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Vega Alanis BA, Wimmer L, Ernst M, Schnürch M, Mihovilovic MD. Novel pyrazolothienopyridinones as potential GABA A receptor modulators. MONATSHEFTE FUR CHEMIE 2023; 154:1427-1439. [PMID: 38020488 PMCID: PMC10667146 DOI: 10.1007/s00706-023-03063-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 03/21/2023] [Indexed: 12/01/2023]
Abstract
The synthesis of novel pyrazolothienopyridinone derivatives as potential GABAA receptor modulators was performed and is herein described. A crucial step of the synthesis involving handling unstable aminothiophenes was managed via two different synthetic strategies delivering a set of 8 target compounds. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s00706-023-03063-6.
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Affiliation(s)
| | - Laurin Wimmer
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060 Vienna, Austria
| | - Margot Ernst
- Center for Brain Research, Medical University of Vienna, Spitalgasse 4, 1090 Vienna, Austria
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060 Vienna, Austria
| | - Marko D. Mihovilovic
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060 Vienna, Austria
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2
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Mu Y, Iqbal Z, Jiang R, Hou J, Yang Z, Li H, Tang D. Synthesis of Fused pyrazolo[4,3‐
c
]quinolines through KI‐Promoted Cyclization of Pyrazole‐arylamines and Benzyl Bromide. ChemistrySelect 2022. [DOI: 10.1002/slct.202104337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Yangxiu Mu
- Ningxia Center of Agricultural Organic Synthesis Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry Science Yinchuan 750002 P. R. China
| | - Zafar Iqbal
- Ningxia Center of Agricultural Organic Synthesis Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry Science Yinchuan 750002 P. R. China
| | - Rui Jiang
- Ningxia Center of Agricultural Organic Synthesis Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry Science Yinchuan 750002 P. R. China
| | - Jing Hou
- Ningxia Center of Agricultural Organic Synthesis Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry Science Yinchuan 750002 P. R. China
| | - Zhixiang Yang
- Ningxia Center of Agricultural Organic Synthesis Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry Science Yinchuan 750002 P. R. China
| | - Hongjun Li
- National Measurement and Testing Center for Coal Chemical industry Ningxia Academy of Metrology & Quality Inspection Yinchuan 750002 P. R. China
| | - Dong Tang
- Ningxia Center of Agricultural Organic Synthesis Agricultural Resource and Environment Institute of Ningxia Academy of Agriculture and Forestry Science Yinchuan 750002 P. R. China
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3
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Elshaier YAMM, Aly AA, El-Aziz MA, Fathy HM, Brown AB, Ramadan M. A review on the synthesis of heteroannulated quinolones and their biological activities. Mol Divers 2021; 26:2341-2370. [PMID: 34698911 DOI: 10.1007/s11030-021-10332-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 09/30/2021] [Indexed: 10/20/2022]
Abstract
The quinoline scaffold has become an important construction motif for the development of new drugs. The quinolones and their heteroannulated derivatives have high importance due to their diverse spectrum of biological activities as antifungal, anti-inflammatory, anti-diabetes, anti-Alzheimer's disease, antioxidant and diuretic activities. This review summarizes the various new, efficient and convenient synthetic approaches to synthesize diverse quinolone-based scaffolds and their biological activities. We also dealt with the important mechanism, the route and type of reactions of the obtained products. The biological activities of some heteroannulated quinolones were also discussed.
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Affiliation(s)
- Yaseen A M M Elshaier
- Organic & Medicinal Chemistry Department, Faculty of Pharmacy, University of Sadat City, Menoufia, 32958, Egypt
| | - Ashraf A Aly
- Chemistry Department, Faculty of Science, Minia University, El-Minia, 61519, Egypt.
| | - Mohamed Abd El-Aziz
- Medicinal Chemistry Department, Faculty of Pharmacy, Minia University, El-Minia, 61519, Egypt
| | - Hazem M Fathy
- Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, 71524, Egypt
| | - Alan B Brown
- Chemistry Department, Florida Institute of Technology, Melbourne, FL, 32901, USA
| | - Mohamed Ramadan
- Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, 71524, Egypt
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4
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Blom AEM, Su JY, Repka LM, Reisman SE, Dougherty DA. Synthesis and Biological Evaluation of Pyrroloindolines as Positive Allosteric Modulators of the α1β2γ2 GABA A Receptor. ACS Med Chem Lett 2020; 11:2204-2211. [PMID: 33214830 DOI: 10.1021/acsmedchemlett.0c00340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 09/15/2020] [Indexed: 12/21/2022] Open
Abstract
γ-Aminobutyric acid type A (GABAA) receptors are key mediators of central inhibitory neurotransmission and have been implicated in several disorders of the central nervous system. Some positive allosteric modulators (PAMs) of this receptor provide great therapeutic benefits to patients. However, adverse effects remain a challenge. Selective targeting of GABAA receptors could mitigate this problem. Here, we describe the synthesis and functional evaluation of a novel series of pyrroloindolines that display significant modulation of the GABAA receptor, acting as PAMs. We found that halogen incorporation at the C5 position greatly increased the PAM potency relative to the parent ligand, while substitutions at other positions generally decreased potency. Mutagenesis studies suggest that the binding site lies at the top of the transmembrane domain.
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Affiliation(s)
- Annet E M Blom
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Justin Y Su
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Lindsay M Repka
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Sarah E Reisman
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Dennis A Dougherty
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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5
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Taliani S, Da Settimo F, Martini C, Laneri S, Novellino E, Greco G. Exploiting the Indole Scaffold to Design Compounds Binding to Different Pharmacological Targets. Molecules 2020; 25:molecules25102331. [PMID: 32429433 PMCID: PMC7287756 DOI: 10.3390/molecules25102331] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 12/14/2022] Open
Abstract
Several indole derivatives have been disclosed by our research groups that have been collaborating for nearly 25 years. The results of our investigations led to a variety of molecules binding selectively to different pharmacological targets, specifically the type A γ-aminobutyric acid (GABAA) chloride channel, the translocator protein (TSPO), the murine double minute 2 (MDM2) protein, the A2B adenosine receptor (A2B AR) and the Kelch-like ECH-associated protein 1 (Keap1). Herein, we describe how these works were conceived and carried out thanks to the versatility of indole nucleus to be exploited in the design and synthesis of drug-like molecules.
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Affiliation(s)
- Sabrina Taliani
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126 Pisa, Italy; (F.D.S.); (C.M.)
- Correspondence: (S.T.); (G.G.); Tel.: +39-050-2219547 (S.T.); +39-081-678645 (G.G.)
| | - Federico Da Settimo
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126 Pisa, Italy; (F.D.S.); (C.M.)
| | - Claudia Martini
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126 Pisa, Italy; (F.D.S.); (C.M.)
| | - Sonia Laneri
- Department of Pharmacy, University of Naples “Federico II”, Via D. Montesano, 49, 80131 Naples, Italy; (S.L.); (E.N.)
| | - Ettore Novellino
- Department of Pharmacy, University of Naples “Federico II”, Via D. Montesano, 49, 80131 Naples, Italy; (S.L.); (E.N.)
| | - Giovanni Greco
- Department of Pharmacy, University of Naples “Federico II”, Via D. Montesano, 49, 80131 Naples, Italy; (S.L.); (E.N.)
- Correspondence: (S.T.); (G.G.); Tel.: +39-050-2219547 (S.T.); +39-081-678645 (G.G.)
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6
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Vega Alanis BA, Iorio MT, Silva LL, Bampali K, Ernst M, Schnürch M, Mihovilovic MD. Allosteric GABA A Receptor Modulators-A Review on the Most Recent Heterocyclic Chemotypes and Their Synthetic Accessibility. Molecules 2020; 25:E999. [PMID: 32102309 PMCID: PMC7070463 DOI: 10.3390/molecules25040999] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 11/17/2022] Open
Abstract
GABAA receptor modulators are structurally almost as diverse as their target protein. A plethora of heterocyclic scaffolds has been described as modulating this extremely important receptor family. Some made it into clinical trials and, even on the market, some were dismissed. This review focuses on the synthetic accessibility and potential for library synthesis of GABAA receptor modulators containing at least one heterocyclic scaffold, which were disclosed within the last 10 years.
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Affiliation(s)
- Blanca Angelica Vega Alanis
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/193, 1060 Vienna, Austria; (B.A.V.A.); (M.T.I.); (M.D.M.)
| | - Maria Teresa Iorio
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/193, 1060 Vienna, Austria; (B.A.V.A.); (M.T.I.); (M.D.M.)
| | - Luca L. Silva
- Department of Anesthesiology and Intensive Care Medicine, Charité–Universitätsmedizin, Charitéplatz 1, 10117 Berlin, Germany;
| | - Konstantina Bampali
- Department of Molecular Neurosciences, Center for Brain Research, Medical University of Vienna, Spitalgasse 4, 1090 Vienna, Austria;
| | - Margot Ernst
- Department of Molecular Neurosciences, Center for Brain Research, Medical University of Vienna, Spitalgasse 4, 1090 Vienna, Austria;
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/193, 1060 Vienna, Austria; (B.A.V.A.); (M.T.I.); (M.D.M.)
| | - Marko D. Mihovilovic
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/193, 1060 Vienna, Austria; (B.A.V.A.); (M.T.I.); (M.D.M.)
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7
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Li J, Wu X, Shi Q, Li C, Chen X. Effects of hydroxybutyl chitosan on improving immunocompetence and antibacterial activities. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110086. [DOI: 10.1016/j.msec.2019.110086] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 08/14/2019] [Accepted: 08/14/2019] [Indexed: 01/31/2023]
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8
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Iorio MT, Rehman S, Bampali K, Stoeger B, Schnürch M, Ernst M, Mihovilovic MD. Variations on a scaffold - Novel GABA A receptor modulators. Eur J Med Chem 2019; 180:340-349. [PMID: 31325782 DOI: 10.1016/j.ejmech.2019.07.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 07/02/2019] [Accepted: 07/02/2019] [Indexed: 11/24/2022]
Abstract
Allosteric ligands of GABAA receptors exist in many different chemotypes owing to their great usefulness as therapeutics, with benzodiazepines being among the best known examples. Many allosteric binding sites have been described, among them a site at the extracellular interface between the alpha principal face and the beta complementary face (α+/β-). Pyrazoloquinolinones have been shown to bind at α+/β-binding sites of GABAA receptors, exerting chiefly positive allosteric modulation at this location. In order to further explore molecular determinants of this type of allosteric modulation, we synthesized a library of ligands based on the PQ pharmacophore employing a ring-chain bioisosteric approach. In this study we analyzed the structure-activity-relationship (SAR) of these novel ligands based on an azo-biaryl structural motif in α1β3 GABAA receptors, indicating interesting novel properties of the compound class.
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Affiliation(s)
- Maria Teresa Iorio
- TU Wien, Institute of Applied Synthetic Chemistry, Getreidemarkt 9/163-OC, 1060, Vienna, Austria.
| | - Sabah Rehman
- Medical University of Vienna, Center for Brain Research, Spitalgasse 4, 1090, Vienna, Austria.
| | - Konstantina Bampali
- Medical University of Vienna, Center for Brain Research, Spitalgasse 4, 1090, Vienna, Austria.
| | - Berthold Stoeger
- TU Wien, Institute of Applied Synthetic Chemistry, Getreidemarkt 9/163-OC, 1060, Vienna, Austria.
| | - Michael Schnürch
- TU Wien, Institute of Applied Synthetic Chemistry, Getreidemarkt 9/163-OC, 1060, Vienna, Austria.
| | - Margot Ernst
- Medical University of Vienna, Center for Brain Research, Spitalgasse 4, 1090, Vienna, Austria.
| | - Marko D Mihovilovic
- TU Wien, Institute of Applied Synthetic Chemistry, Getreidemarkt 9/163-OC, 1060, Vienna, Austria.
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9
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Simeone X, Iorio M, Siebert D, Rehman S, Schnürch M, Mihovilovic M, Ernst M. Defined concatenated α6α1β3γ2 GABAA receptor constructs reveal dual action of pyrazoloquinolinone allosteric modulators. Bioorg Med Chem 2019; 27:3167-3178. [DOI: 10.1016/j.bmc.2019.06.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 05/08/2019] [Accepted: 06/03/2019] [Indexed: 12/20/2022]
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10
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Solomon VR, Tallapragada VJ, Chebib M, Johnston G, Hanrahan JR. GABA allosteric modulators: An overview of recent developments in non-benzodiazepine modulators. Eur J Med Chem 2019; 171:434-461. [DOI: 10.1016/j.ejmech.2019.03.043] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 02/17/2019] [Accepted: 03/17/2019] [Indexed: 01/13/2023]
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11
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Vila C, Dharmaraj NR, Faubel A, Blay G, Cardona ML, Muñoz MC, Pedro JR. Regio-, Diastereo-, and Enantioselective Organocatalytic Addition of 4-Substituted Pyrazolones to Isatin-Derived Nitroalkenes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900328] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Carlos Vila
- Departament de Química Orgànica; Facultat de Química; Universitat de València; Dr. Moliner 50 46100 Burjassot València Spain
| | - Nisshanth Raj Dharmaraj
- Departament de Química Orgànica; Facultat de Química; Universitat de València; Dr. Moliner 50 46100 Burjassot València Spain
| | - Antonio Faubel
- Departament de Química Orgànica; Facultat de Química; Universitat de València; Dr. Moliner 50 46100 Burjassot València Spain
| | - Gonzalo Blay
- Departament de Química Orgànica; Facultat de Química; Universitat de València; Dr. Moliner 50 46100 Burjassot València Spain
| | - M. Luz Cardona
- Departament de Química Orgànica; Facultat de Química; Universitat de València; Dr. Moliner 50 46100 Burjassot València Spain
| | - M. Carmen Muñoz
- Departament de Física Aplicada; Universitat Politècnica de València; Camino de Vera s/n 46022 València Spain
| | - José R. Pedro
- Departament de Química Orgànica; Facultat de Química; Universitat de València; Dr. Moliner 50 46100 Burjassot València Spain
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12
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Vila C, Slack S, Blay G, Muñoz MC, Pedro JR. Regio‐ and Stereoselective Synthesis of 3‐Pyrazolylidene‐2‐oxindole Compounds by Nucleophilic Vinylic Substitution of (
E
)‐3‐(Nitromethylene)indolin‐2‐one. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Carlos Vila
- Departament de Química Orgànica, Facultat de QuímicaUniversitat de València Dr. Moliner 50 46100 Burjassot València Spain
| | - Sophie Slack
- Departament de Química Orgànica, Facultat de QuímicaUniversitat de València Dr. Moliner 50 46100 Burjassot València Spain
| | - Gonzalo Blay
- Departament de Química Orgànica, Facultat de QuímicaUniversitat de València Dr. Moliner 50 46100 Burjassot València Spain
| | - M. Carmen Muñoz
- Departament de Física AplicadaUniversitat Politècnica de València Camino de Vera s/n 46022 València Spain
| | - José R. Pedro
- Departament de Química Orgànica, Facultat de QuímicaUniversitat de València Dr. Moliner 50 46100 Burjassot València Spain
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Shaik A, Agarwal HK, Bhakuni R, Kirubakaran S. Novel Pyrazolo[4, 3-c]Quinolin-3-One Derivatives as PDE5A Inhibitors. Curr Top Med Chem 2019; 19:305-315. [PMID: 30747070 DOI: 10.2174/1568026619666190208164402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 01/29/2019] [Accepted: 02/07/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND PDE5A is a phosphodiesterase which specifically hydrolyzes the cGMP to GMP. It takes part in several physiological and pathological pathways and is considered an important drug target. Currently, PDE5 inhibitors (ex; Sildenafil, Tadalafil) available in the market are not only being used for the treatment of erectile dysfunction but at the same time, they are also in clinical trials being investigated as anticancer agents. MATERIALS & METHODS In this work, we have examined pyrazolo [4,3-c]quinolin-3-ones as PDE5A inhibitors. Pyrazolo [4,3-c]quinolin-3-ones are the class of tricyclic heterocyclic derivatives having a variety of therapeutically interesting drug candidates known for their anti-inflammatory, anti-viral, anti-anxiety and anti-cancer activity. Therefore, synthetic methods providing access to pyrazolo [4, 3-c] quinolin-3-ones are immensely valuable. Here, we are reporting a simple but efficient route for the synthesis of novel 8-morpholino-2-aryl - 2, 5-dihydro-3H-pyrazolo [4, 3-c] quinolin-3-one derivatives. RESULTS Further, molecular docking studies of synthesized compounds with human PDE5A protein showed that all the compounds exhibited good docking score in comparison with known inhibitors. In addition, all the synthesized molecules were evaluated against HCT116 cell lines for their antitumor activity. CONCLUSION Among all the synthesized compounds, compound 5a, 5d, and 6e showed better cytotoxicity. Thus, these derivatives can be studied as potential inhibitors of PDE5A.
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Affiliation(s)
- Althaf Shaik
- Discipline of Chemistry, Indian Institute of Technology Gandhinagar, Gujarat-382355, India
| | - Harshit K Agarwal
- Discipline of Chemistry, Indian Institute of Technology Gandhinagar, Gujarat-382355, India
| | - Rashmi Bhakuni
- Discipline of Biological Engineering, Indian Institute of Technology Gandhinagar, Gujarat-382355, India
| | - Sivapriya Kirubakaran
- Discipline of Chemistry, Indian Institute of Technology Gandhinagar, Gujarat-382355, India.,Discipline of Biological Engineering, Indian Institute of Technology Gandhinagar, Gujarat-382355, India
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14
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Synthesis and pharmacological evaluation of pyrazolo[4,3-c]quinolinones as high affinity GABAA-R ligands and potential anxiolytics. Bioorg Med Chem 2018; 26:3967-3974. [DOI: 10.1016/j.bmc.2018.06.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 05/20/2018] [Accepted: 06/14/2018] [Indexed: 11/22/2022]
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15
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Synthesis and 1H, 13C and 15N NMR characterisation of substituted Pyrazolo[4,3-c]quinolines and related compounds. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Knutson DE, Kodali R, Divović B, Treven M, Stephen MR, Zahn NM, Dobričić V, Huber AT, Meirelles MA, Verma RS, Wimmer L, Witzigmann C, Arnold LA, Chiou LC, Ernst M, Mihovilovic MD, Savić MM, Sieghart W, Cook JM. Design and Synthesis of Novel Deuterated Ligands Functionally Selective for the γ-Aminobutyric Acid Type A Receptor (GABA AR) α6 Subtype with Improved Metabolic Stability and Enhanced Bioavailability. J Med Chem 2018; 61:2422-2446. [PMID: 29481759 DOI: 10.1021/acs.jmedchem.7b01664] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Recent reports indicate that α6β2/3γ2 GABAAR selective ligands may be important for the treatment of trigeminal activation-related pain and neuropsychiatric disorders with sensori-motor gating deficits. Based on 3 functionally α6β2/3γ2 GABAAR selective pyrazoloquinolinones, 42 novel analogs were synthesized, and their in vitro metabolic stability and cytotoxicity as well as their in vivo pharmacokinetics, basic behavioral pharmacology, and effects on locomotion were investigated. Incorporation of deuterium into the methoxy substituents of the ligands increased their duration of action via improved metabolic stability and bioavailability, while their selectivity for the GABAAR α6 subtype was retained. 8b was identified as the lead compound with a substantially improved pharmacokinetic profile. The ligands allosterically modulated diazepam insensitive α6β2/3γ2 GABAARs and were functionally silent at diazepam sensitive α1β2/3γ2 GABAARs, thus no sedation was detected. In addition, these analogs were not cytotoxic, which render them interesting candidates for treatment of CNS disorders mediated by GABAAR α6β2/3γ2 subtypes.
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Affiliation(s)
- Daniel E Knutson
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery , University of Wisconsin-Milwaukee , 3210 N. Cramer St. , Milwaukee , Wisconsin 53211 , United States
| | - Revathi Kodali
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery , University of Wisconsin-Milwaukee , 3210 N. Cramer St. , Milwaukee , Wisconsin 53211 , United States
| | - Branka Divović
- Department of Pharmacology, Faculty of Pharmacy , University of Belgrade , Vojvode Stepe 450 , 11221 Belgrade , Serbia
| | - Marco Treven
- Department of Molecular Neurosciences, Center for Brain Research , Medical University of Vienna , Spitalgasse 4 , A-1090 Vienna , Austria
| | - Michael R Stephen
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery , University of Wisconsin-Milwaukee , 3210 N. Cramer St. , Milwaukee , Wisconsin 53211 , United States
| | - Nicolas M Zahn
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery , University of Wisconsin-Milwaukee , 3210 N. Cramer St. , Milwaukee , Wisconsin 53211 , United States
| | - Vladimir Dobričić
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy , University of Belgrade , Vojvode Stepe 450 , 11221 Belgrade , Serbia
| | - Alec T Huber
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery , University of Wisconsin-Milwaukee , 3210 N. Cramer St. , Milwaukee , Wisconsin 53211 , United States
| | - Matheus A Meirelles
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery , University of Wisconsin-Milwaukee , 3210 N. Cramer St. , Milwaukee , Wisconsin 53211 , United States
| | - Ranjit S Verma
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery , University of Wisconsin-Milwaukee , 3210 N. Cramer St. , Milwaukee , Wisconsin 53211 , United States
| | - Laurin Wimmer
- TU Wien-Institute of Applied Synthetic Chemistry , Getreidemarkt 9/163 , A-1060 Vienna , Austria
| | - Christopher Witzigmann
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery , University of Wisconsin-Milwaukee , 3210 N. Cramer St. , Milwaukee , Wisconsin 53211 , United States
| | - Leggy A Arnold
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery , University of Wisconsin-Milwaukee , 3210 N. Cramer St. , Milwaukee , Wisconsin 53211 , United States
| | - Lih-Chu Chiou
- Graduate Institute of Acupuncture Science , China Medical University , Taichung 40402 , Taiwan
| | - Margot Ernst
- Department of Molecular Neurosciences, Center for Brain Research , Medical University of Vienna , Spitalgasse 4 , A-1090 Vienna , Austria
| | - Marko D Mihovilovic
- TU Wien-Institute of Applied Synthetic Chemistry , Getreidemarkt 9/163 , A-1060 Vienna , Austria
| | - Miroslav M Savić
- Department of Pharmacology, Faculty of Pharmacy , University of Belgrade , Vojvode Stepe 450 , 11221 Belgrade , Serbia
| | - Werner Sieghart
- Department of Molecular Neurosciences, Center for Brain Research , Medical University of Vienna , Spitalgasse 4 , A-1090 Vienna , Austria
| | - James M Cook
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery , University of Wisconsin-Milwaukee , 3210 N. Cramer St. , Milwaukee , Wisconsin 53211 , United States
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Treven M, Siebert DCB, Holzinger R, Bampali K, Fabjan J, Varagic Z, Wimmer L, Steudle F, Scholze P, Schnürch M, Mihovilovic MD, Ernst M. Towards functional selectivity for α6β3γ2 GABA A receptors: a series of novel pyrazoloquinolinones. Br J Pharmacol 2018; 175:419-428. [PMID: 29127702 PMCID: PMC5773961 DOI: 10.1111/bph.14087] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 10/27/2017] [Accepted: 10/28/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND AND PURPOSE The GABAA receptors are ligand-gated ion channels, which play an important role in neurotransmission. Their variety of binding sites serves as an appealing target for many clinically relevant drugs. Here, we explored the functional selectivity of modulatory effects at specific extracellular α+/β- interfaces, using a systematically varied series of pyrazoloquinolinones. EXPERIMENTAL APPROACH Recombinant GABAA receptors were expressed in Xenopus laevis oocytes and modulatory effects on GABA-elicited currents by the newly synthesized and reference compounds were investigated by the two-electrode voltage clamp method. KEY RESULTS We identified a new compound which, to the best of our knowledge, shows the highest functional selectivity for positive modulation at α6β3γ2 GABAA receptors with nearly no residual activity at the other αxβ3γ2 (x = 1-5) subtypes. This modulation was independent of affinity for α+/γ- interfaces. Furthermore, we demonstrated for the first time a compound that elicits a negative modulation at specific extracellular α+/β- interfaces. CONCLUSION AND IMPLICATIONS These results constitute a major step towards a potential selective positive modulation of certain α6-containing GABAA receptors, which might be useful to elicit their physiological role. Furthermore, these studies pave the way towards insights into molecular principles that drive positive versus negative allosteric modulation of specific GABAA receptor isoforms.
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Affiliation(s)
- Marco Treven
- Department of Molecular Neurosciences, Center for Brain ResearchMedical University ViennaViennaAustria
| | | | - Raphael Holzinger
- Department of Molecular Neurosciences, Center for Brain ResearchMedical University ViennaViennaAustria
| | - Konstantina Bampali
- Department of Molecular Neurosciences, Center for Brain ResearchMedical University ViennaViennaAustria
| | - Jure Fabjan
- Department of Molecular Neurosciences, Center for Brain ResearchMedical University ViennaViennaAustria
| | - Zdravko Varagic
- Department of Molecular Neurosciences, Center for Brain ResearchMedical University ViennaViennaAustria
| | - Laurin Wimmer
- Institute of Applied Synthetic ChemistryTU WienViennaAustria
| | - Friederike Steudle
- Department of Pathobiology of the Nervous System, Center for Brain ResearchMedical University ViennaViennaAustria
| | - Petra Scholze
- Department of Pathobiology of the Nervous System, Center for Brain ResearchMedical University ViennaViennaAustria
| | | | | | - Margot Ernst
- Department of Molecular Neurosciences, Center for Brain ResearchMedical University ViennaViennaAustria
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Malvacio I, Cuzzolin A, Sturlese M, Vera DMA, Moyano EL, Moro S. Synthesis and preliminary structure-activity relationship study of 2-aryl-2H-pyrazolo[4,3-c]quinolin-3-ones as potential checkpoint kinase 1 (Chk1) inhibitors. J Enzyme Inhib Med Chem 2017; 33:171-183. [PMID: 29210298 PMCID: PMC6010083 DOI: 10.1080/14756366.2017.1404592] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The serine-threonine checkpoint kinase 1 (Chk1) plays a critical role in the cell cycle arrest in response to DNA damage. In the last decade, Chk1 inhibitors have emerged as a novel therapeutic strategy to potentiate the anti-tumour efficacy of cytotoxic chemotherapeutic agents. In the search for new Chk1 inhibitors, a congeneric series of 2-aryl-2 H-pyrazolo[4,3-c]quinolin-3-one (PQ) was evaluated by in-vitro and in-silico approaches for the first time. A total of 30 PQ structures were synthesised in good to excellent yields using conventional or microwave heating, highlighting that 14 of them are new chemical entities. Noteworthy, in this preliminary study two compounds 4e2 and 4h2 have shown a modest but significant reduction in the basal activity of the Chk1 kinase. Starting from these preliminary results, we have designed the second generation of analogous in this class and further studies are in progress in our laboratories.
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Affiliation(s)
- Ivana Malvacio
- a Department of Organic Chemistry, INFIQC, School of Chemical Sciences , National University of Cordoba , Cordoba , Argentina.,b Molecular Modeling Section (MMS), Dipartimento di Scienze Farmaceutiche , Università degli Studi di Padova , via Marzolo, Padova , Italy
| | - Alberto Cuzzolin
- b Molecular Modeling Section (MMS), Dipartimento di Scienze Farmaceutiche , Università degli Studi di Padova , via Marzolo, Padova , Italy
| | - Mattia Sturlese
- b Molecular Modeling Section (MMS), Dipartimento di Scienze Farmaceutiche , Università degli Studi di Padova , via Marzolo, Padova , Italy
| | - D Mariano A Vera
- c Department of Chemistry, QUIAMM-INBIOTEC, School of Exact and Natural Sciences , National University of Mar del Plata , Mar del Plata , Buenos Aires , Argentina
| | - E Laura Moyano
- a Department of Organic Chemistry, INFIQC, School of Chemical Sciences , National University of Cordoba , Cordoba , Argentina
| | - Stefano Moro
- b Molecular Modeling Section (MMS), Dipartimento di Scienze Farmaceutiche , Università degli Studi di Padova , via Marzolo, Padova , Italy
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Weil M, Siebert DCB, Schnürch M. ( Z)-4,6-Dichloro- N-(4-chlorophenyl)quinoline-3-carbimidoyl chloride. IUCRDATA 2017. [DOI: 10.1107/s2414314617002747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The title imidoyl chloride, C16H8Cl4N2, has formed accidentally as a side product during the synthesis of a quinolin-3-one derivative. The molecule is not flat [the dihedral angle between the 4,6-dichloroquinoline and the imidoyl chloride planes is 53.43 (5)°], preventing π-conjugation over the complete entity. In the crystal, C—H...N hydrogen bonding between a chlorophenyl C—H group and the quinoline N atom, as well as π–π stacking between neighbouring quinoline rings, consolidate the packing.
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20
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Amr FI, Vila C, Blay G, Muñoz MC, Pedro JR. Organocatalytic Enantioselective Alkylation of Pyrazol-3-ones with Isatin-Derived Ketimines: Stereocontrolled Construction of Vicinal Tetrasubstituted Stereocenters. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600036] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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21
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Tomassoli I, Herlem G, Picaud F, Benchekroun M, Bautista-Aguilera OM, Luzet V, Jimeno ML, Gharbi T, Refouvelet B, Ismaili L. Synthesis, regioselectivity, and DFT analysis of new antioxidant pyrazolo[4,3-c]quinoline-3,4-diones. MONATSHEFTE FUR CHEMIE 2016. [DOI: 10.1007/s00706-016-1660-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Mao S, Geng X, Yang Y, Qian X, Wu S, Han J, Wang L. Base promoted direct C4-arylation of 4-substituted-pyrazolin-5-ones with diaryliodonium salts. RSC Adv 2015. [DOI: 10.1039/c5ra03819g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A metal-free approach for the C4-arylation of 4-substituted-pyrazolin-5-ones with diaryliodonium salts was developed.
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Affiliation(s)
- Song Mao
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Xu Geng
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Yang Yang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Xiaofei Qian
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Shengying Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Jianwei Han
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis
- Shanghai Institute of Organic Chemistry
- The Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Limin Wang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
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Sieghart W, Ramerstorfer J, Sarto-Jackson I, Varagic Z, Ernst M. A novel GABA(A) receptor pharmacology: drugs interacting with the α(+) β(-) interface. Br J Pharmacol 2012; 166:476-85. [PMID: 22074382 DOI: 10.1111/j.1476-5381.2011.01779.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
GABA(A) receptors are ligand-gated chloride channels composed of five subunits that can belong to different subunit classes. The existence of 19 different subunits gives rise to a multiplicity of GABA(A) receptor subtypes with distinct subunit composition; regional, cellular and subcellular distribution; and pharmacology. Most of these receptors are composed of two α, two β and one γ2 subunits. GABA(A) receptors are the site of action of a variety of pharmacologically and clinically important drugs, such as benzodiazepines, barbiturates, neuroactive steroids, anaesthetics and convulsants. Whereas GABA acts at the two extracellular β(+) α(-) interfaces of GABA(A) receptors, the allosteric modulatory benzodiazepines interact with the extracellular α(+) γ2(-) interface. In contrast, barbiturates, neuroactive steroids and anaesthetics seem to interact with solvent accessible pockets in the transmembrane domain. Several benzodiazepine site ligands have been identified that selectively interact with GABA(A) receptor subtypes containing α2βγ2, α3βγ2 or α5βγ2 subunits. This indicates that the different α subunit types present in these receptors convey sufficient structural differences to the benzodiazepine binding site to allow specific interaction with certain benzodiazepine site ligands. Recently, a novel drug binding site was identified at the α(+) β(-) interface. This binding site is homologous to the benzodiazepine binding site at the α(+) γ2(-) interface and is thus also strongly influenced by the type of α subunit present in the receptor. Drugs interacting with this binding site cannot directly activate but only allosterically modulate GABA(A) receptors. The possible importance of such drugs addressing a spectrum of receptor subtypes completely different from that of benzodiazepines is discussed.
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Affiliation(s)
- Werner Sieghart
- Department of Biochemistry and Molecular Biology, Center for Brain Research, Medical University Vienna, Vienna, Austria
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24
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Zhmurenko LA, Molodavkin GM, Voronina TA, Lezina VP. Synthesis and antidepressant and anxiolytic activity of derivatives of pyrazolo[4,3-c]pyridine and 4-phenylhydrazinonicotinic acids. Pharm Chem J 2012. [DOI: 10.1007/s11094-012-0726-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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25
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Nilsson J, Nielsen EØ, Liljefors T, Nielsen M, Sterner O. 3-Arylisothiazoloquinols As Potent Ligands for the Benzodiazepine Site of GABA<sub>A</sub> Receptors. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/jbise.2012.51001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Lu Z, Xie C, Han J, Pan Y. Tandem 1,5-migration/Michael reactions to prepare adducts of pyrazolone derivatives: protecting group-directed rearrangement. RSC Adv 2012. [DOI: 10.1039/c2ra21549g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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28
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Abstract
GABA(A) receptors mediate the action of many clinically important drugs interacting with different binding sites. For some potential binding sites, no interacting drugs have yet been identified. Here, we established a steric hindrance procedure for the identification of drugs acting at the extracellular α1+β3- interface, which is homologous to the benzodiazepine binding site at the α1+γ2- interface. On screening of >100 benzodiazepine site ligands, the anxiolytic pyrazoloquinoline 2-p-methoxyphenylpyrazolo[4,3-c]quinolin-3(5H)-one (CGS 9895) was able to enhance GABA-induced currents at α1β3 receptors from rat. CGS 9895 acts as an antagonist at the benzodiazepine binding site at nanomolar concentrations, but enhances GABA-induced currents via a different site present at α1β3γ2 and α1β3 receptors. By mutating pocket-forming amino acid residues at the α1+ and the β3- side to cysteines, we demonstrated that covalent labeling of these cysteines by the methanethiosulfonate ethylamine reagent MTSEA-biotin was able to inhibit the effect of CGS 9895. The inhibition was not caused by a general inactivation of GABA(A) receptors, because the GABA-enhancing effect of ROD 188 or the steroid α-tetrahydrodeoxycorticosterone was not influenced by MTSEA-biotin. Other experiments indicated that the CGS 9895 effect was dependent on the α and β subunit types forming the interface. CGS 9895 thus represents the first prototype of drugs mediating benzodiazepine-like modulatory effects via the α+β- interface of GABA(A) receptors. Since such binding sites are present at αβ, αβγ, and αβδ receptors, such drugs will have a much broader action than benzodiazepines and might become clinical important for the treatment of epilepsy.
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29
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Nilsson J, Gidlöf R, Nielsen EØ, Liljefors T, Nielsen M, Sterner O. Triazoloquinazolinediones as novel high affinity ligands for the benzodiazepine site of GABAA receptors. Bioorg Med Chem 2011; 19:111-21. [DOI: 10.1016/j.bmc.2010.11.050] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Accepted: 11/20/2010] [Indexed: 11/29/2022]
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Hekmatshoar R, Kargar M, Mostashari A. Synthesis of Novel Methylene Bridge Functionalized Bis(indolyl)methanes through a Double Michael Addition. HETEROCYCLES 2011. [DOI: 10.3987/com-11-12331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Liao YH, Chen WB, Wu ZJ, Du XL, Cun LF, Zhang XM, Yuan WC. Organocatalytic Asymmetric Michael Addition of Pyrazolin-5-ones to Nitroolefins with Bifunctional Thiourea: Stereocontrolled Construction of Contiguous Quaternary and Tertiary Stereocenters. Adv Synth Catal 2010. [DOI: 10.1002/adsc.200900764] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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33
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López Rivilli MJ, Moyano EL, Yranzo GI. An alternative approach toward 2-aryl-2H-pyrazolo[4,3-c]-quinolin-3-ones by a multistep synthesis. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2009.10.123] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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34
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El-Essawy FA. Synthesis of tetrahetrocyclic systems including pyrido[2′,3′:3,4]pyrazolo[1,5- a]pyrimidine fused with pyrazole derivatives and isolated with 1,3,4-oxa-, thiadiazole, and 1,2,4-tetrazole derivatives. J Heterocycl Chem 2010. [DOI: 10.1002/jhet.339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Burden F, Winkler D. An Optimal Self-Pruning Neural Network and Nonlinear Descriptor Selection in QSAR. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/qsar.200810202] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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36
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Wang K, Fu X, Liu J, Liang Y, Dong D. PIFA-Mediated Oxidative Cyclization of 1-Carbamoyl-1-oximylcycloalkanes: Synthesis of Spiro-Fused Pyrazolin-5-one N-Oxides. Org Lett 2009; 11:1015-8. [DOI: 10.1021/ol802952e] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kewei Wang
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China, and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Xiaolan Fu
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China, and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Jinying Liu
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China, and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Yongjiu Liang
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China, and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Dewen Dong
- Department of Chemistry, Northeast Normal University, Changchun, 130024, China, and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
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37
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Zarghi A, Hajimahdi Z, Mohebbi S, Rashidi H, Mozaffari S, Sarraf S, Faizi M, Tabatabaee SA, Shafiee A. Design and Synthesis of New 2-Substituted-5-[2-(2-halobenzyloxy)phenyl]-1,3,4-oxadiazoles as Anticonvulsant Agents. Chem Pharm Bull (Tokyo) 2008; 56:509-12. [DOI: 10.1248/cpb.56.509] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Afshin Zarghi
- Department of Medicinal Chemistry, Shaheed Beheshti University of Medical Sciences
| | - Zahra Hajimahdi
- Department of Medicinal Chemistry, Shaheed Beheshti University of Medical Sciences
| | - Shohreh Mohebbi
- Department of Medicinal Chemistry, Shaheed Beheshti University of Medical Sciences
| | - Hootesa Rashidi
- Department of Medicinal Chemistry, Shaheed Beheshti University of Medical Sciences
| | - Sasan Mozaffari
- Department of Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Shaheed Beheshti University of Medical Sciences
| | - Sahar Sarraf
- Department of Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Shaheed Beheshti University of Medical Sciences
| | - Mehrdad Faizi
- Department of Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Shaheed Beheshti University of Medical Sciences
| | | | - Abbas Shafiee
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences
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Winkler DA, Burden FR. Robust QSAR Models from Novel Descriptors and Bayesian Regularised Neural Networks. MOLECULAR SIMULATION 2006. [DOI: 10.1080/08927020008022374] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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39
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Maeda M, Komori H, Dohmoto H, Kojima M. Synthesis of radioiodinated analogs of 2-phenylpyrazolo[4,3-c]-quinolin-3 (5H)-one by a modified triazene method. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580220510] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Grunwald C, Rundfeldt C, Lankau HJ, Arnold T, Höfgen N, Dost R, Egerland U, Hofmann HJ, Unverferth K. Synthesis, Pharmacology, and Structure−Activity Relationships of Novel Imidazolones and Pyrrolones as Modulators of GABAA Receptors. J Med Chem 2006; 49:1855-66. [PMID: 16539371 DOI: 10.1021/jm0509400] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
New series of imidazolones and pyrrolones were synthesized. The compounds were tested regarding their anxiolytic properties due to modulation of the GABAA receptor response. Several derivatives exhibit considerable pharmacological activity while lacking the typical side effects of benzodiazepine receptor agonists. 1-(4-chlorophenyl)-4-morpholin-1-yl-1,5-dihydro-imidazol-2-one (2) and 1-(4-chlorophenyl)-4-piperidin-1-yl-1,5-dihydro-imidazol-2-one (3) were protective in the pentylenetetrazole test in rats with oral ED50 of 27.4 and 12.8 mg/kg and TD50 (rotarod) of >500 and 265 mg/kg, respectively. The minimum effective dose in the Vogel conflict test was 3 mg/kg for both compounds. Common structure-activity relationship and comparative molecular field analysis models of the various series of derivatives could be established which are in accordance with a GABAA mediated pharmacological action. The findings fit well into an established pharmacophore model. This model is refined by an additional steric restriction feature.
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Affiliation(s)
- Christian Grunwald
- elbion AG, Meissner Strasse 191, D-01445 Radebeul, Germany, and Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Brüderstrasse 34, D-04103 Leipzig, Germany.
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Lin L, Lin WQ, Jiang JH, Zhou YP, Shen GL, Yu RQ. QSAR analysis of a series of 2-aryl(heteroaryl)-2,5-dihydropyrazolo[4,3-c]quinolin-3-(3H)-ones using piecewise hyper-sphere modeling by particle swarm optimization. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.07.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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43
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Ferlin MG, Chiarelotto G, Dall'Acqua S, Maciocco E, Mascia MP, Pisu MG, Biggio G. Novel anellated pyrazoloquinolin-3-ones: synthesis and in vitro BZR activity. Bioorg Med Chem 2005; 13:3531-41. [PMID: 15848766 DOI: 10.1016/j.bmc.2005.02.042] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2004] [Revised: 02/10/2005] [Accepted: 02/18/2005] [Indexed: 10/25/2022]
Abstract
A series of pyrazolo[4,3-c]pyrrolo[3,2-f]quinolin-3-one derivatives 6, 7a-c, 8a,b, 9a,b and 10-12 were synthesized as modified pyrazoloquinolinone analogs (PQs) and evaluated for their ability to inhibit radioligand to central and peripheral benzodiazepine receptors (BZRs) and their effect on GABA(A) alpha1beta2gamma2L receptors expressed in Xenopus laevis oocytes. Multistep synthesis starting from 5-nitroindole, via the Gould-Jacobs reaction to the quinoline nucleus, yielded key intermediates 9-chloro-3H-pyrrolo[3,2-f]quinoline-8-carboxylates. The reaction of the latter with methyl-hydrazine and various phenyl-hydrazines furnished the final compounds. In order to confirm the expected tetracyclic 2-substituted-2H-pyrazolopyrroloquinolin-3-one structure, IR spectrophotometric, mono-1H and 13C and bi-dimensional spectrometric and HRMS analyses were carried out: all compounds were found to be 2-substituted 3-keto tautomers; compound 6 only differed because it turned out to be 1-methyl-2H-pyrazolo[4,3-c]pyrrolo[3,2-f]quinolin-3-olo. The results of this work are consistent with those previously reported for PQs: 7-9 show high potency in displacing specific [3H]flunitrazepam from its receptor site; no compound was active in inhibiting the binding of [3H]PK 11195. They all act as antagonists at central BZR.
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Affiliation(s)
- Maria Grazia Ferlin
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Padova, Via Marzolo 5, 35131 Padova, Italy.
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Primofiore G, Da Settimo F, Marini AM, Simorini F, La Motta C, Taliani S, Laneri S, Trincavelli L, Martini C. Synthesis and benzodiazepine receptor affinity of derivatives of the new tricyclic heteroaromatic system pyrido[3',2':5,6]thiopyrano[4,3-c]pyridazin-3(2H,5H)-one. Arch Pharm (Weinheim) 2005; 338:126-32. [PMID: 15799013 DOI: 10.1002/ardp.200400948] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Derivatives 7-13 of a new tricyclic heteroaromatic system, pyrido[3',2':5,6]thiopyrano[4,3-c]pyridazin-3(2H,5H)-one, were prepared as potential ligands at the benzodiazepine receptor, in view of their structural analogy with potent ligands such as the pyrazoloquinolines of the CGS series II, and especially with the benzothiopyrano[4,3-c]pyridazinones VI. They were obtained starting from the versatile ketones 2,3-dihydrothiopyrano[2,3-b]pyridin-4(4H)-one 1 and the corresponding 7-methyl derivative 2, via condensation with glyoxylic acid, and reaction of the intermediate acid mixtures with hydrazine or substituted phenylhydrazines. When evaluated for their binding affinity at the benzo diazepine receptor in bovine cortical membranes, the target compounds 8-13 displayed an affinity in the micromolar/submicromolar order. A hypothesis is presented to rationalize these results.
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45
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Primofiore G, Da Settimo F, Taliani S, Salerno S, Novellino E, Greco G, Cosimelli B, Besnard F, Costa B, Montali M, Martini C. High Affinity Central Benzodiazepine Receptor Ligands: Synthesis and Biological Evaluation of a Series of Phenyltriazolobenzotriazindione Derivatives. J Med Chem 2005; 48:2936-43. [PMID: 15828832 DOI: 10.1021/jm0408722] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of 2-phenyl[1,2,3]triazolo[1,2-a][1,2,4]benzotriazin-1,5(6H)-diones (PTBTs), VII, were prepared and tested at the central benzodiazepine receptor (BzR). The skeleton of these compounds was designed by formally combining the N-C=O moieties of the known BzR ligands, triazoloquinoxalines (IV) and triazinobenzimidazoles (ATBIs) (VI). Most of the PTBTs displayed submicromolar/nanomolar potency at the BzR. The 9-chloro derivatives (45-49) were generally found to be more potent than their 9-unsubstituted counterparts (37-44). Compound 45 turned out to be the most potent of the PTBTs (K(i) 2.8 nM). A subset of compounds (37, 42, 45, 49), when tested for their affinity on recombinant rat alpha1beta2gamma2, alpha2beta2gamma2, and alpha5beta3gamma2 GABA(A)/Bz receptor subtypes, showed enhanced affinities for the alpha1beta2gamma2 isoform, with compounds 45 and 49 exhibiting the highest selectivity. Moreover, compounds 45 and 49 were found to display a full agonist efficacy profile at alpha1 and alpha2 receptor subtypes, and an antagonist efficacy at alpha5-containing receptors.
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Affiliation(s)
- Giampaolo Primofiore
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy.
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46
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Wagner E, Becan L, Nowakowska E. Synthesis and pharmacological assessment of derivatives of isoxazolo[4,5-d]pyrimidine. Bioorg Med Chem 2004; 12:265-72. [PMID: 14697792 DOI: 10.1016/j.bmc.2003.10.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A series of new 5-alkyl and 5-arylisoxazolo[4,5-d]pyrimidinones (5a-g, 6-8) were prepared from 4-amino-3-oxo-isoxazolidine-5-carboxylic acid amide. Some of the aryl derivatives of isoxazolo[4,5-d]pyrimidine were tested pharmacologically in comparison with Diazepam. Compounds 5b-d and 7 demonstrated interesting anxiolytic activity.
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Affiliation(s)
- Edwin Wagner
- Department of Drugs Technology, Wroclaw Medical University, Nankier Sq. 1,50-140, Wroclaw, Poland.
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47
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Carotti A, Altomare C, Savini L, Chiasserini L, Pellerano C, Mascia MP, Maciocco E, Busonero F, Mameli M, Biggio G, Sanna E. High affinity central benzodiazepine receptor ligands. Part 3: insights into the pharmacophore and pattern recognition study of intrinsic activities of pyrazolo[4,3-c]quinolin-3-ones. Bioorg Med Chem 2004; 11:5259-72. [PMID: 14604690 DOI: 10.1016/s0968-0896(03)00527-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Novel 2-phenyl-2,5-dihydropyrazolo[4,3-c]quinolin-3-(3H)-ones (PQs) endowed with high affinity for central benzodiazepine receptor (BzR) were synthesized. In particular, 9-fluoro-2-(2-fluorophenyl)-2,5-dihydro-3H-pyrazolo[4,3-c]quinolin-3-one (2(2)) showed binding affinity in the subnanomolar concentration range and proved to be in vitro a potent antagonist. This finding allowed the nature of the hydrogen bonding receptor site H(2) to be established, as located between the N-1 nitrogen of the PQ nucleus and the ortho position of the N-2-aryl group. [35S]tert-Butylbicyclophosphorothionate ([35S]TBPS) binding assays and electrophysiological measurements of the effects on GABA-evoked Cl(-) currents at recombinant human alpha(1)beta(2)gamma(2)(L) GABA(A) receptors, expressed in Xenopus laevis oocytes, were used to assess the intrinsic activities of a large series of PQs. With the aim of extracting discriminant information and distinguishing BzR ligands with different profiles of efficacy, 51 PQ derivatives, including full and partial agonists, antagonists, and inverse agonists, were analyzed in a multidimensional chemical descriptor space, defined by the lipophilicity parameter CLOG P and 3-D molecular WHIM descriptors, by means of principal component analysis, k-nearest neighbors (k-NN) method, and linear discriminant analysis (LDA). The classification methods were applied to subsets of pairs of efficacy classes, and lipophilicity and 3-D size descriptors were detected as the discriminant variables by a stepwise linear discriminant analysis. LDA proved to be superior to k-NN, especially in classifying PQ ligands (60-84% of success in prediction ability) into categories of efficacies which were contiguous and quite overlapped in the hyperspace of variables.
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Affiliation(s)
- Andrea Carotti
- Dipartimento Farmaco Chimico, Università degli Studi, Via E. Orabona 4, I-70125, Bari, Italy
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48
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Phillips ED, Hirst SC, Perry MWD, Withnall J. [3 + 2] Cycloaddition Reactions of 4-Alkyl-3-hydroxy-2H-pyrazolo[4,3-c]iso- quinolinium Inner Salts. J Org Chem 2003; 68:8700-3. [PMID: 14575505 DOI: 10.1021/jo034160f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Heating dipolarophiles with 4-alkyl-3-hydroxy-2H-pyrazolo[4,3-c]isoquinolinium hydroxide inner salts results in [3 + 2] cycloaddition across positions 3a and 5 of the aromatic system to give the [3 + 2] cycloadducts in good yield. When the 4-alkyl substituent is a 2-acetate ester and the methylene group can be deprotonated, a second mode of [3 + 2] cycloaddition becomes available for the resulting anion (across the side chain methine group and position 5 of the aromatic system) and occurs under basic conditions, allowing either of two modes of [3 + 2] cycloaddition to be selected by appropriate choice of reaction conditions.
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Affiliation(s)
- Eifion D Phillips
- Department of Medicinal Chemistry, AstraZeneca R&D Charnwood, Bakewell Road, Loughborough, Leicestershire LE11 5RH, United Kingdom.
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49
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Chambers MS, Atack JR, Bromidge FA, Broughton HB, Cook S, Dawson GR, Hobbs SC, Maubach KA, Reeve AJ, Seabrook GR, Wafford K, MacLeod AM. 6,7-Dihydro-2-benzothiophen-4(5H)-ones: a novel class of GABA-A alpha5 receptor inverse agonists. J Med Chem 2002; 45:1176-9. [PMID: 11881985 DOI: 10.1021/jm010471b] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nonselective inverse agonists at the benzodiazepine binding site on the GABA-A chloride ion channel enhance cognitive performance in animals but cannot be used in the treatment of cognitive disorders because of anxiogenic and convulsant side effects. We have identified a novel series of GABA-A alpha5 receptor ligands during our search for alpha5 receptor inverse agonists as potential cognition enhancers. In particular, 6,6-dimethyl-3-(2-hydroxyethyl)thio-1-(thiazol-2-yl)-6,7-dihydro-2-benzothiophen-4(5H)-one (26) has been identified as a functionally selective GABA-A alpha5 inverse agonist.
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Affiliation(s)
- Mark S Chambers
- Merck Sharp & Dohme Research Laboratories, The Neuroscience Research Centre, Terlings Park, Eastwick Road, Harlow, Essex CM20 2QR, UK.
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50
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Primofiore G, Settimo FD, Taliani S, Marini AM, Novellino E, Greco G, Lavecchia A, Besnard F, Trincavelli L, Costa B, Martini C. Novel N-(arylalkyl)indol-3-ylglyoxylylamides targeted as ligands of the benzodiazepine receptor: synthesis, biological evaluation, and molecular modeling analysis of the structure-activity relationships. J Med Chem 2001; 44:2286-97. [PMID: 11428922 DOI: 10.1021/jm010827j] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of N-(arylalkyl)indol-3-ylglyoxylylamides (4-8) was synthesized as ligands of the benzodiazepine receptor (BzR) and tested for their ability to displace [(3)H]flumazenil from bovine brain membranes. The new compounds, bearing a branched (4) or a geometrically constrained benzyl/phenylethyl amide side chain (5-8), represent the continuation of our research on N-benzylindol-3-ylglyoxylylamides 1 (Da Settimo et al., 1996), N'-phenylindol-3-ylglyoxylohydrazides 2 (Da Settimo et al., 1998), and N-(indol-3-ylglyoxylyl)alanine derivatives 3 (Primofiore et al., 1989). A few indoles belonging to the previously investigated benzylamides 1 and phenylhydrazides 2 were synthesized and tested to enrich the SARs in these two series. The affinities and the GABA ratios of selected compounds for clonal mammalian alpha(1)beta(2)gamma(2), alpha(3)beta(2)gamma(2), and alpha(5)beta(3)gamma(2) BzR subtypes were also determined. It was hypothesized that the reduced flexibility of indoles 4-8 would both facilitate the mapping of the BzR binding cleft and increase the chances of conferring selectivity for the considered receptor subtypes. In the series of indoles 4, the introduction of a methyl group on the benzylic carbon with the R configuration improved affinity of the 5-substituted (5-Cl and 5-NO(2)) derivatives, whereas it was detrimental for their 5-unsubtituted (5-H) counterparts. All S enantiomers were less potent than the R ones. Replacement of the methyl with hydrophilic substituents on the benzylic carbon lowered affinity. The isoindolinylamide side chain was tolerated if the 5-position was unsubstituted (K(i) of 5a = 123 nM), otherwise affinity was abolished (5b, c). All the 2-indanylamides 6 and (S)-1-indanylamides 8 were devoid of any appreciable affinity. The 5-Cl and 5-NO(2) (R)-1-indanylamides 7b (K(i) 80 nM) and 7c (K(i) 28 nM) were the most potent among the indoles 5-8 geometrically constrained about the side chain. The 5-H (R)-1-indanylamide 7a displayed a lower affinity (K(i) 675 nM). The SARs developed from the new compounds, together with those collected from our previous studies, confirmed the hypothesis of different binding modes for 5-substituted and 5-unsubstituted indoles, suggesting that the shape of the lipophilic pocket L(1) (notation in accordance with Cook's BzR topological model) is asymmetric and highlighted the stereoelectronic and conformational properties of the amide side chain required for high potency. Several of the new indoles showed selectivity for the alpha(1)beta(2)gamma(2) subtype compared with the alpha(3)beta(2)gamma(2) and alpha(5)beta(3)gamma(2) subtypes (e.g.: 4t and 7c bind to these three BzR isoforms with K(i) values of 14 nM, 283 nM, 239 nM, and 9 nM, 1960 nM, 95 nM, respectively). The GABA ratios close to unity exhibited by all the tested compounds on each BzR subtype were predictive of an efficacy profile typical of antagonists.
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Affiliation(s)
- G Primofiore
- Dipartimento di Scienze Farmaceutiche and Dipartimento di Psichiatria, Neurobiologia, Farmacologia e Biotecnologie, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy.
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