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Ghozlan SA, Abdelmoniem DM, Hassaneen HM, Abdelmoniem AM, Abdelhamid IA. Cyclic Enaminone Incorporating 5-cyanomethylpyrazole-4-carbonitrile: Unexpected Formation of Pyrazolo[l,5- a]pyridine Derivatives. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Said A.S. Ghozlan
- Department of Chemistry, Faculty of Science; Cairo University; Giza 12613 Egypt
| | - Doaa M. Abdelmoniem
- Department of Chemistry, Faculty of Science; Cairo University; Giza 12613 Egypt
| | - Hamdi M. Hassaneen
- Department of Chemistry, Faculty of Science; Cairo University; Giza 12613 Egypt
| | - Amr M. Abdelmoniem
- Department of Chemistry, Faculty of Science; Cairo University; Giza 12613 Egypt
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2
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Akhtar W, Shaquiquzzaman M, Akhter M, Verma G, Khan MF, Alam MM. The therapeutic journey of pyridazinone. Eur J Med Chem 2016; 123:256-281. [DOI: 10.1016/j.ejmech.2016.07.061] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Revised: 07/20/2016] [Accepted: 07/24/2016] [Indexed: 11/17/2022]
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Abstract
Azomethine imines are considered 1,3-dipoles of the aza-allyl type which are transient intermediates and should be generated in situ but can also be stable and isolable compounds. They react with electron-rich and electron-poor olefins as well as with acetylenic compounds and allenoates mainly by a [3 + 2] cycloaddition but they can also take part in [3 + 3], [4 + 3], [3 + 2 + 2] and [5 + 3] with different dipolarophiles. These 1,3-dipolar cycloadditions (1,3-DC) can be performed not only under thermal or microwave conditions but also using metallo- and organocatalytic systems. In recent years enantiocatalyzed 1,3-dipolar cycloadditions have been extensively considered and applied to the synthesis of a great variety of dinitrogenated heterocycles with biological activity. Acyclic azomethine imines derived from mono and disubstituted hydrazones could be generated by prototropy under heating or by using Lewis or Brønsted acids to give, after [3 + 2] cycloadditions, pyrazolidines and pyrazolines. Cyclic azomethine imines, incorporating a C-N bond in a ring, such as isoquinolinium imides are the most widely used dipoles in normal and inverse-electron demand 1,3-DC allowing the synthesis of tetrahydro-, dihydro- and unsaturated pyrazolo[1,5-a]isoquinolines in racemic and enantioenriched forms with interesting biological activity. Pyridinium and quinolinium imides give the corresponding pyrazolopyridines and indazolo[3,2-a]isoquinolines, respectively. In the case of cyclic azomethine imines with an N-N bond incorporated into a ring, N-alkylidene-3-oxo-pyrazolidinium ylides are the most popular stable and isolated dipoles able to form dinitrogen-fused saturated and unsaturated pyrazolopyrazolones as racemic or enantiomerically enriched compounds present in many pharmaceuticals, agrochemicals and other useful chemicals.
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Affiliation(s)
- Carmen Nájera
- Departamento de Química Orgánica, Facultad de Ciencias, and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
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4
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Synthesis of 5-cyanopyrazolo[1,5-a]pyridine derivatives via tandem reaction and their optical properties. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.124] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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5
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Siciliano C, De Marco R, Guidi LE, Spinella M, Liguori A. A One-Pot Procedure for the Preparation of N-9-Fluorenylmethyloxycarbonyl-α-amino Diazoketones from α-Amino Acids. J Org Chem 2012; 77:10575-82. [DOI: 10.1021/jo301657e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Carlo Siciliano
- Dipartimento di Scienze Farmaceutiche,
Edificio Polifunzionale, Università della Calabria, I-87030 Arcavacata
di Rende, Cosenza, Italy
| | - Rosaria De Marco
- Dipartimento di Scienze Farmaceutiche,
Edificio Polifunzionale, Università della Calabria, I-87030 Arcavacata
di Rende, Cosenza, Italy
| | - Ludovica Evelin Guidi
- Dipartimento di Scienze Farmaceutiche,
Edificio Polifunzionale, Università della Calabria, I-87030 Arcavacata
di Rende, Cosenza, Italy
| | - Mariagiovanna Spinella
- Dipartimento di Scienze Farmaceutiche,
Edificio Polifunzionale, Università della Calabria, I-87030 Arcavacata
di Rende, Cosenza, Italy
| | - Angelo Liguori
- Dipartimento di Scienze Farmaceutiche,
Edificio Polifunzionale, Università della Calabria, I-87030 Arcavacata
di Rende, Cosenza, Italy
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Harvey AL, Young LC, Kornisiuk E, Snitcofsky M, Colettis N, Blanco C, Jerusalinsky D, Jamieson AG, Hartley RC, Stone TW. A novel dihydro-pyrazolo(3,4d)(1,2,4)triazolo(1,5a)pyrimidin-4-one (AJ23) is an antagonist at adenosine A1 receptors and enhances consolidation of step-down avoidance. Behav Brain Res 2012; 234:184-91. [DOI: 10.1016/j.bbr.2012.06.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 06/18/2012] [Accepted: 06/20/2012] [Indexed: 01/24/2023]
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8
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Synthesis and antibacterial activity of some novel pyrazolopyridine derivatives. Chem Heterocycl Compd (N Y) 2011. [DOI: 10.1007/s10593-011-0699-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wang JW, Ge YQ, Li Y, Jia J, Yin L. A Novel and Efficient Approach to Pyrazolo[1,5-a]pyridine Derivatives via One-Pot Tandem Reaction. HETEROCYCLES 2009. [DOI: 10.3987/com-08-11510] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Johnston KA, Allcock RW, Jiang Z, Collier ID, Blakli H, Rosair GM, Bailey PD, Morgan KM, Kohno Y, Adams DR. Concise routes to pyrazolo[1,5-a]pyridin-3-yl pyridazin-3-ones. Org Biomol Chem 2008; 6:175-86. [DOI: 10.1039/b713638b] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Harju K, Kylänlahti I, Paananen T, Polamo M, Nielsen J, Yli-Kauhaluoma J. Solid-Phase Synthesis of Pyrazolopyridines from Polymer-Bound Alkyne and Azomethine Imines. ACTA ACUST UNITED AC 2006; 8:344-9. [PMID: 16677003 DOI: 10.1021/cc050138j] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Study was made of the 1,3-dipolar cycloaddition of polymer-bound alkynes to azomethine imines generated in situ from N-aminopyridine iodides. Aromatization of the cycloadducts gives polymer-bound pyrazolopyridines that can be released from the resin as carboxylic acids with trifluoroacetic acid or as methyl esters with sodium methoxide.
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Affiliation(s)
- Kirsi Harju
- Division of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Helsinki, Finland
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Moro S, Gao ZG, Jacobson KA, Spalluto G. Progress in the pursuit of therapeutic adenosine receptor antagonists. Med Res Rev 2006; 26:131-59. [PMID: 16380972 PMCID: PMC9194718 DOI: 10.1002/med.20048] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Ever since the discovery of the hypotensive and bradycardiac effects of adenosine, adenosine receptors continue to represent promising drug targets. First, this is due to the fact that the receptors are expressed in a large variety of tissues. In particular, the actions of adenosine (or methylxanthine antagonists) in the central nervous system, in the circulation, on immune cells, and on other tissues can be beneficial in certain disorders. Second, there exists a large number of ligands, which have been generated by introducing several modifications in the structure of the lead compounds (adenosine and methylxanthine), some of them highly specific. Four adenosine receptor subtypes (A1, A2A, A2B, and A3) have been cloned and pharmacologically characterized, all of which are G protein-coupled receptors. Adenosine receptors can be distinguished according to their preferred mechanism of signal transduction: A1 and A3 receptors interact with pertussis toxin-sensitive G proteins of the Gi and Go family; the canonical signaling mechanism of the A2A and of the A2B receptors is stimulation of adenylyl cyclase via Gs proteins. In addition to the coupling to adenylyl cyclase, all four subtypes may positively couple to phospholipase C via different G protein subunits. The development of new ligands, in particular, potent and selective antagonists, for all subtypes of adenosine receptors has so far been directed by traditional medicinal chemistry. The availability of genetic information promises to facilitate understanding of the drug-receptor interaction leading to the rational design of a potentially therapeutically important class of drugs. Moreover, molecular modeling may further rationalize observed interactions between the receptors and their ligands. In this review, we will summarize the most relevant progress in developing new therapeutic adenosine receptor antagonists.
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Affiliation(s)
- Stefano Moro
- Molecular Modeling Section, Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy.
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Chang LCW, Brussee J, Ijzerman AP. Non-Xanthine Antagonists for the Adenosine A1 Receptor. Chem Biodivers 2004; 1:1591-626. [PMID: 17191804 DOI: 10.1002/cbdv.200490122] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lisa C W Chang
- Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, P.O. Box 9502, NL-2300 RA Leiden
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González MP, del Carmen Terán Moldes M. A TOPS-MODE approach to predict affinity for A1 adenosine receptors. 2-(Arylamino)adenosine analogues. Bioorg Med Chem 2004; 12:2985-93. [PMID: 15142557 DOI: 10.1016/j.bmc.2004.03.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2003] [Revised: 03/01/2004] [Accepted: 03/14/2004] [Indexed: 11/26/2022]
Abstract
The TOPological Sub-Structural Molecular Design (TOPS-MODE) approach has been applied to the study of the affinity of A(1) adenosine receptor of different 2-(arylamino)adenosine analogues. A model able to describe closed to 79% of the variance in the values for binding experiments of 32 analogues of these compounds through multilinear regression analysis (MRA) was developed with the use of the mentioned approach. In contrast, no one of seven different approaches, including the use of Constitutional, Topological, Molecular walk counts, BCUT, Randic Molecular profiles, Geometrical, and RDF descriptors was able to explain more than 70% of the variance in the mentioned property with the same number of descriptors. In addition, the TOPS-MODE approach permitted to find the contribution of different fragments to the biological property giving to the model a straightforward structural interpretability.
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Affiliation(s)
- Maykel Pérez González
- Services Unit, Drug Design Department, Experimental Sugar Cane Station, Villa Clara-Cienfuegos, Ranchuelo, Cuba.
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Hansch C, Garg R, Kurup A, Mekapati SB. Allosteric interactions and QSAR: on the role of ligand hydrophobicity. Bioorg Med Chem 2003; 11:2075-84. [PMID: 12670658 DOI: 10.1016/s0968-0896(03)00056-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A study of a very large database of QSAR (9100) has uncovered a few unusual examples where as one increases the hydrophobicity of the members of a set of congeners, activity decreases until at a certain point, activity begins to increase. Obviously a change in mechanism is involved. The only way we have found to rationalize this unusual event is by a change in the structure of the receptor. We have found this to occur with hemoglobin, a substance first used to define allosteric reactions.
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Affiliation(s)
- Corwin Hansch
- Department of Chemistry, Pomona College, 645North College Avenue, Claremont, CA 91711, USA.
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Bondavalli F, Botta M, Bruno O, Ciacci A, Corelli F, Fossa P, Lucacchini A, Manetti F, Martini C, Menozzi G, Mosti L, Ranise A, Schenone S, Tafi A, Trincavellic ML. Synthesis, molecular modeling studies, and pharmacological activity of selective A(1) receptor antagonists. J Med Chem 2002; 45:4875-87. [PMID: 12383013 DOI: 10.1021/jm0209580] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a combined computational study aimed at identifying the three-dimensional structural properties required for different classes of compounds to show antagonistic activity toward the A(1) adenosine receptor (AR). Particularly, an approach combining pharmacophore mapping, molecular alignment, and pseudoreceptor generation was applied to derive a hypothesis of the interaction pathway between a set of A(1) AR antagonists taken from the literature and a model of the putative A(1) receptor. The pharmacophore model consists of seven features and represents an improvement of the N(6)-C8 model, generally reported as the most probable pharmacophore model for A(1) AR agonists and antagonists. It was used to build up a pseudoreceptor model able to rationalize the relationships between structural properties and biological data of, and external to, the training set. In fact, to further assess its statistical significance and predictive power, the pseudoreceptor was employed to predict the free energy of binding associated with compounds constituting a test set. While part of these molecules was also taken from the literature, the remaining compounds were designed and synthesized by our research group. All of the new compounds were tested for their affinity toward A(1), A(2a), and A(3) AR, showing interesting antagonistic activity and A(1) selectivity.
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Affiliation(s)
- Francesco Bondavalli
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Genova, Viale Benedetto XV n.3, I-16132 Genova, Italy
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Cesar J, Sollner Dolenc M. Trimethylsilyldiazomethane in the preparation of diazoketones via mixed anhydride and coupling reagent methods: a new approach to the Arndt–Eistert synthesis. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01458-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kuroda S, Takamura F, Tenda Y, Itani H, Tomishima Y, Akahane A, Sakane K. Design, synthesis and biological evaluation of a novel series of potent, orally active adenosine A1 receptor antagonists with high blood-brain barrier permeability. Chem Pharm Bull (Tokyo) 2001; 49:988-98. [PMID: 11515591 DOI: 10.1248/cpb.49.988] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A novel series of 3-(2-substituted-3-oxo-2,3-dihydropyridazin-6-yl)-2-phenylpyrazolo[1,5-a]pyridines (5-38) were synthesized and evaluated for their in vitro adenosine A1 and A(2A) receptor binding activities, and in vitro metabolism by rat liver in order to search for orally active compounds. Most of the test compounds were potent adenosine A1 receptor antagonists with high A1 selectivity and the A1 affinity and A1 selectivity of carbonyl derivatives (5-11) was particularly high. In particular, compound 7 was an extremely potent and selective adenosine A1 antagonist with high A1 selectivity (Ki=0.026 nM, A(2A)/A1=5400). In terms of metabolic stability, 2-oxopropyl (5), 2-hydroxypropyl (12), N-methylacetamide (16), 2-(piperidin-1-yl)ethyl (28) and 1-methylpiperidin-4-yl (32, FR194921) were the most stable compounds in this series of analogues. Further in vivo evaluation indicated that compounds 5, 13, 17, 28 and 32 were detected in both plasma and brain after oral administration in rats. In particular, 32 displayed good plasma and brain concentrations (dose: 32 mg/kg (n=3); after 30 min, plasma conc.=3390+/-651nM, brain conc.=3670+/-496nM; after 60min, plasma conc.=1580+/-348nM, brain conc.=2143+/-434nM), and a good brain/plasma ratio (1.11+/-0.060 (30min), 1.39+/-0.172 (60min)). As a result, we could show that 32 is a good candidate for an orally active adenosine A1 receptor antagonist with high blood-brain barrier permeability and good bioavailability (Ki=6.6nM, A(2A)/A1=820, BA=60.6+/-4.9% (32 mg/kg)).
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Affiliation(s)
- S Kuroda
- Medicinal Chemistry Research Laboratories, Fujisawa Pharmaceutical Co., Ltd., Osaka-shi, Japan.
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