1
|
Salim AA, Butler MS, Blaskovich MAT, Henderson IR, Capon RJ. Natural products as anthelmintics: safeguarding animal health. Nat Prod Rep 2023; 40:1754-1808. [PMID: 37555325 DOI: 10.1039/d3np00019b] [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: 08/10/2023]
Abstract
Covering literature to December 2022This review provides a comprehensive account of all natural products (500 compounds, including 17 semi-synthetic derivatives) described in the primary literature up to December 2022, reported to be capable of inhibiting the egg hatching, motility, larval development and/or the survival of helminths (i.e., nematodes, flukes and tapeworms). These parasitic worms infect and compromise the health and welfare, productivity and lives of commercial livestock (i.e., sheep, cattle, horses, pigs, poultry and fish), companion animals (i.e., dogs and cats) and other high value, endangered and/or exotic animals. Attention is given to chemical structures, as well as source organisms and anthelmintic properties, including the nature of bioassay target species, in vivo animal hosts, and measures of potency.
Collapse
Affiliation(s)
- Angela A Salim
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia, 4072.
| | - Mark S Butler
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia, 4072.
| | - Mark A T Blaskovich
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia, 4072.
| | - Ian R Henderson
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia, 4072.
| | - Robert J Capon
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia, 4072.
| |
Collapse
|
2
|
Castillo JC, Castro Agudelo B, Gálvez J, Carissan Y, Rodriguez J, Coquerel Y. Periselectivity in the aza-Diels-Alder Cycloaddition between α-Oxoketenes and N-(5-Pyrazolyl)imines: A Combined Experimental and Theoretical Study. J Org Chem 2020; 85:7368-7377. [PMID: 32396353 DOI: 10.1021/acs.joc.0c00767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The thermal 6π aza-Diels-Alder cycloadditions between α-oxoketenes, in situ derived from a thermally induced Wolff rearrangement of 2-diazo-1,3-diketones, and N-(5-pyrazolyl)imines as prototypical electron-rich 2-azadienes lead to two distinct sets of products, essentially as a function of the nature of the α-oxoketenes involved. For instance, cyclic five-membered α-oxoketenes lead preferentially to spiro hydropyridin-4-ones, which involves the α-oxoketenes as the 2π partners at their C═C double bond and the N-(5-pyrazolyl)imines as the 4π partners at their 2-azadiene moiety. In contrast, other cyclic and acyclic α-oxoketenes lead preferentially to 1,3-oxazin-4-ones, which now involves the α-oxoketenes as the 4π partners at their 1-oxadiene moiety and the N-(5-pyrazolyl)imines as the 2π partners at their C═N double bond. A computational modeling study using DFT methods allowed rationalizing this change of periselectivity: the formation of spiro hydropyridin-4-ones is under thermodynamic control while the formation of 1,3-oxazin-4-ones is kinetically controlled, and slightly thermodynamically disfavored in the five-membered ring series. The competing cyclodimerization of the α-oxoketenes is also studied in detail.
Collapse
Affiliation(s)
- Juan-Carlos Castillo
- Escuela de Ciencias Quı́micas, Universidad Pedagógica y Tecnológica de Colombia, Tunja 150003, Colombia
| | | | - Jaime Gálvez
- Grupo de Investigación en Desarrollo de Materiales y Productos (GIDEMP), Centro Nacional de Asistencia Técnica a la Industria, SENA, Cali, Colombia
| | - Yannick Carissan
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Jean Rodriguez
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Yoann Coquerel
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| |
Collapse
|
3
|
Reber KP, Burdge HE. Total Synthesis of Pyrophen and Campyrones A-C. JOURNAL OF NATURAL PRODUCTS 2018; 81:292-297. [PMID: 29363969 DOI: 10.1021/acs.jnatprod.7b00720] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The first total syntheses of the natural products pyrophen and campyrones A-C, isolated from the fungus Aspergillus niger, have been achieved in six steps starting from commercially available N-Boc amino acids. Key steps in this sequence include a vinylogous Claisen condensation to achieve fragment coupling and a dioxinone thermolysis/cyclization cascade to form the α-pyrone ring. The route described herein afforded the natural products in 15-25% overall yield, furnishing sufficient material for testing in biological assays.
Collapse
Affiliation(s)
- Keith P Reber
- Department of Chemistry, Towson University , 8000 York Road, Towson, Maryland 21252, United States
| | - Hannah E Burdge
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| |
Collapse
|
4
|
Revathi L, Ravindar L, Leng J, Rakesh KP, Qin HL. Synthesis and Chemical Transformations of Fluorosulfates. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201700591] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lekkala Revathi
- School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 205 Luoshi Road Wuhan Hubei Province 430070 P. R. China
| | - Lekkala Ravindar
- School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 205 Luoshi Road Wuhan Hubei Province 430070 P. R. China
| | - Jing Leng
- School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 205 Luoshi Road Wuhan Hubei Province 430070 P. R. China
| | - Kadalipura Puttaswamy Rakesh
- School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 205 Luoshi Road Wuhan Hubei Province 430070 P. R. China
| | - Hua-Li Qin
- School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 205 Luoshi Road Wuhan Hubei Province 430070 P. R. China
| |
Collapse
|
5
|
Žunič Kosi A, Zou Y, Hoskovec M, Vrezec A, Stritih N, Millar JG. Novel, male-produced aggregation pheromone of the cerambycid beetle Rosalia alpina, a priority species of European conservation concern. PLoS One 2017; 12:e0183279. [PMID: 28827817 PMCID: PMC5565183 DOI: 10.1371/journal.pone.0183279] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 08/01/2017] [Indexed: 01/06/2023] Open
Abstract
Several recent studies have demonstrated the great potential for exploiting semiochemicals in ecology and conservation studies. The cerambycid beetle Rosalia alpina represents one of the flagship species of saproxylic insect biodiversity in Europe. In recent years its populations appear to have declined substantially, and its range has shrunk considerably as a result of forest management and urbanization. Here, we collected volatile chemicals released by males and females of R. alpina. Analyses of the resulting extracts revealed the presence of a single male-specific compound, identified as a novel alkylated pyrone structure. In field bioassays in Slovenia, traps baited with the synthesized pyrone captured both sexes of R. alpina, indicating that the pyrone functions as an aggregation pheromone. Our results represent the first example of a new structural class of pheromones within the Cerambycidae, and demonstrate that pheromone-baited traps can provide a useful tool for sampling R. alpina. This tool could be particularly useful in the ongoing development of conservation strategies for the iconic but endangered Alpine longicorn.
Collapse
Affiliation(s)
- Alenka Žunič Kosi
- National Institute of Biology, Department of Organisms and Ecosystem Research, Ljubljana, Slovenia
| | - Yunfan Zou
- University of California, Department of Entomology, Riverside, California, United States of America
| | - Michal Hoskovec
- Institute of Organic Chemistry and Biochemistry ASCR, Prague, Czech Republic
| | - Al Vrezec
- National Institute of Biology, Department of Organisms and Ecosystem Research, Ljubljana, Slovenia
| | - Nataša Stritih
- National Institute of Biology, Department of Organisms and Ecosystem Research, Ljubljana, Slovenia
| | - Jocelyn G Millar
- University of California, Department of Entomology, Riverside, California, United States of America
| |
Collapse
|
6
|
Shinomiya S, Iwasaki A, Ohno O, Suenaga K. Total synthesis and stereochemical determination of yoshinone A. PHYTOCHEMISTRY 2016; 132:109-114. [PMID: 27765324 DOI: 10.1016/j.phytochem.2016.10.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 10/03/2016] [Accepted: 10/11/2016] [Indexed: 06/06/2023]
Abstract
In 2014, the γ-pyrone-containing polyketide, yoshinone A, was isolated from the marine cyanobacterium Leptolyngbya sp. and its structure was determined. Yoshinone A inhibited differentiation of 3T3-L1 cells into adipocytes, with an EC50 value of 420 nM without any cytotoxicity, and therefore is expected to be a lead compound for obesity drugs. To establish its absolute configuration, and to provide sufficient amounts for further research, the total synthesis of yoshinone A was achieved through synthesis of its two possible diastereomers.
Collapse
Affiliation(s)
- Seiichi Shinomiya
- Department of Chemistry, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Arihiro Iwasaki
- Department of Chemistry, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Osamu Ohno
- Department of Chemistry and Life Science, Kogakuin University, 2665-1, Nakano-Machi, Hachioji, Tokyo 192-0015, Japan
| | - Kiyotake Suenaga
- Department of Chemistry, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
| |
Collapse
|
7
|
Cookson R, Barrett TN, Barrett AGM. β-Keto-dioxinones and β,δ-diketo-dioxinones in biomimetic resorcylate total synthesis. Acc Chem Res 2015; 48:628-42. [PMID: 25689674 DOI: 10.1021/ar5004169] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Resorcylates are a large group of bioactive natural products that are biosynthesized from acetate and malonate units via the intermediacy of polyketides. These polyketides undergo cyclization reactions to introduce the aromatic core. The bioactivities of the resorcylates including resorcylate macrocyclic lactones include anticancer, antimalarial, mycotoxicity, antifungal, and antibiotic properties, and several compounds in the series are already in use in medicine. Examples are prodrugs derived from mycophenolic acid as immunosuppressants and the Hsp-90 inhibitor, AT13387, which is in phase-II clinical trials for the treatment of small cell lung cancer and melanoma. In consequence of these biological activities, methods for the concise synthesis of diverse resorcylates are of considerable importance. In natural product chemistry, biomimetic total synthesis can have significant advantages including functional group tolerance in key steps, the minimization of the use of protection and deprotection reactions and the shortening of the total number of synthetic steps. This Account provides a description of our adaption of the dioxinone chemistry of Hyatt, Clemens, and Feldman for the synthesis and retro-Diels-Alder reactions of diketo-dioxinones. Such dioxinones, which were synthesized by a range of C-acylation reactions, were found to undergo retro-Diels-Alder reactions on heating to provide the corresponding triketo-ketenes with the loss of acetone. The ketene reactive intermediates were rapidly trapped both inter- and intramolecularly with alcohols to provide the corresponding β,δ,ζ-triketo-esters. These compounds, which consist of keto-enol mixtures, readily undergo cycloaromatization to produce resorcylate esters and macrocyclic lactones. We have established the use of diketo-dioxinones as key general intermediates for the synthesis of diverse resorcylate natural products and for the synthesis of new classes of compounds for the generation of medicinal chemistry lead structures. Many of the methods used were found to be tolerant of multiple sensitive functional groups. These include enolate C-acylations with acyl chlorides, 1-acyl-benzotriazoles, acyl imidazolides, or Weinreb amides to prepare diketo-dioxinones and their subsequent use to prepare β,δ,ζ-triketo-esters and lactones and hence resorcylates. In addition, in most cases, phenol protection was avoided. As an alternative to the synthesis of β,δ,ζ-triketo-esters, diketo-dioxinones were also found to undergo cycloaromatization with retention of the ketal entity via a nonketene pathway. Finally, diketo-dioxinones with an allyl, prenyl, geranyl, or other 2-alkenyl carboxylate esters at the γ-carbon underwent decarboxylative rearrangement with tetrakis(triphenylphosphine)palladium catalysis to produce α-substituted diketo-dioxinones and resorcylates with 3-allyl, prenyl, geranyl, or other 2-alkenyl groups. Such diketo-dioxinone chemistry was used in the total synthesis of natural products including aigialomycin, cruentaren A, and the oligomeric resorcylate antibiotics ent-W1278 A, B, and C. Additionally, tandem use of the decarboxylative rearrangement process and cycloaromatization was used in the total synthesis of natural products including the methyl ester of cristatic acid, mycophenolic acid, and hongoquercin B. The methodology was also applied to the synthesis of 9,10-anthraquinones, o-aminoalkyl resorcylates, dihydroxyisoindolinones, oligomers, and resorcinamides. The development of this methodology is described in this Account, showcasing its applicability and versatility for the synthesis of complex resorcylate products.
Collapse
Affiliation(s)
- Rosa Cookson
- Department of Chemistry, Imperial College London, London SW7 2AZ, England
| | - Tim N. Barrett
- Department of Chemistry, Imperial College London, London SW7 2AZ, England
| | | |
Collapse
|
8
|
Hoffmeister L, Fukuda T, Pototschnig G, Fürstner A. Total Synthesis of an Exceptional Brominated 4-Pyrone Derivative of Algal Origin: An Exercise in Gold Catalysis and Alkyne Metathesis. Chemistry 2015; 21:4529-33. [DOI: 10.1002/chem.201500437] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Indexed: 02/03/2023]
|
9
|
Nocapyrones: α- and γ-pyrones from a marine-derived Nocardiopsis sp. Mar Drugs 2014; 12:4110-25. [PMID: 25007160 PMCID: PMC4113818 DOI: 10.3390/md12074110] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 06/04/2014] [Accepted: 06/20/2014] [Indexed: 12/29/2022] Open
Abstract
One new α-pyrone (nocapyrone R (1)), and three known γ-pyrones (nocapyrones B, H and L (2-4)) were isolated from the culture extract of a Nocardiopsis strain collected from marine sediment. Structures of these compounds were determined on the basis of spectroscopic data including NMR and MS. γ-Pyrones 2-4 were found to induce adiponectin production in murine ST-13 preadipocyte cells but the α-pyrone 1 had no activity. The absolute configuration of the anteiso-methyl branching in 4 was determined by HPLC comparison of a degraded product of 4 with standard samples as a 2:3 enantiomeric mixture of (R)- and (S)-isomers.
Collapse
|
10
|
Jeso V, Yang C, Cameron MD, Cleveland JL, Micalizio GC. Synthesis and SAR of Lehualide B: a marine-derived natural product with potent anti-multiple myeloma activity. ACS Chem Biol 2013; 8:1241-52. [PMID: 23547759 PMCID: PMC3758376 DOI: 10.1021/cb300582s] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We report a concise and convergent laboratory synthesis of the rare marine natural product lehualide B that has led to the discovery that (1) this compound has low nanomolar activity against human multiple myeloma cells and (2) the anticancer effects of lehualide B and its analogues are selective (i.e., they are approximately 2-3 orders of magnitude less toxic to human breast cancer cells). Synthetic lehualide B is shown to be an effective inhibitor of complex I of the mitochondrial electron transport chain, with potency similar to that observed for the terrestrial natural products piericidin A1 and rotenone, an observation that led to the discovery that piericidin A1 is also selectively cytotoxic toward human multiple myeloma cells. Interestingly, synthetic derivatives of lehualide B that resemble verticipyrone (an established complex I inhibitor composed of a γ-pyrone and a simple monounsaturated hydrophobic chain) lack the potent antimyeloma activity of the natural product. Finally, the synthesis and evaluation of a collection of lehualide-inspired analogues led to the elucidation of structure-activity relationships for this rare natural product that established important roles for the substituted γ-pyrone headgroup and the skipped polyene side chain.
Collapse
Affiliation(s)
- Valer Jeso
- Departments of Chemistry, The Scripps Research Institute, Scripps Florida, Jupiter, Florida 33458
| | - Chunying Yang
- Cancer Biology, The Scripps Research Institute, Scripps Florida, Jupiter, Florida 33458
| | - Michael D. Cameron
- Molecular Therapeutics, The Scripps Research Institute, Scripps Florida, Jupiter, Florida 33458
| | - John L. Cleveland
- Cancer Biology, The Scripps Research Institute, Scripps Florida, Jupiter, Florida 33458
| | - Glenn C. Micalizio
- Departments of Chemistry, The Scripps Research Institute, Scripps Florida, Jupiter, Florida 33458
| |
Collapse
|
11
|
Takemura T, Hayakawa I, Fukasawa E, Sengoku T, Kigoshi H. Toward the synthesis of γ-pyrone-containing natural products: diastereoselective aldol-type reaction of a γ-pyrone. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.05.111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
12
|
Guo X, Liu T, Deng Z, Cane DE. Essential role of the donor acyl carrier protein in stereoselective chain translocation to a fully reducing module of the nanchangmycin polyketide synthase. Biochemistry 2012; 51:879-87. [PMID: 22229794 PMCID: PMC3273620 DOI: 10.1021/bi201768v] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Incubation of recombinant module 2 of the polyether nanchangmycin synthase (NANS), carrying an appended thioesterase domain, with the ACP-bound substrate (2RS)-2-methyl-3-ketobutyryl-NANS_ACP1 (2-ACP1) and methylmalonyl-CoA in the presence of NADPH gave diastereomerically pure (2S,4R)-2,4-dimethyl-5-ketohexanoic acid (4a). These results contrast with the previously reported weak discrimination by NANS module 2+TE between the enantiomers of the corresponding N-acetylcysteamine-conjugated substrate analogue (±)-2-methyl-3-ketobutyryl-SNAC (2-SNAC), which resulted in formation of a 5:3 mixture of 4a and its (2S,4S)-diastereomer 4b. Incubation of NANS module 2+TE with 2-ACP1 in the absence of NADPH gave unreduced 3,5,6-trimethyl-4-hydroxypyrone (3) with a k(cat) of 4.4 ± 0.9 min⁻¹ and a k(cat)/K(m) of 67 min⁻¹ mM⁻¹, corresponding to a ∼2300-fold increase compared to the k(cat)/K(m) for the diffusive substrate 2-SNAC. Covalent tethering of the 2-methyl-3-ketobutyryl thioester substrate to the NANS ACP1 domain derived from the natural upstream PKS module of the nanchangmycin synthase significantly enhanced both the stereospecificity and the kinetic efficiency of the sequential polyketide chain translocation and condensation reactions catalyzed by the ketosynthase domain of NANS module 2.
Collapse
Affiliation(s)
- Xun Guo
- Department of Chemistry, Box H, Brown University, Providence, Rhode Island 02912-9108, USA
| | - Tiangang Liu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, P. R. China
| | - Zixin Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, P. R. China
- Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiaotong University, Shanghai 200030, P. R. China
| | - David E. Cane
- Department of Chemistry, Box H, Brown University, Providence, Rhode Island 02912-9108, USA
| |
Collapse
|
13
|
Rosso H, De Paolis M, Collin VC, Dey S, Hecht SM, Prandi C, Richard V, Maddaluno J. One-Pot Regio- and Stereoselective Synthesis of α′-Methoxy-γ-pyrones: Biological Evaluation as Mitochondrial Respiratory Complex Inhibitors. J Org Chem 2011; 76:9429-37. [DOI: 10.1021/jo201683u] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Helena Rosso
- Laboratoire des Fonctions Azotées et Oxygénées Complexes de l’IRCOF, CNRS UMR 6014 & FR 3038, Université de Rouen, Mont Saint-Aignan, France
- Dipartimento di Chimica Generale
e Chimica Organica, Universita di Torino, via P. Giuria 7, 10125, Torino, Italy
| | - Michaël De Paolis
- Laboratoire des Fonctions Azotées et Oxygénées Complexes de l’IRCOF, CNRS UMR 6014 & FR 3038, Université de Rouen, Mont Saint-Aignan, France
| | - Valérie C. Collin
- Center for BioEnergetics, The
Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Sriloy Dey
- Center for BioEnergetics, The
Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Sidney M. Hecht
- Center for BioEnergetics, The
Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Cristina Prandi
- Dipartimento di Chimica Generale
e Chimica Organica, Universita di Torino, via P. Giuria 7, 10125, Torino, Italy
| | - Vincent Richard
- Laboratoire des Fonctions Azotées et Oxygénées Complexes de l’IRCOF, CNRS UMR 6014 & FR 3038, Université de Rouen, Mont Saint-Aignan, France
| | - Jacques Maddaluno
- Laboratoire des Fonctions Azotées et Oxygénées Complexes de l’IRCOF, CNRS UMR 6014 & FR 3038, Université de Rouen, Mont Saint-Aignan, France
| |
Collapse
|
14
|
Guo X, Liu T, Valenzano CR, Deng Z, Cane DE. Mechanism and stereospecificity of a fully saturating polyketide synthase module: nanchangmycin synthase module 2 and its dehydratase domain. J Am Chem Soc 2011; 132:14694-6. [PMID: 20925339 DOI: 10.1021/ja1073432] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Recombinant nanchangmycin synthase module 2 (NANS module 2), with the thioesterase domain from the 6-deoxyerythronolide B synthase (DEBS TE) appended to the C-terminus, was cloned and expressed in Escherichia coli. Incubation of NANS module 2+TE with (±)-2-methyl-3-keto-butyryl-N-acetylcysteamine thioester (1), the SNAC analog of the natural ACP-bound substrate, with methylmalonyl-CoA (MM-CoA) in the absence of NADPH gave 3,5,6-trimethyl-4-hydroxypyrone (2), identified by direct comparison with synthetic 2 by radio-TLC-phosphorimaging and LC-ESI(+)-MS-MS. The reaction showed k(cat) 0.5 ± 0.1 min(-1) and K(m)(1) 19 ± 5 mM at 0.5 mM MM-CoA and k(cat)(app) 0.26 ± 0.02 min(-1) and K(m)(MM-CoA) 0.11 ± 0.02 mM at 8 mM 1. Incubation in the presence of NADPH generated the fully saturated triketide chain elongation product as a 5:3 mixture of (2S,4R)-2,4-dimethyl-5-ketohexanoic acid (3a) and the diastereomeric (2S,4S)-3b. The structure and stereochemistry of each product was established by comparison with synthetic 3a and 3b by a combination of radio-TLC-phosphorimaging and LC-ESI(-)-MS-MS, as well as chiral capillary GC-MS analysis of the corresponding methyl esters 3a-Me and 3b-Me. The recombinant dehydratase domain from NANS module 2, NANS DH2, was shown to catalyze the formation of an (E)-double bond by syn-dehydration of the ACP-bound substrate anti-(2R,3R,4S,5R)-2,4-dimethyl-3,5-dihydroxyheptanoyl-ACP6 (4), generated in situ by incubation of (2S,3R)-2-methyl-3-hydroxypentanoyl-SNAC (5), methylmalonyl-CoA, and NADPH with the recombinant [KS6][AT6] didomain and ACP6 from DEBS module 6 along with the ketoreductase from the tylactone synthase module 1 (TYLS KR1). These results also indirectly establish the stereochemistry of the reactions catalyzed by the KR and enoylreductase (ER) domains of NANS module 2.
Collapse
Affiliation(s)
- Xun Guo
- Department of Chemistry, Box H, Brown University, Providence, Rhode Island 02912-9108, USA
| | | | | | | | | |
Collapse
|
15
|
Jahn U, Dinca E. Toward the elucidation of the metabolism of 15-E(2)-isoprostane: the total synthesis of the methyl ester of a potential central metabolite. J Org Chem 2010; 75:4480-91. [PMID: 20527974 DOI: 10.1021/jo1006569] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An 11-step total synthesis of the methyl ester of a potential metabolite of the autoxidatively formed natural product 15-E(2)-IsoP, whose metabolism is not known, is reported. Several vinylogous Mukaiyama aldol additions were tested for the assembly of the acyclic C7-C20 precursor. A new oxidative dianion cyclization served to access the cyclopentane core. The full carbon skeleton was synthesized by an acetylide alkylation. The overall yield of the metabolite amounts to 1.4% for the most efficient route. The results demonstrate convincingly that E(2)-IsoP metabolites are highly epimerization-sensitive and that they may thus also contribute to PGE(2)-action and metabolism.
Collapse
Affiliation(s)
- Ullrich Jahn
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo namesti 2, 16610 Prague 6, Czech Republic.
| | | |
Collapse
|
16
|
De Paolis M, Rosso H, Henrot M, Prandi C, d'Herouville F, Maddaluno J. A Concise Route to α′-Methoxy-γ-pyrones and Verticipyrone Based Upon the Desymmetrization of α,α′-Dimethoxy-γ-pyrone. Chemistry 2010; 16:11229-32. [DOI: 10.1002/chem.201001780] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
17
|
Jiménez T, Campaña AG, Bazdi B, Paradas M, Arráez-Román D, Segura-Carretero A, Fernández-Gutiérrez A, Oltra JE, Robles R, Justicia J, Cuerva JM. Radical Reduction of Epoxides Using a Titanocene(III)/Water System: Synthesis of β-Deuterated Alcohols and Their Use as Internal Standards in Food Analysis. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000487] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
18
|
Leiris SJ, Khdour OM, Segerman ZJ, Tsosie KS, Chapuis JC, Hecht SM. Synthesis and evaluation of verticipyrone analogues as mitochondrial complex I inhibitors. Bioorg Med Chem 2010; 18:3481-93. [PMID: 20456960 PMCID: PMC6426446 DOI: 10.1016/j.bmc.2010.03.070] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 03/24/2010] [Accepted: 03/26/2010] [Indexed: 11/28/2022]
Abstract
Verticipyrone has recently been isolated from the culture broth of Verticillium sp. and shown to inhibit NADH fumarate reductase, as well as NADH oxidoreductase (complex I) of the mitochondrial electron transport chain. In order to assess the structural elements in verticipyrone essential for complex I inhibitor, 15 structural analogues were prepared and analyzed for their effects on mitochondrial NADH oxidoreductase and NADH oxidase activities. Also measured were the abilities of several of the analogues to inhibit respiration as judged by a shift to glycolysis, and to inhibit the growth of several mammalian cell lines. The nature of the pyrone ring was shown to be important to potency of inhibition, as was the length and nature of substituents in the side chain of the analogues.
Collapse
Affiliation(s)
- Simon J. Leiris
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Omar M. Khdour
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Zachary J. Segerman
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Krystal S. Tsosie
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Jean-Charles Chapuis
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Sidney M. Hecht
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| |
Collapse
|
19
|
Lipshutz BH, Amorelli B. Carboalumination/Ni-catalyzed couplings. A short synthesis of verticipyrone. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.02.167] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
20
|
Zhang T, Huang X, Xue J, Sun S. Ring expansion reaction of α-sulfonyl cyclic ketones via insertion of arynes into C–C: a facile and mild access to medium- and large-sized benzannulated carbocycles. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.01.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
21
|
Wilk W, Waldmann H, Kaiser M. γ-Pyrone natural products—A privileged compound class provided by nature. Bioorg Med Chem 2009; 17:2304-9. [DOI: 10.1016/j.bmc.2008.11.001] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2008] [Revised: 11/01/2008] [Accepted: 11/04/2008] [Indexed: 12/31/2022]
|
22
|
Hosokawa S, Yokota K, Imamura K, Suzuki Y, Kawarasaki M, Tatsuta K. Total Synthesis of an Anti-Helicobacter pyloriAgent, Actinopyrone A. Chem Asian J 2008; 3:1415-21. [DOI: 10.1002/asia.200800109] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
23
|
Shojaei H, Li-Böhmer Z, von Zezschwitz P. Iromycins: A New Family of Pyridone Metabolites from Streptomyces sp. II. Convergent Total Synthesis. J Org Chem 2007; 72:5091-7. [PMID: 17564460 DOI: 10.1021/jo070327j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The total synthesis of iromycin A (1a), a microbial metabolite combining a novel structure with an interesting biological activity as a NO synthase inhibitor, was accomplished using a flexible and highly convergent approach. Thus, the ring fragment was prepared as 6-bromomethylpyrone 27 by acylation of the respective beta-ketoester 13 and subsequent lactonization of the thus-obtained beta,delta-diketoester 11, followed by bromination of the 6-methyl group. In addition, the unsaturated side chain was efficiently prepared as terminal alkyne 34 which was then carboaluminated to furnish the alkenyldimethylalane 35. The assembly of these two fragments was thoroughly studied using nickel, palladium, and copper catalysts yet only succeeded in the absence of any transition metal after formation of the respective lithium alkenyltrialkylalanate. Treatment of the coupled product 41 with liquid ammonia then completed the total synthesis which furnished an 18% overall yield over the nine steps of the longest linear sequence.
Collapse
Affiliation(s)
- Heydar Shojaei
- Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany
| | | | | |
Collapse
|
24
|
Surup F, Wagner O, von Frieling J, Schleicher M, Oess S, Müller P, Grond S. The iromycins, a new family of pyridone metabolites from Streptomyces sp. I. Structure, NOS inhibitory activity, and biosynthesis. J Org Chem 2007; 72:5085-90. [PMID: 17564461 DOI: 10.1021/jo0703303] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The iromycins A-D are members of a new family of rare alpha-pyridone metabolites. The isolation and structure elucidation of these microbial secondary metabolites from Streptomyces sp. Dra 17 revealed a N-heterocyclic core structure with two unusual side chains. Iromycins act as inhibitors of nitric oxide synthases (NOS), a protein family, which produces the crucial second messenger nitric oxide (NO). Importantly, these compounds inhibit selectively endothelial NOS rather than neuronal NOS and thus set prospects for both medical therapy and basic research. Feeding experiments with 13C- and 15N -labeled precursors indicated an uncommon type of polyketide biosynthesis and clearly ruled out an isoprenoid origin. A detoxification pathway of a particular secondary metabolite in the host strain is a rare observation and here we demonstrate it with the iromycin family.
Collapse
Affiliation(s)
- Frank Surup
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany
| | | | | | | | | | | | | |
Collapse
|