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Bhattacharjee P, Iyer MR. Rational Design, Synthesis, and Evaluation of Fluorescent CB 2 Receptor Ligands for Live-Cell Imaging: A Comprehensive Review. Pharmaceuticals (Basel) 2023; 16:1235. [PMID: 37765043 PMCID: PMC10534640 DOI: 10.3390/ph16091235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/21/2023] [Accepted: 08/25/2023] [Indexed: 09/29/2023] Open
Abstract
The cannabinoid receptors CB1 and CB2 are class A G protein-coupled receptors (GPCRs) that are activated via endogenous lipids called endocannabinoids. The endocannabinoid system (ECS) plays a critical role in the regulation of several physiological states and a wide range of diseases. In recent years, drug discovery approaches targeting the cannabinoid type 2 receptor (CB2R) have gained prominence. Particular attention has been given to selective agonists targeting the CB2 receptors to circumvent the neuropsychotropic side effects associated with CB1 receptors. The pharmacological modulation of CB2R holds therapeutic promise for various diseases, such as inflammatory disorders and immunological conditions, as well as pain management and cancer treatment. Recently, the utilization of fluorescent probes has emerged as a valuable technique for investigating the interactions between ligands and proteins at an exceptional level of spatial and temporal precision. In this review, we aim to examine the progress made in the development of fluorescent probes targeting CB2 receptors and highlight their significance in facilitating the successful clinical translation of CB2R-based therapies.
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Affiliation(s)
| | - Malliga R. Iyer
- Section on Medicinal Chemistry, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, 5625 Fishers Lane, Rockville, MD 20852, USA
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2
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The chronological evolution of fluorescent GPCR probes for bioimaging. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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3
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Pant S, Nain S. Recent Advances in the Development of Pyrimidine-based CNS Agents. Curr Drug Discov Technol 2023; 20:14-28. [PMID: 36200187 DOI: 10.2174/1570163819666221003094402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 07/02/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND In the past few decades, considerable progress has been made in CNS drug discovery, and various new CNS agents have been developed. Pyrimidine is an important scaffold in the area of medicinal chemistry. Recently, pyrimidine-containing compounds have been successfully designed as potent CNS agents. Substantial research has been carried out on pyrimidine-bearing compounds to treat different disorders of CNS in various animal models. METHODS Utilizing various databases, including Google Scholar, PubMed, Science Direct, and Web of Science, the literature review was conducted. The specifics of significant articles were discussed with an emphasis on the potency of pyrimidines derivatives possessing CNS activity. RESULTS Recent papers indicating pyrimidine derivatives with CNS activity were incorporated into the manuscript. (46) to (50) papers included different pyrimidine derivatives as 5-HT agonist/antagonists, (62) to (67) as adenosine agonist/antagonist, (70) to (75) as anticonvulsant agents, (80) to (83) as cannabinoid receptor agonists, (102) to (103) as nicotinic and (110) as muscarinic receptor agonists. The remaining papers (113) to (114) represented pyrimidine-based molecular imaging agents. CONCLUSION Pyrimidine and its derivatives have been studied in detail to evaluate their efficacy in overcoming multiple central nervous system disorders. The article covers the current updates on pyrimidine-based compounds as potent CNS and molecular imaging agents and will definitely provide a better platform for the development of potent pyrimidine-based CNS drugs in the near future.
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Affiliation(s)
- Swati Pant
- Department of Pharmacy, Banasthali Vidyapith, Banasthali, Rajasthan, 304022, India
| | - Sumitra Nain
- Department of Pharmacy, Banasthali Vidyapith, Banasthali, Rajasthan, 304022, India
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4
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Wu YR, Tang JQ, Zhang WN, Zhuang CL, Shi Y. Rational drug design of CB2 receptor ligands: from 2012 to 2021. RSC Adv 2022; 12:35242-35259. [PMID: 36540233 PMCID: PMC9730932 DOI: 10.1039/d2ra05661e] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 12/03/2022] [Indexed: 08/29/2023] Open
Abstract
Cannabinoid receptors belong to the large family of G-protein-coupled receptors, which can be divided into two receptor types, cannabinoid receptor type-1 (CB1) and cannabinoid receptor type-2 (CB2). Marinol, Cesamet and Sativex are marketed CB1 drugs which are still in use and work well, but the central nervous system side effects caused by activation CB1, which limited the development of CB1 ligands. So far, no selective CB2 ligand has been approved for marketing, but lots of its ligands in the clinical stage and pre-clinical stage have positive effects on the treatment of some disease models and have great potential for development. Most selective CB2 agonists are designed and synthesized based on non-selective CB2 agonists through the classical med-chem strategies, e.g. molecular hybridization, scaffold hopping, bioisosterism, etc. During these processes, the balance between selectivity, activity, and pharmacokinetic properties needs to be achieved. Hence, we summarized some reported ligands on the basis of the optimization strategies in recent 10 years, and the limitations and future directions.
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Affiliation(s)
- Yan-Ran Wu
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
| | - Jia-Qin Tang
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
| | - Wan-Nian Zhang
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
- School of Pharmacy, Second Military Medical University 325 Guohe Road Shanghai 200433 China
| | - Chun-Lin Zhuang
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
- School of Pharmacy, Second Military Medical University 325 Guohe Road Shanghai 200433 China
| | - Ying Shi
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
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5
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Hammouda MM, Gaffer HE, Elattar KM. Insights into the medicinal chemistry of heterocycles integrated with a pyrazolo[1,5- a]pyrimidine scaffold. RSC Med Chem 2022; 13:1150-1196. [PMID: 36325400 PMCID: PMC9580358 DOI: 10.1039/d2md00192f] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/25/2022] [Indexed: 09/10/2023] Open
Abstract
Pyrazolo[1,5-a]pyrimidines are the dominant motif of many drugs; for instance, zaleplon and indiplon are sedative agents and ocinaplon was identified as an anxiolytic agent. The importance of this class of compounds lies in its varied and significant biological activities, and accordingly, considerable methods have been devised to prepare these compounds. Hence, other derivatives of this class of compounds were prepared by substitution reactions with different nucleophiles exploiting the activity of groups linked to the ring carbon and nitrogen atoms. The methods used vary through the condensation reactions of the aminopyrazoles with 1,2-allenic, enaminonitriles, enaminones, 1,3-diketones, unsaturated nitriles, or unsaturated ketones. Alternatively, these compounds are prepared through the reactions of acyclic reagents, as these methods were recently developed efficiently with high yields. The current review highlighted the recent progress of the therapeutic potential of pyrazolo[1,5-a]pyrimidines as antimicrobial, anticancer, antianxiety, anti-proliferative, analgesic, and antioxidant agents, carboxylesterase, translocator protein and PDE10A inhibitors, and selective kinase inhibitors.
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Affiliation(s)
- Mohamed M Hammouda
- Department of Chemistry, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University Al-Kharj 11942 Saudi Arabia
- Chemistry Department, Faculty of Science, Mansoura University El-Gomhoria Street Mansoura 35516 Egypt
| | - Hatem E Gaffer
- Dyeing and Printing Department, Textile Research Division, National Research Center Dokki Cairo 12622 Egypt
| | - Khaled M Elattar
- Unit of Genetic Engineering and Biotechnology, Faculty of Science, Mansoura University El-Gomhoria Street Mansoura 35516 Egypt +201010655354
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6
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Li H, Kim Y, Jung H, Hyun JY, Shin I. Near-infrared (NIR) fluorescence-emitting small organic molecules for cancer imaging and therapy. Chem Soc Rev 2022; 51:8957-9008. [DOI: 10.1039/d2cs00722c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We discuss recent advances made in the development of NIR fluorescence-emitting small organic molecules for tumor imaging and therapy.
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Affiliation(s)
- Hui Li
- Department of Chemistry, Yonsei University, 03722 Seoul, Republic of Korea
| | - Yujun Kim
- Department of Chemistry, Yonsei University, 03722 Seoul, Republic of Korea
| | - Hyoje Jung
- Department of Chemistry, Yonsei University, 03722 Seoul, Republic of Korea
| | - Ji Young Hyun
- Department of Drug Discovery, Data Convergence Drug Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Injae Shin
- Department of Chemistry, Yonsei University, 03722 Seoul, Republic of Korea
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7
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Elattar KM, El-Mekabaty A. Bicyclic 5-6 Systems: Comprehensive Synthetic Strategies for the Annulations of Pyrazolo[ 1,5-a]pyrimidines. Curr Org Synth 2021; 18:547-586. [PMID: 33966620 DOI: 10.2174/1570179418666210509015108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/16/2021] [Accepted: 03/25/2021] [Indexed: 11/22/2022]
Abstract
Pyrazolopyrimidines are a privileged class of 5-6 bicyclic systems with three or four nitrogen atoms, including four possible isomeric structures. The significance of this class of compounds is that they can be applied in medical and pharmaceutical fields due to their unlimited biological aptitude, hence it is the basic skeleton of several synthetic drugs. The current review aimed to highlight all the synthetic routes that have been applied to construct the pyrazolo[1,5-a]pyrimidine ring systems up to date. The sections in this study included the synthesis of pyrazolo[1,5- a]pyrimidines by condensation reactions of 5-aminopyrazoles with each of β-diketones, 1,5-diketones, β- ketoaldehydes, α-cyanoaldehydes, β-enaminones, enamines, enaminonitriles, ethers, with unsaturated ketones, unsaturated thiones, unsaturated esters, unsaturated dienones "1,2-allenic", unsaturated aldehydes, unsaturated imines, and unsaturated nitriles. The routes adopted to synthesize this class of heterocyclic compounds were extended for ring construction from acyclic reagents and multicomponent reactions under catalytic or catalyst-free conditions.
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Affiliation(s)
- Khaled M Elattar
- Chemistry Department, Faculty of Science, Mansoura University, El-Gomhoria Street, Mansoura, 35516, Egypt
| | - Ahmed El-Mekabaty
- Chemistry Department, Faculty of Science, Mansoura University, El-Gomhoria Street, Mansoura, 35516, Egypt
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8
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Hamilton AJ, Payne AD, Mocerino M, Gunosewoyo H. Imaging Cannabinoid Receptors: A Brief Collection of Covalent and Fluorescent Probes for CB1 and CB2 Receptors. Aust J Chem 2021. [DOI: 10.1071/ch21007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
There has been an expanding public interest towards the notion that modulation of the sophisticated endocannabinoid system can lead to various therapeutic benefits that are yet to be fully explored. In recent years, the drug discovery paradigm in this field has been largely based on the development of selective CB2 receptor agonists, avoiding the unwanted CB1 receptor-mediated psychoactive side effects. Mechanistically, target engagement studies are crucial for confirming the ligand–receptor interaction and the subsequent biological cascades that lead to the observed therapeutic effects. Concurrently, imaging techniques for visualisation of cannabinoid receptors are increasingly reported in the literature. Small molecule imaging tools ranging from phytocannabinoids such as tetrahydrocannabinol (THC) and cannabidiol (CBD) to the endocannabinoids as well as the purely synthetic cannabimimetics, have been explored to date with varying degrees of success. This Review will cover currently known photoactivatable, electrophilic, and fluorescent ligands for both the CB1 and CB2 receptors. Structural insights from techniques such as ligand-assisted protein structure (LAPS) and the discovery of novel allosteric modulators are significant additions for better understanding of the endocannabinoid system. There has also been a plethora of fluorescent conjugates that have been assessed for their binding to cannabinoid receptors as well as their potential for cellular imaging. More recently, bifunctional probes containing either fluorophores or electrophilic tags are becoming more prevalent in the literature. Collectively, these molecular tools are invaluable in demonstrating target engagement within the human endocannabinoid system.
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9
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Basagni F, Rosini M, Decker M. Functionalized Cannabinoid Subtype 2 Receptor Ligands: Fluorescent, PET, Photochromic and Covalent Molecular Probes. ChemMedChem 2020; 15:1374-1389. [PMID: 32578963 PMCID: PMC7497013 DOI: 10.1002/cmdc.202000298] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Indexed: 01/01/2023]
Abstract
Cannabinoid subtype 2 receptors (CB2 Rs) are G protein-coupled receptors (GPCRs) belonging to the endocannabinoid system, a complex network of signalling pathways leading to the regulation of key physiological processes. Interestingly, CB2 Rs are strongly up-regulated in pathological conditions correlated with the onset of inflammatory events like cancer and neurodegenerative diseases. Therefore, CB2 Rs represent an important biological target for therapeutic as well as diagnostic purposes. No CB2 R-selective drugs are yet on the market, thus underlining a that deeper comprehension of CB2 Rs' complex activation pathways and their role in the regulation of diseases is needed. Herein, we report an overview of pharmacological and imaging tools such as fluorescent, positron emission tomography (PET), photochromic and covalent selective CB2 R ligands. These molecular probes can be used in vitro as well as in vivo to investigate and explore the unravelled role(s) of CB2 Rs, and they can help to design suitable CB2 R-targeted drugs.
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Affiliation(s)
- Filippo Basagni
- Pharmaceutical and Medicinal Chemistry Institute of Pharmacy and Food ChemistryJulius Maximilian University of WürzburgAm Hubland97074WürzburgGermany
- Department of Pharmacy and BiotechnologyUniversity of BolognaVia Belmeloro 640126BolognaItaly
| | - Michela Rosini
- Department of Pharmacy and BiotechnologyUniversity of BolognaVia Belmeloro 640126BolognaItaly
| | - Michael Decker
- Pharmaceutical and Medicinal Chemistry Institute of Pharmacy and Food ChemistryJulius Maximilian University of WürzburgAm Hubland97074WürzburgGermany
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10
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Mugnaini C, Kostrzewa M, Bryk M, Mahmoud AM, Brizzi A, Lamponi S, Giorgi G, Ferlenghi F, Vacondio F, Maccioni P, Colombo G, Mor M, Starowicz K, Di Marzo V, Ligresti A, Corelli F. Design, Synthesis, and Physicochemical and Pharmacological Profiling of 7-Hydroxy-5-oxopyrazolo[4,3- b]pyridine-6-carboxamide Derivatives with Antiosteoarthritic Activity In Vivo. J Med Chem 2020; 63:7369-7391. [PMID: 32515588 DOI: 10.1021/acs.jmedchem.0c00595] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The hallmark of joint diseases, such as osteoarthritis (OA), is pain, originating from both inflammatory and neuropathic components, and compounds able to modulate the signal transduction pathways of the cannabinoid type-2 receptor (CB2R) can represent a helpful option in the treatment of OA. In this perspective, a set of 18 cannabinoid type-2 receptor (CB2R) ligands was developed based on an unprecedented structure. With the aim of improving the physicochemical properties of previously reported 4-hydroxy-2-quinolone-3-carboxamides, a structural optimization program led to the discovery of isosteric 7-hydroxy-5-oxopyrazolo[4,3-b]pyridine-6-carboxamide derivatives. These new compounds are endowed with high affinity for the CB2R and moderate to good selectivity over the cannabinoid type-1 receptor (CB1R), associated with good physicochemical characteristics. As to the functional activity at the CB2R, compounds able to act either as agonists or as inverse agonists/antagonists were discovered. Among them, compound 51 emerged as a potent CB2R agonist able to reduce pain in rats carrying OA induced by injection of monoiodoacetic acid (MIA).
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Affiliation(s)
- Claudia Mugnaini
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy
| | - Magdalena Kostrzewa
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, National Research Council of Italy, Via Campi Flegrei 34, 80078 Pozzuoli, Napoli, Italy.,Institute of Genetics and Biophysics, National Research Council of Italy, Via Pietro Castellino 111, 80131 Napoli, Italy
| | - Marta Bryk
- Institute of Genetics and Biophysics, National Research Council of Italy, Via Pietro Castellino 111, 80131 Napoli, Italy
| | - Ali Mokhtar Mahmoud
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, National Research Council of Italy, Via Campi Flegrei 34, 80078 Pozzuoli, Napoli, Italy
| | - Antonella Brizzi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy
| | - Stefania Lamponi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy
| | - Gianluca Giorgi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy
| | - Francesca Ferlenghi
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Federica Vacondio
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Paola Maccioni
- Institute of Neuroscience, National Research Council of Italy, S.S. 554, km 4,500, 09042 Monserrato, Cagliari, Italy
| | - Giancarlo Colombo
- Institute of Neuroscience, National Research Council of Italy, S.S. 554, km 4,500, 09042 Monserrato, Cagliari, Italy
| | - Marco Mor
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Katarzyna Starowicz
- Department of Neurochemistry, Institute of Pharmacology, Polish Academy of Sciences, ul. Smetna 12, 31-343 Cracow, Poland
| | - Vincenzo Di Marzo
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, National Research Council of Italy, Via Campi Flegrei 34, 80078 Pozzuoli, Napoli, Italy
| | - Alessia Ligresti
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, National Research Council of Italy, Via Campi Flegrei 34, 80078 Pozzuoli, Napoli, Italy
| | - Federico Corelli
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy
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11
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Synthesis of Biologically Active 6-(Tolylhydrazinylidene)Pyrazolo[1,5-a]Pyrimidinones. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02652-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Shaabani A, Nazeri MT, Afshari R. 5-Amino-pyrazoles: potent reagents in organic and medicinal synthesis. Mol Divers 2018; 23:751-807. [PMID: 30552550 DOI: 10.1007/s11030-018-9902-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 12/04/2018] [Indexed: 12/31/2022]
Abstract
5-Amino-pyrazoles have proven to be a class of fascinating and privileged organic tools for the construction of diverse heterocyclic or fused heterocyclic scaffolds. This review presents comprehensively the applications of 5-amino-pyrazoles as versatile synthetic building blocks in the synthesis of remarkable organic molecules with an emphasis on versatile functionalities. Following a brief introduction of synthesis methods, planning strategies to construct organic compounds, particularly diverse heterocyclic scaffolds, such as poly-substituted heterocyclic compounds and fused heterocyclic compounds via 5-amino-pyrazoles, have been summarized. Fused heterocycles are classified as bicyclic, tricyclic, tetracyclic, and spiro-fused pyrazole derivatives. These outstanding compounds synthesized via wide variety of approaches include conventional reactions, one-pot multi-component reactions, cyclocondensation, cascade/tandem protocols, and coupling reactions. 5-Amino-pyrazoles represent a class of promising functional reagents, similar to the biologically active compounds, highlighted with diverse applications especially in the field of pharmaceutics and medicinal chemistry. Notably, this critical review covers the articles published from 1981 to 2018.
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Affiliation(s)
- Ahmad Shaabani
- Faculty of Chemistry, Shahid Beheshti University, G. C., P. O. Box 19396-4716, Tehran, Iran.
| | - Mohammad Taghi Nazeri
- Faculty of Chemistry, Shahid Beheshti University, G. C., P. O. Box 19396-4716, Tehran, Iran
| | - Ronak Afshari
- Faculty of Chemistry, Shahid Beheshti University, G. C., P. O. Box 19396-4716, Tehran, Iran
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Govindaraju S, Tabassum S, Pasha MA. Silica iodide catalyzed, ultrasound-promoted, one-pot four-component synthesis of novel 1,4,5,6-tetrahydropyridine-3-carboxylate derivatives. PHOSPHORUS SULFUR 2017. [DOI: 10.1080/10426507.2016.1237948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Santhosh Govindaraju
- Department of Studies in Chemistry, Central College Campus, Bangalore University, Bangalore, India
| | - Sumaiya Tabassum
- Department of Studies in Chemistry, Central College Campus, Bangalore University, Bangalore, India
| | - Mohamed Afzal Pasha
- Department of Studies in Chemistry, Central College Campus, Bangalore University, Bangalore, India
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Cherukupalli S, Karpoormath R, Chandrasekaran B, Hampannavar GA, Thapliyal N, Palakollu VN. An insight on synthetic and medicinal aspects of pyrazolo[1,5-a]pyrimidine scaffold. Eur J Med Chem 2016; 126:298-352. [PMID: 27894044 DOI: 10.1016/j.ejmech.2016.11.019] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 10/19/2016] [Accepted: 11/08/2016] [Indexed: 11/26/2022]
Abstract
Pyrazolo[1,5-a]pyrimidine scaffold is one of the privileged hetrocycles in drug discovery. Its application as a buliding block for developing drug-like candidates has displayed broad range of medicinal properties such as anticancer, CNS agents, anti-infectious, anti-inflammatory, CRF1 antagonists and radio diagnostics. The structure-activity relationship (SAR) studies have acquired greater attention amid medicinal chemists, and many of the lead compounds were derived for various disease targets. However, there is plenty of room for the medicinal chemists to further exploit this privileged scaffold in developing potential drug candidates. The present review briefly outlines relevant synthetic strategies employed for pyrazolo[1,5-a]pyrimidine derivatives. It also extensively reveals significant biological properties along with SAR studies. To the best of our understanding current review is the first attempt made towards the compilation of significant advances made on pyrazolo[1,5-a]pyrimidines reported since 1980s.
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Affiliation(s)
- Srinivasulu Cherukupalli
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Rajshekhar Karpoormath
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa.
| | - Balakumar Chandrasekaran
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Girish A Hampannavar
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Neeta Thapliyal
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Venkata Narayana Palakollu
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
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15
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Synthesis and structure activity relationship investigation of triazolo[1,5-a]pyrimidines as CB2 cannabinoid receptor inverse agonists. Eur J Med Chem 2016; 113:11-27. [DOI: 10.1016/j.ejmech.2016.02.032] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/26/2016] [Accepted: 02/11/2016] [Indexed: 01/01/2023]
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16
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Aghazadeh Tabrizi M, Baraldi PG, Borea PA, Varani K. Medicinal Chemistry, Pharmacology, and Potential Therapeutic Benefits of Cannabinoid CB2 Receptor Agonists. Chem Rev 2016; 116:519-60. [PMID: 26741146 DOI: 10.1021/acs.chemrev.5b00411] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Mojgan Aghazadeh Tabrizi
- Department of Chemical and Pharmaceutical Sciences and ‡Department of Medical Science, Pharmacology Section, University of Ferrara , Ferrara 44121, Italy
| | - Pier Giovanni Baraldi
- Department of Chemical and Pharmaceutical Sciences and ‡Department of Medical Science, Pharmacology Section, University of Ferrara , Ferrara 44121, Italy
| | - Pier Andrea Borea
- Department of Chemical and Pharmaceutical Sciences and ‡Department of Medical Science, Pharmacology Section, University of Ferrara , Ferrara 44121, Italy
| | - Katia Varani
- Department of Chemical and Pharmaceutical Sciences and ‡Department of Medical Science, Pharmacology Section, University of Ferrara , Ferrara 44121, Italy
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Aghazadeh Tabrizi M, Baraldi PG, Ruggiero E, Saponaro G, Baraldi S, Romagnoli R, Martinelli A, Tuccinardi T. Pyrazole phenylcyclohexylcarbamates as inhibitors of human fatty acid amide hydrolases (FAAH). Eur J Med Chem 2015; 97:289-305. [DOI: 10.1016/j.ejmech.2015.04.064] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 04/27/2015] [Accepted: 04/30/2015] [Indexed: 10/23/2022]
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Ling X, Zhang S, Shao P, Li W, Yang L, Ding Y, Xu C, Stella N, Bai M. A novel near-infrared fluorescence imaging probe that preferentially binds to cannabinoid receptors CB2R over CB1R. Biomaterials 2015; 57:169-78. [PMID: 25916505 DOI: 10.1016/j.biomaterials.2015.04.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 04/04/2015] [Accepted: 04/08/2015] [Indexed: 10/23/2022]
Abstract
The type 2 cannabinoid receptors (CB2R) have gained much attention recently due to their important regulatory role in a host of pathophysiological processes. However, the exact biological function of CB2R and how this function might change depending on disease progression remains unclear and could be better studied with highly sensitive and selective imaging tools for identifying the receptors. Here we report the first near infrared fluorescence imaging probe (NIR760-XLP6) that binds preferentially to CB2R over the type 1 cannabinoid receptors (CB1R). The selectivity of the probe was demonstrated by fluorescence microscopy using DBT-CB2 and DBT-CB1 cells. Furthermore, in mouse tumor models, NIR760-XLP6 showed significantly higher uptake in DBT-CB2 than that in DBT-CB1 tumors. These findings indicate that NIR760-XLP6 is a promising imaging tool for the study of CB2R regulation.
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Affiliation(s)
- Xiaoxi Ling
- Department of Radiology, University of Pittsburgh, 100 Technology Drive, Pittsburgh, PA 15219, USA
| | - Shaojuan Zhang
- Department of Radiology, University of Pittsburgh, 100 Technology Drive, Pittsburgh, PA 15219, USA
| | - Pin Shao
- Department of Radiology, University of Pittsburgh, 100 Technology Drive, Pittsburgh, PA 15219, USA
| | - Weixia Li
- Department of Radiology, University of Pittsburgh, 100 Technology Drive, Pittsburgh, PA 15219, USA; Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Ling Yang
- Department of Radiology, University of Pittsburgh, 100 Technology Drive, Pittsburgh, PA 15219, USA; Cellular and Genetic Medicine Department, Basic Medical School, Fudan University, Shanghai 200032, China
| | - Ying Ding
- Department of Biostatistics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Cong Xu
- Department of Pharmacology, Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA 98195, USA
| | - Nephi Stella
- Department of Pharmacology, Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA 98195, USA
| | - Mingfeng Bai
- Department of Radiology, University of Pittsburgh, 100 Technology Drive, Pittsburgh, PA 15219, USA; University of Pittsburgh Cancer Institute, Pittsburgh, PA 15232, USA.
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Bertini S, Parkkari T, Savinainen JR, Arena C, Saccomanni G, Saguto S, Ligresti A, Allarà M, Bruno A, Marinelli L, Di Marzo V, Novellino E, Manera C, Macchia M. Synthesis, biological activity and molecular modeling of new biphenylic carboxamides as potent and selective CB2 receptor ligands. Eur J Med Chem 2015; 90:526-36. [DOI: 10.1016/j.ejmech.2014.11.066] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 07/24/2014] [Accepted: 11/30/2014] [Indexed: 12/12/2022]
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Reilly SW, Box HK, Kuchenbeiser GR, Rubio RJ, Letko CS, Cousineau KD, Hollis TK. 1,4-Addition of aryl boronic acids to α,β-unsaturated ketones catalyzed by a CCC–NHC pincer rhodium complex. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.09.107] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Feng Z, Alqarni MH, Yang P, Tong Q, Chowdhury A, Wang L, Xie XQ. Modeling, molecular dynamics simulation, and mutation validation for structure of cannabinoid receptor 2 based on known crystal structures of GPCRs. J Chem Inf Model 2014; 54:2483-99. [PMID: 25141027 PMCID: PMC4170816 DOI: 10.1021/ci5002718] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Indexed: 12/29/2022]
Abstract
The cannabinoid receptor 2 (CB2) plays an important role in the immune system. Although a few of GPCRs crystallographic structures have been reported, it is still challenging to obtain functional transmembrane proteins and high resolution X-ray crystal structures, such as for the CB2 receptor. In the present work, we used 10 reported crystal structures of GPCRs which had high sequence identities with CB2 to construct homology-based comparative CB2 models. We applied these 10 models to perform a prescreen by using a training set consisting of 20 CB2 active compounds and 980 compounds randomly selected from the National Cancer Institute (NCI) database. We then utilized the known 170 cannabinoid receptor 1 (CB1) or CB2 selective compounds for further validation. Based on the docking results, we selected one CB2 model (constructed by β1AR) that was most consistent with the known experimental data, revealing that the defined binding pocket in our CB2 model was well-correlated with the training and testing data studies. Importantly, we identified a potential allosteric binding pocket adjacent to the orthosteric ligand-binding site, which is similar to the reported allosteric pocket for sodium ion Na(+) in the A2AAR and the δ-opioid receptor. Our studies in correlation of our data with others suggested that sodium may reduce the binding affinities of endogenous agonists or its analogs to CB2. We performed a series of docking studies to compare the important residues in the binding pockets of CB2 with CB1, including antagonist, agonist, and our CB2 neutral compound (neutral antagonist) XIE35-1001. Then, we carried out 50 ns molecular dynamics (MD) simulations for the CB2 docked with SR144528 and CP55940, respectively. We found that the conformational changes of CB2 upon antagonist/agonist binding were congruent with recent reports of those for other GPCRs. Based on these results, we further examined one known residue, Val113(3.32), and predicted two new residues, Phe183 in ECL2 and Phe281(7.35), that were important for SR144528 and CP55940 binding to CB2. We then performed site-directed mutation experimental study for these residues and validated the predictions by radiometric binding affinity assay.
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Affiliation(s)
- Zhiwei Feng
- Department
of Pharmaceutical Sciences and Computational Chemical
Genomics Screening Center, School of Pharmacy, Computational Drug Abuse Research
Center, Drug Discovery Institute, and Department of Computational Biology and Department
of Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Mohammed Hamed Alqarni
- Department
of Pharmaceutical Sciences and Computational Chemical
Genomics Screening Center, School of Pharmacy, Computational Drug Abuse Research
Center, Drug Discovery Institute, and Department of Computational Biology and Department
of Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Peng Yang
- Department
of Pharmaceutical Sciences and Computational Chemical
Genomics Screening Center, School of Pharmacy, Computational Drug Abuse Research
Center, Drug Discovery Institute, and Department of Computational Biology and Department
of Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Qin Tong
- Department
of Pharmaceutical Sciences and Computational Chemical
Genomics Screening Center, School of Pharmacy, Computational Drug Abuse Research
Center, Drug Discovery Institute, and Department of Computational Biology and Department
of Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Ananda Chowdhury
- Department
of Pharmaceutical Sciences and Computational Chemical
Genomics Screening Center, School of Pharmacy, Computational Drug Abuse Research
Center, Drug Discovery Institute, and Department of Computational Biology and Department
of Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Lirong Wang
- Department
of Pharmaceutical Sciences and Computational Chemical
Genomics Screening Center, School of Pharmacy, Computational Drug Abuse Research
Center, Drug Discovery Institute, and Department of Computational Biology and Department
of Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Xiang-Qun Xie
- Department
of Pharmaceutical Sciences and Computational Chemical
Genomics Screening Center, School of Pharmacy, Computational Drug Abuse Research
Center, Drug Discovery Institute, and Department of Computational Biology and Department
of Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
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Alcaide B, Almendros P, Quirós MT. Gold/Acid-Co-catalyzed Direct Microwave-Assisted Synthesis of Fused Azaheterocycles from Propargylic Hydroperoxides. Chemistry 2014; 20:3384-93. [DOI: 10.1002/chem.201304509] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Indexed: 12/13/2022]
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