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Kitahara T, Tagami Y, Haga Y, Fustero S, Sugiishi T, Amii H. Alkylation and silylation of α-fluorobenzyl anion intermediates. Org Biomol Chem 2023; 21:9210-9215. [PMID: 37961788 DOI: 10.1039/d3ob01586f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Simple α-fluorobenzyl anions reacted with electrophiles such as non-activated alkyl halides and chlorotrimethylsilane. Upon treatment with LTMP as the base, fluoromethylbenzenes took part in the formation of α-monofluorobenzyl anions without stabilizing o-substituents. Furthermore, the resulting α-silyl fluoromethylbenzenes reacted with electrophiles such as acetophenone and benzaldehyde in the presence of cesium fluoride to form α-fluorobenzylated alcohols.
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Affiliation(s)
- Taku Kitahara
- Division of Molecular Science, Graduate School of Science and Technology, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan.
| | - Yuta Tagami
- Division of Molecular Science, Graduate School of Science and Technology, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan.
| | - Yuto Haga
- Division of Molecular Science, Graduate School of Science and Technology, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan.
| | - Santos Fustero
- Departamento de Química Orgánica, Facultad de Farmacia, Universitat de València, Vicente Andrés Estelles s/n, C.P.: 46100 Burjassot, Valencia, Spain
| | - Tsuyuka Sugiishi
- Division of Molecular Science, Graduate School of Science and Technology, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan.
| | - Hideki Amii
- Division of Molecular Science, Graduate School of Science and Technology, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan.
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2
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Topuzyan VO, Hovhannisyan AA, Makichyan AT, Hunanyan LS. Synthesis and Anticholinesterase Activity of Some 2,5-Disubstituted Imidazol-4-ones Derived from the Green Fluorescent Protein Chromophore. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s107042802207003x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Cheng Y, Hu Y. One-pot facile synthesis of 1,3,4-trisubstituted imidazolin-2-ones. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/0308234041209112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A one-pot synthesis of 1,3,4-trisubstituted imidazolin-2-ones, from the reaction of α-aminoacetophenone hydrochlorides with aryl isocyanates in good yields, is described.
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Affiliation(s)
- Yunfeng Cheng
- Department of Medicinal Chemistry, School of Pharmaceutical Science, Zhejiang University, Hangzhou 310031, P.R. China
| | - Yongzhou Hu
- Department of Medicinal Chemistry, School of Pharmaceutical Science, Zhejiang University, Hangzhou 310031, P.R. China
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4
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Abstract
Fluorination reactions of medicinal and biologically-active compounds will be discussed. Late stage fluorination strategies of medicinal targets have recently attracted considerable attention on account of the influence that a fluorine atom can impart to targets of medicinal importance, such as modulation of lipophilicity, electronegativity, basicity and bioavailability, the latter as a consequence of membrane permeability. Therefore, the recourse to late-stage fluorine substitution on compounds with already known and relevant biological activity can provide the pharmaceutical industry with new leads with improved medicinal properties. The fluorination strategies will take into account different fluorinating reagents, either of nucleophilic or electrophilic, and of radical nature. Diverse families of organic compounds such as (hetero)aromatic rings, and aliphatic substrates (sp(3), sp(2), and sp carbon atoms) will be studied in late-stage fluorination reaction strategies.
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Affiliation(s)
- Damian E Yerien
- Departamento de Química Orgánica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires-CONICET, Junín 954 CP, 1113-Buenos Aires, Argentina.
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5
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Nodwell MB, Bagai A, Halperin SD, Martin RE, Knust H, Britton R. Direct photocatalytic fluorination of benzylic C-H bonds with N-fluorobenzenesulfonimide. Chem Commun (Camb) 2016; 51:11783-6. [PMID: 26107990 DOI: 10.1039/c5cc04058b] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The late-stage fluorination of common synthetic building blocks and drug leads is an appealing reaction for medicinal chemistry. In particular, fluorination of benzylic C-H bonds provides a means to attenuate drug metabolism at this metabolically labile position. Here we report two complimentary strategies for the direct fluorination of benzylic C-H bonds using N-fluorobenzenesulfonimide and either a decatungstate photocatalyst or AIBN-initiation.
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Affiliation(s)
- Matthew B Nodwell
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A1S6, Canada.
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6
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Ruiz J, Mesa AF. From Diphosphino-Functionalized 1,3-Dialkylimidazolium Cations to Imidazolones through Dehydrogenative CN Coupling. Chemistry 2013; 20:102-5. [DOI: 10.1002/chem.201303773] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Indexed: 11/10/2022]
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7
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Predictive QSAR modeling of phosphodiesterase 4 inhibitors. J Mol Graph Model 2012; 32:32-8. [DOI: 10.1016/j.jmgm.2011.10.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 10/04/2011] [Accepted: 10/05/2011] [Indexed: 11/20/2022]
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8
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Gong X, Yang H, Liu H, Jiang Y, Zhao Y, Fu H. Simple and Efficient Copper-Catalyzed Approach to 2,4-Disubstituted Imidazolones. Org Lett 2010; 12:3128-31. [DOI: 10.1021/ol1008813] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaoyu Gong
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China, and Key Laboratory of Chemical Biology (Guangdong Province), Graduate School of Shenzhen, Tsinghua University, Shenzhen 518057, P. R. China
| | - Haijun Yang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China, and Key Laboratory of Chemical Biology (Guangdong Province), Graduate School of Shenzhen, Tsinghua University, Shenzhen 518057, P. R. China
| | - Hongxia Liu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China, and Key Laboratory of Chemical Biology (Guangdong Province), Graduate School of Shenzhen, Tsinghua University, Shenzhen 518057, P. R. China
| | - Yuyang Jiang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China, and Key Laboratory of Chemical Biology (Guangdong Province), Graduate School of Shenzhen, Tsinghua University, Shenzhen 518057, P. R. China
| | - Yufen Zhao
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China, and Key Laboratory of Chemical Biology (Guangdong Province), Graduate School of Shenzhen, Tsinghua University, Shenzhen 518057, P. R. China
| | - Hua Fu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China, and Key Laboratory of Chemical Biology (Guangdong Province), Graduate School of Shenzhen, Tsinghua University, Shenzhen 518057, P. R. China
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9
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Diness F, Meldal M. Amino acid derived 1,4-dialkyl substituted imidazolones. Biopolymers 2010; 94:236-41. [DOI: 10.1002/bip.21359] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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Diness F, Meldal M. Imidazolones in Diastereoselective Cyclization Reactions and CuII-Catalysed Cross-Coupling Reactions. Chemistry 2009; 15:7044-7. [DOI: 10.1002/chem.200900633] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Skoumbourdis AP, Leclair CA, Stefan E, Turjanski AG, Maguire W, Titus SA, Huang R, Auld DS, Inglese J, Austin CP, Michnick SW, Xia M, Thomas CJ. Exploration and optimization of substituted triazolothiadiazines and triazolopyridazines as PDE4 inhibitors. Bioorg Med Chem Lett 2009; 19:3686-92. [PMID: 19464886 DOI: 10.1016/j.bmcl.2009.01.057] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Revised: 01/16/2009] [Accepted: 01/20/2009] [Indexed: 10/21/2022]
Abstract
An expansion of structure-activity studies on a series of substituted 7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine PDE4 inhibitors and the introduction of a related [1,2,4]triazolo[4,3-b]pyridazine based inhibitor of PDE4 is presented. The development of SAR included strategic incorporation of known substituents on the critical catachol diether moiety of the 6-phenyl appendage on each heterocyclic core. From these studies, (R)-3-(2,5-dimethoxyphenyl)-6-(4-methoxy-3-(tetrahydrofuran-3-yloxy)phenyl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine (10) and (R)-3-(2,5-dimethoxyphenyl)-6-(4-methoxy-3-(tetrahydrofuran-3-yloxy)phenyl)-[1,2,4]triazolo[4,3-b]pyridazine (18) were identified as highly potent PDE4A inhibitors. Each of these analogues was submitted across a panel of 21 PDE family members and was shown to be highly selective for PDE4 isoforms (PDE4A, PDE4B, PDE4C, PDE4D). Both 10 and 18 were then evaluated in divergent cell-based assays to assess their relevant use as probes of PDE4 activity. Finally, docking studies with selective ligands (including 10 and 18) were undertaken to better understand this chemotypes ability to bind and inhibit PDE4 selectively.
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Affiliation(s)
- Amanda P Skoumbourdis
- NIH Chemical Genomics Center, National Human Genome Research Institute, NIH 9800 Medical Center Drive, MSC 3370 Bethesda, MD 20892-3370, USA
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12
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Jang MY, De Jonghe S, Gao LJ, Rozenski J, Herdewijn P. Development of Synthetic Strategies for the Construction of Pyrido[4,3-d]pyrimidine Libraries – the Discovery of a New Class of PDE-4 Inhibitors. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600339] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Ochiai H, Ohtani T, Ishida A, Kusumi K, Kato M, Kohno H, Odagaki Y, Kishikawa K, Yamamoto S, Takeda H, Obata T, Nakai H, Toda M. Highly potent PDE4 inhibitors with therapeutic potential. Bioorg Med Chem 2005; 12:4645-65. [PMID: 15358291 DOI: 10.1016/j.bmc.2004.06.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2004] [Revised: 06/23/2004] [Accepted: 06/23/2004] [Indexed: 11/26/2022]
Abstract
The hypothesis that the dose-limiting side effects of PDE4 inhibitors could be mediated via the central nervous system prompted us to design and synthesize a hydrophilic piperidine analog to improve the side effect profile of Ariflo 1, which is an orally active second-generation PDE4 inhibitor. During evaluation of various water-soluble piperidine analogs, 2a-b, 11b-14b, and 17a showed therapeutic potential in cross-species comparison studies. The following three findings were obtained: (1) The hydroxamic acid group, a well known metal chelator, caused a marked increase of inhibitory activity. (2) Water-soluble piperidine analogs lacked the configurational isomerism of Ariflo 1 without loss of inhibitory activity. (3) Replacement of the 4-methoxy residue with a difluoromethoxy residue led to an increase of in vivo potency. Structure-activity relationships are presented. Single-dose rat pharmacokinetic data for 11b, 12b, and 17a are also presented.
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Affiliation(s)
- Hiroshi Ochiai
- Minase Research Institute, Ono Pharmaceutical Co. Ltd., 3-1-1 Sakurai, Shimamoto, Osaka, Mishima 618-8585, Japan
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14
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Aav R, Kanger T, Pehk T, Lopp M. Unexpected Reactivity of Ethyl 2-(Diethylphosphono)Propionate Toward 2,2-Disubstituted-1,3-cyclopentanediones. PHOSPHORUS SULFUR 2005. [DOI: 10.1080/10426500590885309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- R. Aav
- a Department of Chemistry, Faculty of Science, Tallinn University of Technology, Estonia
| | - T. Kanger
- a Department of Chemistry, Faculty of Science, Tallinn University of Technology, Estonia
| | - T. Pehk
- b National Institute of Chemical Physics and Biophysics, Estonia
| | - M. Lopp
- c Department of Chemistry, Faculty of Science, Tallinn University of Technology, Estonia
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15
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Pevarello P, Brasca MG, Orsini P, Traquandi G, Longo A, Nesi M, Orzi F, Piutti C, Sansonna P, Varasi M, Cameron A, Vulpetti A, Roletto F, Alzani R, Ciomei M, Albanese C, Pastori W, Marsiglio A, Pesenti E, Fiorentini F, Bischoff JR, Mercurio C. 3-Aminopyrazole inhibitors of CDK2/cyclin A as antitumor agents. 2. Lead optimization. J Med Chem 2005; 48:2944-56. [PMID: 15828833 DOI: 10.1021/jm0408870] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Inhibitors of cyclin-dependent kinases (CDK) such as CDK2/cyclin A-E are currently undergoing clinical trials to verify their potential as new anticancer agents. In a previous article we described the lead discovery process of a 3-aminopyrazole class of CDK2/cyclin A-E inhibitors. The endpoint of this process was PNU-292137, a compound endowed with in vivo antitumor activity in a mouse tumor xenograft model. We optimized this lead compound to improve some physicochemical properties, notably solubility and plasma protein binding. This lead optimization process brought us to the discovery of (2S)-N-(5-cyclopropyl-1H-pyrazol-3-yl)-2-[4-(2-oxo-1-pyrrolidinyl)phenyl]propanamide (PHA-533533, 13), a compound with a balanced activity vs druglike profile. Compound 13 inhibited CDK2/cyclin A with a K(i) of 31 nM, counteracting tumor cell proliferation of different cell lines with an IC(50) in the submicromolar range. Solubility was improved more than 10 times over the starting lead, while plasma protein binding was decreased from 99% to 74%. With exploitation of this globally enhanced in vitro profile, 13 was more active than PNU-292137 in vivo in the A2780 xenograft model showing a tumor growth inhibition of 70%. Proof of mechanism of action was obtained in vivo by immunohistochemical analysis of tumor slices of 13-treated vs untreated animals.
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Affiliation(s)
- Paolo Pevarello
- Department Chemistry, Nerviano Medical Sciences, BU-Oncology and BU-Preclinical Science, Viale Pasteur 10, 20014 Nerviano (MI), Italy.
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16
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Ochiai H, Ohtani T, Ishida A, Kishikawa K, Yamamoto S, Takeda H, Obata T, Nakai H, Toda M. Orally active PDE4 inhibitor with therapeutic potential. Eur J Med Chem 2005; 39:555-71. [PMID: 15236836 DOI: 10.1016/j.ejmech.2004.02.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2003] [Revised: 01/29/2004] [Accepted: 02/12/2004] [Indexed: 11/22/2022]
Abstract
Based on the promising results obtained by the clinical trial of Ariflo, further optimization of the spatial arrangement of the three pharmacophores (the carboxylic acid moiety, nitrile moiety and 3-cyclopentyloxy-4-methoxyphenyl moiety) in the structure of Ariflo 1 was attempted using a bicyclo[3 ?3 ?0]octane template with more stereochemical diversity than the cyclohexane template of Ariflo 1. Biological evaluation of the decyanated analogs and further optimization of the cyclopentyloxy moiety of 2a-b were also performed. Among the compounds tested, 2a, 7a-b and 12a were found to be orally active and were estimated to have therapeutic potential based on cross-species and same-species comparisons. The structure-activity relationships (SARs) of these compounds were investigated and pharmacokinetic data for 2a and 7b were also obtained by single-dose studies in rats.
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Affiliation(s)
- Hiroshi Ochiai
- Medicinal Chemistry Research Laboratories, Minase Research Institute, Ono Pharmaceutical Co., Ltd., 3-1-1 Sakurai, Shimamoto, Mishima, Osaka 618-8585, Japan
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17
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Ochiai H, Odagaki Y, Ohtani T, Ishida A, Kusumi K, Kishikawa K, Yamamoto S, Takeda H, Obata T, Kobayashi K, Nakai H, Toda M. Design, synthesis, and biological evaluation of new phosphodiesterase type 4 inhibitors. Bioorg Med Chem 2004; 12:5063-78. [PMID: 15351390 DOI: 10.1016/j.bmc.2004.07.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2004] [Revised: 07/16/2004] [Accepted: 07/16/2004] [Indexed: 10/26/2022]
Abstract
The design, synthesis, and biological evaluation of new phosphodiesterase type 4 inhibitors, which possess new templates instead of a cyclohexane ring, are described. The mode of interaction with the enzyme is discussed based on the structure-activity relationship (SAR) data obtained for the synthesized inhibitors. Furthermore, the roles of three pharmacophores, a catechol moiety, a nitrile moiety, and acidic moieties, are discussed using in silico docking studies. More detailed biological evaluations of selected compounds are also presented.
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Affiliation(s)
- Hiroshi Ochiai
- Minase Research Institute, Ono Pharmaceutical Co., Ltd, 3-1-1 Sakurai, Shimamoto, Mishima, Osaka 618-8585, Japan
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18
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Ochiai H, Ohtani T, Ishida A, Kusumi K, Kato M, Kohno H, Kishikawa K, Obata T, Nakai H, Toda M. Highly potent PDE4 inhibitors with therapeutic potential. Bioorg Med Chem Lett 2004; 14:207-10. [PMID: 14684329 DOI: 10.1016/j.bmcl.2003.09.087] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Based on the hypothesis that the dose-limiting side effects of PDE4 inhibitors could be mediated via the central nervous system (CNS), design and synthesis of a hydrophilic analogue is considered to be one approach to improving the side-effect profile of Ariflo 1. Water-soluble piperidine derivatives were found to possess therapeutic potential.
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Affiliation(s)
- Hiroshi Ochiai
- Minase Research Institute, Ono Pharmaceutical Co. Ltd, 3-1-1 Sakurai, Shimamoto, Mishima, Osaka 618-8585, Japan
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19
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Ochiai H, Ohtani T, Ishida A, Kishikawa K, Obata T, Nakai H, Toda M. Orally active PDE4 inhibitors with therapeutic potential. Bioorg Med Chem Lett 2004; 14:1323-7. [PMID: 14980691 DOI: 10.1016/j.bmcl.2003.12.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2003] [Revised: 12/01/2003] [Accepted: 12/03/2003] [Indexed: 11/27/2022]
Abstract
Based on the successful results in the clinical trial of Ariflo, further optimization of the spatial arrangement of the three pharmacophores (carboxylic acid moiety, nitrile moiety and 3-cyclopentyl-4-methoxyphenyl moiety) in the structure of Ariflo 1 was attempted using a bicyclo[3.3.0]octane template instead of a cyclohexane template. As a result, 2a, 7a and 7b were found to be orally active and were predicted to have an improved therapeutic potential based on evaluation by cross-species and same-species comparisons. Structure-activity relationships (SARs) of these compounds are also discussed.
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Affiliation(s)
- Hiroshi Ochiai
- Minase Research Institute, Ono Pharmaceutical Co. Ltd., 3-1-1 Sakurai, Shimamoto, Mishima, Osaka 618-8585, Japan
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20
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Ochiai H, Ishida A, Ohtani T, Kusumi K, Kishikawa K, Obata T, Nakai H, Toda M. New orally active PDE4 inhibitors with therapeutic potential. Bioorg Med Chem Lett 2004; 14:29-32. [PMID: 14684291 DOI: 10.1016/j.bmcl.2003.10.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Structural optimization of pyrazolopyridine derivative 2, which is one of the newly discovered chemical leads for PDE4 inhibitors from our in-house library, was carried out successfully. The process of discovery of new orally active PDE4 inhibitors, which are expected to possess therapeutic potential, is presented and their structure-activity relationships are discussed.
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Affiliation(s)
- Hiroshi Ochiai
- Minase Research Institute, Ono Pharmaceutical Co. Ltd, 3-1-1 Sakurai, Shimamoto, Mishima, Osaka 618-8585, Japan
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21
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Ochiai H, Ishida A, Ohtani T, Kusumi K, Kishikawa K, Yamamoto S, Takeda H, Obata T, Nakai H, Toda M. Discovery of New Orally Active Phosphodiesterase (PDE4) Inhibitors. Chem Pharm Bull (Tokyo) 2004; 52:1098-104. [PMID: 15340197 DOI: 10.1248/cpb.52.1098] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A series of 4-anilinopyrazolopyridine derivatives were synthesized and biologically evaluated as inhibitors of phosphodiesterase (PDE4). Chemical modification of 3, a structurally new chemical lead that was found in our in-house library, was focused on 1- and 3-substituents. Full details of the discovery of a new orally active chemical lead 5 are presented. Structure-activity relationship data, pharmacological evaluation, and the subtype selectivity study are also presented.
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Affiliation(s)
- Hiroshi Ochiai
- Minase Research Institute, Ono Pharmaceutical Co., Ltd., Mishima, Osaka 618-8585, Japan
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