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Rajendran S, Sivalingam K, Karnam Jayarampillai RP, Wang WL, Salas CO. Friedlӓnder's synthesis of quinolines as a pivotal step in the development of bioactive heterocyclic derivatives in the current era of medicinal chemistry. Chem Biol Drug Des 2022; 100:1042-1085. [PMID: 35322543 DOI: 10.1111/cbdd.14044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 02/14/2022] [Accepted: 03/20/2022] [Indexed: 01/25/2023]
Abstract
In the current scenario of medicinal chemistry, quinoline plays a pivotal role in the design of new heterocyclic compounds with several pharmacological properties, so the search for new synthetic methodologies and their application in drug discovery has been widely studied. So far, many procedures have been performed for the preparation of quinoline scaffolds, among which Friedländer quinoline synthesis plays an important role in obtaining these heterocycles. The Friedländer reaction involves condensation between 2-aminobenzaldehydes and keto-compounds. The quinoline nucleus, once obtained through the Friedländer synthesis, has been extensively modified so that these derivatives can exhibit a large number of biological activities such as anticancer, antimalarial, antimicrobial, antifungal, antituberculosis, and antileishmanial properties. In this work, the focus is on the applicability of the Friedländer reaction in the synthesis of various types of bioactive heterocyclic quinoline compounds, which to date has not been reported in the context of medicinal chemistry. The main part of this review selectively focuses on research from 2010 to date and will present highlights of the Friedländer quinoline synthesis procedures and findings to address biological and pharmacological activities.
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Affiliation(s)
- Satheeshkumar Rajendran
- Departamento de Química Orgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Kalaiselvi Sivalingam
- Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts, USA
| | | | - Wen-Long Wang
- School of Pharmaceutical Sciences, Jiangnan University, Wuxi, China
| | - Cristian O Salas
- Departamento de Química Orgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
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Salem MA, Abu‐Hashem AA, Abdelgawad AAM, Gouda MA. Synthesis and reactivity of thieno[2,3‐
b
]quinoline derivatives (Part
II
). J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Mohammed A. Salem
- Department of Chemistry, Faculty of Science and Arts King Khalid University Mohail Assir Saudi Arabia
- Department of Chemistry, Faculty of Science Al‐Azhar University Cairo Egypt
| | - Ameen A. Abu‐Hashem
- Photochemistry Department (Heterocyclic Unit) National Research Centre Giza Egypt
- Chemistry Departments, Faculty of Science Jazan University Jazan Saudi Arabia
| | - Ahmed A. M. Abdelgawad
- Chemistry Departments, Faculty of Science Jazan University Jazan Saudi Arabia
- Medicinal and Aromatic Plants Department Desert Research Center Cairo Egypt
| | - Moustafa A. Gouda
- Department of Chemistry, Faculty of Science and Arts Taibah University, Ulla Medina Saudi Arabia
- Department of Chemistry Faculty of Science, Mansoura University, Mansoura Egypt
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Chu Z, Xu Q, Zhu Q, Ma X, Mo J, Lin G, Zhao Y, Gu Y, Bian L, Shao L, Guo J, Ye W, Li J, He G, Xu Y. Design, synthesis and biological evaluation of novel benzoxaborole derivatives as potent PDE4 inhibitors for topical treatment of atopic dermatitis. Eur J Med Chem 2021; 213:113171. [PMID: 33482600 DOI: 10.1016/j.ejmech.2021.113171] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 01/07/2021] [Accepted: 01/07/2021] [Indexed: 02/06/2023]
Abstract
In this work, a series of structurally novel benzoxaborole derivatives were designed, synthesized and biologically evaluated as PDE4 inhibitors for battling atopic dermatitis (AD). Among them, the majority exhibited superior PDE4B inhibitory activities to that of the lead compound Crisaborole, an approved PDE4 inhibitor. In particular, 72, the most potent PDE4B inhibitor throughout this series, displayed 136-fold improved enzymatic activity (IC50 = 0.42 nM) as compared to Crisaborole (IC50 = 57.20 nM), along with favorable isoform specificity. In the phorbol ester (PMA)-induced mouse ear oedema model, 72 exerted remarkably greater efficacy than Crisaborole at the same dosage (P < 0.05). Moreover, the ointment of 72 exerted dramatically enhanced therapeutic potency than the ointment of Crisaborole (P < 0.05) in the calcipotriol-induced mouse AD model. In addition to the potent in vitro and in vivo activity, 72 displayed favorable safety in the repeated oral dose toxicity study and did not exhibit phototoxicity. With the above attractive biological performance, 72 is worthy of further functional investigation as a novel anti-AD therapeutic agent.
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Affiliation(s)
- Zhaoxing Chu
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, China; Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 21009, China; Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Qinlong Xu
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China; Department of Medicinal Chemistry, Anhui University of Chinese Medicine, Hefei, 230031, China
| | - Qihua Zhu
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, China; Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 21009, China
| | - Xiaodong Ma
- Department of Medicinal Chemistry, Anhui University of Chinese Medicine, Hefei, 230031, China
| | - Jiajia Mo
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Gaofeng Lin
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Yan Zhao
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Yuanfeng Gu
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Lincui Bian
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Li Shao
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Jing Guo
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Wenfeng Ye
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Jiaming Li
- Department of Medicinal Chemistry, Anhui University of Chinese Medicine, Hefei, 230031, China
| | - Guangwei He
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China.
| | - Yungen Xu
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, China; Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 21009, China.
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Rogalski S, Żak P, Pawluć P, Kubicki M, Pietraszuk C. Carbamato-benzylidene ruthenium chelates – Synthesis, structure and catalytic activity in olefin metathesis. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.01.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Sugimoto O, Iwasaki H, Tanji KI. Development of a Facile and Inexpensive Route for the Preparation of α-Halobenzopyridines from α-Unsubstituted Benzopyridines. HETEROCYCLES 2015. [DOI: 10.3987/com-15-13234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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7
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Shankar M, Balasubramaniam A, Gowrishankar NL, Mahendran S. Synthesis and Biological Evaluation of New Bis-Indolyl (3-O-Benzyl-1,2-O-Isopropylidenexylopentadialdose-α-D-Glucofuranose). Pharm Chem J 2014. [DOI: 10.1007/s11094-014-1071-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Shankar M, Balasubramaniam A, Gowrishankar NL, Mahendran S. Synthesis and Biological Evaluation of New Bis-Indolyl (3-O-Benzyl-1,2-O-Isopropylidenexylopentadialdose-α-D-Glucofuranose). Pharm Chem J 2014. [DOI: 10.1007/s11094-014-1001-2] [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]
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9
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Bandyopadhyay P, Prasad GK, Sathe M, Sharma P, Kumar A, Kaushik MP. Titania nanomaterials: efficient and recyclable heterogeneous catalysts for the solvent-free synthesis of poly-substituted quinolines via Friedlander hetero-annulation. RSC Adv 2014. [DOI: 10.1039/c3ra46128a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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10
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PEG-SO3H as a catalyst in aqueous media: A simple, proficient and green approach for the synthesis of quinoline derivatives. J CHEM SCI 2013. [DOI: 10.1007/s12039-012-0353-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Beydoun K, Doucet H. One-Pot Synthesis of Furo- or Thienoquinolines through Sequential Imination and Intramolecular Palladium-Catalyzed Direct Arylation. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201142] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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12
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Shankar M, Balasubramaniam A, Gowrishankar NL, Mahendran S. Synthesis and biological evaluation of new bis-indolyl (3-O-benzyl-1,2-O-isopropylidenexylopentadialdose-α-D-glucofuranose). Pharm Chem J 2012. [DOI: 10.1007/s11094-012-0804-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Shen Z, Chen G, Wang Q, Yu Y, Zhou C, Wang Y. Sonochemistry synthesis and enhanced photocatalytic H2-production activity of nanocrystals embedded in CdS/ZnS/In2S3 microspheres. NANOSCALE 2012; 4:2010-2017. [PMID: 22344500 DOI: 10.1039/c2nr12045c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
ZnS and CdS nanocrystals with a size of 5-10 nm embedded in CdS/ZnS/In(2)S(3) microspheres have been successfully synthesized by a sonochemistry method at room temperature and normal pressure without the use of templates or surfactants. The as-prepared products have been characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), EDX line spectrum, high-angle annular dark-field imaging (HAADF), UV-visible diffuse reflectance spectra (UV-vis) and photoluminescence (PL) spectra. The reaction process in the solution under ultrasonic irradiation was investigated by gas chromatography-mass spectrometry (GC-MS). The mechanisms of phase formation and morphology control of CdS/ZnS/In(2)S(3) microspheres are proposed and discussed in detail. Furthermore, the photocatalytic activity of CdS/ZnS/In(2)S(3) for water splitting was investigated under visible-light irradiation (λ > 400 nm) and an especially high photocatalytic activity (apparent yield is 40.9% at 420 nm) was achieved in the absence of co-catalysts.
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Affiliation(s)
- Zaoyu Shen
- Department of Chemistry, Harbin Institute of Technology, Harbin, 150001, People's Republic of China
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Mitamura T, Ogawa A. Synthesis of 2,4-Diiodoquinolines via the Photochemical Cyclization of o-Alkynylaryl Isocyanides with Iodine. J Org Chem 2011; 76:1163-6. [DOI: 10.1021/jo1021772] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takenori Mitamura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Akiya Ogawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
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15
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Shiri M, Zolfigol MA, Kruger HG, Tanbakouchian Z. Friedländer Annulation in the Synthesis of Azaheterocyclic Compounds. ADVANCES IN HETEROCYCLIC CHEMISTRY 2011. [DOI: 10.1016/b978-0-12-385464-3.00002-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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16
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Kobayashi T, Arisawa M, Shuto S. Alkene isomerization/enamide-ene and diene metathesis for the construction of indoles, quinolines, benzofurans and chromenes with a chiral cyclopropane substituent. Org Biomol Chem 2011; 9:1219-24. [DOI: 10.1039/c0ob00597e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Mitamura T, Nomoto A, Sonoda M, Ogawa A. Synthesis of 2-Halogenated Quinolines by Halide-Mediated Intramolecular Cyclization ofo-Alkynylaryl Isocyanides. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2010. [DOI: 10.1246/bcsj.20100044] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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18
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Lekhok KC, Bhuyan D, Prajapati D, Boruah RC. Zinc triflate: a highly efficient reusable catalyst in the synthesis of functionalized quinolines via Friedlander annulation. Mol Divers 2009; 14:841-6. [DOI: 10.1007/s11030-009-9214-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2009] [Accepted: 11/18/2009] [Indexed: 11/28/2022]
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19
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Tetrabutylammonium chloride-triggered 6-endo cyclization of o-alkynylisocyanobenzenes: an efficient synthesis of 2-chloro-3-substituted quinolines. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.09.096] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Marco-Contelles J, Pérez-Mayoral E, Samadi A, Carreiras MDC, Soriano E. Recent Advances in the Friedländer Reaction. Chem Rev 2009; 109:2652-71. [DOI: 10.1021/cr800482c] [Citation(s) in RCA: 505] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- José Marco-Contelles
- Laboratorio de Radicales Libres y Química Computacional (IQOG, CSIC), Madrid, Spain, Departamento de Química Inorgánica y Química Técnica, Facultad de Ciencias, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain, and iMed.UL, Research Institute for Medicines and Pharmaceutical Sciences, Faculty of Pharmacy, University of Lisbon, Av. Forcas Armadas, 1600-083 Lisbon, Portugal
| | - Elena Pérez-Mayoral
- Laboratorio de Radicales Libres y Química Computacional (IQOG, CSIC), Madrid, Spain, Departamento de Química Inorgánica y Química Técnica, Facultad de Ciencias, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain, and iMed.UL, Research Institute for Medicines and Pharmaceutical Sciences, Faculty of Pharmacy, University of Lisbon, Av. Forcas Armadas, 1600-083 Lisbon, Portugal
| | - Abdelouahid Samadi
- Laboratorio de Radicales Libres y Química Computacional (IQOG, CSIC), Madrid, Spain, Departamento de Química Inorgánica y Química Técnica, Facultad de Ciencias, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain, and iMed.UL, Research Institute for Medicines and Pharmaceutical Sciences, Faculty of Pharmacy, University of Lisbon, Av. Forcas Armadas, 1600-083 Lisbon, Portugal
| | - María do Carmo Carreiras
- Laboratorio de Radicales Libres y Química Computacional (IQOG, CSIC), Madrid, Spain, Departamento de Química Inorgánica y Química Técnica, Facultad de Ciencias, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain, and iMed.UL, Research Institute for Medicines and Pharmaceutical Sciences, Faculty of Pharmacy, University of Lisbon, Av. Forcas Armadas, 1600-083 Lisbon, Portugal
| | - Elena Soriano
- Laboratorio de Radicales Libres y Química Computacional (IQOG, CSIC), Madrid, Spain, Departamento de Química Inorgánica y Química Técnica, Facultad de Ciencias, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain, and iMed.UL, Research Institute for Medicines and Pharmaceutical Sciences, Faculty of Pharmacy, University of Lisbon, Av. Forcas Armadas, 1600-083 Lisbon, Portugal
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Päsha MA, Mahammed KA, Jayäshankara VP. LiBr‐Catalyzed Simple and Efficient Synthesis of Some Novel Substituted Quinolines via Friedlander Heteroannulation Reaction. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397910701575871] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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24
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Lee JH, Choi YH, Lim YJ, Lee BS, Chi DY, Jin C. Syntheses and binding affinities of 6-nitroquipazine analogues for serotonin transporter. Part 5: 2'-Substituted 6-nitroquipazines. Bioorg Med Chem 2007; 15:3499-504. [PMID: 17376695 DOI: 10.1016/j.bmc.2007.03.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Accepted: 03/01/2007] [Indexed: 12/01/2022]
Abstract
Five C2'-substituted 6-nitroquipazine (6-NQ) derivatives were prepared and evaluated in terms of their biological abilities (K(i)) to displace [(3)H]citalopram binding to serotonin transporter. The relationship between their structure and biological activities revealed that shorter alkyl groups tend to possess higher binding affinity. Both compounds 12a and 12c were found to have the equally highest binding affinity (K(i)=0.43+/-0.02 nM).
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Affiliation(s)
- Jae Hak Lee
- Department of Chemistry, Inha University, 253 Yonghyundong, Namgu, Inchon 402-751, Republic of Korea
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An Efficient and Rapid Approach to Quinolines via Friedländer Synthesis Catalyzed by Silica Gel Supported Sodium Hydrogen Sulfate Under Solvent-Free Conditions. MONATSHEFTE FUR CHEMIE 2007. [DOI: 10.1007/s00706-007-0678-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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26
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Zolfigol MA, Salehi P, Ghaderi A, Shiri M, Tanbakouchian Z. An eco-friendly procedure for the synthesis of polysubstituted quinolines under aqueous media. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.molcata.2006.06.031] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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27
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Sulfamic acid: an efficient, cost-effective and recyclable solid acid catalyst for the Friedlander quinoline synthesis. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.08.042] [Citation(s) in RCA: 142] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Kobayashi K, Miyamoto K, Morikawa O, Konishi H. Synthesis of Benzazetine Derivatives by Intramolecular Iodoamination ofo-(Acylamino)styrene Derivatives. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2005. [DOI: 10.1246/bcsj.78.886] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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29
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Theeraladanon C, Arisawa M, Nakagawa M, Nishida A. Total synthesis of (+)-(S)-angustureine and the determination of the absolute configuration of the natural product angustureine. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2004.12.022] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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30
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Kobayashi K, Takagoshi K, Kondo S, Morikawa O, Konishi H. An Efficient Synthesis of 2,4-Disubstituted Quinolines by Electrophile-Mediated Cyclization Reactions of 2-Isocyanostyrene Derivatives. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2004. [DOI: 10.1246/bcsj.77.553] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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31
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Palimkar SS, Siddiqui SA, Daniel T, Lahoti RJ, Srinivasan KV. Ionic Liquid-Promoted Regiospecific Friedlander Annulation: Novel Synthesis of Quinolines and Fused Polycyclic Quinolines. J Org Chem 2003; 68:9371-8. [PMID: 14629159 DOI: 10.1021/jo035153u] [Citation(s) in RCA: 248] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Several room-temperature ionic liquids (ILs) based on 1-butylimidazolium salts with varying anions were synthesized and evaluated for the preparation of biologically active substituted quinolines and fused polycyclic quinolines using the Friedlander heteroannulation reaction. On screening, 1-butylimidazolium tetrafluoroborate [Hbim]BF4 was found to be the best ionic liquid for the heteroannulation reaction, and the reasons to this effect are well explained. The reactions proceed very well under relatively mild conditions without any added catalyst. The IL acts as a promoter for this regiospecific synthesis and can be recycled. By this green approach, various quinolines were prepared in excellent yields and purity and well-characterized.
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Affiliation(s)
- Sanjay S Palimkar
- Division of Organic Chemistry, Technology, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
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O'Dell DK, Nicholas KM. Synthesis of 3-substituted quinolines via transition-metal-catalyzed reductive cyclization of o-nitro Baylis-Hillman acetates. J Org Chem 2003; 68:6427-30. [PMID: 12895081 DOI: 10.1021/jo034447c] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reductive cyclization of o-nitro-substituted Baylis-Hillman acetates by carbon monoxide, catalyzed by [CpFe(CO)(2)](2), gives moderate to good yields of 3-substituted quinolines.
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Affiliation(s)
- David K O'Dell
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, Oklahoma 73019, USA
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