1
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Liu C, Miao R, Raza F, Qian H, Tian X. Research progress and challenges of TRPV1 channel modulators as a prospective therapy for diabetic neuropathic pain. Eur J Med Chem 2022; 245:114893. [DOI: 10.1016/j.ejmech.2022.114893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/26/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022]
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2
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Minić A, Pešić MS, Novaković SB, Bogdanović GA, Todosijević A, Komatina DI, Stevanović D. Synthesis, structural and electrochemical characterization of novel ferrocene-containing tetrahydropyrimidin-2(1H)-ones. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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3
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Gujarati NA, Undem BJ, Korlipara VL. Design, Synthesis, and Evaluation of Isoquinoline Ureas as TRPV1 Antagonists. Med Chem 2020; 16:202-211. [DOI: 10.2174/1573406415666190626130453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 05/06/2019] [Accepted: 06/09/2019] [Indexed: 11/22/2022]
Abstract
Background:
The inhibition of transient receptor potential vanilloid receptor 1
(TRPV1) has emerged as a novel approach for the treatment of various pain states. Pyrrolidinyl
urea, SB 705498 with pKb = 7.3 in guinea pig TRPV1 receptor has been investigated in Phase II
clinical trials for pain and chronic cough. Another heteroaryl urea derivative, A-425619 1, has
been reported to be a potent and selective TRPV1 antagonist of capsaicin-evoked receptor activation
with an IC50 value of 4 nM in hTRPV1.
Objective:
A series of thirteen A-425619 1 analogues with modifications centered around the Cregion
were synthesized to understand the binding site characteristics of TRPV1 receptors.
Method:
We synthesized a series of isoquinoline ureas and evaluated their antagonist potency using
smooth muscle assay using guinea pig trachea along with the evaluation of the molecular properties
and molecular modeling using CoMFA studies.
Results:
p-Chloro 4, p-bromo 5, m-isothiocyanate 15, and p-isothiocyanate 16 derivatives were
found to be the most potent members of the series with pKb values in the range of 7.3-7.4 in the
functional assay using guinea pig trachea. The lead compound A-425619 1 exhibited a pKb value
of 8.1 in this assay.
Conclusion:
The para-substituted analogues were found to be more potent than the ortho- and
meta- analogues in the biological assay. This observation was further supported by molecular
modeling studies using CoMFA.
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Affiliation(s)
- Nehaben A. Gujarati
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, United States
| | - Bradley J. Undem
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21224, United States
| | - Vijaya L. Korlipara
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, United States
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4
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Minić A, Jovanović JP, Bogdanović GA, Pejović A, Radulović N, Damljanović I, Stevanović D. Synthesis, structural and electrochemical characterization of novel 1,3-ketoureas bearing a ferrocenyl group. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.12.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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5
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Iglesias-Sigüenza J, Izquierdo C, Díez E, Fernández R, Lassaletta JM. N-Heterotricyclic cationic carbene ligands. Synthesis, reactivity and coordination chemistry. Dalton Trans 2018. [PMID: 29528072 DOI: 10.1039/c8dt00213d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal complexes based on cationic N-heterotricyclic carbenes have been synthesized and the impact of charge delocalization on their electronic properties has been analysed.
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Affiliation(s)
- Javier Iglesias-Sigüenza
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- 41012 Sevilla
- Spain
| | - Cristina Izquierdo
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- 41012 Sevilla
- Spain
| | - Elena Díez
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- 41012 Sevilla
- Spain
| | - Rosario Fernández
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- 41012 Sevilla
- Spain
| | - José M. Lassaletta
- Instituto Investigaciones Químicas (CSIC-USe) and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- 41092 Sevilla
- Spain
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6
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Kang S, Kim YM, Kim RY, Seo MJ, No Z, Nam K, Kim S, Kim J. Synthesis and structure-activity studies of side chain analogues of the anti-tubercular agent, Q203. Eur J Med Chem 2016; 125:807-815. [PMID: 27750198 DOI: 10.1016/j.ejmech.2016.09.082] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/23/2016] [Accepted: 09/24/2016] [Indexed: 11/29/2022]
Abstract
The anti-tubercular activity of 6-chloro-2-ethyl-N-(4-(4-(4-(trifluoromethoxy)phenyl)piperidin-1-yl)benzyl)imidazo [1,2-a]pyridine-3-carboxamide (Q203) is modified by varying its side chain. In this study, we synthesized Q203 analogues with different side chains and studied their effects on anti-tubercular activity. Many analogues showed good potency against M. tuberculosis replicating in liquid broth culture medium (extracellular activity) regardless of chain length and conformational changes. However, a polar character in the side chain region was unfavorable for anti-tubercular activity. The analogues, 25, 28, 35, and 36, displayed excellent activity against M. tuberculosis replicating inside macrophages (intracellular activity) and promising pharmacokinetic (PK) properties with high drug exposure level and long half-life.
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Affiliation(s)
- Sunhee Kang
- Chemistry Platform, Institute Pasteur Korea, 16 Daewangpangyo-ro, 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Republic of Korea; College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
| | - Young Mi Kim
- Chemistry Platform, Institute Pasteur Korea, 16 Daewangpangyo-ro, 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Republic of Korea
| | - Ryang Yeo Kim
- Tuberculosis Research Laboratory, Institute Pasteur Korea, 16 Daewangpangyo-ro, 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Republic of Korea
| | - Min Jung Seo
- Chemistry Platform, Institute Pasteur Korea, 16 Daewangpangyo-ro, 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Republic of Korea
| | - Zaesung No
- Chemistry Platform, Institute Pasteur Korea, 16 Daewangpangyo-ro, 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Republic of Korea
| | - Kiyean Nam
- Qurient Co. Ltd., 242 Pangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Republic of Korea
| | - Sanghee Kim
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea.
| | - Jaeseung Kim
- Chemistry Platform, Institute Pasteur Korea, 16 Daewangpangyo-ro, 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Republic of Korea.
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7
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Cavalier MC, Ansari MI, Pierce AD, Wilder PT, McKnight LE, Raman EP, Neau DB, Bezawada P, Alasady MJ, Charpentier TH, Varney KM, Toth EA, MacKerell AD, Coop A, Weber DJ. Small Molecule Inhibitors of Ca(2+)-S100B Reveal Two Protein Conformations. J Med Chem 2016; 59:592-608. [PMID: 26727270 DOI: 10.1021/acs.jmedchem.5b01369] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The drug pentamidine inhibits calcium-dependent complex formation with p53 ((Ca)S100B·p53) in malignant melanoma (MM) and restores p53 tumor suppressor activity in vivo. However, off-target effects associated with this drug were problematic in MM patients. Structure-activity relationship (SAR) studies were therefore completed here with 23 pentamidine analogues, and X-ray structures of (Ca)S100B·inhibitor complexes revealed that the C-terminus of S100B adopts two different conformations, with location of Phe87 and Phe88 being the distinguishing feature and termed the "FF-gate". For symmetric pentamidine analogues ((Ca)S100B·5a, (Ca)S100B·6b) a channel between sites 1 and 2 on S100B was occluded by residue Phe88, but for an asymmetric pentamidine analogue ((Ca)S100B·17), this same channel was open. The (Ca)S100B·17 structure illustrates, for the first time, a pentamidine analog capable of binding the "open" form of the "FF-gate" and provides a means to block all three "hot spots" on (Ca)S100B, which will impact next generation (Ca)S100B·p53 inhibitor design.
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Affiliation(s)
- Michael C Cavalier
- Department of Biochemistry and Molecular Biology, Center for Biomolecular Therapeutics (CBT), University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | - Mohd Imran Ansari
- Computer Aided Drug Design Center, School of Pharmacy, University of Maryland , Baltimore, Maryland 21201, United States
| | - Adam D Pierce
- Department of Biochemistry and Molecular Biology, Center for Biomolecular Therapeutics (CBT), University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | - Paul T Wilder
- Department of Biochemistry and Molecular Biology, Center for Biomolecular Therapeutics (CBT), University of Maryland School of Medicine , Baltimore, Maryland 21201, United States.,Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | - Laura E McKnight
- Department of Biochemistry and Molecular Biology, Center for Biomolecular Therapeutics (CBT), University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | - E Prabhu Raman
- Computer Aided Drug Design Center, School of Pharmacy, University of Maryland , Baltimore, Maryland 21201, United States
| | | | - Padmavani Bezawada
- Computer Aided Drug Design Center, School of Pharmacy, University of Maryland , Baltimore, Maryland 21201, United States
| | - Milad J Alasady
- Department of Biochemistry and Molecular Biology, Center for Biomolecular Therapeutics (CBT), University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | - Thomas H Charpentier
- Department of Biochemistry and Molecular Biology, Center for Biomolecular Therapeutics (CBT), University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | - Kristen M Varney
- Department of Biochemistry and Molecular Biology, Center for Biomolecular Therapeutics (CBT), University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | - Eric A Toth
- Department of Biochemistry and Molecular Biology, Center for Biomolecular Therapeutics (CBT), University of Maryland School of Medicine , Baltimore, Maryland 21201, United States.,Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States.,Institute for Bioscience and Biotechnology Research , 9600 Gudelsky Drive, Rockville, Maryland 20850, United States
| | - Alexander D MacKerell
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States.,Computer Aided Drug Design Center, School of Pharmacy, University of Maryland , Baltimore, Maryland 21201, United States
| | - Andrew Coop
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States.,Computer Aided Drug Design Center, School of Pharmacy, University of Maryland , Baltimore, Maryland 21201, United States
| | - David J Weber
- Department of Biochemistry and Molecular Biology, Center for Biomolecular Therapeutics (CBT), University of Maryland School of Medicine , Baltimore, Maryland 21201, United States.,Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
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8
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Wang J, Li Y, Yang Y, Du J, Zhang S, Yang L. In silico research to assist the investigation of carboxamide derivatives as potent TRPV1 antagonists. Mol BioSyst 2015; 11:2885-99. [DOI: 10.1039/c5mb00356c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The transient receptor potential vanilloid type 1 (TRPV1), a non-selective cation channel, is known for its essential role in the pathogenesis of various pain conditions such as nerve damage induced hyperalgesia, diabetic neuropathy and cancer pain.
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Affiliation(s)
- Jinghui Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- Faculty of Chemical
- Environmental and Biological Science and Technology
- Dalian University of Technology
- Dalian
| | - Yan Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- Faculty of Chemical
- Environmental and Biological Science and Technology
- Dalian University of Technology
- Dalian
| | - Yinfeng Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- Faculty of Chemical
- Environmental and Biological Science and Technology
- Dalian University of Technology
- Dalian
| | - Jian Du
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- Faculty of Chemical
- Environmental and Biological Science and Technology
- Dalian University of Technology
- Dalian
| | - Shuwei Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- Faculty of Chemical
- Environmental and Biological Science and Technology
- Dalian University of Technology
- Dalian
| | - Ling Yang
- Laboratory of Pharmaceutical Resource Discovery
- Dalian Institute of Chemical Physics
- Graduate School of the Chinese Academy of Sciences
- Dalian
- China
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9
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Tang M, Chan CK, Tsang DP, Wong Y, Chan MM, Wong KM, Yam VW. Saturated Red-Light-Emitting Gold(III) Triphenylamine Dendrimers for Solution-Processable Organic Light-Emitting Devices. Chemistry 2014; 20:15233-41. [DOI: 10.1002/chem.201404313] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Indexed: 11/07/2022]
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10
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Kang S, Kim RY, Seo MJ, Lee S, Kim YM, Seo M, Seo JJ, Ko Y, Choi I, Jang J, Nam J, Park S, Kang H, Kim HJ, Kim J, Ahn S, Pethe K, Nam K, No Z, Kim J. Lead optimization of a novel series of imidazo[1,2-a]pyridine amides leading to a clinical candidate (Q203) as a multi- and extensively-drug-resistant anti-tuberculosis agent. J Med Chem 2014; 57:5293-305. [PMID: 24870926 DOI: 10.1021/jm5003606] [Citation(s) in RCA: 127] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A critical unmet clinical need to combat the global tuberculosis epidemic is the development of potent agents capable of reducing the time of multi-drug-resistant (MDR) and extensively-drug-resistant (XDR) tuberculosis therapy. In this paper, we report on the optimization of imidazo[1,2-a]pyridine amide (IPA) lead compound 1, which led to the design and synthesis of Q203 (50). We found that the amide linker with IPA core is very important for activity against Mycobacterium tuberculosis H37Rv. Linearity and lipophilicity of the amine part in the IPA series play a critical role in improving in vitro and in vivo efficacy and pharmacokinetic profile. The optimized IPAs 49 and 50 showed not only excellent oral bioavailability (80.2% and 90.7%, respectively) with high exposure of the area under curve (AUC) but also displayed significant colony-forming unit (CFU) reduction (1.52 and 3.13 log10 reduction at 10 mg/kg dosing level, respectively) in mouse lung.
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Affiliation(s)
- Sunhee Kang
- Medicinal and Bioorganic Chemistry Group, ‡Antibacterial Drug Discovery Group, and §Drug Metabolism and Pharmacokinetics Group, Institut Pasteur Korea , 16 Daewnagpangyo-ro, 712 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do 463-400, Korea
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11
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Bellizzi ME, Bhatia AV, Cullen SC, Gandarilla J, Kruger AW, Welch DS. Asymmetric Synthesis of a TRPV1 Antagonist via tert-Butanesulfinamide-Directed Reductive Amination with a Chromanone. Org Process Res Dev 2014. [DOI: 10.1021/op400184f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Mary E. Bellizzi
- Process Research and Development, AbbVie Inc., 1 North
Waukegan Road, North Chicago, Illinois 60064-1802, United States
| | - Ashok V. Bhatia
- Process Research and Development, AbbVie Inc., 1 North
Waukegan Road, North Chicago, Illinois 60064-1802, United States
| | - Steven C. Cullen
- Process Research and Development, AbbVie Inc., 1 North
Waukegan Road, North Chicago, Illinois 60064-1802, United States
| | - Jorge Gandarilla
- Process Research and Development, AbbVie Inc., 1 North
Waukegan Road, North Chicago, Illinois 60064-1802, United States
| | - Albert W. Kruger
- Process Research and Development, AbbVie Inc., 1 North
Waukegan Road, North Chicago, Illinois 60064-1802, United States
| | - Dennie S. Welch
- Process Research and Development, AbbVie Inc., 1 North
Waukegan Road, North Chicago, Illinois 60064-1802, United States
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12
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Maruoka H, Okabe F, Takasu M, Masumoto E, Fujioka T, Yamagata K. An Approach to the Synthesis of Novel Dihydroindoles Bearing Electron-Withdrawing Groups at C-2 Position. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Liu W, Tang Y, Guo Y, Sun B, Zhu H, Xiao Y, Dong D, Yang C. Synthesis, characterization and bioactivity determination of ferrocenyl urea derivatives. Appl Organomet Chem 2012. [DOI: 10.1002/aoc.2837] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Yanting Tang
- High Throughput Molecular Drug Discovery Center; Tianjin International Joint Academy of Biotechnology and Medicine, TEDA; Tianjin; 300457; People's Republic of China
| | - Yu Guo
- High Throughput Molecular Drug Discovery Center; Tianjin International Joint Academy of Biotechnology and Medicine, TEDA; Tianjin; 300457; People's Republic of China
| | - Bo Sun
- High Throughput Molecular Drug Discovery Center; Tianjin International Joint Academy of Biotechnology and Medicine, TEDA; Tianjin; 300457; People's Republic of China
| | - Hemin Zhu
- High Throughput Molecular Drug Discovery Center; Tianjin International Joint Academy of Biotechnology and Medicine, TEDA; Tianjin; 300457; People's Republic of China
| | - Yanyan Xiao
- High Throughput Molecular Drug Discovery Center; Tianjin International Joint Academy of Biotechnology and Medicine, TEDA; Tianjin; 300457; People's Republic of China
| | - Dandan Dong
- High Throughput Molecular Drug Discovery Center; Tianjin International Joint Academy of Biotechnology and Medicine, TEDA; Tianjin; 300457; People's Republic of China
| | - Cheng Yang
- High Throughput Molecular Drug Discovery Center; Tianjin International Joint Academy of Biotechnology and Medicine, TEDA; Tianjin; 300457; People's Republic of China
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14
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Perner RJ, Koenig JR, DiDomenico S, Gomtsyan A, Schmidt RG, Lee CH, Hsu MC, McDonald HA, Gauvin DM, Joshi S, Turner TM, Reilly RM, Kym PR, Kort ME. Synthesis and biological evaluation of 5-substituted and 4,5-disubstituted-2-arylamino oxazole TRPV1 antagonists. Bioorg Med Chem 2010; 18:4821-9. [DOI: 10.1016/j.bmc.2010.04.099] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2010] [Revised: 04/28/2010] [Accepted: 04/30/2010] [Indexed: 11/27/2022]
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15
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Brown BS, Keddy R, Perner RJ, Didomenico S, Koenig JR, Jinkerson TK, Hannick SM, Mcdonald HA, Bianchi BR, Honore P, Puttfarcken PS, Moreland RB, Marsh KC, Faltynek CR, Lee C. Discovery of TRPV1 antagonist ABT-116. Bioorg Med Chem Lett 2010; 20:3291-4. [DOI: 10.1016/j.bmcl.2010.04.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Revised: 04/07/2010] [Accepted: 04/12/2010] [Indexed: 11/23/2022]
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16
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Kocí J, Oliver AG, Krchnák V. Unprecedented rearrangement of 2-(2-aminoethyl)-1-aryl-3,4-dihydropyrazino[1,2-b]indazole-2-ium 6-oxides to 2,3-dihydro-1H-imidazo[1,2-b]indazoles. J Org Chem 2010; 75:502-5. [PMID: 20000789 DOI: 10.1021/jo902301x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Easily accessible 2-(2-aminoethyl)-1-aryl-3,4-dihydropyrazino[1,2-b]indazole-2-ium 6-oxides rearranged to 2,3-dihydro-1H-imidazo[1,2-b]indazoles under mild conditions. The rearrangement appeared to be general, tolerated a wide range of functional groups, and provided access to an as yet unexplored class of heterocycles. Herein we report the characterization of these heterocycles.
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Affiliation(s)
- Jan Kocí
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Center, University of Notre Dame, Notre Dame, Indiana 46556, USA
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17
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Maruoka H, Okabe F, Koutake Y, Masumoto E, Fujioka T, Yamagata K. Synthesis of Dihydroindoles and Tetrahydroquinolines by the Intramolecular Diels-Alder Reaction of N-Alkenylated 2-Acylamino-3-furancarbonitriles. HETEROCYCLES 2010. [DOI: 10.3987/com-10-11936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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19
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Bouillon I, Zajícek J, Pudelová N, Krchnák V. Remarkably efficient synthesis of 2H-indazole 1-oxides and 2H-indazoles via tandem carbon-carbon followed by nitrogen-nitrogen bond formation. J Org Chem 2008; 73:9027-32. [PMID: 18937414 DOI: 10.1021/jo8018895] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Base-catalyzed tandem carbon-carbon followed by nitrogen-nitrogen bond formations quantitatively converted N-alkyl-2-nitro-N-(2-oxo-2-aryl-ethyl)-benzenesulfonamides to 2H-indazoles 1-oxides under mild conditions. Triphenylphosphine or mesyl chloride/triethylamine-mediated deoxygenation afforded 2H-indazoles.
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Affiliation(s)
- Isabelle Bouillon
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Center, University of Notre Dame, Notre Dame, Indiana 46556, USA
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20
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