1
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Hao L, Wang Z, Wang Y, Yang Z, Liu X, Xu X, Ji Y. Synthesis of pyrazoles from sulfonyl hydrazone and benzyl acrylate under transition-metal-free conditions. Org Biomol Chem 2023; 21:7611-7615. [PMID: 37681741 DOI: 10.1039/d3ob01172k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Pyrazoles as an important class of heterocyclic compounds, are widely found in pharmaceuticals and bioactive natural products. Herein we report a [3 + 2] cycloaddition reaction for the synthesis of a series of pyrazoles, with the yield up to 77%. This approach exhibits many notable features, such as convenient operating conditions, excellent functional group compatibility and readily accessible raw materials, providing an alternative route for the construction of pyrazole derivatives.
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Affiliation(s)
- Liqiang Hao
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Zhichao Wang
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Yangyang Wang
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Zhaoziyuan Yang
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Xian Liu
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Xiaobo Xu
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Yafei Ji
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
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2
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Bhuyan P, Saikia L. Base promoted
CuFe
2
O
4
catalyzed one‐pot synthesis of 3,
5‐diaryl‐1
H
‐pyrazoles. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pubanita Bhuyan
- Department of Chemistry Rajiv Gandhi University Doimukh India
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3
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Aegurla B, Jarwal N, Peddinti RK. Denitrative imino-diaza-Nazarov cyclization: synthesis of pyrazoles. Org Biomol Chem 2020; 18:6100-6107. [PMID: 32785358 DOI: 10.1039/d0ob01200a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An iodine-catalyzed denitrative imino-diaza-Nazarov cyclization (DIDAN) methodology has been developed for the synthesis of pyrazoles with high to excellent yields by using α-nitroacetophenone derivatives and in situ generated hydrazones. The key transformation of this oxidative 4π-electrocyclization proceeds through an enamine-iminium ion intermediate. This rapid one-pot DIDAN protocol results in the selective generation of C-C and C-N bonds and cleavage of a C-N bond.
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Affiliation(s)
- Balakrishna Aegurla
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Nisha Jarwal
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Rama Krishna Peddinti
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
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4
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Grant PS, Kahlcke N, Govindpani K, Hunter M, MacDonald C, Brimble MA, Glass M, Furkert DP. Divalent cannabinoid-1 receptor ligands: A linker attachment point survey of SR141716A for development of high-affinity CB1R molecular probes. Bioorg Med Chem Lett 2019; 29:126644. [PMID: 31564385 DOI: 10.1016/j.bmcl.2019.126644] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 08/23/2019] [Accepted: 08/27/2019] [Indexed: 10/26/2022]
Abstract
The cannabinoid-1 receptor (CB1R) inverse agonist SR141716A has proven useful for study of the endocannabinoid system, including development of divalent CB1R ligands possessing a second functional motif attached via a linker unit. These have predominantly employed the C3 position of the central pyrazole ring for linker attachment. Despite this precedent, a novel series of C3-linked CB1R-D2R divalent ligands exhibited extremely high affinity at the D2R, but only poor affinity for the CB1R. A systematic linker attachment point survey of the SR141716A pharmacophore was therefore undertaken, establishing the C5 position as the optimal site for linker conjugation. This linker attachment survey enabled the identification of a novel divalent ligand as a lead compound to inform ongoing development of high-affinity CB1R molecular probes.
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Affiliation(s)
- Phillip S Grant
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Nils Kahlcke
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Karan Govindpani
- Department of Pharmacology & Clinical Pharmacology, University of Auckland, Auckland, New Zealand
| | - Morag Hunter
- Department of Pharmacology & Clinical Pharmacology, University of Auckland, Auckland, New Zealand
| | - Christa MacDonald
- Department of Pharmacology & Clinical Pharmacology, University of Auckland, Auckland, New Zealand
| | - Margaret A Brimble
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand; Maurice Wilkins Centre for Molecular Biodiscovery, New Zealand
| | - Michelle Glass
- Department of Pharmacology & Clinical Pharmacology, University of Auckland, Auckland, New Zealand; Maurice Wilkins Centre for Molecular Biodiscovery, New Zealand
| | - Daniel P Furkert
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand; Maurice Wilkins Centre for Molecular Biodiscovery, New Zealand.
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5
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Khan N, Halim SA, Khan W, Zafar SK, Ul-Haq Z. In-silico designing and characterization of binding modes of two novel inhibitors for CB1 receptor against obesity by classical 3D-QSAR approach. J Mol Graph Model 2019; 89:199-214. [PMID: 30908997 DOI: 10.1016/j.jmgm.2019.03.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 03/12/2019] [Accepted: 03/12/2019] [Indexed: 11/28/2022]
Abstract
Obesity is the fifth primary hazard for mortality in the world; hence different therapeutic targets are explored to overcome this problem. Endocannabinoid is identified as the emerging target for the treatment of obesity as Cannabinoid 1 (CB1) receptor over-activation resulted in abdominal obesity. Potent antagonists or inverse agonists for CB1 receptor are the new strategies to develop anti-obesity drugs. Here, ligand-based 3D-QSAR studies was performed on 100 analogues belonging to a class of 1,2,4-tirazole containing diarylpyrazolylcarboxamide as CB1 receptor antagonists. We developed three CoMFA models using different charge schemes, AM1BCC, Gasteiger-Huckle and MMFF. These models produced almost similar statistical results (q2cv = 0.725, 0.692, 0.719 and r2ncv = 0.929, 0.924, 0.928 for AM1BCC, Gasteiger-Huckle and MMFF, respectively). The said models were validated through 20 external test set compounds which resulted in significant r2pred values (r2pred = 0.747, 0.743 and 0.745 for AM1BCC, Gasteiger-Huckle and MMFF, respectively). Comparatively, AM1BCC model provided slightly better statistics among all three tested charges scheme models, hence AM1BCC model was further utilized to generate CoMSIA models considering different field combinations. The best selected CoMSIA model also produced substantial q2cv = 0.788, r2ncv = 0.916 and r2pred = 0.836 values. Furthermore, two new molecules were designed by modifying the same scaffolds on the basis contour map analysis. The activities of newly designed molecules were predicted through obtained CoMFA model ranked as better than their parent molecules. Moreover, these newly designed compounds were successfully docked on the complex crystal structure of CB1 receptor (PDB ID: 5XRA). The docked conformation of these newly designed inhibitor interacted with Ser173, His178, Lys192, Thr197 and Ser383 mainly by hydrophobic and pi-pi stacking interactions. The obtained results signify the potential of the developed model; suggesting that the models can be useful to test and design potent novel CB1 receptor antagonists or inverse agonists prior to the synthesis.
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Affiliation(s)
- Naveed Khan
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Sobia Ahsan Halim
- Natural and Medical Sciences Research Center, University of Nizwa, Nizwa, 616, Oman
| | - Waqasuddin Khan
- Jamil-ur-Rahman Center for Genome Research, Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Syed Kashif Zafar
- Department of Chemistry, University of Karachi, Karachi, 75270, Pakistan
| | - Zaheer Ul-Haq
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan.
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6
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Nagaraju B, Kovvuri J, Kumar CG, Routhu SR, Shareef MA, Kadagathur M, Adiyala PR, Alavala S, Nagesh N, Kamal A. Synthesis and biological evaluation of pyrazole linked benzothiazole-β-naphthol derivatives as topoisomerase I inhibitors with DNA binding ability. Bioorg Med Chem 2019; 27:708-720. [PMID: 30679134 DOI: 10.1016/j.bmc.2019.01.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 01/10/2019] [Accepted: 01/13/2019] [Indexed: 11/17/2022]
Abstract
A series of new pyrazole linked benzothiazole-β-naphthol derivatives were designed and synthesized using a simple, efficient and ecofriendly route under catalyst-free conditions in good to excellent yields. These derivatives were evaluated for their cytotoxicity on selected human cancer cell lines. Among those, the derivatives 4j, 4k and 4l exhibited considerable cytotoxicity with IC50 values ranging between 4.63 and 5.54 µM against human cervical cancer cells (HeLa). Structure activity relationship was elucidated by varying different substituents on benzothiazoles and pyrazoles. Further, flow cytometric analysis revealed that these derivatives induced cell cycle arrest in G2/M phase and spectroscopic studies such as UV-visible, fluorescence and circular dichroism studies showed that these derivatives exhibited good DNA binding affinity. Additionally, these derivatives can effectively inhibit the topoisomerase I activity. Viscosity studies and molecular docking studies demonstrated that the derivatives bind with the minor groove of the DNA.
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Affiliation(s)
- Burri Nagaraju
- Medicinal Chemistry and Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
| | - Jeshma Kovvuri
- Medicinal Chemistry and Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
| | - C Ganesh Kumar
- Medicinal Chemistry and Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India.
| | - Sunitha Rani Routhu
- Medicinal Chemistry and Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
| | - Md Adil Shareef
- Medicinal Chemistry and Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
| | - Manasa Kadagathur
- Medicinal Chemistry and Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
| | - Praveen Reddy Adiyala
- Medicinal Chemistry and Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
| | - Sateesh Alavala
- Medicinal Chemistry and Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
| | - Narayana Nagesh
- CSIR-Centre for Cellular and Molecular Biology, Hyderabad 500007, Telangana, India.
| | - Ahmed Kamal
- Medicinal Chemistry and Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India; School of Pharmaceutical Education and Research, (SPER) Jamia Hamdard, New Delhi 110062, India.
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7
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Zhao WQ, Qian K, Su CW, Shao L, Zhou W, Cui DM, Zhang C, Wang XL. Copper-catalyzed synthesis of pyrazolo[5,1-a]isoquinoline derivatives from 2-gem-dipyrazolylvinylbromobenzenes. NEW J CHEM 2019. [DOI: 10.1039/c9nj01882d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient copper-catalyzed synthesis of pyrazolo[5,1-a]isoquinolines from 2-gem-dipyrazolylvinylbromobenzenes under mild conditions has been developed.
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Affiliation(s)
- Wan Qiu Zhao
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Kun Qian
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Cheng Wu Su
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Lei Shao
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Wei Zhou
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Dong-Mei Cui
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Chen Zhang
- School of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- China
| | - Xiu-Li Wang
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541006
- China
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8
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Hasan P, Pillalamarri VK, Aneja B, Irfan M, Azam M, Perwez A, Maguire R, Yadava U, Kavanagh K, Daniliuc CG, Ahmad MB, Rizvi MMA, Rizwanul Haq QM, Addlagatta A, Abid M. Synthesis and mechanistic studies of diketo acids and their bioisosteres as potential antibacterial agents. Eur J Med Chem 2018; 163:67-82. [PMID: 30503944 DOI: 10.1016/j.ejmech.2018.11.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 10/13/2018] [Accepted: 11/21/2018] [Indexed: 11/16/2022]
Abstract
A series of diketo esters and their pertinent bioisosteres were designed and synthesized as potent antibacterial agents by targeting methionine amino peptidases (MetAPs). In the biochemical assay against purified MetAPs from Streptococcus pneumoniae (SpMetAP1a), Mycobacterium tuberculosis (MtMetAP1c), Enterococcus faecalis (EfMetAP1a) and human (HsMetAP1b), compounds 3a, 4a and 5a showed more than 85% inhibition of all the tested MetAPs at 100 μM concentration. Compounds 4a and 5a also exhibited antibacterial potential with MIC values 62.5 μg/mL (S. pneumoniae), 31.25 μg/mL (E. faecalis), 62.5 μg/mL (Escherichia coli) and 62.5 μg/mL (S. pneumoniae), 62.5 μg/mL (E. coli), respectively. Moreover, 5a also significantly inhibited the growth of multidrug resistant E. coli strains at 512 μg/mL conc., while showing no cytotoxic effect towards healthy CHO cells and thus being selected. Growth kinetics study showed significant inhibition of bacterial growth when treated with different conc. of 5a. TEM analysis also displayed vital damage to bacterial cells by 5a at MIC conc. Moreover, significant inhibition of biofilm formation was observed in bacterial cells treated with MIC conc. of 5a as visualized by SEM micrographs. Interestingly, 5a did not cause an alteration in the hemocyte density in Galleria mellonella larvae which is considered in vivo model for antimicrobial studies and was non-toxic up to a conc. of 2.5 mg/mL.
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Affiliation(s)
- Phool Hasan
- Medicinal Chemistry Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India; Department of Chemistry, TNB College, TM Bhagalpur University, Bhagalpur, 812007, India
| | - Vijay K Pillalamarri
- Centre for Chemical Biology, Indian Institute of Chemical Technology, Tarnaka, Hyderabad, 500607, India
| | - Babita Aneja
- Medicinal Chemistry Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Mohammad Irfan
- Medicinal Chemistry Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Mudsser Azam
- Microbiology Research Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Ahmad Perwez
- Genome Biology Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Ronan Maguire
- Department of Biology, Maynooth University, Co. Kildare, W23 F2H6, Ireland
| | - Umesh Yadava
- Department of Physics, Deen Dayal Upadhyay Gorakhpur University, Gorakhpur, Uttar Pradesh, 273009, India
| | - Kevin Kavanagh
- Department of Biology, Maynooth University, Co. Kildare, W23 F2H6, Ireland
| | | | - Md Belal Ahmad
- Department of Chemistry, TNB College, TM Bhagalpur University, Bhagalpur, 812007, India
| | - M Moshahid A Rizvi
- Genome Biology Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Qazi Mohd Rizwanul Haq
- Microbiology Research Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Anthony Addlagatta
- Centre for Chemical Biology, Indian Institute of Chemical Technology, Tarnaka, Hyderabad, 500607, India
| | - Mohammad Abid
- Medicinal Chemistry Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India.
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9
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Liu C, Yuan C, Wu P, Zhu C, Fang H, Wang L, Fu W. Computational investigation on the binding modes of Rimonabant analogs with CB1 and CB2. Chem Biol Drug Des 2018; 92:1699-1707. [PMID: 29797785 DOI: 10.1111/cbdd.13337] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 04/22/2018] [Accepted: 04/26/2018] [Indexed: 12/30/2022]
Affiliation(s)
- Cheng Liu
- Department of Medicinal Chemistry and Key Laboratory of Smart Drug Delivery; Ministry of Education; School of Pharmacy; Fudan University; Shanghai China
| | - Congmin Yuan
- Department of Medicinal Chemistry and Key Laboratory of Smart Drug Delivery; Ministry of Education; School of Pharmacy; Fudan University; Shanghai China
| | - Pinwen Wu
- Department of Anesthesiology; Minhang Branch; Zhongshan Hospital; Fudan University; Shanghai China
| | - Chen Zhu
- Department of Medicinal Chemistry and Key Laboratory of Smart Drug Delivery; Ministry of Education; School of Pharmacy; Fudan University; Shanghai China
| | - Hao Fang
- Department of Anesthesiology; Minhang Branch; Zhongshan Hospital; Fudan University; Shanghai China
- Department of Anesthesiology; Zhongshan Hospital Affiliated Fudan University; Shanghai China
| | - Lili Wang
- Beijing Institute of Pharmacology and Toxicology and State Key Laboratory of Toxicology and Medical Countermeasures; Beijing China
| | - Wei Fu
- Department of Medicinal Chemistry and Key Laboratory of Smart Drug Delivery; Ministry of Education; School of Pharmacy; Fudan University; Shanghai China
- Department of Anesthesiology; Minhang Branch; Zhongshan Hospital; Fudan University; Shanghai China
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10
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Synthesis, Crystal Structure, and Supramolecular Understanding of 1,3,5-Tris(1-phenyl-1H-pyrazol-5-yl)benzenes. Molecules 2017; 23:molecules23010022. [PMID: 29271950 PMCID: PMC5943957 DOI: 10.3390/molecules23010022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 12/18/2017] [Accepted: 12/19/2017] [Indexed: 12/03/2022] Open
Abstract
Understanding the supramolecular environment of crystal structures is necessary to facilitate designing molecules with desirable properties. A series of 12 novel 1,3,5-tris(1-phenyl-1H-pyrazol-5-yl)benzenes was used to assess the existence of planar stacking columns in supramolecular structures of pyrazoles. This class of molecules with different substituents may assist in understanding how small structural changes affect the supramolecular environment. The obtained compounds did not present the formation of planar stacking interactions between benzenes in solid or liquid states. This supposition was indicated by single crystal diffraction, Density Functional Theory (DFT) and quantum theory of atoms in molecules (QTAIM) calculations, and concentration-dependent liquid-state 1H nuclear magnetic resonance (NMR). NMR showed that chemical shifts of benzene and pyrazole hydrogens confirm that planar stacking interactions are not formed in solution. The crystalline structures presented different molecular conformations. The molecular structures of 5 and 9b are in a twisted conformation, while compound 7 showed a conformation analogous to a calyx form.
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11
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Chang CC, Chen CY, Wen HC, Huang CY, Hung MS, Lu HC, Chen WL, Chang CH. Caveolin-1 Secreted from Adipose Tissues and Adipocytes Functions as an Adipogenesis Enhancer. Obesity (Silver Spring) 2017; 25:1932-1940. [PMID: 28944626 DOI: 10.1002/oby.21970] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 07/11/2017] [Accepted: 07/24/2017] [Indexed: 01/08/2023]
Abstract
OBJECTIVE Caveolin-1 (Cav-1) is expressed abundantly in adipose tissue and involved in many physiological processes. While Cav-1 has been reported to be secreted in pancreatic acinar cells and LNCaP prostate cancer cells, its secretion from adipose tissue awaits investigation. METHODS Cav-1 secretion from 3T3-L1 adipocytes and fat tissues from normal chow diet- and high-fat diet (HFD)-fed mice was measured. Functions and uptake of secreted Cav-1 proteins were assessed by adding Cav-1 back to preadipocytes and LNCaP cells. RESULTS Cav-1 secretion was evident in adipose tissues and were substantially promoted in HFD-fed mice. Cav-1 was detectable in the conditioned media of 3T3-L1 adipocytes but not preadipocytes. Hypertrophied adipocytes induced by glucose and fatty acids secreted more Cav-1, suggesting that hypertrophied adipocytes were responsible for enhanced Cav-1 secretion in obese mice. Secreted Cav-1 was taken up by preadipocytes and LNCaP cells. 3T3-L1 preadipocytes overexpressing Cav-1 were better differentiated, suggesting that secreted Cav-1 may promote adipogenesis. Hypertrophied 3T3-L1 adipocytes enhanced ERK1/2 activation, and the attenuation of ERK1/2 activity by PD98059 inhibited Cav-1 secretion. CONCLUSIONS Cav-1 is actively secreted from adipocytes as a putative adipogenesis enhancer. Hypertrophied adipocytes secrete Cav-1 via ERK1/2-dependent mechanisms to promote adipogenesis, thus establishing a vicious cycle.
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Affiliation(s)
- Chia-Chu Chang
- PhD Program for Aging, China Medical University, Taichung, Taiwan, Republic of China
- School of Medicine, Chung Shan Medical University, Taichung, Taiwan, Republic of China
- Environmental and Precision Medicine Laboratory, Department of Internal Medicine, Changhua Christian Hospital, Changhua, Taiwan, Republic of China
| | - Chen-Yu Chen
- Institute of Cellular and System Medicine, National Health Research Institutes, Zhunan, Miaoli, Taiwan, Republic of China
| | - Hui-Chin Wen
- Institute of Cellular and System Medicine, National Health Research Institutes, Zhunan, Miaoli, Taiwan, Republic of China
| | - Chih-Yang Huang
- PhD Program for Aging, China Medical University, Taichung, Taiwan, Republic of China
| | - Ming-Shiu Hung
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli, Taiwan, Republic of China
| | - Hsi-Chi Lu
- Department of Food Science, Tunghai University, Taichung, Taiwan, Republic of China
| | - Woan-Ling Chen
- Environmental and Precision Medicine Laboratory, Department of Internal Medicine, Changhua Christian Hospital, Changhua, Taiwan, Republic of China
- Department of Food Science, Tunghai University, Taichung, Taiwan, Republic of China
| | - Chung-Ho Chang
- PhD Program for Aging, China Medical University, Taichung, Taiwan, Republic of China
- Environmental and Precision Medicine Laboratory, Department of Internal Medicine, Changhua Christian Hospital, Changhua, Taiwan, Republic of China
- Institute of Cellular and System Medicine, National Health Research Institutes, Zhunan, Miaoli, Taiwan, Republic of China
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12
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13
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Aegurla B, Peddinti RK. The diaza-Nazarov cyclization involving a 2,3-diaza-pentadienyl cation for the synthesis of polysubstituted pyrazoles. Org Biomol Chem 2017; 15:9643-9652. [DOI: 10.1039/c7ob01949a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Functionally-rich pyrazoles in a cascade reaction from in situ generated hydrazones and acetophenones under aerobic conditions were synthesized through novel enamine–imino diaza-Nazarov 4π-electrocyclization which is supported by DFT calculations.
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14
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Li RH, Ding CK, Jiang YN, Ding ZC, An XM, Tang HT, Jing QW, Zhan ZP. Synthesis of 5,6-Dihydropyrazolo[5,1-a]isoquinolines through Indium(III)-Promoted Halocyclizations of N-Propargylic Sulfonylhydrazones. Org Lett 2016; 18:1666-9. [DOI: 10.1021/acs.orglett.6b00534] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ren-Hao Li
- Department
of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China
| | - Cheng-Ke Ding
- Department
of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China
| | - Ya-Nan Jiang
- Department
of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China
| | - Zong-Cang Ding
- Department
of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China
| | - Xiao-Ming An
- Department
of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China
| | - Hai-Tao Tang
- Department
of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China
| | - Qi-Wei Jing
- Department
of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China
| | - Zhuang-Ping Zhan
- Department
of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China
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15
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Modulation of food consumption and sleep-wake cycle in mice by the neutral CB1 antagonist ABD459. Behav Pharmacol 2015; 26:289-303. [PMID: 25356730 DOI: 10.1097/fbp.0000000000000108] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The brain endocannabinoid system is a potential target for the treatment of psychiatric and metabolic conditions. Here, a novel CB1 receptor antagonist (ABD459) was synthesized and assayed for pharmacological efficacy in vitro and for modulation of food consumption, vigilance staging and cortical electroencephalography in the mouse. ABD459 completely displaced the CB1 agonist CP99540 at a Ki of 8.6 nmol/l, and did not affect basal, but antagonized CP55940-induced GTPγS binding with a KB of 7.7 nmol/l. Acute ABD459 (3-20 mg/kg) reliably inhibited food consumption in nonfasted mice, without affecting motor activity. Active food seeking was reduced for 5-6 h postdrug, with no rebound after washout. Epidural recording of electroencephalogram confirmed that ABD459 (3 mg/kg) robustly reduced rapid eye movement (REM) sleep, with no alterations of wakefulness or non-REM sleep. Effects were strongest during 3 h postdrug, followed by a progressive washout period. The CB1 antagonist AM251 (3 mg/kg) and agonist WIN-55,212-2 (WIN-2: 3 mg/kg) also reduced REM, but variously affected other vigilance stages. WIN-2 caused a global suppression of normalized spectral power. AM251 and ABD459 lowered delta power and increased power in the theta band in the hippocampus, but not the prefrontal cortex. The neutral antagonist ABD459 thus showed a specific role of endocannabinoid release in attention and arousal, possibly through modulation of cholinergic activity.
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16
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Oliveira DH, Aquino TB, Nascimento JER, Perin G, Jacob RG, Alves D. Direct Synthesis of 4-Organylselanylpyrazoles by Copper- Catalyzed One-Pot Cyclocondensation and CH Bond Selenylation Reactions. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500625] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Vanjari R, Guntreddi T, Kumar S, Singh KN. Sulphur promoted C(sp3)–C(sp2) cross dehydrogenative cyclisation of acetophenone hydrazones with aldehydes: efficient synthesis of 3,4,5-trisubstituted 1H-pyrazoles. Chem Commun (Camb) 2015; 51:366-9. [DOI: 10.1039/c4cc08210a] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The first-time sulfur-promoted CDC approach involving acetophenone hydrazones and aldehydes has been developed for the synthesis of substituted pyrazoles.
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Affiliation(s)
- Rajeshwer Vanjari
- Department of Chemistry (Centre of Advanced Study)
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005
- India
| | - Tirumaleswararao Guntreddi
- Department of Chemistry (Centre of Advanced Study)
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005
- India
| | - Saurabh Kumar
- Department of Chemistry (Centre of Advanced Study)
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005
- India
| | - Krishna Nand Singh
- Department of Chemistry (Centre of Advanced Study)
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005
- India
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18
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Tang HT, Xiong K, Li RH, Ding ZC, Zhan ZP. Synthesis of 5,6-Dihydropyrazolo[1,5-c]quinazolines through Gold-Catalyzed Chemoselective Bicyclization of N-Propargylic Sulfonylhydrazones. Org Lett 2014; 17:326-9. [PMID: 25544196 DOI: 10.1021/ol503437n] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Hai-Tao Tang
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, People’s Republic of China
| | - Kai Xiong
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, People’s Republic of China
| | - Ren-Hao Li
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, People’s Republic of China
| | - Zong-Cang Ding
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, People’s Republic of China
| | - Zhuang-Ping Zhan
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, People’s Republic of China
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19
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2-Butyl-4-chloroimidazole based substituted piperazine-thiosemicarbazone hybrids as potent inhibitors of Mycobacterium tuberculosis. Bioorg Med Chem Lett 2014; 24:5520-4. [DOI: 10.1016/j.bmcl.2014.09.084] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 09/25/2014] [Accepted: 09/27/2014] [Indexed: 11/22/2022]
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20
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Prospective therapeutic agents for obesity: Molecular modification approaches of centrally and peripherally acting selective cannabinoid 1 receptor antagonists. Eur J Med Chem 2014; 79:298-339. [DOI: 10.1016/j.ejmech.2014.04.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 04/03/2014] [Accepted: 04/04/2014] [Indexed: 01/29/2023]
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21
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Gu C, Zhai J, Jiang J, Liu H, Wang L, Zhu D, Ji Y. An Efficient One-pot Synthesis of Aryl-substituted 1-(Thiazol-2-yl)-1H-pyrazole-3-carboxylates via a Hantzsch Synthesis-Knorr Reaction Sequence. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201300878] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Harigae R, Moriyama K, Togo H. Preparation of 3,5-disubstituted pyrazoles and isoxazoles from terminal alkynes, aldehydes, hydrazines, and hydroxylamine. J Org Chem 2014; 79:2049-58. [PMID: 24512630 DOI: 10.1021/jo4027116] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The reaction of terminal alkynes with n-BuLi, and then with aldehydes, followed by the treatment with molecular iodine, and subsequently hydrazines or hydroxylamine provided the corresponding 3,5-disubstituted pyrazoles or isoxazoles in good yields with high regioselectivity, through the formations of propargyl secondary alkoxides and α-alkynyl ketones. The present reactions are one-pot preparation of 3,5-disubstituted pyrazoles from terminal alkynes, aldehydes, molecular iodine, and hydrazines, and 3,5-disubstituted isoxazoles from terminal alkynes, aldehydes, molecular iodine, and hydroxylamine.
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Affiliation(s)
- Ryo Harigae
- Graduate School of Science, Chiba University , Yayoi-cho 1-33, Inage-ku, Chiba 263-8522, Japan
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23
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Liu H, Patel RY, Doerksen RJ. Structure of the cannabinoid receptor 1: homology modeling of its inactive state and enrichment study based on CB1 antagonist docking. MEDCHEMCOMM 2014. [DOI: 10.1039/c4md00121d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multiple cannabinoid 1 receptor models were prepared and the best one was selected based on the models' performance in selecting known ligands from a pool of competitors.
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Affiliation(s)
- Haining Liu
- Department of Medicinal Chemistry
- School of Pharmacy
- University of Mississippi
- University, USA
| | - Ronak Y. Patel
- Department of Medicinal Chemistry
- School of Pharmacy
- University of Mississippi
- University, USA
| | - Robert J. Doerksen
- Department of Medicinal Chemistry
- School of Pharmacy
- University of Mississippi
- University, USA
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24
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Chang CP, Wu CH, Song JS, Chou MC, Wong YC, Lin Y, Yeh TK, Sadani AA, Ou MH, Chen KH, Chen PH, Kuo PC, Tseng CT, Chang KH, Tseng SL, Chao YS, Hung MS, Shia KS. Discovery of 1-(2,4-dichlorophenyl)-N-(piperidin-1-yl)-4-((pyrrolidine-1-sulfonamido)methyl)-5-(5-((4-(trifluoromethyl)phenyl)ethynyl)thiophene-2-yl)-1H-pyrazole-3-carboxamide as a novel peripherally restricted cannabinoid-1 receptor antagonist with significant weight-loss efficacy in diet-induced obese mice. J Med Chem 2013; 56:9920-33. [PMID: 24224693 DOI: 10.1021/jm401158e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
After extensive synthetic efforts, we found that many structurally diverse bioisosteres could be generated via derivatizing the C-4 alkyl chain on the pyrazole ring of compound 3 (B/P = 1/33) with different electronegative groups. Especially when a sulfonamide or sulfamide moiety was added, resulting compounds exhibited not only potent CB1R activity but also a desired tPSA value over 90 Å(2), a threshold considered to possess a low probability to cross BBB, leading to the identification of compound 4 (B/P = 1/64) as a peripherally restricted CB1R antagonist. Apart from its significant weight-loss efficacy in DIO mice, compound 4 also displays 163 clean off-target profiles and is currently under development for treating obesity and the related metabolic syndrome.
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Affiliation(s)
- Chun-Ping Chang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli County 35053, Taiwan, R.O.C
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25
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Dhopeshwarkar AS, Nicholson RA. Benzophenanthridine alkaloid, piperonyl butoxide and (S)-methoprene action at the cannabinoid-1 receptor (CB1-receptor) pathway of mouse brain: Interference with [(3)H]CP55940 and [(3)H]SR141716A binding and modification of WIN55212-2-dependent inhibition of synaptosomal l-glutamate release. Eur J Pharmacol 2013; 723:431-41. [PMID: 24211785 DOI: 10.1016/j.ejphar.2013.10.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Revised: 10/21/2013] [Accepted: 10/31/2013] [Indexed: 11/24/2022]
Abstract
Benzophenanthridine alkaloids (chelerythrine and sanguinarine) inhibited binding of [(3)H]SR141716A to mouse brain membranes (IC50s: <1µM). Piperonyl butoxide and (S)-methoprene were less potent (IC50s: 21 and 63µM respectively). Benzophenanthridines and piperonyl butoxide were more selective towards brain CB1 receptors versus spleen CB2 receptors. All compounds reduced Bmax of [(3)H]SR141716A binding to CB1 receptors, but only methoprene and piperonyl butoxide increased Kd (3-5-fold). Benzophenanthridines increased the Kd of [(3)H]CP55940 binding (6-fold), but did not alter Bmax. (S)-methoprene increased the Kd of [(3)H]CP55940 binding (by almost 4-fold) and reduced Bmax by 60%. Piperonyl butoxide lowered the Bmax of [(3)H]CP55940 binding by 50%, but did not influence Kd. All compounds reduced [(3)H]SR141716A and [(3)H]CP55940 association with CB1 receptors. Combined with a saturating concentration of SR141716A, only piperonyl butoxide and (S)-methoprene increased dissociation of [(3)H]SR141716A above that of SR141716A alone. Only piperonyl butoxide increased dissociation of [(3)H]CP55940 to a level greater than CP55940 alone. Binding results indicate predominantly allosteric components to the study compounds action. 4-Aminopyridine-(4-AP-) evoked release of l-glutamate from synaptosomes was partially inhibited by WIN55212-2, an effect completely neutralized by AM251, (S)-methoprene and piperonyl butoxide. With WIN55212-2 present, benzophenanthridines enhanced 4-AP-evoked l-glutamate release above 4-AP alone. Modulatory patterns of l-glutamate release (with WIN-55212-2 present) align with previous antagonist/inverse agonist profiling based on [(35)S]GTPγS binding. Although these compounds exhibit lower potencies compared to many classical CB1 receptor inhibitors, they may have potential to modify CB1-receptor-dependent behavioral/physiological outcomes in the whole animal.
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Affiliation(s)
- Amey Sadashiv Dhopeshwarkar
- Simon Fraser University, Department of Biological Sciences, 8888 University drive, Burnaby, BC, Canada V5A 1S6.
| | - Russell Alfred Nicholson
- Simon Fraser University, Department of Biological Sciences, 8888 University drive, Burnaby, BC, Canada V5A 1S6.
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26
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Zhu Y, Lu WT, Sun HC, Zhan ZP. Lewis Base Catalyzed Synthesis of Multisubstituted 4-Sulfonyl-1H-Pyrazole Involving a Novel 1,3-Sulfonyl Shift. Org Lett 2013; 15:4146-9. [DOI: 10.1021/ol401818m] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yu Zhu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Wen-Ting Lu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Hong-Chao Sun
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Zhuang-Ping Zhan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
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27
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Zhang L, Peng XM, Damu GLV, Geng RX, Zhou CH. Comprehensive review in current developments of imidazole-based medicinal chemistry. Med Res Rev 2013; 34:340-437. [PMID: 23740514 DOI: 10.1002/med.21290] [Citation(s) in RCA: 473] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Imidazole ring is an important five-membered aromatic heterocycle widely present in natural products and synthetic molecules. The unique structural feature of imidazole ring with desirable electron-rich characteristic is beneficial for imidazole derivatives to readily bind with a variety of enzymes and receptors in biological systems through diverse weak interactions, thereby exhibiting broad bioactivities. The related research and developments of imidazole-based medicinal chemistry have become a rapidly developing and increasingly active topic. Particularly, numerous imidazole-based compounds as clinical drugs have been extensively used in the clinic to treat various types of diseases with high therapeutic potency, which have shown the enormous development value. This work systematically gives a comprehensive review in current developments of imidazole-based compounds in the whole range of medicinal chemistry as anticancer, antifungal, antibacterial, antitubercular, anti-inflammatory, antineuropathic, antihypertensive, antihistaminic, antiparasitic, antiobesity, antiviral, and other medicinal agents, together with their potential applications in diagnostics and pathology. It is hoped that this review will be helpful for new thoughts in the quest for rational designs of more active and less toxic imidazole-based medicinal drugs, as well as more effective diagnostic agents and pathologic probes.
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Affiliation(s)
- Ling Zhang
- Laboratory of Bioorganic & Medicinal Chemistry, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China
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28
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Manca I, Mastinu A, Olimpieri F, Falzoi M, Sani M, Ruiu S, Loriga G, Volonterio A, Tambaro S, Bottazzi MEH, Zanda M, Pinna GA, Lazzari P. Novel pyrazole derivatives as neutral CB 1 antagonists with significant activity towards food intake. Eur J Med Chem 2013; 62:256-69. [DOI: 10.1016/j.ejmech.2012.12.056] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 12/21/2012] [Accepted: 12/25/2012] [Indexed: 10/27/2022]
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29
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A Simple and Efficient Synthesis of Ethyl 1-Aryl-4-formyl-1H-pyrazole-3-carboxylates. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Xu HW, Fan W, Li MY, Jiang B, Wang SL, Tu SJ. A novel domino strategy for forming poly-substituted quaternary imidazoles through a Cs2CO3-promoted aryl migration process. Org Biomol Chem 2013; 11:3603-7. [DOI: 10.1039/c3ob40666k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Jiang JA, Huang WB, Zhai JJ, Liu HW, Cai Q, Xu LX, Wang W, Ji YF. ‘One-pot’ synthesis of 4-substituted 1,5-diaryl-1H-pyrazole-3-carboxylates via lithium tert-butoxide-mediated sterically hindered Claisen condensation and Knorr reaction. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.11.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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32
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Fang Z, Yang Z, Xu JF, Guo K, Wei P. A Novel and Practical Synthesis of Rimonabant Hydrochloride. ORG PREP PROCED INT 2012. [DOI: 10.1080/00304948.2012.657564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Zheng Fang
- a School of Pharmaceutical Science , Nanjing University of Technology , Nanjing , 210009 , P. R. China
| | - Zhao Yang
- b College of Pharmacy , China Pharmaceutical University , Nanjing , 210009 , P. R. China
| | - Jia-Feng Xu
- a School of Pharmaceutical Science , Nanjing University of Technology , Nanjing , 210009 , P. R. China
| | - Kai Guo
- a School of Pharmaceutical Science , Nanjing University of Technology , Nanjing , 210009 , P. R. China
| | - Ping Wei
- a School of Pharmaceutical Science , Nanjing University of Technology , Nanjing , 210009 , P. R. China
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33
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34
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Zora M, Kivrak A. Synthesis of Pyrazoles via CuI-Mediated Electrophilic Cyclizations of α,β-Alkynic Hydrazones. J Org Chem 2011; 76:9379-90. [DOI: 10.1021/jo201685p] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Metin Zora
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
| | - Arif Kivrak
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
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35
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Sasmal PK, Talwar R, Swetha J, Balasubrahmanyam D, Venkatesham B, Rawoof KA, Neelima Devi B, Jadhav VP, Khan SK, Mohan P, Srinivasa Reddy D, Nyavanandi VK, Nanduri S, Kyasa SK, Kannan M, Srinivas P, Nadipalli P, Chaudhury H, Sebastian VJ. Structure-activity relationship studies of novel pyrazole and imidazole carboxamides as cannabinoid-1 (CB1) antagonists. Bioorg Med Chem Lett 2011; 21:4913-8. [PMID: 21741835 DOI: 10.1016/j.bmcl.2011.06.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 05/27/2011] [Accepted: 06/06/2011] [Indexed: 11/28/2022]
Abstract
The synthesis and biological evaluation of novel pyrazole and imidazole carboxamides as CB1 antagonists are described. As a part of eastern amide SAR, various chemically diverse motifs were introduced on rimonabant template. The central pyrazole core was also replaced with its conformationally constrained motif and imidazole moieties. In general, a range of modifications were well tolerated. Several molecules with low- and sub-nanomolar potencies were identified as potent CB1 receptor antagonists. The in vivo proof of principle for weight loss is demonstrated with a lead compound in DIO mice model.
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Affiliation(s)
- Pradip K Sasmal
- Discovery Research, Dr. Reddy's Laboratories Ltd, Bollaram Road, Miyapur, Hyderabad 500049, India.
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36
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Zora M, Kivrak A, Yazici C. Synthesis of Pyrazoles via Electrophilic Cyclization. J Org Chem 2011; 76:6726-42. [DOI: 10.1021/jo201119e] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Metin Zora
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
| | - Arif Kivrak
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
| | - Ceyda Yazici
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
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37
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The actions of benzophenanthridine alkaloids, piperonyl butoxide and (S)-methoprene at the G-protein coupled cannabinoid CB1 receptor in vitro. Eur J Pharmacol 2011; 654:26-32. [DOI: 10.1016/j.ejphar.2010.11.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2010] [Revised: 09/30/2010] [Accepted: 11/26/2010] [Indexed: 01/25/2023]
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38
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Pan C, Yoo HJ, Ho LT. Perspectives of CB1 Antagonist in Treatment of Obesity: Experience of RIO-Asia. J Obes 2011; 2011:957268. [PMID: 21253513 PMCID: PMC3021887 DOI: 10.1155/2011/957268] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Accepted: 11/09/2010] [Indexed: 02/05/2023] Open
Abstract
Rimonabant, a selective cannabinoid-1 (CB1) receptor antagonist, has been shown to reduce weight and enhance improvements in cardiometabolic risk parameters in Western populations. This study assessed these effects of rimonabant in Asian population. A total of 643 patients (BMI 25 kg/m(2) or greater without diabetes) from China, Republic of Korea, and Taiwan were prescribed a hypocaloric diet (600 kcal/day deficit) and randomized to rimonabant 20 mg (n = 318) or placebo (n = 325) for 9months. The primary efficacy variable was weight change from baseline after 9 months of treatment. Results showed that rimonabant group lost more weight than placebo, (LSM ± SEM of -4.7 ± 0.3 kg vs. -1.7 ± 0.3 kg, P < .0001). The 5% and 10% responders were 2 or 3 folds more in the rimonabant group (53.0% vs. 20.0% and 21.5% vs. 5.7%, resp.) (P < .0001). Rimonabant also significantly increased HDL-cholesterol, decreased triglycerides and waist circumference,by 7.1%, 10.6%, and 2.8 cm, respectively (P < .0001). This study confirmed the comparable efficacy and safety profile of rimonabant in Asian population to Caucasians. Owing to the recent suspension of all the CB1 antagonists off the pharmaceutical market for weight reduction in Europe and USA, a perspective in drug discovery for intervening peripheral CB1 receptor in the management of obesity is discussed.
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Affiliation(s)
- Changyu Pan
- Department of Endocrinology, Chinese PLA, General Hospital, No. 28, Fuxing Road, Beijing 100853, China
| | - Hyung Joon Yoo
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Hangang Sacred Heart Hospital, 94-200, Yeongdeungpo-Dong, Yeongdeungpo-Gu Seoul 150-719, Republic of Korea
| | - Low-Tone Ho
- Department of Medical Research & Education, Taipei Veterans General Hospital, No. 201, Sec. 2, Shih-Pai Road, Taipei 112, Taiwan
- Division of Endocrinology & Metabolism, Taipei Veterans General Hospital, No. 201, Sec. 2, Shih-Pai Road, Taipei 112, Taiwan
- Institute of Physiology, National Yang-Ming University, No. 155, Li-Nong Street, Taipei 112, Taiwan
- *Low-Tone Ho:
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39
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Nayak M, Batra S. Copper-Catalyzed Cascade Reactions of Substituted 4-Iodopyrazolecarbaldehydes with 1,2-Phenylenediamines and 2-Aminophenols. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000662] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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