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Andler O, Kazmaier U. Synthesis and biological evaluation of moiramide B derivatives. Org Biomol Chem 2024; 22:5284-5288. [PMID: 38864222 DOI: 10.1039/d4ob00856a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Moiramide B is a peptide-polyketide hybrid with a bacterial origin and interesting antibiotic activity. Besides its structurally conserved peptide part, it contains a highly variable fatty acid side chain. We modified this part of the molecule by introducing a terminal alkyne, and we then subjected it to click reactions and Sonogashira couplings. This provided a library of moiramide B derivatives with high and selective in vivo activities against S. aureus.
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Affiliation(s)
- Oliver Andler
- Organic Chemistry, Saarland University, P.O. Box 151150, 66041 Saarbrücken, Germany.
| | - Uli Kazmaier
- Organic Chemistry, Saarland University, P.O. Box 151150, 66041 Saarbrücken, Germany.
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2
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Siebert A, Kazmaier U. Chemical Ligation-Mediated Total Synthesis of Corramycin. Org Lett 2024; 26:3169-3173. [PMID: 38564715 DOI: 10.1021/acs.orglett.4c00774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The ligation-mediated total synthesis of corramycin, a myxobacterial natural product of the strain Corallococcus coralloides, is presented. The synthetic strategy included using two consecutive chemical ligations for a modular and efficient preparation. Finally, the synthesis employed a Ser/Thr ligation (STL) at a new ligation site combined with classical fragment coupling. This study provides the total synthesis of corramycin and enhances the preparative toolbox of STL in organic synthesis.
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Affiliation(s)
- Andreas Siebert
- Organic Chemistry I, Saarland University, Campus, Building C4.2, D-66123 Saarbrücken, Germany
| | - Uli Kazmaier
- Organic Chemistry I, Saarland University, Campus, Building C4.2, D-66123 Saarbrücken, Germany
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Saarland University, Campus, C8.1, 66123 Saarbrücken, Germany
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3
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Absolute Stereochemistry Determination of Bioactive Marine-Derived Cyclopeptides by Liquid Chromatography Methods: An Update Review (2018-2022). MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020615. [PMID: 36677673 PMCID: PMC9867211 DOI: 10.3390/molecules28020615] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023]
Abstract
Cyclopeptides are considered as one of the most important classes of compounds derived from marine sources, due to their structural diversity and a myriad of their biological and pharmacological activities. Since marine-derived cyclopeptides consist of different amino acids, many of which are non-proteinogenic, they possess various stereogenic centers. In this respect, the structure elucidation of new molecular scaffolds obtained from natural sources, including marine-derived cyclopeptides, can become a very challenging task. The determination of the absolute configurations of the amino acid residues is accomplished, in most cases, by performing acidic hydrolysis, followed by analyses by liquid chromatography (LC). In a continuation with the authors' previous publication, and to analyze the current trends, the present review covers recently published works (from January 2018 to November 2022) regarding new cyclopeptides from marine organisms, with a special focus on their biological/pharmacological activities and the absolute stereochemical assignment of the amino acid residues. Ninety-one unreported marine-derived cyclopeptides were identified during this period, most of which displayed anticancer or antimicrobial activities. Marfey's method, which involves LC, was found to be the most frequently used for this purpose.
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4
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Marine Cyclic Peptides: Antimicrobial Activity and Synthetic Strategies. Mar Drugs 2022; 20:md20060397. [PMID: 35736200 PMCID: PMC9230156 DOI: 10.3390/md20060397] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/06/2022] [Accepted: 06/13/2022] [Indexed: 01/29/2023] Open
Abstract
Oceans are a rich source of structurally unique bioactive compounds from the perspective of potential therapeutic agents. Marine peptides are a particularly interesting group of secondary metabolites because of their chemistry and wide range of biological activities. Among them, cyclic peptides exhibit a broad spectrum of antimicrobial activities, including against bacteria, protozoa, fungi, and viruses. Moreover, there are several examples of marine cyclic peptides revealing interesting antimicrobial activities against numerous drug-resistant bacteria and fungi, making these compounds a very promising resource in the search for novel antimicrobial agents to revert multidrug-resistance. This review summarizes 174 marine cyclic peptides with antibacterial, antifungal, antiparasitic, or antiviral properties. These natural products were categorized according to their sources—sponges, mollusks, crustaceans, crabs, marine bacteria, and fungi—and chemical structure—cyclic peptides and depsipeptides. The antimicrobial activities, including against drug-resistant microorganisms, unusual structural characteristics, and hits more advanced in (pre)clinical studies, are highlighted. Nocathiacins I–III (91–93), unnarmicins A (114) and C (115), sclerotides A (160) and B (161), and plitidepsin (174) can be highlighted considering not only their high antimicrobial potency in vitro, but also for their promising in vivo results. Marine cyclic peptides are also interesting models for molecular modifications and/or total synthesis to obtain more potent compounds, with improved properties and in higher quantity. Solid-phase Fmoc- and Boc-protection chemistry is the major synthetic strategy to obtain marine cyclic peptides with antimicrobial properties, and key examples are presented guiding microbiologist and medicinal chemists to the discovery of new antimicrobial drug candidates from marine sources.
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5
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Ha MW, Kim J, Paek SM. Recent Achievements in Total Synthesis for Integral Structural Revisions of Marine Natural Products. Mar Drugs 2022; 20:md20030171. [PMID: 35323470 PMCID: PMC8951824 DOI: 10.3390/md20030171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/20/2022] [Accepted: 02/21/2022] [Indexed: 02/01/2023] Open
Abstract
A great effort to discover new therapeutic ingredients is often initiated through the discovery of the existence of novel marine natural products. Since substances produced by the marine environment might be structurally more complex and unique than terrestrial natural products, there have been cases of misassignments of their structures despite the availability of modern spectroscopic and computational chemistry techniques. When it comes to refutation to erroneously or tentatively proposed structures empirical preparations through organic chemical synthesis has the greatest contribution along with close and sophiscated inspection of spectroscopic data. Herein, we analyzed the total synthetic studies that have decisively achieved in revelation of errors, ambiguities, or incompleteness of the isolated structures of marine natural products covering the period from 2018 to 2021.
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Affiliation(s)
- Min Woo Ha
- Jeju Research Institute of Pharmaceutical Sciences, College of Pharmacy, Jeju National University, 102 Jejudaehak-ro, Jeju 63243, Jeju-do, Korea;
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, 102 Jejudaehak-ro, Jeju 63243, Jeju-do, Korea
| | - Jonghoon Kim
- Department of Chemistry, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul 06978, Korea;
| | - Seung-Mann Paek
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Gyeongnam-do, Korea
- Correspondence: ; Tel.: +82-55-772-2424
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6
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Three Methods for the Solution Phase Synthesis of Cyclic Peptides. Methods Mol Biol 2021. [PMID: 34596843 DOI: 10.1007/978-1-0716-1689-5_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Cyclic peptides, which often exhibit interesting biological properties, can be obtained by macrolactamization of adequately protected linear peptide chains. Because of the remarkable biological properties, methods for the efficient cyclization of peptides are of high interest. We herein describe three different protocols for the cyclization of peptides and depsipeptides via amide bond formation. These methods can, in principal, be applied to any linear peptide chain.
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7
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Kanki D, Nakamukai S, Ogura Y, Takikawa H, Ise Y, Morii Y, Yamawaki N, Takatani T, Arakawa O, Okada S, Matsunaga S. Homophymamide A, Heterodetic Cyclic Tetrapeptide from a Homophymia sp. Marine Sponge: A Cautionary Note on Configurational Assignment of Peptides That Contain a Ureido Linkage. JOURNAL OF NATURAL PRODUCTS 2021; 84:1848-1853. [PMID: 34081460 DOI: 10.1021/acs.jnatprod.1c00336] [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
A previously unreported heterodetic cyclic peptide, homophymamide A (1), was isolated from a Homophymia sp. marine sponge. The structure of homophymamide A was determined to be a lower homologue of anabaenopeptins by spectroscopic analysis, chemical degradation, and chemical synthesis. Analysis of the acidic hydrolysate showed that the racemization of Lys took place, leading us to pose a cautionary note on the configurational assignment of peptides that contain a ureido bond.
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Affiliation(s)
- Daichi Kanki
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
| | - Shohei Nakamukai
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
| | - Yusuke Ogura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
| | - Hirosato Takikawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
| | - Yuji Ise
- Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, 3422 Sesoko, Motobu, Okinawa 905-0227, Japan
| | - Yasuhiro Morii
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki 852-8521, Japan
| | - Nobuhiro Yamawaki
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki 852-8521, Japan
| | - Tomohiro Takatani
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki 852-8521, Japan
| | - Osamu Arakawa
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki 852-8521, Japan
| | - Shigeru Okada
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
| | - Shigeki Matsunaga
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Bunkyo-ku, Tokyo 113-8657, Japan
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8
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Andler O, Kazmaier U. Total synthesis of apratoxin A and B using Matteson's homologation approach. Org Biomol Chem 2021; 19:4866-4870. [PMID: 33998628 DOI: 10.1039/d1ob00713k] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Apratoxin A and B, two members of an interesting class of marine cyclodepsipeptides are synthesized in a straightforward manner via Matteson homologation. Starting from a chiral boronic ester, the polyketide fragment of the apratoxins was obtained via five successive homologation steps in an overall yield of 27% and very good diastereoselectivity. This approach is highly flexible and should allow modification also of this part of the natural products, while previous modifications have been carried out mainly in the peptide fragment.
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Affiliation(s)
- Oliver Andler
- Organic Chemistry, Saarland University, P.O. Box 151150, 66041 Saarbrücken, Germany.
| | - Uli Kazmaier
- Organic Chemistry, Saarland University, P.O. Box 151150, 66041 Saarbrücken, Germany.
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9
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Andler O, Kazmaier U. A Straightforward Synthesis of Polyketides via Ester Dienolate Matteson Homologation. Chemistry 2021; 27:949-953. [PMID: 33089903 PMCID: PMC7839490 DOI: 10.1002/chem.202004650] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Indexed: 12/22/2022]
Abstract
Application of ester dienolates as nucleophiles in Matteson homologations allows for the stereoselective synthesis of highly substituted α,β-unsaturated δ-hydroxy carboxyl acids, structural motifs widespread found in polyketide natural products. The protocol is rather flexible and permits the introduction of substituents and functionalities also at those positions which are not accessible by the commonly used aldol reaction. Therefore, this ester dienolate Matteson approach is an interesting alternative to the "classical" polyketide syntheses.
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Affiliation(s)
- Oliver Andler
- Institut für Organische ChemieUniversität des SaarlandesCampus C4.266123SaarbrückenGermany
| | - Uli Kazmaier
- Institut für Organische ChemieUniversität des SaarlandesCampus C4.266123SaarbrückenGermany
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10
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Carroll AR, Copp BR, Davis RA, Keyzers RA, Prinsep MR. Marine natural products. Nat Prod Rep 2021; 38:362-413. [PMID: 33570537 DOI: 10.1039/d0np00089b] [Citation(s) in RCA: 198] [Impact Index Per Article: 66.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This review covers the literature published in 2019 for marine natural products (MNPs), with 719 citations (701 for the period January to December 2019) 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 (1490 in 440 papers for 2019), together with the relevant biological activities, source organisms and country of origin. Pertinent reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. Methods used to study marine fungi and their chemical diversity have also been discussed.
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Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. and Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia and School of Enivironment and Science, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Michèle R Prinsep
- Chemistry, School of Science, University of Waikato, Hamilton, New Zealand
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11
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Cyanobacteria and Eukaryotic Microalgae as Emerging Sources of Antibacterial Peptides. Molecules 2020; 25:molecules25245804. [PMID: 33316949 PMCID: PMC7763478 DOI: 10.3390/molecules25245804] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/03/2020] [Accepted: 12/07/2020] [Indexed: 12/17/2022] Open
Abstract
Cyanobacteria and microalgae are oxygen-producing photosynthetic unicellular organisms encompassing a great diversity of species, which are able to grow under all types of extreme environments and exposed to a wide variety of predators and microbial pathogens. The antibacterial compounds described for these organisms include alkaloids, fatty acids, indoles, macrolides, peptides, phenols, pigments and terpenes, among others. This review presents an overview of antibacterial peptides isolated from cyanobacteria and microalgae, as well as their synergism and mechanisms of action described so far. Antibacterial cyanopeptides belong to different orders, but mainly from Oscillatoriales and Nostocales. Cyanopeptides have different structures but are mainly cyclic peptides. This vast peptide repertoire includes ribosomal and abundant non-ribosomal peptides, evaluated by standard conventional methodologies against pathogenic Gram-negative and Gram-positive bacteria. The antibacterial activity described for microalgal peptides is considerably scarcer, and limited to protein hydrolysates from two Chlorella species, and few peptides from Tetraselmis suecica. Despite the promising applications of antibacterial peptides and the importance of searching for new natural sources of antibiotics, limitations still persist for their pharmaceutical applications.
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12
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Krahn D, Heilmann G, Vogel FCE, Papadopoulos C, Zweerink S, Kaschani F, Meyer H, Roesch A, Kaiser M. Zelkovamycin is an OXPHOS Inhibitory Member of the Argyrin Natural Product Family. Chemistry 2020; 26:8524-8531. [PMID: 32250484 PMCID: PMC7383741 DOI: 10.1002/chem.202001577] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Indexed: 12/16/2022]
Abstract
Natural products (NPs) are an important inspirational source for developing drugs and chemical probes. In 1999, the group of Ōmura reported the constitutional elucidation of zelkovamycin. Although largely unrecognized so far, this NP displays structural similarities as well as differences to the argyrin NP family, a class of peptidic NPs with promising anticancer activities and diverse mode‐of‐action at the molecular level. By a combination of structure elucidation experiments, the first total synthesis of zelkovamycin and bioassays, the zelkovamycin configuration was determined and its previously proposed molecular structure was revised. The full structure assignment proves zelkovamycin as an additional member of the argyrins with however unique OXPHOS inhibitory properties. Zelkovamycin may therefore not only serve as a new starting point for chemical inhibitors of the OXPHOS system, but also guide customized argyrin NP isolation and biosynthesis studies.
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Affiliation(s)
- Daniel Krahn
- Chemische Biologie, Universität Duisburg-Essen, ZMB, Fakultät für Biologie, Universitätsstr. 2, 45117, Essen, Germany
| | - Geronimo Heilmann
- Chemische Biologie, Universität Duisburg-Essen, ZMB, Fakultät für Biologie, Universitätsstr. 2, 45117, Essen, Germany
| | - Felix C E Vogel
- Department of Dermatology, University hospital Essen, West German Cancer Center, University Duisburg-Essen and the German Cancer Consortium (DKTK).,Current address: Division of Tumor Metabolism and Microenvironment, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - Chrisovalantis Papadopoulos
- Molekularbiologie I, Universität Duisburg-Essen, ZMB, Fakultät für Biologie, Universitätsstr. 2, 45117, Essen, Germany
| | - Susanne Zweerink
- Chemische Biologie, Universität Duisburg-Essen, ZMB, Fakultät für Biologie, Universitätsstr. 2, 45117, Essen, Germany.,Current address: University of Cologne, Faculty of Medicine and University Hospital of Cologne, Department of Gastroenterology and Hepatology, Kerpener Str. 62, 50937, Cologne, Germany
| | - Farnusch Kaschani
- Chemische Biologie, Universität Duisburg-Essen, ZMB, Fakultät für Biologie, Universitätsstr. 2, 45117, Essen, Germany
| | - Hemmo Meyer
- Molekularbiologie I, Universität Duisburg-Essen, ZMB, Fakultät für Biologie, Universitätsstr. 2, 45117, Essen, Germany
| | - Alexander Roesch
- Department of Dermatology, University hospital Essen, West German Cancer Center, University Duisburg-Essen and the German Cancer Consortium (DKTK)
| | - Markus Kaiser
- Chemische Biologie, Universität Duisburg-Essen, ZMB, Fakultät für Biologie, Universitätsstr. 2, 45117, Essen, Germany
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13
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Kiefer A, Bader CD, Held J, Esser A, Rybniker J, Empting M, Müller R, Kazmaier U. Synthesis of New Cyclomarin Derivatives and Their Biological Evaluation towards
Mycobacterium Tuberculosis
and
Plasmodium Falciparum. Chemistry 2019; 25:8894-8902. [DOI: 10.1002/chem.201901640] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Indexed: 01/03/2023]
Affiliation(s)
- Alexander Kiefer
- Organic ChemistrySaarland University Campus C4.2 66123 Saarbrücken Germany
| | - Chantal D. Bader
- Department Microbial Natural Products (MINS)Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS)–Helmholtz Centre for Infection Research (HZI) Campus E8.1 66123 Saarbrücken Germany
| | - Jana Held
- Department of Tropical MedicineUniversity of Tübingen Wilhelmstraße 27 72074 Tübingen Germany
| | - Anna Esser
- Center for Molecular Medicine CologneUniversity of Cologne Robert Koch Str. 21 50931 Cologne Germany
| | - Jan Rybniker
- Department I of Internal MedicineUniversity of Cologne 50937 Cologne (Germany) and German Center for Infection Research (DZIF), Partner Site Bonn-Cologne Germany
| | - Martin Empting
- Department of Drug Design and Optimization (DDOP)Helmholtz-Institute for Pharmaceutical Research Saarland, (HIPS)–Helmholtz Centre for Infection Research (HZI) Campus E8.1 66123 Saarbrücken Germany
| | - Rolf Müller
- Department Microbial Natural Products (MINS)Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS)–Helmholtz Centre for Infection Research (HZI) Campus E8.1 66123 Saarbrücken Germany
- Department of PharmacySaarland University Campus E8.1 66123 Saarbrücken Germany
| | - Uli Kazmaier
- Organic ChemistrySaarland University Campus C4.2 66123 Saarbrücken Germany
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