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Zheng Y, Zhang TT, Shen WB. Gold-catalyzed oxidative cyclization of amide-alkynes: access to functionalized γ-lactams. Org Biomol Chem 2021; 19:9688-9691. [PMID: 34718364 DOI: 10.1039/d1ob01846a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient gold-catalyzed oxidative cyclization of amide-alkynes is developed. A series of functionalized γ-lactams are easily accessed by employing this strategy. The tandem reaction proceeds through alkyne oxidation, carbene/alkyne metathesis, and donor/donor carbene oxidation.
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Affiliation(s)
- Yi Zheng
- College of Sciences, Henan Agricultural University, Zhengzhou 450002, China.
| | - Ting-Ting Zhang
- College of Sciences, Henan Agricultural University, Zhengzhou 450002, China.
| | - Wen-Bo Shen
- College of Sciences, Henan Agricultural University, Zhengzhou 450002, China.
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2
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Shen WB, Zhang TT, Zhang M, Wu JJ, Jiang XL, Ru GX, Gao GQ, Zhu XH. Cu( i)- and Au( i)-catalyzed regioselective oxidation of diynes: divergent synthesis of N-heterocycles. Org Chem Front 2021. [DOI: 10.1039/d1qo00912e] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The efficient and divergent construction of two types of valuable N-heterocycle is achieved easily, with the first example of the generation of α-oxo copper carbenes via copper-catalyzed oxidation of non-polarized alkynes.
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Affiliation(s)
- Wen-Bo Shen
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Ting-Ting Zhang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Meng Zhang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Jing-Jing Wu
- Qingdao Agricultural University Library, Qingdao 266109, China
| | - Xiao-Lei Jiang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Guang-Xin Ru
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Guang-Qin Gao
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Xiu-Hong Zhu
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
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Mohamadpour F. Al2(SO4)3·18H2O as an Eco-Safe Catalyst Promoting Synthesis of Polysubstituted Dihydropyrrol-2-ones. CHEMISTRY & CHEMICAL TECHNOLOGY 2020. [DOI: 10.23939/chcht14.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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4
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Vyasamudri S, Yang DY. Base-Dependent Divergent Annulation of 4-Chloro-3-formylcoumarin and Tetrahydroisoquinoline: Application to the Synthesis of Isolamellarins and Hydroxypyrrolones. J Org Chem 2019; 84:3662-3670. [DOI: 10.1021/acs.joc.8b03259] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sameer Vyasamudri
- Department of Chemistry, Tunghai University, No. 1727, Sec. 4, Taiwan Boulevard, Xitun District, Taichung 40704, Taiwan
| | - Ding-Yah Yang
- Department of Chemistry, Tunghai University, No. 1727, Sec. 4, Taiwan Boulevard, Xitun District, Taichung 40704, Taiwan
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Aroyl and acyl cyanides as orthogonal protecting groups or as building blocks for the synthesis of heterocycles. Mol Divers 2019; 23:1065-1084. [PMID: 30666490 DOI: 10.1007/s11030-019-09915-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 01/04/2019] [Indexed: 10/27/2022]
Abstract
α-Cyanoketones represent a synthetically attractive scaffold possessing bifunctional reactivity which enabled synthesis of a diversity of products. This involves reaction of nucleophiles with electrophilic carbonyl carbon performing an efficient and regioselective way to acylation reaction, cycloaddition of activated cyano function with dipolarophiles, metal-catalyzed cross-dehydrogenative coupling carbocyanation across C-C multiple bonds as well as hydrocyanation. This review provides the recent developments in the chemistry of α-cyanoketones which will be beneficial for researchers and scientists in such field.
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Zhu B, Wang C, Su H, Ye L. NaBAr
F
4
‐Catalyzed Oxidative Cyclization of 1,5‐ and 1,6‐Diynes: Efficient and Divergent Synthesis of Functionalized γ‐ and δ‐Lactams. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201800437] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bo‐Han Zhu
- iChEM, State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University Xiamen Fujian 361005 China
| | - Cai‐Ming Wang
- iChEM, State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University Xiamen Fujian 361005 China
| | - Hong‐Yu Su
- iChEM, State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University Xiamen Fujian 361005 China
| | - Long‐Wu Ye
- iChEM, State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University Xiamen Fujian 361005 China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences Shanghai 200032 China
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Packer RMA, De Risio L, Volk HA. Investigating the potential of the anti-epileptic drug imepitoin as a treatment for co-morbid anxiety in dogs with idiopathic epilepsy. BMC Vet Res 2017; 13:90. [PMID: 28388948 PMCID: PMC5383962 DOI: 10.1186/s12917-017-1000-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 03/24/2017] [Indexed: 01/20/2023] Open
Abstract
Background Behavioural changes associated with idiopathic epilepsy (IE) have been identified in dogs, with fear and anxiety-related problems seen in both drug-naïve dogs and dogs treated with anti-epileptic drugs (AEDs). Treating anxiety-related behaviour in dogs with IE may be challenging, as seizures are a contraindication for many conventional anxiolytic drugs. In addition, many dogs with IE are already treated with AEDs to reduce their seizure frequency, which may have negative effects if used in polytherapy. Imepitoin is low-affinity partial agonist at the benzodiazepine (BDZ) site of the GABAA receptor, and has been demonstrated to have both anticonvulsant and anxiolytic effects in laboratory rodents. Imepitoin has been developed for the treatment of IE in dogs, with demonstrated anticonvulsant effects and high tolerability and safety. To date, imepitoin’s potential to reduce anxiety in dogs with IE has not been investigated. An online survey was conducted to investigate the effect of imepitoin on fear and anxiety-related behaviours in dogs with IE. Eighty-five valid responses were received from owners of dogs with IE currently treated with imepitoin. Anxiety-related behaviour was quantified before and during imepitoin treatment using a validated questionnaire tool (C-BARQ). Results No differences were observed in the five fear/anxiety-related measures between the two time periods (before vs. during treatment) for dog directed fear, stranger directed fear, non-social fear, pain sensitivity and separation related behaviour. A median 45% reduction in seizure frequency/month was observed following imepitoin treatment; however, imepitoin did not appear effective in reducing seizure frequency in a minority of cases. Polyphagia was the most common chronic side effect, and more side effects were reported in polytherapy cases. Conclusions Imepitoin does not appear to improve anxiety-related behaviour in dogs with IE treated with this medication for its anti-epileptic effects. Investigating the effects of imepitoin upon the behaviour of dogs with recognised behavioural anxiety-related problems (e.g. specific fears and phobias, separation related behaviours), in both healthy dogs and dogs with epilepsy is required to further explore any potential anxiolytic effects of this medication.
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Affiliation(s)
- Rowena M A Packer
- Department of Clinical Science and Services, Royal Veterinary College, Hatfield, Hertfordshire, AL9 7TA, UK.
| | | | - Holger A Volk
- Department of Clinical Science and Services, Royal Veterinary College, Hatfield, Hertfordshire, AL9 7TA, UK
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Faizi M, Jahani R, Ebadi SA, Tabatabai SA, Rezaee E, Lotfaliei M, Amini M, Almasirad A. Novel 4-thiazolidinone derivatives as agonists of benzodiazepine receptors: Design, synthesis and pharmacological evaluation. EXCLI JOURNAL 2017; 16:52-62. [PMID: 28435427 PMCID: PMC5379113 DOI: 10.17179/excli2016-692] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Accepted: 11/28/2016] [Indexed: 12/23/2022]
Abstract
A new series of 4-chloro-N-(2-(substitutedphenyl)-4-oxothiazolidin-3-yl)-2-phenoxybenzamide derivatives were designed, synthesized and biologically evaluated as anticonvulsant agents. The designed compounds have the main essential functional groups for binding to the benzodiazepine receptors and 4-thiazolidinone ring as an anticonvulsant pharmacophore. Some of the new synthesized compounds showed considerable anticonvulsant activity in electroshock and pentylenetetrazole-induced lethal convulsion tests. Compound 5i, 4-chloro-N-(2-(4-methoxyphenyl)-4-oxothiazolidin-3-yl)-2-phenoxybenzamide, with the best activity was selected for evaluation of other benzodiazepine pharmacological effects. This compound induced significant sedative-hypnotic activity. However, it does not impair the learning and memory in the experimental condition. Flumazenil was able to antagonize the sedative-hypnotic and anticonvulsant effects of compound 5i indicating that benzodiazepine receptors are highly involved in the pharmacological properties of the novel compounds.
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Affiliation(s)
- Mehrdad Faizi
- Department of Pharmacology and Toxicology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Jahani
- Department of Pharmacology and Toxicology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Abbas Ebadi
- Department of Medicinal Chemistry, Faculty of Pharmacy, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Sayyed Abbas Tabatabai
- Department of Pharmaceutical Chemistry, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Elham Rezaee
- Department of Pharmaceutical Chemistry, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehrnaz Lotfaliei
- Department of Pharmaceutical Chemistry, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohsen Amini
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Almasirad
- Department of Medicinal Chemistry, Faculty of Pharmacy, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
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9
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Du X, Yin D, Ge Z, Wang X, Li R. Asymmetric Michael addition reactions of pyrrolones with chalcones catalyzed by vicinal primary-diamine salts. RSC Adv 2017. [DOI: 10.1039/c7ra03069j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The asymmetric Michael addition reaction of pyrrolones with chalcones catalyzed by vicinal primary-diamine salts has been developed in good yields and high enantioselectivities.
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Affiliation(s)
- Xiaolei Du
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Science
- Peking University
- Beijing 100191
- China
| | - Dawei Yin
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Science
- Peking University
- Beijing 100191
- China
| | - Zemei Ge
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Science
- Peking University
- Beijing 100191
- China
| | - Xin Wang
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Science
- Peking University
- Beijing 100191
- China
| | - Runtao Li
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Science
- Peking University
- Beijing 100191
- China
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Obniska J, Rapacz A, Rybka S, Góra M, Kamiński K, Sałat K, Żmudzki P. Synthesis, and anticonvulsant activity of new amides derived from 3-methyl- or 3-ethyl-3-methyl-2,5-dioxo-pyrrolidin-1-yl-acetic acids. Bioorg Med Chem 2016; 24:1598-607. [DOI: 10.1016/j.bmc.2016.02.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 02/16/2016] [Accepted: 02/20/2016] [Indexed: 12/22/2022]
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11
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Ahmad A, Husain A, Khan SA, Mujeeb M, Bhandari A. Design, synthesis, molecular properties and antimicrobial activities of some novel 2(3H) pyrrolone derivatives. JOURNAL OF SAUDI CHEMICAL SOCIETY 2015. [DOI: 10.1016/j.jscs.2014.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Soleimani E, Yazdani H, Saei P. Synthesis of spiro 3-bromo-4,5-dihydroisoxazoles via [1,3]dipolar cycloaddition reactions. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.02.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Rundfeldt C, Löscher W. The pharmacology of imepitoin: the first partial benzodiazepine receptor agonist developed for the treatment of epilepsy. CNS Drugs 2014; 28:29-43. [PMID: 24357084 DOI: 10.1007/s40263-013-0129-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Although benzodiazepines (BZDs) offer a wide spectrum of antiepileptic activity against diverse types of epileptic seizures, their use in the treatment of epilepsy is limited because of adverse effects, loss of efficacy (tolerance), and development of physical and psychological dependence. BZDs act as positive allosteric modulators of the inhibitory neurotransmitter GABA by binding to the BZD recognition site ("BZD receptor") of the GABAA receptor. Traditional BZDs such as diazepam or clonazepam act as full agonists at this site, so that one strategy to resolve the disadvantages of these compounds would be the development of partial agonists with lower intrinsic efficacy at the BZD site of the GABAA receptor. Several BZD site partial or subtype selective compounds, including bretazenil, abecarnil, or alpidem, have been developed as anxioselective anxiolytic drugs, but epilepsy was not a target indication for such compounds. More recently, the imidazolone derivatives imepitoin (ELB138) and ELB139 were shown to act as low-affinity partial agonists at the BZD site of the GABAA receptor, and imepitoin was developed for the treatment of epilepsy. Imepitoin displayed a broad spectrum of anticonvulsant activity in diverse seizure and epilepsy models at tolerable doses, and, as expected from its mechanism of action, lacked tolerance and abuse liability in rodent and primate models. The more favorable pharmacokinetic profile of imepitoin in dogs versus humans led to the decision to develop imepitoin for the treatment of canine epilepsy. Based on randomized controlled trials that demonstrated antiepileptic efficacy and high tolerability and safety in epileptic dogs, the drug was recently approved for this indication in Europe. Hopefully, the favorable profile of imepitoin for the treatment of epilepsy in dogs will reactivate the interest in partial BZD site agonists as new treatments for human epilepsy.
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Su D, Duan H, Wei Z, Cao J, Liang D, Lin Y. Condensation of Vilsmeier salts, derived from tetraalkylureas, with amidoximes: a novel approach to access N,N-dialkyl-1,2,4-oxadiazol-5-amines. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.10.061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chen HY, Chang SS, Chan YC, Chen CYC. Discovery of novel insomnia leads from screening traditional Chinese medicine database. J Biomol Struct Dyn 2013; 32:776-91. [DOI: 10.1080/07391102.2013.790849] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Sajadikhah SS, Hazeri N. Coupling of amines, dialkyl acetylenedicarboxylates and formaldehyde promoted by [n-Bu4N][HSO4]: an efficient synthesis of highly functionalized dihydro-2-oxopyrroles and bis-dihydro-2-oxopyrroles. RESEARCH ON CHEMICAL INTERMEDIATES 2013. [DOI: 10.1007/s11164-012-0998-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sajadikhah SS, Hazeri N, Maghsoodlou MT, Habibi-Khorassani MS, Khandan-Barani K. A One-pot Multi-component Synthesis of N-aryl-3-aminodihydropyrrol-2-one-4-carboxylates Catalysed by Oxalic Acid Dihydrate. JOURNAL OF CHEMICAL RESEARCH 2013. [DOI: 10.3184/174751912x13547952669204] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A simple synthesis of N-aryl-3-aminodihydropyrrol-2-one-4-carboxylates via one-pot multi-component reaction of amines, dialkyl acetylenedicarboxylates and formaldehyde in the presence of oxalic acid dihydrate (20 mol%) as catalyst in methanol is described. This homogeneous catalytic procedure offers advantages including mild reaction conditions, good to high yields, short reaction time, simple and readily available starting materials, easy work-up and there is no need for column chromatography.
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Affiliation(s)
- Seyed Sajad Sajadikhah
- Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Nourallah Hazeri
- Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | - Malek Taher Maghsoodlou
- Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
| | | | - Khatereh Khandan-Barani
- Department of Chemistry, Zahedan Branch, Islamic Azad University, PO Box 98135-978, Zahedan, Iran
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Zali-Boeini H, Mobin M, Hajibabaei K, Ghani M. Approaches to the construction of substituted 4-amino-1H-pyrrol-2(5H)-ones. J Org Chem 2012; 77:5808-12. [PMID: 22663152 DOI: 10.1021/jo3004309] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fully substituted 4-aminopyrrolones are easily accessed via simple routes starting from imines, ketones, or α-bromophenyl acetonitriles. Imines were reacted with KCN/NH(4)Cl in aqueous ethanol to produce α-arylamino benzyl cyanides. On the other hand, ketones were transformed to the desired α-amino nitriles using a modified Strecker reaction. Then, α-amino nitrile precursors were allowed to react with a suitable acyl halide to produce the corresponding amides. Further treatment of these amides with ethanolic KOH converted them to highly substituted 4-amino-1H-pyrrol-2(5H)-one derivatives in moderate to excellent yields.
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Affiliation(s)
- Hassan Zali-Boeini
- Department of Chemistry, University of Isfahan, 81746-73441, Isfahan, Iran.
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Höfgen N, Stange H, Schindler R, Lankau HJ, Grunwald C, Langen B, Egerland U, Tremmel P, Pangalos MN, Marquis KL, Hage T, Harrison BL, Malamas MS, Brandon NJ, Kronbach T. Discovery of Imidazo[1,5-a]pyrido[3,2-e]pyrazines as a New Class of Phosphodiesterase 10A Inhibitiors. J Med Chem 2010; 53:4399-411. [DOI: 10.1021/jm1002793] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Norbert Höfgen
- Biotie Therapies GmbH, Meissner Strasse 191, 01445 Radebeul, Germany
| | - Hans Stange
- Biotie Therapies GmbH, Meissner Strasse 191, 01445 Radebeul, Germany
| | - Rudolf Schindler
- Biotie Therapies GmbH, Meissner Strasse 191, 01445 Radebeul, Germany
| | | | | | - Barbara Langen
- Biotie Therapies GmbH, Meissner Strasse 191, 01445 Radebeul, Germany
| | - Ute Egerland
- Biotie Therapies GmbH, Meissner Strasse 191, 01445 Radebeul, Germany
| | - Peter Tremmel
- Biotie Therapies GmbH, Meissner Strasse 191, 01445 Radebeul, Germany
| | - Menelas N. Pangalos
- Pfizer Neuroscience Princeton, 865 Ridge Road, Monmouth Junction, New Jersey 08852
| | - Karen L. Marquis
- Pfizer Neuroscience Princeton, 865 Ridge Road, Monmouth Junction, New Jersey 08852
| | - Thorsten Hage
- Biotie Therapies GmbH, Meissner Strasse 191, 01445 Radebeul, Germany
| | - Boyd L. Harrison
- Pfizer Neuroscience Princeton, 865 Ridge Road, Monmouth Junction, New Jersey 08852
| | - Michael S. Malamas
- Pfizer Neuroscience Princeton, 865 Ridge Road, Monmouth Junction, New Jersey 08852
| | - Nicholas J. Brandon
- Pfizer Neuroscience Princeton, 865 Ridge Road, Monmouth Junction, New Jersey 08852
| | - Thomas Kronbach
- Biotie Therapies GmbH, Meissner Strasse 191, 01445 Radebeul, Germany
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Ben-Cherif W, Gharbi R, Sebai H, Dridi D, Boughattas NA, Ben-Attia M. Neuropharmacological screening of two 1,5-benzodiazepine compounds in mice. C R Biol 2010; 333:214-9. [PMID: 20338539 DOI: 10.1016/j.crvi.2009.09.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Revised: 09/24/2009] [Accepted: 09/26/2009] [Indexed: 10/19/2022]
Abstract
This work investigates whether the two 1,5-benzodiazepine compounds: 4-(2-hydroxyphenyl)-1,5-benzodiazepin-2-one (RG0501) and Benzopyrano [4,3-c] 1,5-benzodiazepine (RG0502) have any neuropharmacological activities. Diazepam and Flunitrazepam were used as drug references. The investigational 1,5-BDZ were tested in vivo for potentiating hexobarbital-induced sleep and pentylenetetrazole (PTZ)-induced seizures. Our study demonstrated that the increase of sleep duration was significantly higher with RG0501 as compared to RG0502. However, RG0502 anticonvulsant effect was more pronounced than that of RG0501 in the range dose of 6.25-37.5 mg.kg(-1). From the 50 mg.kg(-1) dose, RG0502 offered a protection against clonic-tonic seizures as well as lethality (p< or =0.05). The results showed that the required doses to obtain a pharmacological activity were more than those of the references. This difference could be related to the lack of specific substituants responsible for the pharmacological activity in the tested compounds.
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Affiliation(s)
- Wafa Ben-Cherif
- Laboratoire de pharmacologie, faculté de médecine de Monastir, 5019 Monastir, Tunisia
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Gaurav A, Yadav MR, Giridhar R, Gautam V, Singh R. 3D-QSAR studies of 4-quinolone derivatives as high-affinity ligands at the benzodiazepine site of brain GABAA receptors. Med Chem Res 2010. [DOI: 10.1007/s00044-010-9306-5] [Citation(s) in RCA: 4] [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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Jansen M, Rabe H, Strehle A, Dieler S, Debus F, Dannhardt G, Akabas MH, Lüddens H. Synthesis of GABAA receptor agonists and evaluation of their alpha-subunit selectivity and orientation in the GABA binding site. J Med Chem 2008; 51:4430-48. [PMID: 18651727 DOI: 10.1021/jm701562x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Drugs used to treat various disorders target GABA A receptors. To develop alpha subunit selective compounds, we synthesized 5-(4-piperidyl)-3-isoxazolol (4-PIOL) derivatives. The 3-isoxazolol moiety was substituted by 1,3,5-oxadiazol-2-one, 1,3,5-oxadiazol-2-thione, and substituted 1,2,4-triazol-3-ol heterocycles with modifications to the basic piperidine substituent as well as substituents without basic nitrogen. Compounds were screened by [(3)H]muscimol binding and in patch-clamp experiments with heterologously expressed GABA A alpha ibeta 3gamma 2 receptors (i = 1-6). The effects of 5-aminomethyl-3 H-[1,3,4]oxadiazol-2-one 5d were comparable to GABA for all alpha subunit isoforms. 5-piperidin-4-yl-3 H-[1,3,4]oxadiazol-2-one 5a and 5-piperidin-4-yl-3 H-[1,3,4]oxadiazol-2-thione 6a were weak agonists at alpha 2-, alpha 3-, and alpha 5-containing receptors. When coapplied with GABA, they were antagonistic in alpha 2-, alpha 4-, and alpha 6-containing receptors and potentiated alpha 3-containing receptors. 6a protected GABA binding site cysteine-substitution mutants alpha 1F64C and alpha 1S68C from reacting with methanethiosulfonate-ethylsulfonate. 6a specifically covalently modified the alpha 1R66C thiol, in the GABA binding site, through its oxadiazolethione sulfur. These results demonstrate the feasibility of synthesizing alpha subtype selective GABA mimetic drugs.
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Affiliation(s)
- Michaela Jansen
- Department of Medicinal Chemistry, Johannes Gutenberg-UniVersity, Mainz, Germany
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25
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Vijayan RSK, Ghoshal N. Structural basis for ligand recognition at the benzodiazepine binding site of GABAA alpha 3 receptor, and pharmacophore-based virtual screening approach. J Mol Graph Model 2008; 27:286-98. [PMID: 18565775 DOI: 10.1016/j.jmgm.2008.05.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2008] [Revised: 04/29/2008] [Accepted: 05/05/2008] [Indexed: 11/16/2022]
Abstract
Given the heterogeneity of GABA(A) receptor, the pharmacological significance of identifying subtype selective modulators is increasingly being recognized. Thus, drugs selective for GABA(A) alpha(3) receptors are expected to display fewer side effects than the drugs presently in clinical use. Hence we carried out 3D QSAR (three-dimensional quantitative structure-activity relationship) studies on a series of novel GABA(A) alpha(3) subtype selective modulators to gain more insight into subtype affinity. To identify the 3D functional attributes required for subtype selectivity, a chemical feature-based pharmacophore, primarily based on selective ligands representing diverse structural classes was generated. The obtained pseudo receptor model of the benzodiazepine binding site revealed a binding mode akin to "Message-Address" concept. Scaffold hopping was carried out across multi-conformational May Bridge database for the identification of novel chemotypes. Further a focused data reduction approach was employed to choose a subset of enriched compounds based on "Drug likeness" and "Similarity-based" methods. These results taken together could provide impetus for rational design and optimization of more selective and high affinity leads with a potential to have decreased adverse effects.
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Affiliation(s)
- R S K Vijayan
- Structural Biology and Bioinformatics Division, Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
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26
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Finding synthetically versatile and common intermediates for multiple useful products with the aid of a synthesis design system. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.07.073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Piperno A, Chiacchio U, Iannazzo D, Giofrè SV, Romeo G, Romeo R. First Example of Direct RuO4-Catalyzed Oxidation of Isoxazolidines to 3-Isoxazolidones. J Org Chem 2007; 72:3958-60. [PMID: 17419650 DOI: 10.1021/jo070211n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
RuO2/NaIO4 oxidation of 3-unsubstituted isoxazolidines, under ethyl acetate/water biphasic conditions, affords 3-isoxazolidones in good yields. The methodology can be used on both racemic and optically active isoxazolidines.
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Affiliation(s)
- Anna Piperno
- Dipartimento Farmaco-Chimico, Università di Messina, Via SS. Annunziata, Messina 98168, Italy.
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28
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Rabe H, Kronbach C, Rundfeldt C, Lüddens H. The novel anxiolytic ELB139 displays selectivity to recombinant GABAA receptors different from diazepam. Neuropharmacology 2007; 52:796-801. [PMID: 17087982 DOI: 10.1016/j.neuropharm.2006.09.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2006] [Accepted: 09/26/2006] [Indexed: 11/17/2022]
Abstract
A chemically heterogeneous group of compounds acts at the benzodiazepine (BZ) recognition site of the diverse gamma-aminobutyric acid type A (GABA(A)) receptor complexes which can assemble from more than 16 known subunits. Most 1,4-BZs like diazepam recognize all GABA(A)/BZ receptors containing the alpha1-3 or alpha5 together with any beta and the gamma2 subunit. Other compounds differentiate less, e.g. Ro15-4513, that additionally recognizes alpha4- and a6-containing receptors, or differentiate more, e.g. zolpidem, that recognizes preferentially alpha1-containing receptors. Here we describe the functional properties of 1-(4-chloro-phenyl)-4-piperidin-1-yl-1,5-dihydro-imidazol-2-on (ELB139) in the presence and absence of the BZ receptor antagonist flumazenil (Ro15-1788) on recombinant alphaibeta2gamma2 (i=1-5) receptor subtypes expressed in HEK 293 cells. The properties were measured with the whole-cell variation of the patch-clamp technique and compared to those of diazepam. Like the latter, ELB139 did not potentiate GABA-induced currents in alpha4-containing receptors, but it displays functional subtype specificity between alpha1, alpha2, alpha3, and alpha5beta2gamma2 receptors with highest potency in alpha3-containing receptors but highest efficacy in alpha1- or alpha2-containing receptors, respectively. ELB139 acted as a partial agonist on these receptor subtypes reaching 40-50% of the efficacy of diazepam.
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Affiliation(s)
- Holger Rabe
- Laboratory of Molecular Biology, Department of Psychiatry, University of Mainz, Untere Zahlbacher Str. 8, 55131 Mainz, Germany
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