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Zhuang D, Wu Y, Wang S, Tao Y, Liu P, Luo X, Wang T, Yan R. TFA-Mediated Synthesis of 1,2,4-Oxadiazoles from Carbamates and Nitriles. J Org Chem 2024; 89:7330-7338. [PMID: 38685200 DOI: 10.1021/acs.joc.4c00640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
An unprecedented protocol for the synthesis of 1,2,4-oxadiazoles from carbamates has been developed by employing nitriles as both substrates and solvents. This one-pot procedure achieves the formation of C═N bonds via TFA-mediated [3+2] annulation. A series of 1,2,4-oxadiazoles are synthesized in moderate to good yields.
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Affiliation(s)
- Daijiao Zhuang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Yuankun Wu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Shuairan Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Yuelin Tao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Peihua Liu
- Research Institute of Oil and Gas Technology of Changqing Oilfield Company, Xian 710018, Shanxi, China
| | - Xiaofeng Luo
- Chengdu Guibao Science and Technology Company, Ltd., Chengdu 610041, Sichuan, China
| | - Tianqiang Wang
- Chengdu Guibao Science and Technology Company, Ltd., Chengdu 610041, Sichuan, China
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
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2
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Sharmin D, Mian MY, Marcotte M, Prevot TD, Sibille E, Witkin JM, Cook JM. Synthesis and Receptor Binding Studies of α5 GABA AR Selective Novel Imidazodiazepines Targeted for Psychiatric and Cognitive Disorders. Molecules 2023; 28:4771. [PMID: 37375326 DOI: 10.3390/molecules28124771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/09/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
GABA mediates inhibitory actions through various GABAA receptor subtypes, including 19 subunits in human GABAAR. Dysregulation of GABAergic neurotransmission is associated with several psychiatric disorders, including depression, anxiety, and schizophrenia. Selective targeting of α2/3 GABAARs can treat mood and anxiety, while α5 GABAA-Rs can treat anxiety, depression, and cognitive performance. GL-II-73 and MP-III-022, α5-positive allosteric modulators have shown promising results in animal models of chronic stress, aging, and cognitive disorders, including MDD, schizophrenia, autism, and Alzheimer's disease. Described in this article is how small changes in the structure of imidazodiazepine substituents can greatly impact the subtype selectivity of benzodiazepine GABAAR. To investigate alternate and potentially more effective therapeutic compounds, modifications were made to the structure of imidazodiazepine 1 to synthesize different amide analogs. The novel ligands were screened at the NIMH PDSP against a panel of 47 receptors, ion channels, including hERG, and transporters to identify on- and off-target interactions. Any ligands with significant inhibition in primary binding were subjected to secondary binding assays to determine their Ki values. The newly synthesized imidazodiazepines were found to have variable affinities for the benzodiazepine site and negligible or no binding to any off-target profile receptors that could cause other physiological problems.
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Affiliation(s)
- Dishary Sharmin
- Department of Chemistry and Biochemistry, Milwaukee Institute of Drug Discovery, University of Wisconsin Milwaukee, Milwaukee, WI 53201, USA
| | - Md Yeunus Mian
- Department of Chemistry and Biochemistry, Milwaukee Institute of Drug Discovery, University of Wisconsin Milwaukee, Milwaukee, WI 53201, USA
| | - Michael Marcotte
- Campbell Family Mental Health Research Institute of CAMH, Toronto, ON M5S 2S1, Canada
| | - Thomas D Prevot
- Campbell Family Mental Health Research Institute of CAMH, Toronto, ON M5S 2S1, Canada
- Department of Psychiatry, University of Toronto, Toronto, ON M5T 1R8, Canada
| | - Etienne Sibille
- Campbell Family Mental Health Research Institute of CAMH, Toronto, ON M5S 2S1, Canada
- Department of Psychiatry, University of Toronto, Toronto, ON M5T 1R8, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON M5T 1R8, Canada
| | - Jeffrey M Witkin
- Department of Chemistry and Biochemistry, Milwaukee Institute of Drug Discovery, University of Wisconsin Milwaukee, Milwaukee, WI 53201, USA
- Laboratory of Antiepileptic Drug Discovery, Ascension, St. Vincent, Indianapolis, IN 46260, USA
| | - James M Cook
- Department of Chemistry and Biochemistry, Milwaukee Institute of Drug Discovery, University of Wisconsin Milwaukee, Milwaukee, WI 53201, USA
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Kucukoglu K, Faydali N, Bul D, Nadaroglu H, Sever B, Altıntop MD, Ozturk B, Guzel I. Synthesis, in silico and in vitro evaluation of new 3,5-disubstituted-1,2,4-oxadiazole derivatives as carbonic anhydrase inhibitors and cytotoxic agents. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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Mohammad BD, Baig MS, Bhandari N, Siddiqui FA, Khan SL, Ahmad Z, Khan FS, Tagde P, Jeandet P. Heterocyclic Compounds as Dipeptidyl Peptidase-IV Inhibitors with Special Emphasis on Oxadiazoles as Potent Anti-Diabetic Agents. Molecules 2022; 27:molecules27186001. [PMID: 36144735 PMCID: PMC9502781 DOI: 10.3390/molecules27186001] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/11/2022] [Accepted: 09/12/2022] [Indexed: 11/25/2022] Open
Abstract
Dipeptidyl peptidase-IV (DPP-IV) inhibitors, often known as gliptins, have been used to treat type 2 diabetes mellitus (T2DM). They may be combined with other medications as an additional treatment or used alone as a monotherapy. In addition to insulin, sulfonylureas, thiazolidinediones, and metformin, these molecules appear as possible therapeutic options. Oxadiazole rings have been employed in numerous different ways during drug development efforts. It has been shown that including them in the pharmacophore increases the amount of ligand that may be bound. The exceptional hydrogen bond acceptor properties of oxadiazoles and the distinct hydrocarbon bonding potential of their regioisomers have been established. Beside their anti-diabetic effects, oxadiazoles display a wide range of pharmacological properties. In this study, we made the assumption that molecules containing oxadiazole rings may afford a different approach to the treatment of diabetes, not only for controlling glycemic levels but also for preventing atherosclerosis progression and other complications associated with diabetes. It was observed that oxadiazole fusion with benzothiazole, 5-(2,5,2-trifluoroethoxy) phenyl, β-homophenylalanine, 2-methyl-2-{5-(4-chlorophenyl), diamine-bridged bis-coumarinyl, 5-aryl-2-(6′-nitrobenzofuran-2′-yl), nitrobenzofuran, and/or oxindole leads to potential anti-diabetic activity.
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Affiliation(s)
- Badrud Duza Mohammad
- Department of Pharmaceutical Chemistry, G R T Institute of Pharmaceutical Education and Research, GRT Mahalakshmi Nagar, Tiruttani 631209, Tamil Nadu, India
| | - Mirza Shahed Baig
- Department of Pharmaceutical Chemistry, Y. B. Chavan College of Pharmacy, Aurangabad 431001, Maharashtra, India
| | - Neeraj Bhandari
- Arni School of Pharmacy, Arni University, Kathgarh, Indora 176401, Himachal Pradesh, India
| | - Falak A. Siddiqui
- Department of Pharmaceutical Chemistry, N.B.S. Institute of Pharmacy, Ausa 413520, Maharashtra, India
| | - Sharuk L. Khan
- Department of Pharmaceutical Chemistry, N.B.S. Institute of Pharmacy, Ausa 413520, Maharashtra, India
- Correspondence: (S.L.K.); (P.J.)
| | - Zubair Ahmad
- Unit of Bee Research and Honey Production, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
- Biology Department, College of Arts and Sciences, Dehran Al-Junub, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Farhat S. Khan
- Biology Department, College of Arts and Sciences, Dehran Al-Junub, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Priti Tagde
- Patel College of Pharmacy, Madhyanchal Professional University, Bhopal 462044, Madhya Pradesh, India
| | - Philippe Jeandet
- Research Unit Induced Resistance and Plant Bioprotection, University of Reims, USC INRAe 1488, SFR Condorcet FR CNRS 3417, 51687 Reims, France
- Correspondence: (S.L.K.); (P.J.)
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Hassan A, Khan AH, Saleem F, Ahmad H, Khan KM. A patent review on pharmaceutical and therapeutic applications of oxadiazole derivatives for the treatment of chronic diseases (2013-2021). Expert Opin Ther Pat 2022; 32:969-1001. [PMID: 35993146 DOI: 10.1080/13543776.2022.2116312] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Oxadiazole is a unique class of heterocycle, possessing numerous important biomedical and therapeutic applications such as anti-bacterial, anti-cancer, anti-inflammatory, inhibitors for diverse enzymes, receptors modulators, and neuroprotective properties. The rapid development in the field of oxadiazole-containing structures is confirmed by the development of numerous clinical drugs such as doxazosin, nesapidil, pleconaril, fasiplon, ataluren, zibotentan, and prenoxdiazine as selected examples. AREAS COVERED This review provides a comprehensive overview of the range of biological applications of oxadiazole-containing drugs in a range of patents from 2013 to 2021. The information was collected from available data sources including SciFinder, Reaxys, MedLine, and Chemical Abstracts. EXPERT OPINION Oxadiazole is an established class of compounds with fascinating biological properties. The importance of oxadiazoles can be recognized by their enormous application in a wide spectrum of medicinal chemistry from anticancer, antibiotic, and antidiabetic to the use in agriculture and neuroprotection. For instance, the oxadiazole-based compounds have shown the ability to modulate a variety of receptors including the M4 receptor agonists, S1P1 receptor modulators, SSTR5 antagonists, orexin type-2 receptor agonists, liver X receptor agonists, and many more. This testifies to the special features associated with the oxadiazole scaffold making it a significant pharmacophore.
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Affiliation(s)
- Abbas Hassan
- Department of Chemistry, Quaid-i-Azam University, Islamabad-45320 Pakistan
| | - Abid Hussain Khan
- Department of Chemistry, Quaid-i-Azam University, Islamabad-45320 Pakistan
| | - Faiza Saleem
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75720, Pakistan
| | - Haseen Ahmad
- Department of Chemistry, Quaid-i-Azam University, Islamabad-45320 Pakistan
| | - Khalid Mohammed Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75720, Pakistan.,Department of Clinical Pharmacy, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P. O. Box 31441, Dammam Saudi Arabia
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Shah S, Khan M, Ali M, Wadood A, Ur Rehman A, Shah Z, Yousaf M, Salar U, Khan KM. Bis-1,3,4-Oxadiazole Derivatives as Novel and Potential Urease Inhibitors; Synthesis, In Vitro, and In Silico Studies. Med Chem 2022; 18:820-830. [PMID: 35232342 DOI: 10.2174/1573406418666220301161934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 12/22/2021] [Accepted: 01/06/2022] [Indexed: 11/22/2022]
Abstract
AIMS Synthesis of bis-1,3,4-oxadiazole derivatives as novel and potential urease inhibitors. BACKGROUND Despite many important biological activities associated with oxadiazoles, they are still neglected by medicinal chemists for their possible urease inhibitory activity. Keeping in view the countless importance of urease inhibitors, we have synthesized a new library of substituted bis-oxadiazole derivatives (1-21) to evaluate their urease inhibitory potential. OBJECTIVE Synthesis of substituted bis-oxadiazole derivatives (1-21) to evaluate their urease inhibitory potential. METHOD Bis-1,3,4-oxadiazole derivatives 1-21 were synthesized through sequential reactions using starting material isophthalic acid. Esterification reaction was done by refluxing in methanol for 2 h in the presence of the catalytic amount of concentrated H2SO4 till dissolution. In the second step, dimethyl isophthalate and hydrazine hydrate in excess (1:5) were refluxed in methanol to afford isophthalic dihydrazide. Then, isophthalic dihydrazide was treated with different substituted benzaldehydes in a 1:2 ratio under acidic conditions Result: In vitro urease, the inhibitory activity of the synthesized compounds were evaluated and results demonstrated good activities with IC50 values in the range of 13.46 ± 0.34 to 74.45 ± 3.81 µM as compared to the standard thiourea (IC50 = 21.13 ± 0.415 µM). Most of the compounds were found to be more potent than the standard. The structure-activity relationship (SAR) suggested that the variations in the inhibitory activities of the compounds were due to different substitutions. Furthermore; in silico study was also performed. CONCLUSION Current study identified a new class of urease inhibitors. All synthetic compounds 1-21 showed potent as well as good to moderate urease inhibitory activities except 3. SAR suggested that hydroxy-bearing analogs were identified exceptionally good. Molecular docking revealed many important interactions made by compounds with the active site of the urease enzyme.
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Affiliation(s)
- Sana Shah
- Department of Chemistry, Abdul Wali Khan University, Mardan-23200, Khyber Pakhtunkhwa, Pakistan
| | - Momin Khan
- Department of Chemistry, Abdul Wali Khan University, Mardan-23200, Khyber Pakhtunkhwa, Pakistan
| | - Mahboob Ali
- Department of Biochemistry, Abdul Wali Khan University, Mardan, Khyber Pakhtunkhwa, Pakistan
| | - Abdul Wadood
- School of Biological Sciences, University of California, Irvine, CA 92697-3900, U.S.A
| | - Ashfaq Ur Rehman
- Department of Chemistry, Bacha Khan University Charsadda, Charsadda-24420, Pakistan
| | - Zarbad Shah
- Department of Chemistry, Abdul Wali Khan University, Mardan-23200, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Yousaf
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Uzma Salar
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Khalid Mohammed Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
- Department of Clinical Pharmacy, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 31441, Dammam, Saudi Arabia
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7
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Ali I, Rafique R, Khan KM, Chigurupati S, Ji X, Wadood A, Rehman AU, Salar U, Iqbal MS, Taha M, Perveen S, Ali B. Potent α-amylase inhibitors and radical (DPPH and ABTS) scavengers based on benzofuran-2-yl(phenyl)methanone derivatives: Syntheses, in vitro, kinetics, and in silico studies. Bioorg Chem 2020; 104:104238. [PMID: 32911195 DOI: 10.1016/j.bioorg.2020.104238] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 05/03/2020] [Accepted: 08/10/2020] [Indexed: 12/19/2022]
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8
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Wong JYF, Tobin JM, Vilela F, Barker G. Batch Versus Flow Lithiation–Substitution of 1,3,4‐Oxadiazoles: Exploitation of Unstable Intermediates Using Flow Chemistry. Chemistry 2019; 25:12439-12445. [DOI: 10.1002/chem.201902917] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/26/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Jeff Y. F. Wong
- Institute of Chemical SciencesHeriot-Watt University Riccarton Edinburgh UK
| | - John M. Tobin
- Institute of Chemical SciencesHeriot-Watt University Riccarton Edinburgh UK
| | - Filipe Vilela
- Institute of Chemical SciencesHeriot-Watt University Riccarton Edinburgh UK
| | - Graeme Barker
- Institute of Chemical SciencesHeriot-Watt University Riccarton Edinburgh UK
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9
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Sun S, Jia Q, Zhang Z. Applications of amide isosteres in medicinal chemistry. Bioorg Med Chem Lett 2019; 29:2535-2550. [PMID: 31377035 DOI: 10.1016/j.bmcl.2019.07.033] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 07/17/2019] [Accepted: 07/19/2019] [Indexed: 12/18/2022]
Abstract
Isosteric replacement of amide groups is a classic practice in medicinal chemistry. This digest highlights the applications of most commonly employed amide isosteres in drug design aiming at improving potency and selectivity, optimizing physicochemical and pharmacokinetic properties, eliminating or modifying toxicophores, as well as providing novel intellectual property of lead compounds.
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Affiliation(s)
- Shaoyi Sun
- Xenon Pharmaceuticals Inc., 200-3650 Gilmore Way, Burnaby, BC V5G 4W8, Canada.
| | - Qi Jia
- Xenon Pharmaceuticals Inc., 200-3650 Gilmore Way, Burnaby, BC V5G 4W8, Canada
| | - Zaihui Zhang
- Signalchem Lifesciences Corp., 110-13210, Vanier Place, Richmond, BC V6V 2J2, Canada
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Popiołek Ł, Biernasiuk A, Paruch K, Malm A, Wujec M. Synthesis and in Vitro Antimicrobial Activity Screening of New 3-Acetyl-2,5-disubstituted-1,3,4-oxadiazoline Derivatives. Chem Biodivers 2019; 16:e1900082. [PMID: 31050208 DOI: 10.1002/cbdv.201900082] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 03/29/2019] [Indexed: 01/18/2023]
Abstract
Thirteen new 3-acetyl-2,5-disubstituted-1,3,4-oxadiazoline derivatives were synthesized from corresponding hydrazide-hydrazones of isonicotinic acid in the reaction with acetic anhydride. The obtained compounds were identified with the use of spectral methods (IR, 1 H-NMR, 13 C-NMR, MS). In vitro antimicrobial activity screening of synthesized compounds against a panel of bacteria and fungi revealed interesting antibacterial and antifungal activity of tested 1,3,4-oxadiazoline derivatives, which is comparable to that of commonly used antimicrobial agents.
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Affiliation(s)
- Łukasz Popiołek
- Chair and Department of Organic Chemistry, Faculty of Pharmacy with Medical Analytics Division, Medical University of Lublin, 4A Chodźki Street, 20-093, Lublin, Poland
| | - Anna Biernasiuk
- Chair and Department of Pharmaceutical Microbiology, Faculty of Pharmacy with Medical Analytics Division, Medical University of Lublin, 1 Chodźki Street, 20-093, Lublin, Poland
| | - Kinga Paruch
- Chair and Department of Organic Chemistry, Faculty of Pharmacy with Medical Analytics Division, Medical University of Lublin, 4A Chodźki Street, 20-093, Lublin, Poland
| | - Anna Malm
- Chair and Department of Pharmaceutical Microbiology, Faculty of Pharmacy with Medical Analytics Division, Medical University of Lublin, 1 Chodźki Street, 20-093, Lublin, Poland
| | - Monika Wujec
- Chair and Department of Organic Chemistry, Faculty of Pharmacy with Medical Analytics Division, Medical University of Lublin, 4A Chodźki Street, 20-093, Lublin, Poland
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11
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Längle D, Werner TR, Wesseler F, Reckzeh E, Schaumann N, Drowley L, Polla M, Plowright AT, Hirt MN, Eschenhagen T, Schade D. Toward Second-Generation Cardiomyogenic and Anti-cardiofibrotic 1,4-Dihydropyridine-Class TGFβ Inhibitors. ChemMedChem 2019; 14:810-822. [PMID: 30768867 DOI: 10.1002/cmdc.201900036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 02/11/2019] [Indexed: 01/14/2023]
Abstract
Innovative therapeutic modalities for pharmacological intervention of transforming growth factor β (TGFβ)-dependent diseases are of great value. b-Annelated 1,4-dihydropyridines (DHPs) might be such a class, as they induce TGFβ receptor type II degradation. However, intrinsic drawbacks are associated with this compound class and were systematically addressed in the presented study. It was possible to install polar functionalities and bioisosteric moieties at distinct sites of the molecules while maintaining TGFβ-inhibitory activities. The introduction of a 2-amino group or 7-N-alkyl modification proved to be successful strategies. Aqueous solubility was improved by up to seven-fold at pH 7.4 and 200-fold at pH 3 relative to the parent ethyl 4-(biphenyl-4-yl)-2,7,7-trimethyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate. The therapeutic potential of the presented DHPs was further underscored in view of a potential dual mode of action: The differentiation of committed human iPSC-derived cardiac progenitor cells (CPCs) was potently stimulated, and the rescue of cardiac fibrosis phenotypes was observed in engineered heart tissue (EHT) constructs.
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Affiliation(s)
- Daniel Längle
- Department of Chemistry and Chemical Biology, Technische Universität Dortmund, Otto-Hahn-Str. 4, 44227, Dortmund, Germany.,Department of Pharmaceutical and Medicinal Chemistry, Christian-Albrechts-Universität Kiel, Gutenbergstr. 76, 24118, Kiel, Germany
| | - Tessa R Werner
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Fabian Wesseler
- Department of Chemistry and Chemical Biology, Technische Universität Dortmund, Otto-Hahn-Str. 4, 44227, Dortmund, Germany
| | - Elena Reckzeh
- Department of Chemistry and Chemical Biology, Technische Universität Dortmund, Otto-Hahn-Str. 4, 44227, Dortmund, Germany
| | - Niklas Schaumann
- Department of Chemistry and Chemical Biology, Technische Universität Dortmund, Otto-Hahn-Str. 4, 44227, Dortmund, Germany
| | - Lauren Drowley
- Cardiovascular, Renal and Metabolic Diseases IMED Biotech Unit, AstraZeneca Gothenburg, Pepparsleden 1, 43 183, Mölndal, Sweden
| | - Magnus Polla
- Cardiovascular, Renal and Metabolic Diseases IMED Biotech Unit, AstraZeneca Gothenburg, Pepparsleden 1, 43 183, Mölndal, Sweden
| | - Alleyn T Plowright
- Cardiovascular, Renal and Metabolic Diseases IMED Biotech Unit, AstraZeneca Gothenburg, Pepparsleden 1, 43 183, Mölndal, Sweden
| | - Marc N Hirt
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Thomas Eschenhagen
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Dennis Schade
- Department of Chemistry and Chemical Biology, Technische Universität Dortmund, Otto-Hahn-Str. 4, 44227, Dortmund, Germany.,Department of Pharmaceutical and Medicinal Chemistry, Christian-Albrechts-Universität Kiel, Gutenbergstr. 76, 24118, Kiel, Germany
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12
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Repsold BP, Malan SF, Joubert J, Oliver DW. Multi-targeted directed ligands for Alzheimer's disease: design of novel lead coumarin conjugates. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2018; 29:231-255. [PMID: 29390885 DOI: 10.1080/1062936x.2018.1423641] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 01/01/2018] [Indexed: 06/07/2023]
Abstract
Alzheimer's Disease (AD) is a neurodegenerative disease characterized by central nervous system insults with progressive cognitive (memory, attention) and non-cognitive (anxiety, depression) impairments. Pathophysiological events affect predominantly cholinergic neuronal loss and dysfunctions of the dopaminergic system. The aim of the current study was to design multi-targeted directed lead structures based on the coumarin scaffold with inhibitory properties at two key enzymes in disease relevant systems, i.e. acetylcholinesterase (AChE) and monoamine oxidase B (MAO-B). Conventional and microwave synthetic methods were utilized to synthesize coumarin scaffold-based novel morpholino, piperidino, thiophene and erucic acid conjugates. Biological assays indicated that the coumarin-morpholine ether conjugate BPR 10 was the most potent hMAO-B inhibitor. The coumarin-piperidine conjugates BPR 13 and BPR 12 were the most potent inhibitors of eeAChE at 100 μM and 1 μM, respectively. Molecular modelling studies were conducted with Accelrys® Discovery Studio® V3.1.1 utilising the published hMAO-B (2V61) and hAChE (4EY7) crystal structures. Compound BPR 10 occupies both the entrance and substrate cavities of the active site of MAO-B. BPR 13 resides in both the peripheral anionic site (PAS) and the catalytic anionic site (CAS) of hAChE. This study demonstrated that the coumarin scaffold serves as a promising pharmacophore for MTDLs design.
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Affiliation(s)
- B P Repsold
- a Pharmaceutical Chemistry, School of Pharmacy , North-West University , Potchefstroom , South Africa
| | - S F Malan
- b Pharmaceutical Chemistry, School of Pharmacy , University of the Western Cape , Bellville , South Africa
| | - J Joubert
- b Pharmaceutical Chemistry, School of Pharmacy , University of the Western Cape , Bellville , South Africa
| | - D W Oliver
- a Pharmaceutical Chemistry, School of Pharmacy , North-West University , Potchefstroom , South Africa
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13
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14
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Avanzo RE, Padrón JM, D'Accorso NB, Fascio ML. Synthesis and in vitro antiproliferative activities of (5-aryl-1,2,4-oxadiazole-3-yl) methyl d-ribofuranosides. Bioorg Med Chem Lett 2017; 27:3674-3677. [DOI: 10.1016/j.bmcl.2017.07.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 06/23/2017] [Accepted: 07/04/2017] [Indexed: 12/12/2022]
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15
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Ordóñez M, Cativiela C, Romero-Estudillo I. An update on the stereoselective synthesis of γ-amino acids. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.08.011] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Likhite N, Lakshminarasimhan T, Rao MHVR, Shekarappa V, Sidar S, Subramanian V, Fraunhoffer KJ, Leung S, Vaidyanathan R. A Scalable Synthesis of 2-(1,2,4-Oxadiazol-3-yl)propan-2-amine Hydrobromide Using a Process Safety-Driven Protecting Group Strategy. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.6b00145] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nachiket Likhite
- Chemical
and Synthetic Development, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Thirumalai Lakshminarasimhan
- Chemical
and Synthetic Development, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Mallem H. V. Ramana Rao
- Chemical
and Synthetic Development, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Vijaykumar Shekarappa
- Chemical
and Synthetic Development, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Somprabha Sidar
- Chemical
and Synthetic Development, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Varadharajan Subramanian
- Chemical
and Synthetic Development, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Kenneth J. Fraunhoffer
- Chemical
and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Simon Leung
- Chemical
and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Rajappa Vaidyanathan
- Chemical
and Synthetic Development, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
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17
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Houck JD, Dawson TK, Kennedy AJ, Kharel Y, Naimon ND, Field SD, Lynch KR, Macdonald TL. Structural Requirements and Docking Analysis of Amidine-Based Sphingosine Kinase 1 Inhibitors Containing Oxadiazoles. ACS Med Chem Lett 2016; 7:487-92. [PMID: 27190598 DOI: 10.1021/acsmedchemlett.6b00002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 03/01/2016] [Indexed: 12/18/2022] Open
Abstract
Sphingosine 1-phosphate (S1P) is a potent growth-signaling lipid that has been implicated in cancer progression, inflammation, sickle cell disease, and fibrosis. Two sphingosine kinases (SphK1 and 2) are the source of S1P; thus, inhibitors of the SphKs have potential as targeted cancer therapies and will help to clarify the roles of S1P and the SphKs in other hyperproliferative diseases. Recently, we reported a series of amidine-based inhibitors with high selectivity for SphK1 and potency in the nanomolar range. However, these inhibitors display a short half-life. With the goal of increasing metabolic stability and maintaining efficacy, we designed an analogous series of molecules containing oxadiazole moieties. Generation of a library of molecules resulted in the identification of the most selective inhibitor of SphK1 reported to date (705-fold selectivity over SphK2), and we found that potency and selectivity vary significantly depending on the particular oxadiazole isomer employed. The best inhibitors were subjected to in silico molecular dynamics docking analysis, which revealed key insights into the binding of amidine-based inhibitors by SphK1. Herein, the design, synthesis, biological evaluation, and docking analysis of these molecules are described.
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Affiliation(s)
- Joseph D. Houck
- Department of Chemistry, University of Virginia, McCormick Road, Charlottesville, Virginia 22904, United States
| | - Thomas K. Dawson
- Department of Chemistry, University of Virginia, McCormick Road, Charlottesville, Virginia 22904, United States
| | - Andrew J. Kennedy
- Department of Chemistry, University of Virginia, McCormick Road, Charlottesville, Virginia 22904, United States
| | - Yugesh Kharel
- Department of Pharmacology, University of Virginia, 1340 Jefferson Park Avenue, Charlottesville, Virginia 22904, United States
| | - Niels D. Naimon
- Department of Chemistry, University of Virginia, McCormick Road, Charlottesville, Virginia 22904, United States
| | - Saundra D. Field
- Department of Chemistry, University of Virginia, McCormick Road, Charlottesville, Virginia 22904, United States
| | - Kevin R. Lynch
- Department of Pharmacology, University of Virginia, 1340 Jefferson Park Avenue, Charlottesville, Virginia 22904, United States
| | - Timothy L. Macdonald
- Department of Chemistry, University of Virginia, McCormick Road, Charlottesville, Virginia 22904, United States
- Department of Pharmacology, University of Virginia, 1340 Jefferson Park Avenue, Charlottesville, Virginia 22904, United States
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18
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Taha M, Ismail NH, Imran S, Wadood A, Rahim F, Saad SM, Khan KM, Nasir A. Synthesis, molecular docking and α-glucosidase inhibition of 5-aryl-2-(6'-nitrobenzofuran-2'-yl)-1,3,4-oxadiazoles. Bioorg Chem 2016; 66:117-23. [PMID: 27149363 DOI: 10.1016/j.bioorg.2016.04.006] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 04/18/2016] [Accepted: 04/26/2016] [Indexed: 11/17/2022]
Abstract
Twenty derivatives of 5-aryl-2-(6'-nitrobenzofuran-2'-yl)-1,3,4-oxadiazoles (1-20) were synthesized and evaluated for their α-glucosidase inhibitory activities. Compounds containing hydroxyl and halogens (1-6, and 8-18) were found to be five to seventy folds more active with IC50 values in the range of 12.75±0.10-162.05±1.65μM, in comparison with the standard drug, acarbose (IC50=856.45±5.60μM). Current study explores the α-glucosidase inhibition of a hybrid class of compounds of oxadiazole and benzofurans. These findings may invite researchers to work in the area of treatment of hyperglycemia. Docking studies showed that most compounds are interacting with important amino acids Glu 276, Asp 214 and Phe 177 through hydrogen bonds and arene-arene interaction.
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Affiliation(s)
- Muhammad Taha
- Atta-ur-Rahman Institute for Natural Product Discovery, Universiti Teknologi MARA (UiTM), Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor, Malaysia; Faculty of Applied Science, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia.
| | - Nor Hadiani Ismail
- Atta-ur-Rahman Institute for Natural Product Discovery, Universiti Teknologi MARA (UiTM), Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor, Malaysia; Faculty of Applied Science, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia
| | - Syahrul Imran
- Atta-ur-Rahman Institute for Natural Product Discovery, Universiti Teknologi MARA (UiTM), Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor, Malaysia; Faculty of Applied Science, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia
| | - Abdul Wadood
- Computational Medicinal Chemistry Laboratory, Department of Biochemistry, Abdul Wali Khan University, Mardan, Mardan 23200, Pakistan
| | - Fazal Rahim
- Department of Chemistry, Hazara University, Mansehra, 21300, Pakistan
| | - Syed Muhammad Saad
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Khalid Mohammed Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Abdul Nasir
- Computational Medicinal Chemistry Laboratory, Department of Biochemistry, Abdul Wali Khan University, Mardan, Mardan 23200, Pakistan
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19
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Li F, Ma C, DeGrado WF, Wang J. Discovery of Highly Potent Inhibitors Targeting the Predominant Drug-Resistant S31N Mutant of the Influenza A Virus M2 Proton Channel. J Med Chem 2016; 59:1207-16. [PMID: 26771709 DOI: 10.1021/acs.jmedchem.5b01910] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
With the emergence of highly pathogenic avian influenza (HPAI) H7N9 and H5N1 strains, there is a pressing need to develop direct-acting antivirals (DAAs) to combat such deadly viruses. The M2-S31N proton channel of the influenza A virus (A/M2) is one of the validated and most conserved proteins encoded by the current circulating influenza A viruses; thus, it represents a high-profile drug target for therapeutic intervention. We recently discovered a series of S31N inhibitors with the general structure of adamantyl-1-NH2(+)CH2-aryl, but they generally had poor physical properties and some showed toxicity in vitro. In this study, we sought to optimize both the adamantyl as well as the aryl/heteroaryl group. Several compounds from this study exhibited submicromolar EC50 values against S31N-containing A/WSN/33 influenza viruses in antiviral plaque reduction assays with a selectivity index greater than 100, indicating that these compounds are promising candidates for in-depth preclinical pharmacology.
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Affiliation(s)
- Fang Li
- Department of Pharmacology and Toxicology, College of Pharmacy, The University of Arizona , Tucson, Arizona 85721, United States.,BIO5 Institute, The University of Arizona , Tucson, Arizona 85721, United States
| | - Chunlong Ma
- Department of Pharmacology and Toxicology, College of Pharmacy, The University of Arizona , Tucson, Arizona 85721, United States.,BIO5 Institute, The University of Arizona , Tucson, Arizona 85721, United States
| | - William F DeGrado
- Department of Pharmaceutical Chemistry, University of California , San Francisco, California 94158, United States
| | - Jun Wang
- Department of Pharmacology and Toxicology, College of Pharmacy, The University of Arizona , Tucson, Arizona 85721, United States.,BIO5 Institute, The University of Arizona , Tucson, Arizona 85721, United States
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20
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Taha M, Ismail NH, Imran S, Selvaraj M, Rahim A, Ali M, Siddiqui S, Rahim F, Khan KM. Synthesis of novel benzohydrazone–oxadiazole hybrids as β-glucuronidase inhibitors and molecular modeling studies. Bioorg Med Chem 2015; 23:7394-404. [DOI: 10.1016/j.bmc.2015.10.037] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 10/22/2015] [Accepted: 10/24/2015] [Indexed: 11/27/2022]
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21
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Khojastehnezhad A, Eshghi H, Moeinpour F, Bakavoli M, Izadyar M, Tajabadi J. Density functional theory study of the regio‐ and stereoselectivity of 1,3-dipolar cycloaddition reactions between 2-ethylthio-4-phenyl-1-azetin and some substituted nitrile oxides. Struct Chem 2015. [DOI: 10.1007/s11224-015-0703-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Taha M, Ismail NH, Imran S, Rokei MQB, Saad SM, Khan KM. Synthesis of new oxadiazole derivatives as α-glucosidase inhibitors. Bioorg Med Chem 2015; 23:4155-4162. [DOI: 10.1016/j.bmc.2015.06.060] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 06/23/2015] [Indexed: 12/15/2022]
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23
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Abstract
The carbamate group is a key structural motif in many approved drugs and prodrugs. There is an increasing use of carbamates in medicinal chemistry and many derivatives are specifically designed to make drug-target interactions through their carbamate moiety. In this Perspective, we present properties and stabilities of carbamates, reagents and chemical methodologies for the synthesis of carbamates, and recent applications of carbamates in drug design and medicinal chemistry.
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Affiliation(s)
- Arun K. Ghosh
- Department of Chemistry and
Department of Medicinal Chemistry, Purdue
University, West Lafayette, Indiana 47907, United States
| | - Margherita Brindisi
- Department of Chemistry and
Department of Medicinal Chemistry, Purdue
University, West Lafayette, Indiana 47907, United States
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24
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Synthesis and differential functionalisation of pyrrolidine and piperidine based spirodiamine scaffolds. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.064] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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25
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Xia G, You X, Liu L, Liu H, Wang J, Shi Y, Li P, Xiong B, Liu X, Shen J. Design, synthesis and SAR of piperidyl-oxadiazoles as 11β-hydroxysteroid dehydrogenase 1 inhibitors. Eur J Med Chem 2013; 62:1-10. [DOI: 10.1016/j.ejmech.2012.12.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Revised: 12/17/2012] [Accepted: 12/23/2012] [Indexed: 01/19/2023]
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26
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Murty MSR, Ramalingeswara Rao B, Katiki MR, Nath LR, Anto RJ. Synthesis of piperazinyl benzothiazole/benzoxazole derivatives coupled with 1,3,4-oxadiazole-2-thiol: novel hybrid heterocycles as anticancer agents. Med Chem Res 2013. [DOI: 10.1007/s00044-013-0510-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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27
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Boström J, Hogner A, Llinàs A, Wellner E, Plowright AT. Oxadiazoles in medicinal chemistry. J Med Chem 2012; 55:1817-30. [PMID: 22185670 DOI: 10.1021/jm2013248] [Citation(s) in RCA: 397] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Oxadiazoles are five-membered heteroaromatic rings containing two carbons, two nitrogens, and one oxygen atom, and they exist in different regioisomeric forms. Oxadiazoles are frequently occurring motifs in druglike molecules, and they are often used with the intention of being bioisosteric replacements for ester and amide functionalities. The current study presents a systematic comparison of 1,2,4- and 1,3,4-oxadiazole matched pairs in the AstraZeneca compound collection. In virtually all cases, the 1,3,4-oxadiazole isomer shows an order of magnitude lower lipophilicity (log D), as compared to its isomeric partner. Significant differences are also observed with respect to metabolic stability, hERG inhibition, and aqueous solubility, favoring the 1,3,4-oxadiazole isomers. The difference in profile between the 1,2,4 and 1,3,4 regioisomers can be rationalized by their intrinsically different charge distributions (e.g., dipole moments). To facilitate the use of these heteroaromatic rings, novel synthetic routes for ready access of a broad spectrum of 1,3,4-oxadiazoles, under mild conditions, are described.
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28
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Goldberg K, Groombridge S, Hudson J, Leach AG, MacFaul PA, Pickup A, Poultney R, Scott JS, Svensson PH, Sweeney J. Oxadiazole isomers: all bioisosteres are not created equal. MEDCHEMCOMM 2012. [DOI: 10.1039/c2md20054f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Xu R, Cole D, Asberom T, Bara T, Bennett C, Burnett DA, Clader J, Domalski M, Greenlee WJ, Hyde L, Josien H, Li H, McBriar M, McKittrick B, Pissarnitski D, Qiang L, Rajagopalan M, Sasikumar T, Su J, Tang H, Wu WL, Zhang L, Zhao Z. SAR of tricyclic sulfones as γ-secretase inhibitors. Sci China Chem 2011. [DOI: 10.1007/s11426-011-4388-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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30
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Das BC, Tang XY, Sanyal S, Mohapatra S, Rogler P, Nayak S, Evans T. Design and Synthesis of 3,5-Disubstituted 1,2,4-Oxadiazole Containing Retinoids from a Retinoic Acid Receptor Agonist. Tetrahedron Lett 2011; 52:2433-2435. [PMID: 21765558 PMCID: PMC3135900 DOI: 10.1016/j.tetlet.2011.03.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We previously synthesized novel retinoid libraries, and after screening for bioactivity found one compound BT10 that functions as a specific agonist for retinoic acid receptors. This lead compound was further derivatized using SAR and LRD to obtain 3,5-disubstituted-1,2,4-oxadiazole-containing retinoids. The new oxadiazole (amide bioisosters)-containing retinoids (compounds 1, 2, 3, 4, 5, and 6) were synthesized in 42-65% yield by reacting with (E)-4-((3-ethyl,2-4,4,4-trimethylcyclohex-2-enylidene)methyl)benzoic acid and phenyl substituted amidoxime in DMF using CDI as the coupling reagent. The biological activities of the synthesized compounds are currently being evaluated.
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Affiliation(s)
- Bhaskar C Das
- Department of Nuclear Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
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31
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Li H, Xu R, Cole D, Clader JW, Greenlee WJ, Nomeir AA, Song L, Zhang L. Design, synthesis, and structure–activity relationship studies of N-arylsulfonyl morpholines as γ-secretase inhibitors. Bioorg Med Chem Lett 2010; 20:6606-9. [DOI: 10.1016/j.bmcl.2010.09.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 09/02/2010] [Accepted: 09/07/2010] [Indexed: 10/19/2022]
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32
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Design and synthesis of tricyclic sulfones as γ-secretase inhibitors with greatly reduced Notch toxicity. Bioorg Med Chem Lett 2010; 20:2591-6. [DOI: 10.1016/j.bmcl.2010.02.080] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 02/17/2010] [Accepted: 02/19/2010] [Indexed: 11/18/2022]
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33
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Kreft AF, Martone R, Porte A. Recent advances in the identification of gamma-secretase inhibitors to clinically test the Abeta oligomer hypothesis of Alzheimer's disease. J Med Chem 2009; 52:6169-88. [PMID: 19694467 DOI: 10.1021/jm900188z] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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34
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Goodman AJ, Ajello CW, Worm K, Bourdonnec BL, Savolainen MA, O’Hare H, Cassel JA, Stabley GJ, DeHaven RN, LaBuda CJ, Koblish M, Little PJ, Brogdon BL, Smith SA, Dolle RE. CB2 selective sulfamoyl benzamides: Optimization of the amide functionality. Bioorg Med Chem Lett 2009; 19:309-13. [DOI: 10.1016/j.bmcl.2008.11.091] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2008] [Revised: 11/21/2008] [Accepted: 11/24/2008] [Indexed: 10/21/2022]
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