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Smith E, Jones KD, O'Brien L, Argent SP, Salome C, Lefebvre Q, Valery A, Böcü M, Newton GN, Lam HW. Silver(I)-Catalyzed Synthesis of Cuneanes from Cubanes and their Investigation as Isosteres. J Am Chem Soc 2023. [PMID: 37478562 PMCID: PMC10401713 DOI: 10.1021/jacs.3c03207] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2023]
Abstract
Bridged or caged polycyclic hydrocarbons have rigid structures that project substituents into precise regions of 3D space, making them attractive as linking groups in materials science and as building blocks for medicinal chemistry. The efficient synthesis of new or underexplored classes of such compounds is, therefore, an important objective. Herein, we describe the silver(I)-catalyzed rearrangement of 1,4-disubstituted cubanes to cuneanes, which are strained hydrocarbons that have not received much attention since they were first described in 1970. The synthesis of 2,6-disubstituted or 1,3-disubstituted cuneanes can be achieved with high regioselectivities, with the regioselectivity being dependent on the electronic character of the cubane substituents. A preliminary assessment of cuneanes as scaffolds for medicinal chemistry suggests cuneanes could serve as isosteric replacements of trans-1,4-disubstituted cyclohexanes and 1,3-disubstituted benzenes. An analogue of the anticancer drug sonidegib was synthesized, in which the 1,2,3-trisubstituted benzene was replaced with a 1,3-disubstituted cuneane.
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Affiliation(s)
- Elliot Smith
- The GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, Nottingham, NG7 2TU, United Kingdom
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Kieran D Jones
- The GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, Nottingham, NG7 2TU, United Kingdom
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Luke O'Brien
- The GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, Nottingham, NG7 2TU, United Kingdom
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Stephen P Argent
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | | | | | | | - Mina Böcü
- SpiroChem AG, 4058 Basel, Switzerland
| | - Graham N Newton
- The GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, Nottingham, NG7 2TU, United Kingdom
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Hon Wai Lam
- The GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, Nottingham, NG7 2TU, United Kingdom
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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Levitre G, Keess S, Molander GA. Photoinduced Diastereoselective Aminoalkylation of Cubanes. Org Lett 2023. [PMID: 37216214 DOI: 10.1021/acs.orglett.3c01223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The unique properties of rigid, nonconjugated hydrocarbons provide many opportunities to design molecular building blocks for a variety of applications, but the development of suitable conditions for alkylation of cubanes is quite challenging. Herein, a photoinduced method for aminoalkylation of cubanes is reported. The benign conditions reported allow the incorporation of a wide variety of (hetero)arylimine reaction partners with broad functional group tolerance and high diastereoselectivity.
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Affiliation(s)
- Guillaume Levitre
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Sebastian Keess
- Medicinal Chemistry Department, Neuroscience Discovery Research, AbbVie Deutschland GmbH & Co. KG, Ludwigshafen 67061, Germany
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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Locke GM, Bernhard SSR, Senge MO. Nonconjugated Hydrocarbons as Rigid-Linear Motifs: Isosteres for Material Sciences and Bioorganic and Medicinal Chemistry. Chemistry 2019; 25:4590-4647. [PMID: 30387906 DOI: 10.1002/chem.201804225] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 10/20/2018] [Indexed: 01/02/2023]
Abstract
Nonconjugated hydrocarbons, like bicyclo[1.1.1]pentane, bicyclo[2.2.2]octane, triptycene, and cubane are a unique class of rigid linkers. Due to their similarity in size and shape they are useful mimics of classic benzene moieties in drugs, so-called bioisosteres. Moreover, they also fulfill an important role in material sciences as linear linkers, in order to arrange various functionalities in a defined spatial manner. In this Review article, recent developments and usages of these special, rectilinear systems are discussed. Furthermore, we focus on covalently linked, nonconjugated linear arrangements and discuss the physical and chemical properties and differences of individual linkers, as well as their application in material and medicinal sciences.
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Affiliation(s)
- Gemma M Locke
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
| | - Stefan S R Bernhard
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
| | - Mathias O Senge
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
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Abstract
Cubane is a highly strained saturated hydrocarbon system that has historically been of interest in theoretical organic chemistry. More recently it has become a molecule of interest for biological applications due to its inherent stability and limited toxicity. Of greater significance is the ability to potentially functionalize cubane at each of its carbon atoms, providing complex biologically active molecules with unique spatial arrangements for probing active sites. These characteristics have led to an increased use of cubane in pharmaceutically relevant molecules. In this Perspective we describe synthetic methodology for accessing a range of functionalized cubanes and their applications in pharmaceuticals. We also provide some perspectives on challenges and future directions in the advancement of this field.
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Affiliation(s)
- Tristan A Reekie
- School of Chemistry , The University of Sydney , Sydney , NSW 2006 , Australia
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences , University of Queensland , Brisbane , QLD 4072 , Australia
| | - Louis M Rendina
- School of Chemistry , The University of Sydney , Sydney , NSW 2006 , Australia
| | - Michael Kassiou
- School of Chemistry , The University of Sydney , Sydney , NSW 2006 , Australia
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Ivleva EA, Pogulyaiko AV, Klimochkin YN. Synthesis of (3-Hydroxyadamantan-1-yl)methanols. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2018. [DOI: 10.1134/s107042801809004x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Dilly S, Liégeois JF. Structural Insights into 5-HT1A/D4 Selectivity of WAY-100635 Analogues: Molecular Modeling, Synthesis, and in Vitro Binding. J Chem Inf Model 2016; 56:1324-31. [PMID: 27331407 DOI: 10.1021/acs.jcim.5b00753] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The resurgence of interest in 5-HT1A receptors as a therapeutic target requires the existence of highly selective 5-HT1A ligands. To date, WAY-100635 has been the prototypical antagonist of these receptors. However, this compound also has significant affinity for and activity at D4 dopamine receptors. In this context, this work was aimed at better understanding the 5-HT1A/D4 selectivity of WAY-100635 and analogues from a structural point of view. In silico investigations revealed two key interactions for the 5-HT1A/D4 selectivity of WAY-100635 and analogues. First, a hydrogen bond only found with the Ser 7.36 of D4 receptor appeared to be the key for a higher D4 affinity for newly synthesized aza analogues. The role of Ser 7.36 was confirmed as the affinity of aza analogues for the mutant D4 receptor S7.36A was reduced. Then, the formation of another hydrogen bond with the conserved Ser 5.42 residue appeared to be also critical for D4 binding.
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Affiliation(s)
- Sébastien Dilly
- Laboratory of Medicinal Chemistry and C.I.R.M. and ‡Laboratory of Pharmacology and GIGA-Neuroscience, University of Liège , avenue Hippocrate, 15 (B36), B-4000 Liège 1, Belgium
| | - Jean-François Liégeois
- Laboratory of Medicinal Chemistry and C.I.R.M. and ‡Laboratory of Pharmacology and GIGA-Neuroscience, University of Liège , avenue Hippocrate, 15 (B36), B-4000 Liège 1, Belgium
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Mukherjee J, Bajwa AK, Wooten DW, Hillmer AT, Pan ML, Pandey SK, Saigal N, Christian BT. Comparative assessment of (18) F-Mefway as a serotonin 5-HT1A receptor PET imaging agent across species: Rodents, nonhuman primates, and humans. J Comp Neurol 2016; 524:1457-71. [PMID: 26509362 PMCID: PMC4783179 DOI: 10.1002/cne.23919] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 08/22/2015] [Accepted: 10/23/2015] [Indexed: 02/02/2023]
Abstract
We have developed (18) F-trans-Mefway ((18) F-Mefway) for positron emission tomography (PET) imaging studies of serotonin 5-HT1A receptors which are implicated in various brain functions. Translation of imaging the 5-HT1A receptor in animal models to humans will facilitate an understanding of the role of the receptor in human brain disorders. We report comparative brain distribution of (18) F-Mefway in normal mice, rats, monkeys, and healthy human volunteers. Mefway was found to be very selective, with subnanomolar affinity for the 5-HT1A receptor. Affinities of >55 nM were found for all other human-cloned receptor subtypes tested. Mefway was found to be a poor substrate (>30 μM) for the multidrug resistance 1 protein, suggesting low likelihood of brain uptake being affected by P-glycoprotein. Cerebellum was used as a reference region in all imaging studies across all species due to the low levels of (18) F-Mefway binding. Consistent binding of (18) F-Mefway in cortical regions, hippocampus, and raphe was observed across all species. (18) F-Mefway in the human brain regions correlated with the known postmortem distribution of 5-HT1A receptors. Quantitation of raphe was affected by the resolution of the PET scanners in rodents, whereas monkeys and humans showed a raphe to cerebellum ratio of approximately 3. (18) F-Mefway appears to be an effective 5-HT1A receptor imaging agent in all models, including humans. (18) F-Mefway therefore may be used to quantify 5-HT1A receptor distribution in brain regions for the study of various CNS disorders. J. Comp. Neurol. 524:1457-1471, 2016. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Jogeshwar Mukherjee
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, 92697-5000
| | - Alisha K Bajwa
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, 92697-5000
| | - Dustin W Wooten
- Department of Medical Physics and Waisman Center, University of Wisconsin, Madison, Wisconsin, 53705
| | - Ansel T Hillmer
- Department of Medical Physics and Waisman Center, University of Wisconsin, Madison, Wisconsin, 53705
| | - Min-Liang Pan
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, 92697-5000
| | - Suresh K Pandey
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, 92697-5000
| | - Neil Saigal
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, 92697-5000
| | - Bradley T Christian
- Department of Medical Physics and Waisman Center, University of Wisconsin, Madison, Wisconsin, 53705
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Zhu XH, Sun J, Wang S, Bu W, Yao MN, Gao K, Song Y, Zhao JY, Lu CT, Zhang EH, Yang ZF, Wen AD. Synthesis, crystal structure, superoxide scavenging activity, anticancer and docking studies of novel adamantyl nitroxide derivatives. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.12.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Hazari PP, Prakash S, Meena VK, Singh N, Chuttani K, Chadha N, Singh P, Kukreti S, Mishra AK. Synthesis, preclinical evaluation and molecular modelling of macrocyclic appended 1-(2-methoxyphenyl)piperazine for 5-HT1A neuroreceptor imaging. RSC Adv 2016. [DOI: 10.1039/c5ra13432c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient approach in the design and synthesis of a multi-functional chelating agent based on 1-(2-methoxyphenyl)piperazine for targeting 5-HT1A receptors in brain was envisaged.
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Affiliation(s)
- Puja Panwar Hazari
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Delhi-110054
- India
| | - Surbhi Prakash
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Delhi-110054
- India
- Department of Chemistry
| | - Virendra Kumar Meena
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Delhi-110054
- India
- Department of Chemistry
| | - Niraj Singh
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Delhi-110054
- India
| | - Krishna Chuttani
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Delhi-110054
- India
| | - Nidhi Chadha
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Delhi-110054
- India
| | - Pooja Singh
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Delhi-110054
- India
- Department of Chemistry
| | | | - Anil Kumar Mishra
- Division of Cyclotron and Radiopharmaceutical Sciences
- Institute of Nuclear Medicine and Allied Sciences
- Delhi-110054
- India
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Biegasiewicz KF, Griffiths JR, Savage GP, Tsanaktsidis J, Priefer R. Cubane: 50 years later. Chem Rev 2015; 115:6719-45. [PMID: 26102302 DOI: 10.1021/cr500523x] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kyle F Biegasiewicz
- †Department of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
| | - Justin R Griffiths
- ‡Department of Chemistry, University at Buffalo, Buffalo, New York 14260-1660, United States
| | - G Paul Savage
- §Ian Wark Laboratory, CSIRO Manufacturing Flagship, Bayview Avenue, Clayton, Victoria 3168, Australia
| | - John Tsanaktsidis
- §Ian Wark Laboratory, CSIRO Manufacturing Flagship, Bayview Avenue, Clayton, Victoria 3168, Australia
| | - Ronny Priefer
- ∥College of Pharmacy, Western New England University, Springfield, Massachusetts 01119, United States
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Abstract
18F-Mefway (N-{2-[4-(2'-methoxyphenyl)piperazinyl]ethyl}-N-(2-pyridyl)-N-(4'-18F-fluoro-methylcyclohexane)carboxamide) was developed and evaluated for use as a PET ligand for imaging 5-HT1A receptors. Ongoing studies of 18F-Mefway have shown it to be an effective PET radiotracer. We have synthesized isomers of Mefway by changing the position of the methyl-group in attempts to evaluate stability for imaging purposes. 2-Methyl-, 3-methyl-, and 4-methyl-cyclohexane-1-carboxylic acids and 3-carbomethoxy-, 4-carbomethoxycyclohexane-1-carboxylic acids were coupled with WAY-100634 to provide the methylcyclohexyl derivatives (2-, 3- and 4-methyl). Mefway and 3-Mefway analogs were prepared by reduction of carbomethoxy-derivatives followed by fluorination. In vitro binding affinities for the methylated derivatives in rat brain homogenates was found to be 10.4 nM (2-methyl), 77 nM (3-methyl) and 21.5 nM (4-methyl). Binding affinity of 3-Mefway and 4-Mefway was found to be 17.4 nM and 6.26 nM, respectively. Our results suggest that 3-methyl/3-fluoromethyl substituent has approx. 3-fold lower affinities compared to the 4-methyl/4-fluoromethyl substituent.
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Wlochal J, Davies RDM, Burton J. Cubanes in Medicinal Chemistry: Synthesis of Functionalized Building Blocks. Org Lett 2014; 16:4094-7. [DOI: 10.1021/ol501750k] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Joanna Wlochal
- Oncology, Innovative
Medicines, AstraZeneca,
Alderley Park, Macclesfield, Cheshire SK10
4TG, U.K
| | - Robert D. M. Davies
- Oncology, Innovative
Medicines, AstraZeneca,
Alderley Park, Macclesfield, Cheshire SK10
4TG, U.K
| | - Jonathan Burton
- Chemistry
Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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García G, Abet V, Alajarín R, Álvarez-Builla J, Delgado M, García-García L, Bascuñana-Almarcha P, Peña-Salcedo C, Kelly J, Pozo MA. N-(4-[(18)F]-fluoropyridin-2-yl)-N-{2-[4-(2-methoxyphenyl)piperazin-1-yl]ethyl}carboxamides as analogs of WAY100635. New PET tracers of serotonin 5-HT(1A) receptors. Eur J Med Chem 2014; 85:795-806. [PMID: 25171752 DOI: 10.1016/j.ejmech.2014.07.096] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 07/24/2014] [Accepted: 07/25/2014] [Indexed: 10/25/2022]
Abstract
N-(4-[(18)F]-Fluoropyridin-2-yl)-N-{2-[4-(2-methoxyphenyl)piperazin-1-yl]ethyl}-carboxamides were prepared by labeling their 4-nitropyridin-2-yl precursors through nitro substitution by the (18)F anion. In vitro and in vivo tests showed that the cyclohexanecarboxamide derivative is a reversible, selective and high affinity 5-HT1A receptor antagonist (IC50 = 0.29 nM, ki = 0.18 nM) with high brain uptake, slow brain clearance and stability to defluorination when compared with conventional standards. This PET radioligand is a promising candidate for an improved in vivo quantification of 5-HT1A receptors in neuropsychiatric disorders.
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Affiliation(s)
- Gonzalo García
- Departamento de Química Orgánica, Universidad de Alcalá, Alcalá de Henares, Madrid 28871, Spain
| | - Valentina Abet
- Departamento de Química Orgánica, Universidad de Alcalá, Alcalá de Henares, Madrid 28871, Spain
| | - Ramón Alajarín
- Departamento de Química Orgánica, Universidad de Alcalá, Alcalá de Henares, Madrid 28871, Spain
| | - Julio Álvarez-Builla
- Departamento de Química Orgánica, Universidad de Alcalá, Alcalá de Henares, Madrid 28871, Spain.
| | - Mercedes Delgado
- CAI Cartografía Cerebral, Instituto Pluridisciplinar UCM, Paseo Juan XXIII, 1, Madrid 28040, Spain
| | - Luis García-García
- CAI Cartografía Cerebral, Instituto Pluridisciplinar UCM, Paseo Juan XXIII, 1, Madrid 28040, Spain
| | - Pablo Bascuñana-Almarcha
- CAI Cartografía Cerebral, Instituto Pluridisciplinar UCM, Paseo Juan XXIII, 1, Madrid 28040, Spain
| | - Carmen Peña-Salcedo
- Instituto Tecnológico PET, Calle Manuel Bartolomé Cossío 10, Madrid 28040, Spain
| | - James Kelly
- Instituto Tecnológico PET, Calle Manuel Bartolomé Cossío 10, Madrid 28040, Spain
| | - Miguel A Pozo
- CAI Cartografía Cerebral, Instituto Pluridisciplinar UCM, Paseo Juan XXIII, 1, Madrid 28040, Spain; Instituto Tecnológico PET, Calle Manuel Bartolomé Cossío 10, Madrid 28040, Spain.
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Falkiner MJ, Littler SW, McRae KJ, Savage GP, Tsanaktsidis J. Pilot-Scale Production of Dimethyl 1,4-Cubanedicarboxylate. Org Process Res Dev 2013. [DOI: 10.1021/op400181g] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Michael J. Falkiner
- CSIRO Materials Science & Engineering, Ian Wark Laboratory, Bayview Avenue, Clayton Victoria 3168, Australia
| | - Stuart W. Littler
- CSIRO Materials Science & Engineering, Ian Wark Laboratory, Bayview Avenue, Clayton Victoria 3168, Australia
| | - Kenneth J. McRae
- CSIRO Materials Science & Engineering, Ian Wark Laboratory, Bayview Avenue, Clayton Victoria 3168, Australia
| | - G. Paul Savage
- CSIRO Materials Science & Engineering, Ian Wark Laboratory, Bayview Avenue, Clayton Victoria 3168, Australia
| | - John Tsanaktsidis
- CSIRO Materials Science & Engineering, Ian Wark Laboratory, Bayview Avenue, Clayton Victoria 3168, Australia
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Hassanzadeh L, Erfani M, Najafi R, Shafiei M, Amini M, Shafiee A, Ebrahimi SES. Synthesis, radiolabeling and bioevaluation of a novel arylpiperazine derivative containing triazole as a 5-HT1A receptor imaging agents. Nucl Med Biol 2012; 40:227-32. [PMID: 23141548 DOI: 10.1016/j.nucmedbio.2012.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Revised: 09/20/2012] [Accepted: 10/03/2012] [Indexed: 11/29/2022]
Abstract
INTRODUCTION It has been recognized that serotonin plays a main role in various pathological conditions such as anxiety, depression, aggressiveness, schizophrenia, suicidal behavior, panic and autism. 1-(2-Methoxyphenyl) piperazine pharmacophore, a fragment of the true 5-HT(1A) antagonist WAY100635, is found in numerous selective 5-HT(1A) imaging agents. In this paper, we have reported the synthesis of a novel derivative of 1-(2-methoxyphenyl) piperazine that is labeled with (99m)Tc (CO)(3) via click chemistry. METHODS The bidentate alkyne, propargylglycine was reacted with phenyl piperazine triazole derivative in the presence of a catalytic amount of Cu (I) to form tridentate ligand. The ligand was radiolabeled with the precursor [(99m)Tc] [(H(2)O)(3) (CO)(3)](+) and characterized by HPLC. The bioevaluation of radio labeled ligand was carried out in rats. RESULTS Triazole complex was labeled by (99m)Tc-tricarbonyl and its radiochemical yield was more than >95% which was determined by HPLC. In vivo stability studies in human serum albumin show a 93% ratio of complex after a 24h period. The calculated partition coefficient (logP) was 0.34±0.02. Receptor binding assays indicated about 70% specific binding of radioligand to 5-HT(1A) receptors. Biodistribution studies have shown brain hippocampus uptake of 0.40±0.08 %ID/g at 30 min post injection. CONCLUSIONS Results indicate that this (99m)Tc-tricabonyl-arylpiperazine derivative has specific binding to 5-HT(1A) receptors and presented suitable characters for its use as a CNS imaging agent.
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Affiliation(s)
- Leila Hassanzadeh
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
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Al Hussainy R, Verbeek J, der Born DV, Molthoff C, Booij J, Herscheid J(KD. Synthesis, biodistribution and PET studies in rats of 18F-Labeled bridgehead fluoromethyl analogues of WAY-100635. Nucl Med Biol 2012; 39:1068-76. [DOI: 10.1016/j.nucmedbio.2012.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Revised: 04/10/2012] [Accepted: 04/15/2012] [Indexed: 10/28/2022]
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17
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Mangin F, Dilly S, Joly B, Scuvée-Moreau J, Evans J, Setola V, Roth BL, Liégeois JF. Moderate chemical modifications of WAY-100635 improve the selectivity for 5-HT1A versus D4 receptors. Bioorg Med Chem Lett 2012; 22:4550-4. [DOI: 10.1016/j.bmcl.2012.05.119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 05/30/2012] [Accepted: 05/30/2012] [Indexed: 10/28/2022]
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Alanazi AM, El-Emam AA, El-Brollosy NR, Ng SW, Tiekink ERT. 4-Benzyl-N-methyl-piperazine-1-carbothio-amide. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o712-3. [PMID: 22412597 PMCID: PMC3295486 DOI: 10.1107/s1600536812005685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 02/08/2012] [Indexed: 11/25/2022]
Abstract
The asymmetric unit in the title thiourea derivative, C13H19N3S, comprises three independent molecules (A, B and C). The thiourea groups are superimposable for the three molecules, but there are significant conformational differences. Molecules A and B are approximate mirror images of each other, and molecule C has an intermediate conformation. The dihedral angles between the thiourea groups and the phenyl rings are 52.10 (5), 63.29 (5) and 66.46 (6)° in molecules A, B and C, respectively. Each independent molecule self-associates into a supramolecular chain along [100] via N—H⋯S hydrogen bonds. Molecules of A and B assemble into layers four molecules thick in the ac plane via C—H⋯S and C—H⋯π interactions. Molecules of C self-assemble into layers in the ac plane via C—H⋯S interactions. The layers stack along the b axis with no specific interactions between them.
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