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Giesen JA, Grayson SM. Selective monobenzylation of 2,2-bis(hydroxymethyl)propionic acid (bis-MPA) to yield an AB linear monomer and analogous linear oligomers. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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2
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Synthesis and Kinetic evaluation of an azido analogue of methylerythritol phosphate: a Novel Inhibitor of E. coli YgbP/IspD. Sci Rep 2018; 8:17892. [PMID: 30559447 PMCID: PMC6297244 DOI: 10.1038/s41598-018-35586-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 11/05/2018] [Indexed: 12/04/2022] Open
Abstract
As multidrug resistant pathogenic microorganisms are a serious health menace, it is crucial to continuously develop novel medicines in order to overcome the emerging resistance. The methylerythritol phosphate pathway (MEP) is an ideal target for antimicrobial development as it is absent in humans but present in most bacteria and in the parasite Plasmodium falciparum. Here, we report the synthesis and the steady-state kinetics of a novel potent inhibitor (MEPN3) of Escherichia coli YgbP/IspD, the third enzyme of the MEP pathway. MEPN3 inhibits E. coli YgbP/IspD in mixed type mode regarding both substrates. Interestingly, MEPN3 shows the highest inhibitory activity when compared to known inhibitors of E. coli YgbP/IspD. The mechanism of this enzyme was also studied by steady-state kinetic analysis and it was found that the substrates add to the enzyme in sequential manner.
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Rajesh N, Sundararaju B. Nickel-catalyzed C−H bond Alkoxylation of Amides with Alcohols. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800286] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nimmakuri Rajesh
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur Uttar Pradesh 208016 India
| | - Basker Sundararaju
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur Uttar Pradesh 208016 India
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Fedyushin PA, Peshkov RY, Panteleeva EV, Tretyakov EV, Beregovaya IV, Gatilov YV, Shteingarts VD. Purposeful regioselectivity control of the Birch reductive alkylation of biphenyl-4-carbonitrile. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.12.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Morgen M, Jöst C, Malz M, Janowski R, Niessing D, Klein CD, Gunkel N, Miller AK. Spiroepoxytriazoles Are Fumagillin-like Irreversible Inhibitors of MetAP2 with Potent Cellular Activity. ACS Chem Biol 2016; 11:1001-11. [PMID: 26686773 DOI: 10.1021/acschembio.5b00755] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Methionine aminopeptidases (MetAPs) are responsible for the cotranslational cleavage of initiator methionines from nascent proteins. The MetAP2 subtype is up-regulated in many cancers, and selective inhibition of MetAP2 suppresses both vascularization and growth of tumors in animal models. The natural product fumagillin is a selective and potent irreversible inhibitor of MetAP2, and semisynthetic derivatives of fumagillin have shown promise in clinical studies for the treatment of cancer, and, more recently, for obesity. Further development of fumagillin derivatives has been complicated, however, by their generally poor pharmacokinetics. In an attempt to overcome these limitations, we developed an easily diversifiable synthesis of a novel class of MetAP2 inhibitors that were designed to mimic fumagillin's molecular scaffold but have improved pharmacological profiles. These substances were found to be potent and selective inhibitors of MetAP2, as demonstrated in biochemical enzymatic assays against three MetAP isoforms. Inhibitors with the same relative and absolute stereoconfiguration as fumagillin displayed significantly higher activity than their diastereomeric and enantiomeric isomers. X-ray crystallographic analysis revealed that the inhibitors covalently modify His231 in the MetAP2 active site via ring-opening of a spiroepoxide. Biochemically active substances inhibited the growth of endothelial cells and a MetAP2-sensitive cancer cell line, while closely related inactive isomers had little effect on the proliferation of either cell type. These effects correlated with altered N-terminal processing of the protein 14-3-3-γ. Finally, selected substances were found to have improved stabilities in mouse plasma and microsomes relative to the clinically investigated fumagillin derivative beloranib.
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Affiliation(s)
- Michael Morgen
- Cancer
Drug Development Group, German Cancer Research Center (DKFZ), Im Neunheimer
Feld 280, D-69120 Heidelberg, Germany
| | - Christian Jöst
- Medicinal
Chemistry, Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University, Im Neuenheimer Feld 364, D-69120 Heidelberg, Germany
| | - Mona Malz
- Cancer
Drug Development Group, German Cancer Research Center (DKFZ), Im Neunheimer
Feld 280, D-69120 Heidelberg, Germany
| | - Robert Janowski
- Institute
of Structural Biology, Helmholtz Zentrum München, German Research Center for Environmental Health (HMGU), D-85764 Neuherberg, Germany
| | - Dierk Niessing
- Institute
of Structural Biology, Helmholtz Zentrum München, German Research Center for Environmental Health (HMGU), D-85764 Neuherberg, Germany
- Biomedical Center of the Ludwig-Maximilians-Universität München, D-82152 Planegg-Martinsried, Germany
| | - Christian D. Klein
- Medicinal
Chemistry, Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University, Im Neuenheimer Feld 364, D-69120 Heidelberg, Germany
| | - Nikolas Gunkel
- Cancer
Drug Development Group, German Cancer Research Center (DKFZ), Im Neunheimer
Feld 280, D-69120 Heidelberg, Germany
| | - Aubry K. Miller
- Cancer
Drug Development Group, German Cancer Research Center (DKFZ), Im Neunheimer
Feld 280, D-69120 Heidelberg, Germany
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8
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Stankevič M, Wójcik K, Jaklińska M, Pietrusiewicz KM. In Situ Dearomatisation/Alkylation of Arylphosphane Derivatives. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200096] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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9
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Bhat S, Shim JS, Zhang F, Chong CR, Liu JO. Substituted oxines inhibit endothelial cell proliferation and angiogenesis. Org Biomol Chem 2012; 10:2979-92. [PMID: 22391578 DOI: 10.1039/c2ob06978d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two substituted oxines, nitroxoline (5) and 5-chloroquinolin-8-yl phenylcarbamate (22), were identified as hits in a high-throughput screen aimed at finding new anti-angiogenic agents. In a previous study, we have elucidated the molecular mechanism of antiproliferative activity of nitroxoline in endothelial cells, which comprises of a dual inhibition of type 2 human methionine aminopeptidase (MetAP2) and sirtuin 1 (SIRT1). Structure-activity relationship study (SAR) of nitroxoline offered many surprises where minor modifications yielded oxine derivatives with increased potency against human umbilical vein endothelial cells (HUVEC), but with entirely different as yet unknown mechanisms. For example, 5-nitrosoquinolin-8-ol (33) inhibited HUVEC growth with sub-micromolar IC(50), but did not affect MetAP2 or MetAP1, and it only showed weak inhibition against SIRT1. Other sub-micromolar inhibitors were derivatives of 5-aminoquinolin-8-ol (34) and 8-sulfonamidoquinoline (32). A sulfamate derivative of nitroxoline (48) was found to be more potent than nitroxoline with the retention of activities against MetAP2 and SIRT1. The bioactivity of the second hit, micromolar HUVEC and MetAP2 inhibitor carbamate 22 was improved further with an SAR study culminating in carbamate 24 which is a nanomolar inhibitor of HUVEC and MetAP2.
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Affiliation(s)
- Shridhar Bhat
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA
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Sridharan V, Menéndez JC. Cerium(IV) Ammonium Nitrate as a Catalyst in Organic Synthesis. Chem Rev 2010; 110:3805-49. [DOI: 10.1021/cr100004p] [Citation(s) in RCA: 211] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vellaisamy Sridharan
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - J. Carlos Menéndez
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
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Arico-Muendel CC, Benjamin DR, Caiazzo TM, Centrella PA, Contonio BD, Cook CM, Doyle EG, Hannig G, Labenski MT, Searle LL, Lind K, Morgan BA, Olson G, Paradise CL, Self C, Skinner SR, Sluboski B, Svendsen JL, Thompson CD, Westlin W, White KF. Carbamate analogues of fumagillin as potent, targeted inhibitors of methionine aminopeptidase-2. J Med Chem 2010; 52:8047-56. [PMID: 19929003 DOI: 10.1021/jm901260k] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Inhibition of methionine aminopeptidase-2 (MetAP2) represents a novel approach to antiangiogenic therapy. We describe the synthesis and activity of fumagillin analogues that address the pharmacokinetic and safety liabilities of earlier candidates in this compound class. Two-step elaboration of fumagillol with amines yielded a diverse series of carbamates at C6 of the cyclohexane spiroepoxide. The most potent of these compounds exhibited subnanomolar inhibition of cell proliferation in HUVEC and BAEC assays. Although a range of functionalities were tolerated at this position, alpha-trisubstituted amines possessed markedly decreased inhibitory activity, and this could be rationalized by modeling based on the known fumagillin-MetAP2 crystal structure. The lead compound resulting from these studies, (3R,4S,5S,6R)-5-methoxy-4-((2R,3R)-2-methyl-3-(3-methylbut-2-enyl)oxiran-2-yl)-1-oxaspiro[2.5]octan-6-yl (R)-1-amino-3-methyl-1-oxobutan-2-ylcarbamate, (PPI-2458), demonstrated an improved pharmacokinetic profile relative to the earlier clinical candidate TNP-470, and has advanced into phase I clinical studies in non-Hodgkin's lymphoma and solid cancers.
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Maulide N, Vanherck JC, Gautier A, Markó IE. Mild and neutral deprotections catalyzed by cerium(IV) ammonium nitrate. Acc Chem Res 2007; 40:381-92. [PMID: 17469793 DOI: 10.1021/ar600062b] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The development of a novel, chemoselective, and catalytic deprotection methodology that proceeds under mild and neutral conditions is described, and its mechanism of action is analyzed in some detail. The scope, limitations, and advantages of this protocol are discussed. Selected applications in synthesis are also highlighted.
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Affiliation(s)
- Nuno Maulide
- Université catholique de Louvain, Département de Chimie, Bâtiment Lavoisier, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
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Batova A, Lam T, Wascholowski V, Yu AL, Giannis A, Theodorakis EA. Synthesis and evaluation of caged Garcinia xanthones. Org Biomol Chem 2007; 5:494-500. [PMID: 17252132 DOI: 10.1039/b612903j] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Inspired by the combination of unique structure and potent bioactivities exhibited by several family members of the caged Garcinia xanthones, we developed a synthesis of simplified analogues that maintain the overall caged motif. The caged structure of these compounds was constructed via a site-selective Claisen/Diels-Alder reaction cascade. We found that the fully substituted caged structure, in which are included the C18 and C23 geminal methyl groups, is necessary to maintain bioactivity. Analogue had comparable activity to the natural products of this family, such as gambogic acid. These compounds exhibit cytotoxicity in a variety of tumor cell lines at low micromolar concentrations and were found to induce apoptosis in HUVE cells. In addition, studies with HL-60 and HL-60/ADR cells indicate that these compounds are not affected by the mechanisms of multidrug resistance, conferred by P glycoprotein expression, typical of relapsed cancers and thus represent a new and potent pharmacophore.
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Affiliation(s)
- Ayse Batova
- Department of Pediatrics/Hematology-Oncology, University of California, San Diego, 200 West Arbor Drive, San Diego, CA 92103-8447, USA.
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Brummond KM, McCabe JM. The allenic Alder-ene reaction: constitutional group selectivity and its application to the synthesis of ovalicin. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.06.115] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Hansen JA, Smith CR, Linder RJ, Huffman JC. Diastereoselective sulfur ylide promoted aldol/epoxidation. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.07.141] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Lu J, Chong CR, Hu X, Liu JO. Fumarranol, a Rearranged Fumagillin Analogue That Inhibits Angiogenesis in Vivo. J Med Chem 2006; 49:5645-8. [PMID: 16970390 DOI: 10.1021/jm060559v] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The fumagillin family of natural products inhibits angiogenesis through the irreversible inhibition of the type 2 methionine aminopeptidase (MetAP2). Herein is reported a novel fumagillin analogue named fumarranol. It is shown that, like fumagillin, fumarranol selectively inhibits MetAP2 and endothelial cell proliferation. It is also active in a mouse model of angiogenesis in vivo. Unlike TNP-470, fumarranol does not covalently bind to MetAP2. Fumarranol may serve as a lead for a new class of angiogenesis inhibitors.
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Affiliation(s)
- Jun Lu
- Department of Pharmacology and Molecular Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
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Yamaguchi J, Toyoshima M, Shoji M, Kakeya H, Osada H, Hayashi Y. Concise Enantio- and Diastereoselective Total Syntheses of Fumagillol, RK-805, FR65814, Ovalicin, and 5-Demethylovalicin. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200502826] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Yamaguchi J, Toyoshima M, Shoji M, Kakeya H, Osada H, Hayashi Y. Concise Enantio- and Diastereoselective Total Syntheses of Fumagillol, RK-805, FR65814, Ovalicin, and 5-Demethylovalicin. Angew Chem Int Ed Engl 2006; 45:789-93. [PMID: 16365904 DOI: 10.1002/anie.200502826] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Junichiro Yamaguchi
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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Abstract
This review covers the isolation, structural determination, synthesis and chemical and microbiological transformations of natural sesquiterpenoids. The literature from January to December 2005 is reviewed,and 386 references are cited.
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Affiliation(s)
- Braulio M Fraga
- Instituto de Productos Naturales y Agrobiología, CSIC, 38206, La Laguna, Tenerife, Canary Islands, Spain.
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20
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Takahashi S, Hishinuma N, Koshino H, Nakata T. Synthesis of Ovalicin Starting from d-Mannose. J Org Chem 2005; 70:10162-5. [PMID: 16292863 DOI: 10.1021/jo051686m] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] A new synthesis of epoxyketone 22 is described that is a key intermediate in Barton's synthesis of ovalicin (2), a powerful anti-angiogenetic inhibitor. The key process for the construction of 22 was ring-closing metathesis of olefins 11 and 12 obtained from 2,3:5,6-di-O-isopropylidene-alpha-D-mannofuranose (4) and regioselective desilylation of tri-TES ether 19. Furthermore, an alternative stereoselective route from 22 into 2 has also been developed, and the overall yield of 2 from 4 was 10.0%.
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Affiliation(s)
- Shunya Takahashi
- RIKEN (The Institute of Physical and Chemical Research), Wako-shi, Saitama, 351-0198, Japan.
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