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Luo B, Ning Y, Rao B. Comprehensive Overview of β-Methoxyacrylate Derivatives as Cytochrome bc1 Inhibitors for Novel Pesticide Discovery. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:15615-15630. [PMID: 36480156 DOI: 10.1021/acs.jafc.2c04820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
β-Methoxyacrylate derivatives represent a new class of pesticides, which have attracted increasing attention owing to their unique structure, broad biological activity, and unique mechanisms of action. They inhibit mitochondrial respiration via preventing electron transfer at the Qo site of the cytochrome bc1 complex and thus are identified as cyt bc1 inhibitors. A variety of β-methoxyacrylate derivatives have been reported by many research groups for discovery of novel pesticides with improved expected activities. This review focuses on development of β-methoxyacrylate derivatives with great significance as pesticides such as fungicides, acaricides, insecticides, herbicides, and antiviral agents. In addition, the structure-activity relationships (SARs) of β-methoxyacrylate derivatives are summarized. Moreover, the cause of resistance to β-methoxyacrylate fungicides and some solutions are also introduced. Finally, the development trend of β-methoxyacrylate derivatives as pesticides is explored. We hope the review will give a guide to develop novel β-methoxyacrylate pesticides in the future.
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Affiliation(s)
- Bo Luo
- College of Life Sciences, Tea Plant Biology Key Laboratory of Henan Province, Xinyang Normal University, Xinyang 464000, China
| | - Yuli Ning
- College of Life Sciences, Tea Plant Biology Key Laboratory of Henan Province, Xinyang Normal University, Xinyang 464000, China
| | - Benqiang Rao
- College of Life Sciences, Tea Plant Biology Key Laboratory of Henan Province, Xinyang Normal University, Xinyang 464000, China
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2
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Shen X, Zhang L, Xing S, Zhang XW, Xiong GL, Cong YW, Xiao H, Wang XR, Yu ZY. Inhibition of pyrimidine biosynthesis by strobilurin derivatives induces differentiation of acute myeloid leukemia cells. Leuk Lymphoma 2021; 63:1202-1210. [PMID: 34877904 DOI: 10.1080/10428194.2021.2008382] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
All-trans retinoic acid-based differentiation therapies have succeeded in the treatment of acute promyelocytic leukemia, which is a rare subtype of acute myeloid leukemia (AML). Their clinical efficacy is negligible, however, for other subtypes of AML. Here, we showed that strobilurin derivatives, a well-established class of inhibitors of mitochondrial electron transport chain (ETC) complex III, possessed differentiation-inducing activity in AML cells. Impairment of mitochondrial ETC activity was involved in the differentiation effects of strobilurin derivatives, where reactive oxygen species generation appeared unnecessary. Conversely, strobilurin derivative-mediated differentiation was triggered by pyrimidine deficiency, which resulted from the inhibition of the mitochondrial-coupled dihydroorotate dehydrogenase enzyme. Moreover, strobilurin derivative-mediated pyrimidine depletion led to the activation of the Akt/mTOR cascade, which was required for the differentiation. Our study provided evidence that strobilurin derivatives may represent a novel class of differentiation-inducing agents for the treatment of AML.
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Affiliation(s)
- Xing Shen
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Lu Zhang
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,Department of Clinical Laboratory, The General Hospital of PLA Rocket Force, Beijing, China
| | - Shuang Xing
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Xue-Wen Zhang
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Guo-Lin Xiong
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Yu-Wen Cong
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - He Xiao
- Department of Molecular Immunology, Institute of Pharmacology and Toxicology, Beijing, China
| | - Xin-Ru Wang
- Department of Clinical Laboratory, The General Hospital of PLA Rocket Force, Beijing, China
| | - Zu-Yin Yu
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,School of Life Science, Anhui Medical University, Hefei, China
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3
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Synthesis and Herbicidal Activity of Novel β-Methoxyacrylate Derivatives Containing a Substituted Phenylpyridine Moiety. Chem Res Chin Univ 2019. [DOI: 10.1007/s40242-019-9128-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Lee S, Kwon OS, Lee CS, Won M, Ban HS, Ra CS. Synthesis and biological evaluation of kresoxim-methyl analogues as novel inhibitors of hypoxia-inducible factor (HIF)-1 accumulation in cancer cells. Bioorg Med Chem Lett 2017; 27:3026-3029. [PMID: 28526370 DOI: 10.1016/j.bmcl.2017.05.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 05/06/2017] [Accepted: 05/08/2017] [Indexed: 02/01/2023]
Abstract
We designed and synthesized strobilurin analogues as hypoxia-inducible factor (HIF) inhibitors based on the molecular structure of kresoxim-methyl. Biological evaluation in human colorectal cancer HCT116 cells showed that most of the synthesized kresoxim-methyl analogues possessed moderate to potent inhibitory activity against hypoxia-induced HIF-1 transcriptional activation. Three candidates, compounds 11b, 11c, and 11d were identified as potent inhibitors against HIF-1 activation with IC50 values of 0.60-0.94µM. Under hypoxic condition, compounds 11b, 11c, and 11d increased the intracellular oxygen contents, thereby attenuating the hypoxia-induced accumulation of HIF-1α protein.
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Affiliation(s)
- Sanghyuck Lee
- School of Chemistry and Biochemistry, Yeungnam University, 280 Daehak-Ro, Gyeongsan-si, Gyeongbuk 38541, Republic of Korea
| | - Oh Seok Kwon
- Hazards Monitoring Bionano Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Chang-Soo Lee
- Hazards Monitoring Bionano Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Misun Won
- Personalized Genomic Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Hyun Seung Ban
- Metabolic Regulation Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea; Biomolecular Science, University of Science and Technology, Daejeon 34113, Republic of Korea.
| | - Choon Sup Ra
- School of Chemistry and Biochemistry, Yeungnam University, 280 Daehak-Ro, Gyeongsan-si, Gyeongbuk 38541, Republic of Korea.
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5
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Perin G, Barcellos A, Peglow TJ, Nobre PC, Cargnelutti R, Lenardão EJ, Marini F, Santi C. Tellurium-promoted stereoselective hydrodebromination of 1,1-dibromoalkenes: synthesis of (E)-bromoalkenes. RSC Adv 2016. [DOI: 10.1039/c6ra24295b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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6
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Vatansever EC, Kılıç K, Özer MS, Koza G, Menges N, Balci M. Intermolecular heterocyclization of alkynones with 2-mercaptoacetaldehyde under metal-free conditions: synthesis of 2,3-disubstituted thiophenes. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.07.090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Synthesis of novel strobilurin-pyrimidine derivatives and their antiproliferative activity against human cancer cell lines. Bioorg Med Chem Lett 2013; 23:3505-10. [PMID: 23664877 DOI: 10.1016/j.bmcl.2013.04.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 04/10/2013] [Accepted: 04/18/2013] [Indexed: 11/22/2022]
Abstract
A series of new strobilurin-pyrimidine analogs were designed and synthesized based on the structures of our previously discovered antiproliferative compounds I and II. Biological evaluation with two human cancer cell lines (A549 and HL60) showed that most of these compounds possessed moderate to potent antiproliferative activity. Two potent candidates (8f, IC50=2.2 nM and 11d, IC50=3.4 nM) were identified with nanomolar activity against leukemia cancer cell line HL60 for further development. This activity represents a 1000- to 2500-fold improvement compared to the parent compounds I and II and is 20- to 30-fold better than the chemotherapy drug, doxorubicin. The present work provides strong incentive for further development of these strobilurin-pyrimidine analogs as potential antitumor agents for the treatment of leukemia.
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Witschel M, Rottmann M, Kaiser M, Brun R. Agrochemicals against malaria, sleeping sickness, leishmaniasis and Chagas disease. PLoS Negl Trop Dis 2012; 6:e1805. [PMID: 23145187 PMCID: PMC3493374 DOI: 10.1371/journal.pntd.0001805] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 07/18/2012] [Indexed: 12/30/2022] Open
Abstract
In tropical regions, protozoan parasites can cause severe diseases with malaria, leishmaniasis, sleeping sickness, and Chagas disease standing in the forefront. Many of the drugs currently being used to treat these diseases have been developed more than 50 years ago and can cause severe adverse effects. Above all, resistance to existing drugs is widespread and has become a serious problem threatening the success of control measures. In order to identify new antiprotozoal agents, more than 600 commercial agrochemicals have been tested on the pathogens causing the above mentioned diseases. For all of the pathogens, compounds were identified with similar or even higher activities than the currently used drugs in applied in vitro assays. Furthermore, in vivo activity was observed for the fungicide/oomyceticide azoxystrobin, and the insecticide hydramethylnon in the Plasmodium berghei mouse model, and for the oomyceticide zoxamide in the Trypanosoma brucei rhodesiense STIB900 mouse model, respectively. Even though agrochemistry and infectious disease control have the same principle goal – the suppression of harmful organisms without harming human health and the environment – there have been only very limited activities to exploit this overlap for the development of new antiinfectious drugs so far. In this study and for the first time, over 600 commercial agrochemicals were systematically screened against the infectious pathogens causing malaria, sleeping sickness, Chagas disease and leishmaniasis. Many highly active compounds with known low mammalian toxicity were identified in cell based assays, and the activity of some of them could even be confirmed in first animal model studies. Further expansion of this concept to other pathogens and the examination of analogues of the identified hits, potentially available from agrochemical companies, would allow for a very efficient source of novel drug candidates.
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Affiliation(s)
- Matthias Witschel
- BASF SE, Global Research Herbicides, Ludwigshafen, Germany
- * E-mail: (MW); (RB)
| | - Matthias Rottmann
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Marcel Kaiser
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Reto Brun
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
- * E-mail: (MW); (RB)
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9
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Wang L, Xia XD, Guo W, Chen JR, Xiao WJ. Palladium-catalyzed C–H acetoxylation of 2-methoxyimino-2-aryl-acetates and acetamides. Org Biomol Chem 2011; 9:6895-8. [DOI: 10.1039/c1ob05887h] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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11
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Synthesis, characterization and thermal properties of homo and copolymers of 3,5-dimethoxyphenyl methacrylate with glycidyl methacrylate: Determination of monomer reactivity ratios. REACT FUNCT POLYM 2009. [DOI: 10.1016/j.reactfunctpolym.2009.02.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Convenient one-pot synthesis of functionalized (E)-2-arylvinyl bromides from (E)-4-(2-bromovinyl)phenyl acetate. CHINESE CHEM LETT 2009. [DOI: 10.1016/j.cclet.2009.01.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Allen A, Villeneuve K, Cockburn N, Fatila E, Riddell N, Tam W. Alkynyl Halides in Ruthenium(II)-Catalyzed [2+2] Cycloadditions of Bicyclic Alkenes. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800424] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Schlitzer M. Malaria Chemotherapeutics Part I: History of Antimalarial Drug Development, Currently Used Therapeutics, and Drugs in Clinical Development. ChemMedChem 2007; 2:944-86. [PMID: 17530725 DOI: 10.1002/cmdc.200600240] [Citation(s) in RCA: 179] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Since ancient times, humankind has had to struggle against the persistent onslaught of pathogenic microorganisms. Nowadays, malaria is still the most important infectious disease worldwide. Considerable success in gaining control over malaria was achieved in the 1950s and 60s through landscaping measures, vector control with the insecticide DDT, and the widespread administration of chloroquine, the most important antimalarial agent ever. In the late 1960s, the final victory over malaria was believed to be within reach. However, the parasites could not be eradicated because they developed resistance against the most widely used and affordable drugs of that time. Today, cases of malaria infections are on the rise and have reached record numbers. This review gives a short description of the malaria disease, briefly addresses the history of antimalarial drug development, and focuses on drugs currently available for malaria therapy. The present knowledge regarding their mode of action and the mechanisms of resistance are explained, as are the attempts made by numerous research groups to overcome the resistance problem within classes of existing drugs and in some novel classes. Finally, this review covers all classes of antimalarials for which at least one drug candidate is in clinical development. Antimalarial agents that are solely in early development stages will be addressed in a separate review.
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Affiliation(s)
- Martin Schlitzer
- Institut für Pharmazeutische Chemie, Philipps-Universität Marburg, Marbacher Weg 6, 35032 Marburg, Germany.
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15
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Ojo-Amaize EA, Nchekwube EJ, Cottam HB, Oyemade OA, Adesomoju AA, Okogun JI. Plasmodium berghei: antiparasitic effects of orally administered hypoestoxide in mice. Exp Parasitol 2007; 117:218-21. [PMID: 17568581 DOI: 10.1016/j.exppara.2007.04.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2006] [Revised: 04/24/2007] [Accepted: 04/25/2007] [Indexed: 12/13/2022]
Abstract
Hypoestoxide (HE) is a diterpene isolated from Hypoestes rosea (Acanthaceae), a plant indigenous to Nigeria. Previous studies demonstrated that HE exhibited potent anti-inflammatory and anti-cancer activities in well established animal models but weak in vitro activities in both the anti-inflammation and anti-cancer in vitro screening systems. We now report a similar observation in the in vitro and in vivo screening systems for antimalarial activity. The results indicate that while HE exhibits a relatively weak in vitro activity (IC(50) = 10 microM versus 0.11 microM for chloroquine) against different strains of cultured P. falciparum parasites, the dose of HE required to reduce parasitemia by 90% in Plasmodium berghei-infected mice, is much lower than standard antimalaria drugs (SD(90) = 250 microg/kg versus 5mg/kg for chloroquine). Furthermore, lower doses of HE were much more effective than higher doses in inhibiting parasite development. The implications of these findings are discussed.
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Abstract
Every year, forty percent of the world population is at risk of contracting malaria. Hopes for the erradication of this disease during the 20th century were dashed by the ability of Plasmodium falciparum, its most deadly causative agent, to develop resistance to available drugs. Efforts to produce an effective vaccine have so far been unsuccessful, enhancing the need to develop novel antimalarial drugs. In this review, we summarize our knowledge concerning existing antimalarials, mechanisms of drug-resistance development, the use of drug combination strategies and the quest for novel anti-plasmodial compounds. We emphasize the potential role of host genes and molecules as novel targets for newly developed drugs. Recent results from our laboratory have shown Hepatocyte Growth Factor/MET signaling to be essential for the establishment of infection in hepatocytes. We discuss the potential use of this pathway in the prophylaxis of malaria infection.
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17
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Highly Efficient Synthesis of 2-Aryl-3-methoxyacrylates via Suzuki-Miyaura Coupling Reaction. B KOREAN CHEM SOC 2006. [DOI: 10.5012/bkcs.2006.27.2.191] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Kapoor VK, Kumar K. Recent Advances in the Search for Newer Antimalarial Agents. PROGRESS IN MEDICINAL CHEMISTRY 2005; 43:189-237. [PMID: 15850826 DOI: 10.1016/s0079-6468(05)43006-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Vijay K Kapoor
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
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Vial HJ, Wein S, Farenc C, Kocken C, Nicolas O, Ancelin ML, Bressolle F, Thomas A, Calas M. Prodrugs of bisthiazolium salts are orally potent antimalarials. Proc Natl Acad Sci U S A 2004; 101:15458-63. [PMID: 15492221 PMCID: PMC523447 DOI: 10.1073/pnas.0404037101] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2004] [Accepted: 09/01/2004] [Indexed: 11/18/2022] Open
Abstract
We created neutral antimalarial prodrugs that deliver bisthiazolium compounds with antimalarial activity in the nanomolar range. These drugs primarily affect early intraerythrocytic stages through rapid, nonreversible cytotoxicity. The compounds are suitable for both parenteral and oral use and plasma promotes rapid conversion of the prodrug into the drug. We demonstrate that very low doses offer protection in a murine model of malaria. The drugs show great potential for curing high parasitemia with short-course treatments. Oral administration of the TE3 prodrug completely cures Plasmodium cynomolgi infection in rhesus monkeys. The drugs specifically accumulate inside infected erythrocytes, block phosphatidylcholine biosynthesis, and interact with hemozoin. To our knowledge, this class of compounds represents one of the most potent antimalarials tested to date. These unique properties signal a promising future for this class of antimalarial.
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Affiliation(s)
- Henri J Vial
- Unité Mixte de Recherche 5539, Centre National de la Recherche Scientifique/Université Montpellier II, Case 107, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.
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20
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Ko H, Kim E, Park JE, Kim D, Kim S. Total Synthesis of Pancratistatin Relying on the [3,3]-Sigmatropic Rearrangement. J Org Chem 2003; 69:112-21. [PMID: 14703386 DOI: 10.1021/jo035371n] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new total synthesis of the antitumor alkaloid, pancratistatin (1), has been accomplished from readily available starting materials. Claisen rearrangement of the racemic dihydropyranethylene 17 was employed to construct the A and C rings with the appropriate stereochemistry. In addition, the Ireland-Claisen rearrangement of the enantiomerically pure 9 followed by ring-closing metathesis provided the important intermediate 24, thus implying that our approach could yield the enantioselective synthesis of (+)-pancratistatin. With the appropriately functionalized cyclohexene 24, stereo- and regiocontrolled functional group interchanges, such as iodolactonization, dihydroxylations, and a cyclic sulfate elimination reaction, facilitated the production of the target natural product.
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Affiliation(s)
- Hyojin Ko
- Natural Products Research Institute, College of Pharmacy, Seoul National University, 28 Yungun, Jongro, Seoul 110-460, Korea
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21
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Abstract
The morbidity and mortality associated with malaria have spurred efforts to find novel antimalarial agents with improved potency and selectivity. Leads for agents continue to be obtained from natural sources (plants and microorganisms) and chemical syntheses. Screening of commercial or specialized databases have also yielded promising leads. The structural diversity of compounds with good (micromolar and lower) activity point to the considerable tolerance for different structural elements in the "antimalarial pharmacophore." It may also be a reflection of the varied targets present in the plasmodia. The challenge in malaria chemotherapy is to find safe and selective agents whose potencies will not be compromised by plasmodial resistance. Modification of potential leads should also aim at improving "drug-like" character, viz. to ensure acceptable oral bioavailability. A review of the literature shows that there is a growing trend towards the development of target-specific antimalarial agents (for example, agents inhibiting plasmodial farnesyl transferase, cyclin dependent kinases, proteases, choline transport). An increasing number of reports focus on the development of chemosensitizers, agents that are capable of reversing plasmodial resistance.
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Affiliation(s)
- Mei-Lin Go
- Department of Pharmacy, National University of Singapore, Singapore.
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22
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Chapter 21. New therapies for malaria. ANNUAL REPORTS IN MEDICINAL CHEMISTRY 2003. [DOI: 10.1016/s0065-7743(03)38022-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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23
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24
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Uchiro H, Nagasawa K, Kotake T, Hasegawa D, Tomita A, Kobayashi S. The first synthesis and antifungal activities of 9-methoxystrobilurin-type β-substituted β-Methoxyacrylate. Bioorg Med Chem Lett 2002; 12:2821-4. [PMID: 12270154 DOI: 10.1016/s0960-894x(02)00625-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The first synthesis of 9-methoxystrobilurin-type beta-substituted MOAs was successfully achieved. A chiral oudemansin-type beta-substituted MOA was also synthesized utilizing Mukaiyama's asymmetric aldol reaction. Antifungal activities of the synthesized compounds against several representative fungi were examined by disk-diffusion assay. As a result, unique and superior antifungal properties of 9-methoxystrobilurin-type beta-substituted MOAs compared with those of oudemansin-type analogue were clearly revealed.
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Affiliation(s)
- Hiromi Uchiro
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 12 Ichigayafunagawara-machi, Shinjuku-ku, Tokyo, Japan
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25
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Selassie CD, Garg R, Kapur S, Kurup A, Verma RP, Mekapati SB, Hansch C. Comparative QSAR and the radical toxicity of various functional groups. Chem Rev 2002; 102:2585-605. [PMID: 12105936 DOI: 10.1021/cr940024m] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cynthia D Selassie
- Chemistry Department, Pomona College, 645 North College Avenue, Claremont, California 91711, USA
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26
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Denmark SE, Pan W. Efficient and stereoselective cross-coupling with highly substituted alkenylsilanols. J Organomet Chem 2002. [DOI: 10.1016/s0022-328x(02)01268-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Abstract
A new total synthesis of the antitumor alkaloids, pancratistatin (1), has been accomplished from readily available staring materials. The Claisen rearrangement of dihydropyranethylene 5 was employed to construct the A and C rings. Stereo- and regiocontrolled functional group interchange, such as iodolactonization, dihydroxylations, and a cyclic sulfate elimination reaction, allows for the production of the target natural product. [reaction: see text]
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Affiliation(s)
- Sanghee Kim
- Natural Products Research Institute, Seoul National University, 28 Yungun, Jongro, Seoul 110-460, Korea
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28
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Hansch C, Hoekman D, Leo A, Weininger D, Selassie CD. Chem-bioinformatics: comparative QSAR at the interface between chemistry and biology. Chem Rev 2002; 102:783-812. [PMID: 11890757 DOI: 10.1021/cr0102009] [Citation(s) in RCA: 184] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Corwin Hansch
- Department of Chemistry, Pomona College, Claremont, California 91711, USA
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Abstract
Continued and sustainable improvements in antimalarial medicines through focused research and development are essential for the world's future ability to treat and control malaria. Unfortunately, malaria is a disease of poverty, and despite a wealth of scientific knowledge there is insufficient market incentive to generate the competitive, business-driven industrial antimalarial drug research and development that is normally needed to deliver new products. Mechanisms of partnering with industry have been established to overcome this obstacle and to open up and build on scientific opportunities for improved chemotherapy in the future.
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30
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Facile and stereoselective synthesis of (E)-vinyl bromides by microwave-induced reaction of 1,1-dibromoalkenes using a diethyl phosphonate/EtONa/EtOH system. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00013-3] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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31
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Chapter 10. New therapies for parasitic infection. ANNUAL REPORTS IN MEDICINAL CHEMISTRY 2001. [DOI: 10.1016/s0065-7743(01)36050-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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Abstract
In this report we discuss some of the surprising ways phenols interact in vivo and how some of their toxic activity can be understood in terms of QSAR and in fact can be related via electronic terms to be similar to processes of simple chemical reactions. A simple two-term QSAR is found to be a good predictor of estrogenic toxicity. However, it is also shown that even the simplest of phenols can yield quite unexpected results than can be elucidated via QSAR. We still have a long way to go before we can predict under what conditions a phenol will produce toxic effects such as cancer and how much phytophenols one can consume before reaping a toxic reaction.
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Affiliation(s)
- R Garg
- Department of Chemistry, Pomona College, 645N College Avenue, Claremont, CA 91711, USA
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