related Merosesquiterpenoids, a Promising Library of Metabolites for Drug Development. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2015. [DOI: 10.1016/b978-0-444-63473-3.00006-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Kamishima T, Kikuchi T, Katoh T. Total Synthesis of (+)-Strongylin A, a Rearranged Sesquiterpenoid Hydroquinone from a Marine Sponge. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300438] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Meroterpenes from marine invertebrates: structures, occurrence, and ecological implications. Mar Drugs 2013; 11:1602-43. [PMID: 23685889 PMCID: PMC3707164 DOI: 10.3390/md11051602] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 04/07/2013] [Accepted: 05/07/2013] [Indexed: 11/29/2022] Open
Abstract
Meroterpenes are widely distributed among marine organisms; they are particularly abundant within brown algae, but other important sources include microorganisms and invertebrates. In the present review the structures and bioactivities of meroterpenes from marine invertebrates, mainly sponges and tunicates, are summarized. More than 300 molecules, often complex and with unique skeletons originating from intra- and inter-molecular cyclizations, and/or rearrangements, are illustrated. The reported syntheses are mentioned. The issue of a potential microbial link to their biosynthesis is also shortly outlined.
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Katoh T. Total Synthesis of Decahydrobenzo[d]xanthene Sesquiterpenoids Aureol, Strongylin A, and Stachyflin: Development of a New Strategy for the Construction of a Common Tetracyclic Core Structure. HETEROCYCLES 2013. [DOI: 10.3987/rev-13-779] [Citation(s) in RCA: 10] [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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Abstract
A total synthesis of the marine sponge meroterpenoid (+)-aureol has been achieved in 12 steps (6% overall yield) from (+)-sclareolide. Key steps of the synthesis include a biosynthetically inspired sequence of 1,2-hydride and methyl shifts, and a biomimetic cycloetherification reaction.
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Affiliation(s)
- Kevin K W Kuan
- School of Chemistry & Physics, University of Adelaide, North Terrace, Adelaide SA 5005, Australia
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Bioactive Marine Prenylated Quinones/Quinols. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/b978-0-444-53836-9.00023-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Kiyohara H, Ichino C, Kawamura Y, Nagai T, Sato N, Yamada H. Patchouli alcohol: in vitro direct anti-influenza virus sesquiterpene in Pogostemon cablin Benth. J Nat Med 2011; 66:55-61. [DOI: 10.1007/s11418-011-0550-x] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 05/23/2011] [Indexed: 02/08/2023]
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Yong JP, Aisa HA. Chemical Modification of Rupestonic Acid and Preliminarily In Vitro Antiviral Activity Against Influenza A3and B Viruses. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.4.1293] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Gordaliza M. Cytotoxic terpene quinones from marine sponges. Mar Drugs 2010; 8:2849-70. [PMID: 21339953 PMCID: PMC3039459 DOI: 10.3390/md8122849] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Revised: 11/12/2010] [Accepted: 11/17/2010] [Indexed: 11/20/2022] Open
Abstract
The 1,4-benzoquinone moiety is a common structural feature in a large number of compounds that have received considerable attention owing to their broad spectrum of biological activities. The cytotoxic and antiproliferative properties of many natural sesquiterpene quinones and hydroquinones from sponges of the order Dictyoceratida, such as avarol, avarone, illimaquinone, nakijiquinone and bolinaquinone, offer promising opportunities for the development of new antitumor agents. The present review summarizes the structure and cytotoxicity of natural terpenequinones/hydroquinones and their bioactive analogues and derivatives.
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Affiliation(s)
- Marina Gordaliza
- Department of Pharmaceutical Chemistry, Pharmacy Faculty, Salamanca University, Campus Miguel de Unamuno, Salamanca, Spain.
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Bickmeyer U, Grube A, Klings KW, Pawlik JR, Köck M. Siphonodictyal B1 from a marine sponge increases intracellular calcium levels comparable to the Ca2+-ATPase (SERCA) inhibitor thapsigargin. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2010; 12:267-272. [PMID: 19609614 DOI: 10.1007/s10126-009-9206-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Accepted: 06/13/2009] [Indexed: 05/28/2023]
Abstract
Siphonodictyal B1 is a sesquiterpene-hydroquinone isolated from the Caribbean coral reef bioeroding sponge Siphonodictyon coralliphagum. Siphonodictyal B1 increased intracellular calcium levels in neuroendocrine cells (PC12) in the presence and absence of extracellular calcium using Fura-2 as a calcium-sensitive dye. The calcium rise was comparable in amplitude and timing to the application of the sarco-endoplasmic reticulum calcium-ATPase (SERCA) inhibitor thapsigargin from the terrestrial plant Thapsia garganica. The effects of thapsigargin and siphonodictyal B1 on intracellular calcium levels were not distinguishable in pharmacological experiments conducted with caffeine, ryanodine, muscarine, and thapsigargin in calcium-free and calcium-containing buffer, although thapsigargin was effective at lower concentrations. Thapsigargin is a sesquiterpene-lactone and has no structural similarities to siphonodictyal B1. We conclude that thapsigargin and siphonodictyal B1 share SERCAs as cellular targets. Siphonodictyal B1 may be involved in the process of bioeroding the calcium carbonate endoskeleton of the scleractinian corals attacked by S. coralliphagum.
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Affiliation(s)
- Ulf Bickmeyer
- Alfred-Wegener-Institut für Polar- und Meeresforschung in der Helmholtz-Gemeinschaft, Biologische Anstalt Helgoland, Kurpromenade 201, 27498 Helgoland, Germany.
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Ngoc DT, Albicker M, Schneider L, Cramer N. Enantioselective assembly of the benzo[d]xanthene tetracyclic core of anti-influenza active natural products. Org Biomol Chem 2010; 8:1781-4. [DOI: 10.1039/c002011g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Synthesis of rupestonic acid amide derivatives and their in vitro activity against type A3 and B flu virus and herpes simplex I and II. Chem Nat Compd 2008. [DOI: 10.1007/s10600-008-9050-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Utkina NK, Denisenko VA, Scholokova OV, Virovaya MV, Prokof'eva NG. Cyclosmenospongine, a new sesquiterpenoid aminoquinone from an Australian marine sponge Spongia sp. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(02)02497-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Terrestrial vs marine natural product diversity. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s1460-1567(02)80018-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Abstract
Since the ancient times, natural products have served as a major source of drugs. About fifty percent of today's pharmaceutical drugs are derived from natural origin. Interest in natural products as a source of new drugs is growing due to many factors that will be discussed in this article. Viruses have been resistant to therapy or prophylaxis longer than any other form of life. Currently, there are only few drugs available for the cure of viral diseases including acyclovir which is modeled on a natural product parent. In order to combat viruses which have devastating effects on humans, animals, insects, crop plants, fungi and bacteria, many research efforts have been devoted for the discovery of new antiviral natural products. Recent analysis of the number and sources of antiviral agents reported mainly in the annual reports of medicinal chemistry from 1984 to 1995 indicated that seven out of ten synthetic agents approved by FDA between 1983-1994, are modeled on a natural product parent. It has been estimated that only 5-15% of the approximately 250,000 species of higher plants have been systematically investigated for the presence of bioactive compounds while the potential of the marine environment has barely been tapped. The aim of this review is to provide an overview on the central role of natural products in the discovery and development of new antiviral drugs by displaying 340 structures of plant, marine and microbial origin that show promising in vitro antiviral activity.
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Wiedendiol-A and -B, cholesteryl ester transfer protein inhibitors from the marine sponge Xestospongia wiedenmayeri. Bioorg Med Chem Lett 1995. [DOI: 10.1016/0960-894x(95)00081-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Bourguet-Kondracki ML, Martin MT, Guyot M. Smenoqualone a novel sesquiterpenoid from the marine sponge Smenospongia sp. Tetrahedron Lett 1992. [DOI: 10.1016/s0040-4039(00)74722-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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