1
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Km K, Kumar S, Kumar A, Kant R, Chintakunta R. Palladium‐Catalyzed Intramolecular C‐H Heteroarylation to Access Fused Tricyclic Oxazolo[4,5‐c]Quinolines. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kajol Km
- CSIR-CDRI: Central Drug Research Institute Medicinal & Process Chemistry Division CSIR-CDRI, Lucknow, UP, India 226031 LUCKNOW INDIA
| | - Sujeet Kumar
- CSIR-CDRI: Central Drug Research Institute Medicinal & Process Chemistry Division CSIR-CDRI, Lucknow, UP, India 226031 LUCKNOW INDIA
| | - Amit Kumar
- CSIR-CDRI: Central Drug Research Institute Medicinal & Process Chemistry Division CSIR-CDRI, Lucknow, UP, India 226031 LUCKNOW INDIA
| | - Ruchir Kant
- CSIR-CDRI: Central Drug Research Institute Medicinal & Process Chemistry Division CSIR-CDRI, Lucknow, UP, India 226031 LUCKNOW INDIA
| | - Ramesh Chintakunta
- CSIR-CDRI: Central Drug Research Institute Medicinal and Process Chemistry Division CSIR-CDRI, Lucknow, UP, India 226031 LUCKNOW INDIA
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2
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Mailavaram RP, Al-Attraqchi OH, Kar S, Ghosh S. Current Status in the Design and Development of Agonists and Antagonists of Adenosine A3 Receptor as Potential Therapeutic Agents. Curr Pharm Des 2019; 25:2772-2787. [DOI: 10.2174/1381612825666190716114056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 07/03/2019] [Indexed: 12/31/2022]
Abstract
Adenosine receptors (ARs) belongs to the family of G-protein coupled receptors (GPCR) that are responsible
for the modulation of a wide variety of physiological functions. The ARs are also implicated in many
diseases such as cancer, arthritis, cardiovascular and renal diseases. The adenosine A3 receptor (A3AR) has
emerged as a potential drug target for the progress of new and effective therapeutic agents for the treatment of
various pathological conditions. This receptor’s involvement in many diseases and its validity as a target has been
established by many studies. Both agonists and antagonists of A3AR have been extensively investigated in the last
decade with the goal of developing novel drugs for treating diseases related to immune disorders, inflammation,
cancer, and others. In this review, we shall focus on the medicinal chemistry of A3AR ligands, exploring the
diverse chemical classes that have been projected as future leading drug candidates. Also, the recent advances in
the therapeuetic applications of A3AR ligands are highlighted.
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Affiliation(s)
- Raghu P. Mailavaram
- Department of Pharmaceutical Chemistry, Shri Vishnu College of Pharmacy, Vishnupur (Affiliated to Andhra University), Bhimavaram, W.G. Dist., AP, India
| | - Omar H.A. Al-Attraqchi
- Faculty of Pharmacy, Philadelphia University-Jordan, P.O BOX (1), Philadelphia University- 19392, Amman, Jordan
| | - Supratik Kar
- Interdisciplinary Center for Nanotoxicity, Department of Chemistry, Physics and Atmospheric Sciences, Jackson State University, Jackson, MS 39217, United States
| | - Shinjita Ghosh
- School of Public Health, Jackson State University, Jackson, MS 39217, United States
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3
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New A 2A adenosine receptor antagonists: a structure-based upside-down interaction in the receptor cavity. Bioorg Chem 2019; 92:103183. [PMID: 31446240 DOI: 10.1016/j.bioorg.2019.103183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 07/16/2019] [Accepted: 08/01/2019] [Indexed: 02/07/2023]
Abstract
Adenosine receptor antagonists are generally based on heterocyclic core structures presenting substituents of various volumes and chemical-physical profiles. Adenine and purine-based adenosine receptor antagonists have been reported in literature. In this work we combined various substituents in the 2, 6, and 8-positions of 9-ethylpurine to depict a structure-affinity relationship analysis at the human adenosine receptors. Compounds were rationally designed trough molecular modeling analysis and then synthesized and evaluated at radioligand binding studies at human adenosine receptors. The new compounds showed affinity for the human adenosine receptors, with some derivatives endowed with low nanomolar Ki data, in particular at the A2AAR subtype. The purine core proves to be a versatile core structure for the development of novel adenosine receptor antagonists with nanomolar affinity for these membrane proteins.
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4
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Kumar Y, Jaiswal Y, Kumar A. Copper(II)-Catalyzed Benzylic C(sp3)–H Aerobic Oxidation of (Hetero)Aryl Acetimidates: Synthesis of Aryl-α-ketoesters. J Org Chem 2016; 81:12247-12257. [DOI: 10.1021/acs.joc.6b02176] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Yogesh Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Yogesh Jaiswal
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Amit Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
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5
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Varano F, Catarzi D, Squarcialupi L, Betti M, Vincenzi F, Ravani A, Varani K, Dal Ben D, Thomas A, Volpini R, Colotta V. Exploring the 7-oxo-thiazolo[5,4-d]pyrimidine core for the design of new human adenosine A3 receptor antagonists. Synthesis, molecular modeling studies and pharmacological evaluation. Eur J Med Chem 2015; 96:105-21. [PMID: 25874336 DOI: 10.1016/j.ejmech.2015.04.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 03/31/2015] [Accepted: 04/03/2015] [Indexed: 11/28/2022]
Abstract
A new series of 5-methyl-thiazolo[5,4-d]pyrimidine-7-ones bearing different substituents at position 2 (aryl, heteroaryl and arylamino groups) was synthesized and evaluated in radioligand binding assays to determine their affinities at the human (h) A1, A2A, and A3 adenosine receptors (ARs). Efficacy at the hA(2B) and antagonism of selected ligands at the hA3 were also assessed through cAMP experiments. Some of the new derivatives exhibited good to high hA3AR affinity and selectivity versus all the other AR subtypes. Compound 2-(4-chlorophenyl)-5-methyl-thiazolo[5,4-d]pyrimidine-7-one 4 was found to be the most potent and selective ligand of the series (K(I) hA3 = 18 nM). Molecular docking studies of the reported derivatives were carried out to depict their hypothetical binding mode in our hA3 receptor model.
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Affiliation(s)
- Flavia Varano
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmaceutica e Nutraceutica, Universita' di Firenze, Polo Scientifico, Via Ugo Schiff 6, 50019 Sesto Fiorentino, FI, Italy.
| | - Daniela Catarzi
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmaceutica e Nutraceutica, Universita' di Firenze, Polo Scientifico, Via Ugo Schiff 6, 50019 Sesto Fiorentino, FI, Italy
| | - Lucia Squarcialupi
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmaceutica e Nutraceutica, Universita' di Firenze, Polo Scientifico, Via Ugo Schiff 6, 50019 Sesto Fiorentino, FI, Italy
| | - Marco Betti
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmaceutica e Nutraceutica, Universita' di Firenze, Polo Scientifico, Via Ugo Schiff 6, 50019 Sesto Fiorentino, FI, Italy
| | - Fabrizio Vincenzi
- Dipartimento di Medicina Clinica e Sperimentale, Sezione di Farmacologia, Universita' di Ferrara, Via Fossato di Mortara 17-19, 44121 Ferrara, Italy
| | - Annalisa Ravani
- Dipartimento di Medicina Clinica e Sperimentale, Sezione di Farmacologia, Universita' di Ferrara, Via Fossato di Mortara 17-19, 44121 Ferrara, Italy
| | - Katia Varani
- Dipartimento di Medicina Clinica e Sperimentale, Sezione di Farmacologia, Universita' di Ferrara, Via Fossato di Mortara 17-19, 44121 Ferrara, Italy
| | - Diego Dal Ben
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, Via S. Agostino 1, 62032 Camerino, MC, Italy
| | - Ajiroghene Thomas
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, Via S. Agostino 1, 62032 Camerino, MC, Italy
| | - Rosaria Volpini
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, Via S. Agostino 1, 62032 Camerino, MC, Italy
| | - Vittoria Colotta
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmaceutica e Nutraceutica, Universita' di Firenze, Polo Scientifico, Via Ugo Schiff 6, 50019 Sesto Fiorentino, FI, Italy
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6
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Squarcialupi L, Colotta V, Catarzi D, Varano F, Betti M, Varani K, Vincenzi F, Borea PA, Porta N, Ciancetta A, Moro S. 7-Amino-2-phenylpyrazolo[4,3-d]pyrimidine derivatives: Structural investigations at the 5-position to target human A1 and A2A adenosine receptors. Molecular modeling and pharmacological studies. Eur J Med Chem 2014; 84:614-27. [DOI: 10.1016/j.ejmech.2014.07.060] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 07/11/2014] [Accepted: 07/16/2014] [Indexed: 01/27/2023]
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7
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Zhang MM, Yin MY, Wang XS. An Efficient Synthesis of Clopenta[ b]pyrazolo[4,3- f]quinolin-9(3 H)-one Derivatives by Three-component Reaction in Ionic Liquids. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1538] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mei-Mei Zhang
- Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province; Jiangsu Normal University; Xuzhou Jiangsu; 221116; People's Republic of China
| | - Ming-Yue Yin
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou Jiangsu; 221116; People's Republic of China
| | - Xiang-Shan Wang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou Jiangsu; 221116; People's Republic of China
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8
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Squarcialupi L, Colotta V, Catarzi D, Varano F, Filacchioni G, Varani K, Corciulo C, Vincenzi F, Borea PA, Ghelardini C, Di Cesare Mannelli L, Ciancetta A, Moro S. 2-Arylpyrazolo[4,3-d]pyrimidin-7-amino derivatives as new potent and selective human A3 adenosine receptor antagonists. Molecular modeling studies and pharmacological evaluation. J Med Chem 2013; 56:2256-69. [PMID: 23427825 DOI: 10.1021/jm400068e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
On the basis of our previously reported 2-arylpyrazolo[4,3-d]pyrimidin-7-ones, a set of 2-arylpyrazolo[4,3-d]pyrimidin-7-amines were designed as new human (h) A3 adenosine receptor (AR) antagonists. Lipophilic groups with different steric bulk were introduced at the 5-position of the bicyclic scaffold (R5 = Me, Ph, CH2Ph), and different acyl and carbamoyl moieties (R7) were appended on the 7-amino group, as well as a para-methoxy group inserted on the 2-phenyl ring. The presence of acyl groups turned out to be of paramount importance for an efficient and selective binding at the hA3 AR. In fact, most of the 7-acylamino derivatives showed low nanomolar affinity (Ki = 2.5-45 nM) and high selectivity toward this receptor. A few selected pyrazolo[4,3-d]pyrimidin-7-amides were effective in counteracting oxaliplatin-induced apoptosis in rat astrocyte cell cultures, an in vitro model of neurotoxicity. Through an in silico receptor-driven approach the obtained binding data were rationalized and the molecular bases of the observed hA3 AR affinity and hA3 versus hA2A AR selectivity were explained.
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Affiliation(s)
- Lucia Squarcialupi
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmaceutica e Nutraceutica, Università di Firenze, Via Ugo Schiff, 6, 50019 Sesto Fiorentino, Italy
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9
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Catarzi D, Colotta V, Varano F, Poli D, Squarcialupi L, Filacchioni G, Varani K, Vincenzi F, Borea PA, Dal Ben D, Lambertucci C, Cristalli G. Pyrazolo[1,5-c]quinazoline derivatives and their simplified analogues as adenosine receptor antagonists: Synthesis, structure–affinity relationships and molecular modeling studies. Bioorg Med Chem 2013; 21:283-94. [DOI: 10.1016/j.bmc.2012.10.031] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 10/03/2012] [Accepted: 10/14/2012] [Indexed: 11/26/2022]
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10
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Baraldi PG, Preti D, Borea PA, Varani K. Medicinal Chemistry of A3 Adenosine Receptor Modulators: Pharmacological Activities and Therapeutic Implications. J Med Chem 2012; 55:5676-703. [DOI: 10.1021/jm300087j] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Pier Giovanni Baraldi
- Dipartimento
di Scienze Farmaceutiche and ‡Dipartimento di Medicina Clinica e Sperimentale-Sezione
di Farmacologia, Università di Ferrara, 44121 Ferrara, Italy
| | - Delia Preti
- Dipartimento
di Scienze Farmaceutiche and ‡Dipartimento di Medicina Clinica e Sperimentale-Sezione
di Farmacologia, Università di Ferrara, 44121 Ferrara, Italy
| | - Pier Andrea Borea
- Dipartimento
di Scienze Farmaceutiche and ‡Dipartimento di Medicina Clinica e Sperimentale-Sezione
di Farmacologia, Università di Ferrara, 44121 Ferrara, Italy
| | - Katia Varani
- Dipartimento
di Scienze Farmaceutiche and ‡Dipartimento di Medicina Clinica e Sperimentale-Sezione
di Farmacologia, Università di Ferrara, 44121 Ferrara, Italy
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11
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Yin MY, Wang W, Zhang MM, Wang XS. Synthesis of 7-Aryl-9-Methyl-3h- Pyrazolo[4,3-f]Quinoline Derivatives Catalysed by Iodine. JOURNAL OF CHEMICAL RESEARCH 2011. [DOI: 10.3184/174751911x13148095775284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A mild and efficient method for the synthesis of 7-aryl-9-methyl-3H- pyrazolo[4,3-f]quinoline derivatives via a three-component reaction of an aromatic aldehyde, 1H-indazol-5-amine and acetone catalysed by iodine is described. This new procedure has the advantages of mild reaction conditions, high yields and a metal-free catalyst.
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Affiliation(s)
- Ming-Yue Yin
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Xuzhou Normal University, Xuzhou Jiangsu 221116, P. R. China
- The Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province, Xuzhou Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Wei Wang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Xuzhou Normal University, Xuzhou Jiangsu 221116, P. R. China
- The Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province, Xuzhou Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Mei-Mei Zhang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Xuzhou Normal University, Xuzhou Jiangsu 221116, P. R. China
- The Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province, Xuzhou Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Xiang-Shan Wang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Xuzhou Normal University, Xuzhou Jiangsu 221116, P. R. China
- The Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province, Xuzhou Normal University, Xuzhou Jiangsu 221116, P. R. China
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12
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Synthesis, structure–affinity relationships, and molecular modeling studies of novel pyrazolo[3,4-c]quinoline derivatives as adenosine receptor antagonists. Bioorg Med Chem 2011; 19:3757-68. [DOI: 10.1016/j.bmc.2011.05.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 04/28/2011] [Accepted: 05/01/2011] [Indexed: 11/18/2022]
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13
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Wang JF, Chou KC. Insights from modeling the 3D structure of New Delhi metallo-β-lactamse and its binding interactions with antibiotic drugs. PLoS One 2011; 6:e18414. [PMID: 21494599 PMCID: PMC3073942 DOI: 10.1371/journal.pone.0018414] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 03/04/2011] [Indexed: 11/18/2022] Open
Abstract
New Delhi metallo-beta-lactamase (NDM-1) is an enzyme that makes bacteria resistant to a broad range of beta-lactam antibiotic drugs. This is because it can inactivate most beta-lactam antibiotic drugs by hydrolyzing them. For in-depth understanding of the hydrolysis mechanism, the three-dimensional structure of NDM-1 was developed. With such a structural frame, two enzyme-ligand complexes were derived by respectively docking Imipenem and Meropenem (two typical beta-lactam antibiotic drugs) to the NDM-1 receptor. It was revealed from the NDM-1/Imipenem complex that the antibiotic drug was hydrolyzed while sitting in a binding pocket of NDM-1 formed by nine residues. And for the case of NDM-1/Meropenem complex, the antibiotic drug was hydrolyzed in a binding pocket formed by twelve residues. All these constituent residues of the two binding pockets were explicitly defined and graphically labeled. It is anticipated that the findings reported here may provide useful insights for developing new antibiotic drugs to overcome the resistance problem.
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Affiliation(s)
- Jing-Fang Wang
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Center for Bioinformation and Technology, Shanghai, China
- Gordon Life Science Institute, San Diego, California, United States of America
- * E-mail: (J-FW); (K-CC)
| | - Kuo-Chen Chou
- Gordon Life Science Institute, San Diego, California, United States of America
- * E-mail: (J-FW); (K-CC)
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14
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Poli D, Catarzi D, Colotta V, Varano F, Filacchioni G, Daniele S, Trincavelli L, Martini C, Paoletta S, Moro S. The identification of the 2-phenylphthalazin-1(2H)-one scaffold as a new decorable core skeleton for the design of potent and selective human A3 adenosine receptor antagonists. J Med Chem 2011; 54:2102-13. [PMID: 21401121 DOI: 10.1021/jm101328n] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Following a molecular simplification approach, we have identified the 2-phenylphthalazin-1(2H)-one (PHTZ) ring system as a new decorable core skeleton for the design of novel hA(3) adenosine receptor (AR) antagonists. Interest for this new series was driven by the structural similarity between the PHTZ skeleton and both the 2-aryl-1,2,4-triazolo[4,3-a]quinoxalin-1-one (TQX) and the 4-carboxamido-quinazoline (QZ) scaffolds extensively investigated in our previously reported studies. Our attention was focused at position 4 of the phthalazine nucleus where different amido and ureido moieties were introduced (compounds 2-20). Some of the new PHTZ compounds showed high hA(3) AR affinity and selectivity, the 2,5-dimethoxyphenylphthalazin-1(2H)-one 18 being the most potent and selective hA(3) AR antagonist among this series (K(i) = 0.776 nM; hA(1)/hA(3) and hA(2A)/hA(3) > 12000). Molecular docking studies on the PHTZ derivatives revealed for these compounds a binding mode similar to that of the previously reported TQX and QZ series, as was expected from the simplification approach.
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Affiliation(s)
- Daniela Poli
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Firenze, Polo Scientifico, Via U. Schiff, 6-50019 Sesto Fiorentino (Firenze), Italy
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15
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Voight EA, Daanen JF, Kort ME. Synthesis of Oxazolo[4,5-c]quinoline TRPV1 Antagonists. J Org Chem 2010; 75:8713-5. [DOI: 10.1021/jo101938b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Eric A. Voight
- Global Pharmaceutical Research and Development, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064, United States
| | - Jerome F. Daanen
- Global Pharmaceutical Research and Development, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064, United States
| | - Michael E. Kort
- Global Pharmaceutical Research and Development, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064, United States
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16
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Eswaran S, Adhikari AV, Ajay Kumar R. New 1,3-oxazolo[4,5-c]quinoline derivatives: Synthesis and evaluation of antibacterial and antituberculosis properties. Eur J Med Chem 2010; 45:957-66. [PMID: 20034708 DOI: 10.1016/j.ejmech.2009.11.036] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Revised: 11/15/2009] [Accepted: 11/20/2009] [Indexed: 10/20/2022]
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17
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Lenzi O, Colotta V, Catarzi D, Varano F, Poli D, Filacchioni G, Varani K, Vincenzi F, Borea PA, Paoletta S, Morizzo E, Moro S. 2-Phenylpyrazolo[4,3-d]pyrimidin-7-one as a new scaffold to obtain potent and selective human A3 adenosine receptor antagonists: new insights into the receptor-antagonist recognition. J Med Chem 2009; 52:7640-52. [PMID: 19743865 DOI: 10.1021/jm900718w] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A molecular simplification approach of previously reported 2-arylpyrazolo[3,4-c]quinolin-4-ones was applied to design 2-arylpyrazolo[4,3-d]pyrimidin-7-one derivatives as new human A(3) adenosine receptor antagonists. Substituents with different lipophilicity and steric hindrance were introduced at the 5-position of the bicyclic scaffold (R(5) = H, Me, Et, Ph, CH(2)Ph) and on the 2-phenyl ring (OMe, Me). Most of the synthesized derivatives were highly potent hA(3) adenosine receptor antagonists, the best being the 2-(4-methoxyphenyl)pyrazolo[4,3-d]pyrimidin-7-one (K(i) = 1.2 nM). The new compounds were also highly selective, being completely devoid of affinity toward hA(1), hA(2A), and hA(2B) adenosine receptors. On the basis of the recently published human A(2A) receptor crystallographic information, we propose a novel receptor-driven hypothesis to explain both A(3) AR affinity and A(3) versus A(2A) selectivity profiles of these new antagonists.
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Affiliation(s)
- Ombretta Lenzi
- Dipartimento di Scienze Farmaceutiche, Laboratorio di Progettazione, Sintesi e Studio di Eterocicli Biologicamente Attivi, Università di Firenze, Polo Scientifico, Via Ugo Schiff, 6, 50019 Sesto Fiorentino, Italy
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18
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Wang JF, Wei DQ, Chou KC. Insights from investigating the interactions of adamantane-based drugs with the M2 proton channel from the H1N1 swine virus. Biochem Biophys Res Commun 2009; 388:413-7. [PMID: 19665993 DOI: 10.1016/j.bbrc.2009.08.026] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2009] [Accepted: 08/04/2009] [Indexed: 11/28/2022]
Abstract
The M2 proton channel is one of indispensable components for the influenza A virus that plays a vital role in its life cycle and hence is an important target for drug design against the virus. In view of this, the three-dimensional structure of the H1N1-M2 channel was developed based on the primary sequence taken from a patient recently infected by the H1N1 (swine flu) virus. With an explicit water-membrane environment, molecular docking studies were performed for amantadine and rimantadine, the two commercial drugs generally used to treat influenza A infection. It was found that their binding affinity to the H1N1-M2 channel is significantly lower than that to the H5N1-M2 channel, fully consistent with the recent report that the H1N1 swine virus was resistant to the two drugs. The findings and the relevant analysis reported here might provide useful structural insights for developing effective drugs against the new swine flu virus.
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Affiliation(s)
- Jing-Fang Wang
- College of Life Science and Biotechnology, Shanghai Jiaotong University, Shanghai 200240, China
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19
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Design, synthesis and evaluation of aspirin analogues having an additional carboxylate substituent for antithrombotic activity. Bioorg Med Chem Lett 2009; 19:4213-6. [DOI: 10.1016/j.bmcl.2009.05.120] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2009] [Revised: 05/22/2009] [Accepted: 05/27/2009] [Indexed: 11/21/2022]
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