1
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Prashanth S, Adarsh D, Bantu R, Sridhar B, Subba Reddy B. Cu(II)-catalyzed synthesis of 2,4,5-trisubstituted oxazoles. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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2
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Maryška M, Svobodová L, Dehaen W, Hrabinová M, Rumlová M, Soukup O, Kuchař M. Heterocyclic Cathinones as Inhibitors of Kynurenine Aminotransferase II-Design, Synthesis, and Evaluation. Pharmaceuticals (Basel) 2021; 14:ph14121291. [PMID: 34959692 PMCID: PMC8708382 DOI: 10.3390/ph14121291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/24/2021] [Accepted: 12/08/2021] [Indexed: 11/16/2022] Open
Abstract
Kynurenic acid is a neuroprotective metabolite of tryptophan formed by kynurenine aminotransferase (KAT) catalyzed transformation of kynurenine. However, its high brain levels are associated with cognitive deficit and with the pathophysiology of schizophrenia. Although several classes of KAT inhibitors have been published, the search for new inhibitor chemotypes is crucial for the process of finding suitable clinical candidates. Therefore, we used pharmacophore modeling and molecular docking, which predicted derivatives of heterocyclic amino ketones as new potential irreversible inhibitors of kynurenine aminotransferase II. Thiazole and triazole-based amino ketones were synthesized within a SAR study and their inhibitory activities were evaluated in vitro. The observed activities confirmed our computational model and, moreover, the best compounds showed sub-micromolar inhibitory activity with 2-alaninoyl-5-(4-fluorophenyl)thiazole having IC50 = 0.097 µM.
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Affiliation(s)
- Michal Maryška
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic; (M.M.); (L.S.)
- National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic
| | - Lucie Svobodová
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic; (M.M.); (L.S.)
| | - Wim Dehaen
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Department of Informatics and Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic;
| | - Martina Hrabinová
- Biomedical Research Center, University Hospital Hradec Králové, Sokolská 581, 50005 Hradec Kralové, Czech Republic; (M.H.); (O.S.)
- Department of Toxicology and Military Pharmacy, University of Defense, Třebešská 1575, 50005 Hradec Králové, Czech Republic
| | - Michaela Rumlová
- Department of Biotechnology, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic;
| | - Ondřej Soukup
- Biomedical Research Center, University Hospital Hradec Králové, Sokolská 581, 50005 Hradec Kralové, Czech Republic; (M.H.); (O.S.)
- Department of Toxicology and Military Pharmacy, University of Defense, Třebešská 1575, 50005 Hradec Králové, Czech Republic
| | - Martin Kuchař
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic; (M.M.); (L.S.)
- National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic
- Correspondence: ; Tel.: +420-220-444-431
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3
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Conversions of sulfone-containing vinyl azides to vinyl triazoles and enamides. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.131933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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4
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Pal R, O'Brien SC, Willis MC. α-Amidoaldehydes as Substrates in Rhodium-Catalyzed Intermolecular Alkyne Hydroacylation: The Synthesis of α-Amidoketones. Chemistry 2020; 26:11710-11714. [PMID: 32449532 PMCID: PMC7540332 DOI: 10.1002/chem.202002478] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Indexed: 11/25/2022]
Abstract
We show that readily available α-amidoaldehydes are effective substrates for intermolecular Rh-catalyzed alkyne hydroacylation reactions. The catalyst [Rh(dppe)(C6 H5 F)][BArF 4 ] provides good reactivity, and allows a broad range of aldehydes and alkynes to be used as substrates, delivering α-amidoketone products. High yields and high levels of regioselectivity are achieved. The use of α-amidoaldehydes as substrates establishes that 1,4-dicarbonyl motifs can be used as controlling groups in Rh-catalyzed hydroacylation reactions.
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Affiliation(s)
- Ritashree Pal
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUnited Kingdom
| | - Sean C. O'Brien
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUnited Kingdom
| | - Michael C. Willis
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUnited Kingdom
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5
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A novel synthetic method of 2,4-disubstituted oxazoles using carboxylic acid-derived Bu2Sn[OC(O)R]2. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151983] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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De A, Santra S, Zyryanov GV, Majee A. Self-Catalyzed Rapid Synthesis of N-Acylated/ N-Formylated α-Aminoketones and N-Hydroxymethylated Formamides from 3-Aryl-2 H-Azirines and 2-Me/Ph-3-Aryl-2 H-Azirines. Org Lett 2020; 22:3926-3930. [PMID: 32356998 DOI: 10.1021/acs.orglett.0c01206] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A rapid and effective method has been established for the synthesis of N-acylated α-aminoketone derivatives by the reaction of 3-aryl-2H-azirines and highly substituted 2-Me/Ph-3-aryl-2H-azirines with various carboxylic acids under ambient air within 10 min at room temperature. N-Trifluoroacetylated α-aminoketones with different substituents have been reported in the presence of trifluoroacetic acid. This protocol is equally effective to synthesize N-formylated α-aminoketone and N-hydroxymethylated formamide derivatives.
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Affiliation(s)
- Aramita De
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Sougata Santra
- Department of Organic and Biomolecular Chemistry, Chemical Engineering Institute, Ural Federal University, 19 Mira Street, 620002 Yekaterinburg, Russian Federation
| | - Grigory V Zyryanov
- Department of Organic and Biomolecular Chemistry, Chemical Engineering Institute, Ural Federal University, 19 Mira Street, 620002 Yekaterinburg, Russian Federation.,I. Ya. Postovskiy Institute of Organic Synthesis, Ural Division of the Russian Academy of Sciences, 22 Sofi Kovalevskoy Street, 620219 Yekaterinburg, Russian Federation
| | - Adinath Majee
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
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7
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Pandey KP, Khan ZA, Golani LK, Mondal P, Mian Y, Rashid F, Tiruveedhula VVNPB, Knutson DE, Sharmin D, Ahmed T, Rezvanian S, Zahn NM, Arnold LA, Witkin JM, Cook JM. Design, synthesis and characterization of novel gamma‑aminobutyric acid type A receptor ligands. ARKIVOC 2020; 2020:242-256. [PMID: 33642954 DOI: 10.24820/ark.5550190.p011.398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Antinociceptive ligand HZ-166 is a GABAA α2/α3 receptor subtype-selective potentiator. It has been shown to exhibit anxiolytic-like effects in rodent and rhesus monkeys, as well as reduced sedative/ataxic liabilities. In order to improve the metabolic stability of HZ-166, the ethyl ester moiety was bioisosterically replaced with 2,4-disubstituted oxazoles and oxazolines. The new analogs of HZ-166 were synthesized, characterized, and evalutated for their biological activity and docked in the human full-length heteromeric α1β3γ2L GABAA receptor subtype CyroEM structure (6HUO). Importantly no sedation nor ataxia was observed on the rotorod for LKG-I-70 (6) or KPP-III-51 (6c) at 100 and 120 mg/kg, respectively. These was also no loss of righting response for either ligand.
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Affiliation(s)
- Kamal P Pandey
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Zubair Ahmed Khan
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Lalit K Golani
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Prithu Mondal
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Yeunus Mian
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Farjana Rashid
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - V V N Phani Babu Tiruveedhula
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Daniel E Knutson
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Dishary Sharmin
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Taukir Ahmed
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Sepideh Rezvanian
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Nicolas M Zahn
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Leggy A Arnold
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - Jeffrey M Witkin
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
| | - James M Cook
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
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8
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Kumar SV, Acharya A, Ila H. Synthesis of 2,4,5-Trisubstituted Oxazoles with Complementary Regioselectivity from α-Oxoketene Dithioacetals and β-(Methylthio)-β-(het)aryl-2-propenones. J Org Chem 2018; 83:6607-6622. [DOI: 10.1021/acs.joc.8b00900] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Siripuram Vijay Kumar
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research(JNCASR), Jakkur, Bangalore 560064, India
| | - Anand Acharya
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research(JNCASR), Jakkur, Bangalore 560064, India
| | - Hiriyakkanavar Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research(JNCASR), Jakkur, Bangalore 560064, India
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9
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Kaur N. Perspectives of ionic liquids applications for the synthesis of five- and six-memberedO,N-heterocycles. SYNTHETIC COMMUN 2018. [DOI: 10.1080/00397911.2017.1406521] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali University, Banasthali, Rajasthan, India
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10
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Rahimzadeh G, Kianmehr E, Mahdavi M. Improvement of the Van Leusen reaction in the presence of β-cyclodextrin: a green and efficient synthesis of oxazoles in water. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2017. [DOI: 10.1515/znb-2017-0005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
An efficient approach for the synthesis of oxazoles through the Van Leusen reaction in the presence of β-cyclodextrin is described. In aqueous medium using β-cyclodextrin as a supramolecular catalyst, tosylmethyl isocyanide was deprotonated by triethylamine and subsequently underwent an addition/cyclization reaction with aldehydes to produce corresponding oxazoles in excellent yields. This protocol improves the Van Leusen reaction with the use of catalytic amounts of base at low temperature in green media.
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Affiliation(s)
- Golnaz Rahimzadeh
- School of Chemistry, College of Science , University of Tehran , Tehran , Iran
| | - Ebrahim Kianmehr
- School of Chemistry, College of Science , University of Tehran , Tehran , Iran
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute , Tehran University of Medical Sciences , Tehran , Iran , Fax: +98-21-6640-6757
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11
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Essig S, Schmalzbauer B, Bretzke S, Scherer O, Koeberle A, Werz O, Müller R, Menche D. Predictive Bioinformatic Assignment of Methyl-Bearing Stereocenters, Total Synthesis, and an Additional Molecular Target of Ajudazol B. J Org Chem 2016; 81:1333-57. [DOI: 10.1021/acs.joc.5b02844] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Sebastian Essig
- Institut
für Organische Chemie, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Björn Schmalzbauer
- Kekulé-Institut
für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Sebastian Bretzke
- Institut
für Organische Chemie, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Olga Scherer
- Institute
of Pharmacy, Friedrich Schiller Universität Jena, Philosophenweg
14, 07743 Jena, Germany
| | - Andreas Koeberle
- Institute
of Pharmacy, Friedrich Schiller Universität Jena, Philosophenweg
14, 07743 Jena, Germany
| | - Oliver Werz
- Institute
of Pharmacy, Friedrich Schiller Universität Jena, Philosophenweg
14, 07743 Jena, Germany
| | - Rolf Müller
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS) and Institut
for Pharmaceutical Biotechnology, Universität des Saarlandes, C 2.3, 66123 Saarbrücken, Germany
| | - Dirk Menche
- Kekulé-Institut
für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
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12
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Kim Y, Pak HK, Rhee YH, Park J. Catalytic transformation of esters of 1,2-azido alcohols into α-amido ketones. Chem Commun (Camb) 2016; 52:6549-52. [DOI: 10.1039/c6cc02063a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The esters of 1,2-azido alcohols were transformed into α-amido ketones without external oxidants through the Ru-catalyzed formation of N–H imines with the liberation of N2 followed by intramolecular migration of the acyl moiety.
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Affiliation(s)
- Yongjin Kim
- Department of Chemistry
- POSTECH (Pohang University of Science and Technology)
- Pohang 790-784
- Korea
| | - Han Kyu Pak
- Department of Chemistry
- POSTECH (Pohang University of Science and Technology)
- Pohang 790-784
- Korea
| | - Young Ho Rhee
- Department of Chemistry
- POSTECH (Pohang University of Science and Technology)
- Pohang 790-784
- Korea
| | - Jaiwook Park
- Department of Chemistry
- POSTECH (Pohang University of Science and Technology)
- Pohang 790-784
- Korea
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13
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Huchet QA, Kuhn B, Wagner B, Kratochwil NA, Fischer H, Kansy M, Zimmerli D, Carreira EM, Müller K. Fluorination Patterning: A Study of Structural Motifs That Impact Physicochemical Properties of Relevance to Drug Discovery. J Med Chem 2015; 58:9041-60. [PMID: 26523333 DOI: 10.1021/acs.jmedchem.5b01455] [Citation(s) in RCA: 152] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of a collection of 3-substituted indole derivatives incorporating partially fluorinated n-propyl and n-butyl groups is described along with an in-depth study of the effects of various fluorination patterns on their properties, such as lipophilicity, aqueous solubility, and metabolic stability. The experimental observations confirm predictions of a marked lipophilicity decrease imparted by a vic-difluoro unit when compared to the gem-difluoro counterparts. The data involving the comparison of the two substitution patterns is expected to benefit molecular design in medicinal chemistry and, more broadly, in life as well as materials sciences.
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Affiliation(s)
- Quentin A Huchet
- Laboratorium für Organische Chemie, ETH Zürich , Vladimir Prelog Weg 3 HCI H335, CH-8093 Zürich, Switzerland
| | - Bernd Kuhn
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche AG , Grenzacherstrasse 124, CH-4070 Basel, Switzerland
| | - Björn Wagner
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche AG , Grenzacherstrasse 124, CH-4070 Basel, Switzerland
| | - Nicole A Kratochwil
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche AG , Grenzacherstrasse 124, CH-4070 Basel, Switzerland
| | - Holger Fischer
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche AG , Grenzacherstrasse 124, CH-4070 Basel, Switzerland
| | - Manfred Kansy
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche AG , Grenzacherstrasse 124, CH-4070 Basel, Switzerland
| | - Daniel Zimmerli
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche AG , Grenzacherstrasse 124, CH-4070 Basel, Switzerland
| | - Erick M Carreira
- Laboratorium für Organische Chemie, ETH Zürich , Vladimir Prelog Weg 3 HCI H335, CH-8093 Zürich, Switzerland
| | - Klaus Müller
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche AG , Grenzacherstrasse 124, CH-4070 Basel, Switzerland
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14
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Wales SM, Hammer KA, Somphol K, Kemker I, Schröder DC, Tague AJ, Brkic Z, King AM, Lyras D, Riley TV, Bremner JB, Keller PA, Pyne SG. Synthesis and antimicrobial activity of binaphthyl-based, functionalized oxazole and thiazole peptidomimetics. Org Biomol Chem 2015; 13:10813-24. [PMID: 26349598 DOI: 10.1039/c5ob01638j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thirty two new binaphthyl-based, functionalized oxazole and thiazole peptidomimetics and over thirty five novel leucine-containing intermediate oxazoles and thiazoles were prepared in this study. This includes the first examples of the direct C-5 arylation of an amino acid dipeptide-derived oxazole. Moderate to excellent antibacterial activity was observed for all new compounds across Gram positive isolates with MICs ranging from 1-16 μg mL(-1). Results for Gram negative E. coli and A. baumannii were more variable, but MICs as low as 4 μg mL(-1) were returned for two examples. Significantly, the in vitro results with a fluoromethyl-oxazole derivative collectively represent the best obtained to date for a member of our binaphthyl peptide antimicrobials.
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Affiliation(s)
- Steven M Wales
- School of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia.
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15
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Imai S, Kikui H, Moriyama K, Togo H. One-pot preparation of 2,5-disubstituted and 2,4,5-trisubstituted oxazoles from aromatic ketones with molecular iodine, oxone, and trifluoromethanesulfonic acid in nitriles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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16
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Brodney MA, Beck EM, Butler CR, Barreiro G, Johnson EF, Riddell D, Parris K, Nolan CE, Fan Y, Atchison K, Gonzales C, Robshaw AE, Doran SD, Bundesmann MW, Buzon L, Dutra J, Henegar K, LaChapelle E, Hou X, Rogers BN, Pandit J, Lira R, Martinez-Alsina L, Mikochik P, Murray JC, Ogilvie K, Price L, Sakya SM, Yu A, Zhang Y, O'Neill BT. Utilizing structures of CYP2D6 and BACE1 complexes to reduce risk of drug-drug interactions with a novel series of centrally efficacious BACE1 inhibitors. J Med Chem 2015; 58:3223-52. [PMID: 25781223 PMCID: PMC4415909 DOI: 10.1021/acs.jmedchem.5b00191] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
![]()
In recent years, the first generation
of β-secretase (BACE1)
inhibitors advanced into clinical development for the treatment of
Alzheimer’s disease (AD). However, the alignment of drug-like
properties and selectivity remains a major challenge. Herein, we describe
the discovery of a novel class of potent, low clearance, CNS penetrant
BACE1 inhibitors represented by thioamidine 5. Further
profiling suggested that a high fraction of the metabolism (>95%)
was due to CYP2D6, increasing the potential risk for victim-based
drug–drug interactions (DDI) and variable exposure in the clinic
due to the polymorphic nature of this enzyme. To guide future design,
we solved crystal structures of CYP2D6 complexes with substrate 5 and its corresponding metabolic product pyrazole 6, which provided insight into the binding mode and movements between
substrate/inhibitor complexes. Guided by the BACE1 and CYP2D6 crystal
structures, we designed and synthesized analogues with reduced risk
for DDI, central efficacy, and improved hERG therapeutic margins.
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Affiliation(s)
| | | | | | | | - Eric F Johnson
- #The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92024, United States
| | | | | | | | - Ying Fan
- #The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92024, United States
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Aijia Yu
- ∇WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Yong Zhang
- ∇WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
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17
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Bui M, Hao X, Shin Y, Cardozo M, He X, Henne K, Suchomel J, McCarter J, McGee LR, San Miguel T, Medina JC, Mohn D, Tran T, Wannberg S, Wong J, Wong S, Zalameda L, Metz D, Cushing TD. Synthesis and SAR study of potent and selective PI3Kδ inhibitors. Bioorg Med Chem Lett 2015; 25:1104-9. [DOI: 10.1016/j.bmcl.2015.01.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 12/31/2014] [Accepted: 01/02/2015] [Indexed: 10/24/2022]
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18
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Ivkovic J, Lembacher-Fadum C, Breinbauer R. A rapid and efficient one-pot method for the reduction of N-protected α-amino acids to chiral α-amino aldehydes using CDI/DIBAL-H. Org Biomol Chem 2015; 13:10456-60. [DOI: 10.1039/c5ob01838b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N-Protected α-amino acids can be easily converted directly into chiral α-amino aldehydes in a one-pot procedure by activation with CDI followed by reduction with DIBAL-H.
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Affiliation(s)
- Jakov Ivkovic
- Institute of Organic Chemistry
- Graz University of Technology
- 8010 Graz
- Austria
| | | | - Rolf Breinbauer
- Institute of Organic Chemistry
- Graz University of Technology
- 8010 Graz
- Austria
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19
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Romero-Estudillo I, Batchu VR, Boto A. One-Pot Conversion of Amino Acids into 2,5-Disubstituted Oxazoles: No Metals Needed. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400496] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Martins MAP, Frizzo CP, Tier AZ, Moreira DN, Zanatta N, Bonacorso HG. Update 1 of: Ionic Liquids in Heterocyclic Synthesis. Chem Rev 2014; 114:PR1-70. [DOI: 10.1021/cr500106x] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Marcos A. P. Martins
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Clarissa P. Frizzo
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Aniele Z. Tier
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Dayse N. Moreira
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Nilo Zanatta
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Helio G. Bonacorso
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
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21
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Bailey JL, Sudini RR. Synthesis of 2,4- and 2,4,5-substituted oxazoles via a silver triflate mediated cyclization. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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22
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Šenica L, Grošelj U, Kasunič M, Kočar D, Stanovnik B, Svete J. Synthesis of Enaminone-Based Vinylogous Peptides. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402033] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Lewis RJ, Bernstein MA, Chang HF, Chapman D, Pemberton N. Enantiomeric purity determination by NMR: proving the purity of a single enantiomer. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.05.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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24
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Li X, Li C, Yin B, Li C, Liu P, Li J, Shi Z. DDQ-Induced Dehydrogenation of Heterocycles for CC Double Bond Formation: Synthesis of 2-Thiazoles and 2-Oxazoles. Chem Asian J 2013; 8:1408-11. [DOI: 10.1002/asia.201300267] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 03/18/2013] [Indexed: 11/10/2022]
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25
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Liu X, Cheng R, Zhao F, Zhang-Negrerie D, Du Y, Zhao K. Direct β-Acyloxylation of Enamines via PhIO-Mediated Intermolecular Oxidative C–O Bond Formation and Its Application to the Synthesis of Oxazoles. Org Lett 2012; 14:5480-3. [DOI: 10.1021/ol3025583] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Xin Liu
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Ran Cheng
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Feifei Zhao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Daisy Zhang-Negrerie
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Kang Zhao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
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26
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Wendlandt AE, Stahl SS. Copper(ii)-mediated oxidative cyclization of enamides to oxazoles. Org Biomol Chem 2012; 10:3866-70. [DOI: 10.1039/c2ob25310k] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Marian C, Huang R, Borch RF. Design and synthesis of a potential SH2 domain inhibitor bearing a stereodiversified 1,4-cis-enediol scaffold. Tetrahedron 2011; 67:10216-10221. [PMID: 22199405 PMCID: PMC3244727 DOI: 10.1016/j.tet.2011.10.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Synthesis of a potential Src family SH2 domain inhibitor incorporating a 1,4-cis-enediol scaffold is reported. The synthetic route offers straightforward and highly selective access to the enediol and its associated chiral centers. Key steps include stereocontrolled syn-aldol coupling, amide alkynylation, and asymmetric ketone reduction.
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Affiliation(s)
- Christine Marian
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN 47907, USA
| | | | - Richard F. Borch
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN 47907, USA
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28
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Fu X, Huang P, Zhou G, Hu Y, Dong D. Divergent synthesis of fully substituted isoxazoles and spiro-fused pyrazolin-5-ones from cyclopropyl oximes. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.136] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Patel BH, Mason AM, Patel H, Coombes RC, Ali S, Barrett AGM. Conversion of α-amino acids into bioactive o-aminoalkyl resorcylates and related dihydroxyisoindolinones. J Org Chem 2011; 76:6209-17. [PMID: 21644524 DOI: 10.1021/jo2009356] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis of biologically active o-aminoalkyl resorcylates and related dihydroxyisoindolinones from functionalized α-amino acids without the use of phenolic protection is described. The key aminoalkyl-diketo-dioxinone intermediates were prepared utilizing a crossed Claisen condensation reaction in the presence of diethylzinc. The aromatic unit was constructed via late stage cyclization and aromatization, and subsequent modification provided the novel resorcylates which showed activity against a selection of receptors and kinases, including 5-HT and CDK.
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Affiliation(s)
- Bhavesh H Patel
- Department of Chemistry, Imperial College, London SW7 2AZ, England
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30
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A continuous fluorescence displacement assay for BioA: an enzyme involved in biotin biosynthesis. Anal Biochem 2011; 416:27-38. [PMID: 21621502 DOI: 10.1016/j.ab.2011.05.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 04/30/2011] [Accepted: 05/02/2011] [Indexed: 11/23/2022]
Abstract
Cofactor biosynthetic pathways represent a rich source of potential antibiotic targets. The second step in biotin biosynthesis is performed by BioA, a pyridoxal 5'-phosphate (PLP)-dependent enzyme. This enzyme has been confirmed as a candidate target in Mycobacterium tuberculosis; however, the current bioassay used to measure BioA activity is cumbersome and low throughput. Here we describe the design, development, and optimization of a continuous coupled fluorescence displacement assay to measure BioA activity. In this coupled assay, BioD converts the product of the BioA-catalyzed reaction into dethiobiotin, which is subsequently detected by displacement of a fluorescently labeled dethiobiotin probe from streptavidin. The assay was further adapted to a high-throughput screening format and validated against the LOPAC(1280) library.
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31
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Bigot A, Blythe J, Pandya C, Wagner T, Loiseleur O. DAST-Mediated Cyclization of α,α-Disubstituted-α-acylaminoketones: Efficient and Divergent Synthesis of Unprecedented Heterocycles. Org Lett 2010; 13:192-5. [DOI: 10.1021/ol102454e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Aurélien Bigot
- Syngenta Crop Protection Münchwilen AG, Schaffhauserestrasse, CH-4332 Stein, Switzerland
| | - Judith Blythe
- Syngenta Crop Protection Münchwilen AG, Schaffhauserestrasse, CH-4332 Stein, Switzerland
| | - Chirag Pandya
- Syngenta Crop Protection Münchwilen AG, Schaffhauserestrasse, CH-4332 Stein, Switzerland
| | - Trixie Wagner
- Syngenta Crop Protection Münchwilen AG, Schaffhauserestrasse, CH-4332 Stein, Switzerland
| | - Olivier Loiseleur
- Syngenta Crop Protection Münchwilen AG, Schaffhauserestrasse, CH-4332 Stein, Switzerland
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32
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Ferreira PM, Castanheira EM, Monteiro LS, Pereira G, Vilaça H. A mild high yielding synthesis of oxazole-4-carboxylate derivatives. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.09.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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33
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Shaabani A, Maleki A, Rezayan AH, Sarvary A. Recent progress of isocyanide-based multicomponent reactions in Iran. Mol Divers 2010; 15:41-68. [PMID: 20669047 DOI: 10.1007/s11030-010-9258-1] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2009] [Accepted: 07/02/2010] [Indexed: 11/24/2022]
Affiliation(s)
- Ahmad Shaabani
- Department of Chemistry, Shahid Beheshti University, P. O. Box 19396-4716, Tehran, Iran.
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34
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Misra NC, Ila H. 4-Bis(methylthio)methylene-2-phenyloxazol-5-one: Versatile Template for Synthesis of 2-Phenyl-4,5-functionalized Oxazoles. J Org Chem 2010; 75:5195-202. [DOI: 10.1021/jo100941f] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nimesh C. Misra
- Department of Chemistry, Indian Institute of Technology, Kanpur-208 016, India
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560 064, India
| | - H. Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560 064, India
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35
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Perrone MG, Bleve L, Santandrea E, Vitale P, Niso M, Scilimati A. The tertiary amine nitrogen atom of piperazine sulfonamides as a novel determinant of potent and selective beta3-adrenoceptor agonists. ChemMedChem 2010; 4:2080-97. [PMID: 19882697 DOI: 10.1002/cmdc.200900292] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Novel compounds were prepared in fair to good yields as human beta(3)-adrenoceptor (beta(3)-AR) agonists. In particular, aryloxypropanolamines 7 a-d (EC(50)=0.57-2.1 nM) and arylethanolamines 12 a,b,e (EC(50)=6.38-19.4 nM) were designed to explore the effects of modifications at the right-hand side of these molecules on their activity as beta(3)-AR agonists. Piperidine sulfonamides 15 a-c, e-g (EC(50)=6.1-36.2 nM) and piperazine sulfonamide derivatives 20-29 (EC(50)=1.79-49.3 nM) were examined as compounds bearing a non-aromatic linker on the right- and left-hand sides of the molecules. Some piperazine sulfonamides were found to be potent and selective beta(3)-AR agonists, even if the amine nitrogen atom is tertiary and not secondary, as is the case for all beta(3)-AR agonists reported so far. (S)-3-{4-{N-{4-{2-[2-Hydroxy-3-(4-hydroxyphenoxy)propylamino]ethyl}phenyl}sulfamoyl}phenoxy}propanoic acid (7 d; EC(50)=0.57 nM), (R)-N-{4-[2-(2-hydroxy-2-phenylethylamino)ethyl]phenyl}-4-(3-octylureido)benzenesulfonamide (12 e; EC(50)=6.38 nM), (R)-2-[1-(4-methoxyphenylsulfonyl)piperidin-4-ylamino]-1-phenylethanol (15 f; EC(50)=6.1 nM), and (S)-4-{2-hydroxy-3-[4-(4-methoxyphenylsulfonyl)piperazin-1-yl]propoxy}phenol (25; EC(50)=1.79 nM) were found to be the most potent beta(3)-AR agonists of the aryloxypropanolamine, arylethanolamine, piperidine sulfonamide, and piperazine sulfonamide classes, respectively. The two most potent compounds were identified as possible candidates for further development of beta(3)-AR agonists useful in the treatment of beta(3)-AR-mediated pathological conditions.
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Affiliation(s)
- Maria Grazia Perrone
- Dipartimento Farmaco-Chimico, Università degli Studi di Bari A. Moro, Via Orabona 4, 70125 Bari, Italy
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36
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Martins MAP, Frizzo CP, Moreira DN, Buriol L, Machado P. Solvent-Free Heterocyclic Synthesis. Chem Rev 2009; 109:4140-82. [DOI: 10.1021/cr9001098] [Citation(s) in RCA: 518] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marcos A. P. Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Clarissa P. Frizzo
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Dayse N. Moreira
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Lilian Buriol
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Pablo Machado
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
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37
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Pudelová N, Krchňák V. Multiplicity of diverse heterocycles from polymer-supported alpha-acylamino ketones. JOURNAL OF COMBINATORIAL CHEMISTRY 2009; 11:851-9. [PMID: 19689103 PMCID: PMC2748803 DOI: 10.1021/cc9000532] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polymer-supported alpha-acylamino ketones were transformed to seven types of structurally unrelated heterocyclic compounds. Syntheses involved variety of chemical routes and comprised diverse chemistries (C-C, C=C, C-N, C=N, and C-O bond formations). Different sizes of heterocycles (4-, 5-, 6-, and 7-membered rings) were prepared, including dihydro-pyrrol-2-ones, pyrazin-2-ones, dihydro-triazepin-6-ones, morpholin-3-ones, imidazoles, beta-lactams, and isoquinolin-1-ones. Further elaboration to fused ring systems was also documented.
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Affiliation(s)
- Nadĕžda Pudelová
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Center, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Viktor Krchňák
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Center, University of Notre Dame, Notre Dame, Indiana 46556, USA
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38
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Kocí J, Pudelová N, Krchnák V. Polymer-supported alpha-acylamino ketones: preparation and application in syntheses of 1,2,4-trisubstituted-1H-imidazoles. ACTA ACUST UNITED AC 2009; 11:397-402. [PMID: 19354277 DOI: 10.1021/cc800210q] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Polymer-supported alpha-acylamino ketones were prepared from resin-bound amines, bromoketones, and carboxylic acids. Selective monoalkylation of amines by bromoketones was carried out via 4-nitrobenzenesulfonamides. There was a striking difference in the reaction outcome between 2-Nos and 4-Nos derivatives. Alpha-acylamino ketones were converted to imidazoles. The cyclization was performed on resin, allowing further polymer-supported elaboration of imidazoles including synthesis of bis-heterocyclic compounds. A small combinatorial array of imidazoles was synthesized. Target compounds were prepared under mild conditions using commercially available building blocks for the introduction of three points of diversity.
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Affiliation(s)
- Jan Kocí
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Center, University of Notre Dame, Notre Dame, Indiana 46556, USA
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39
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Ferreira PMT, Monteiro LS, Pereira G. Synthesis of Substituted Oxazoles fromN-Acyl-β-hydroxyamino Acid Derivatives. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800602] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Lin J, Gerstenberger BS, Stessman NYT, Konopelski JP. Diazonamide support studies: stereoselective formation of the C10 chiral center in both the CDEFG and AEFG fragments. Org Lett 2008; 10:3969-72. [PMID: 18702502 DOI: 10.1021/ol8014336] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of both the AEFG macrolactam and the CDEFG bis-indole/tyrosine units found in the marine natural product diazonamide A is presented. Key to the success of the synthesis is the highly stereoselective direct C-arylation of an oxindole by an aryllead(IV) reagent derived from tyrosine.
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Affiliation(s)
- Jinzhen Lin
- Department of Chemistry and Biochemistry, University of California at Santa Cruz, Santa Cruz, California 95064, USA
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41
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Martins MAP, Frizzo CP, Moreira DN, Zanatta N, Bonacorso HG. Ionic liquids in heterocyclic synthesis. Chem Rev 2008; 108:2015-50. [PMID: 18543878 DOI: 10.1021/cr078399y] [Citation(s) in RCA: 480] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marcos A P Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil.
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42
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Affiliation(s)
- Marcos A. P. Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Clarissa P. Frizzo
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Dayse N. Moreira
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Helio G. Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
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43
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Pintér Á, Haberhauer G. Oxazole Cyclopeptides for Chirality Transfer inC3-Symmetric Octahedral Metal Complexes. European J Org Chem 2008. [DOI: 10.1002/ejoc.200701153] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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44
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McBriar MD, Clader JW, Chu I, Del Vecchio RA, Favreau L, Greenlee WJ, Hyde LA, Nomeir AA, Parker EM, Pissarnitski DA, Song L, Zhang L, Zhao Z. Discovery of amide and heteroaryl isosteres as carbamate replacements in a series of orally active gamma-secretase inhibitors. Bioorg Med Chem Lett 2007; 18:215-9. [PMID: 17988864 DOI: 10.1016/j.bmcl.2007.10.092] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2007] [Revised: 10/24/2007] [Accepted: 10/25/2007] [Indexed: 11/18/2022]
Abstract
The design of amide and heteroaryl amide isosteres as replacements for the carbamate substructure in previously disclosed 2,6-disubstituted piperidine N-arylsulfonamides is described. In several cases, amides lessened CYP liabilities in this class of gamma-secretase inhibitors. Selected compounds showed significant reduction of Abeta levels upon oral dosing in a transgenic murine model of Alzheimer's disease.
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Affiliation(s)
- Mark D McBriar
- Schering-Plough Research Institute, 2015 Galloping Hill Road, Kenilworth, NJ 07033, USA.
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45
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Bobeck DR, Warner DL, Vedejs E. Internal azomethine ylide cycloaddition methodology for access to the substitution pattern of aziridinomitosene A. J Org Chem 2007; 72:8506-18. [PMID: 17910499 PMCID: PMC2570649 DOI: 10.1021/jo7013559] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Highly substituted, tethered alkyne dipolarophiles participate in the internal 2 + 3 cycloaddition with azomethine ylides generated by treatment of oxazolium salts with cyanide ion. Starting from oxazole 26, a sequence of N-methylation, cyanide addition, and electrocyclic ring opening of a 4-oxazoline intermediate affords the indoloquinone 31 in a one-pot process. A similar reaction from the protected alkynol derivative 25 affords the sensitive, but isolable, enone 32, and subsequent oxidation affords 31 and the deprotected quinone alcohol 34. Related azomethine cycloaddition methodology via intramolecular oxazolium salt formation from 43 or 46 is also demonstrated and allows the synthesis of quinone 45 and derived structures having the substitution pattern of aziridinomitosene A. Removal of the N-trityl protecting group could not be achieved without aziridine cleavage.
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Affiliation(s)
- Drew R. Bobeck
- Chemistry Department, University of Michigan, Ann Arbor Michigan, 48109
| | - Don L. Warner
- Chemistry Department, University of Michigan, Ann Arbor Michigan, 48109
| | - Edwin Vedejs
- Chemistry Department, University of Michigan, Ann Arbor Michigan, 48109
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46
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Bull JA, Balskus EP, Horan RAJ, Langner M, Ley SV. Total Synthesis of Potent Antifungal Marine Bisoxazole Natural Products Bengazoles A and B. Chemistry 2007; 13:5515-38. [PMID: 17440905 DOI: 10.1002/chem.200700033] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The bengazoles are a family of marine natural products that display potent antifungal activity and a unique structure, containing two oxazole rings flanking a single carbon atom. Total syntheses of bengazole A and B are described, which contain a sensitive stereogenic centre at this position between the two oxazoles. Additionally, the synthesis of 10-epi-bengazole A is reported. Two parallel synthetic routes were investigated, relying on construction of the 2,4-disubstituted oxazole under mild conditions and a diastereoselective 1,3-dipolar cycloaddition. Our successful route is high yielding, provides rapid access to single stereoisomers of the complex natural products and allows the synthesis of analogues for biological evaluation.
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Affiliation(s)
- James A Bull
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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47
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A facile synthesis of oxazolo[3,2-a][1,10]phenanthrolines via a new multicomponent reaction. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.03.048] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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49
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