1
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Jannapu Reddy R, Sharadha N, Haritha Kumari A. Base-mediated [3 + 2]-cycloannulation strategy for the synthesis of pyrazolo[1,5- a]pyridine derivatives using ( E)-β-iodovinyl sulfones. Org Biomol Chem 2022; 20:4331-4337. [PMID: 35451451 DOI: 10.1039/d2ob00499b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pyrazolo[1,5-a]pyridines continue to occupy a special place in medicinal chemistry, but the direct construction of 3-sulfonyl analogues remains unexplored. Under basic conditions, pyridinium-N-amine and the corresponding dipolar aminide played a vibrant role in [3 + 2]-cycloaddition using (E)-β-iodovinyl sulfones. K2CO3-mediated tandem cycloannulative-desulfonylation of (E)-β-iodovinyl sulfones with 1-aminopyridinium iodide is realized to access 2-substituted pyrazolo[1,5-a]pyridines in good to high yields. An essential modification of the dipolar N-tosylpyridinium imide allows the first preparative synthesis of 3-sulfonyl-pyrazolo[1,5-a]pyridines in moderate to high yields. Of note, the metal-free protocol features a broad substrate scope with good functional group tolerance and compatibility. The efficacy of the process was proved with gram-scale reactions, and a plausible mechanism is also presented based on concrete results.
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Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India.
| | - Nunavath Sharadha
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India.
| | - Arram Haritha Kumari
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India.
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2
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Odin IS, Chertov AY, Grigor'eva OB, Golovanov AA. Ketone Derivatives of Propargylamines as Synthetic Equivalents of Conjugated 2,4,1-Enynones in the Synthesis of Acetylenic 2-Pyrazolines and Pyrazoles. J Org Chem 2022; 87:5916-5924. [PMID: 35394780 DOI: 10.1021/acs.joc.2c00198] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An interaction of 1,5-diaryl-3-X-pent-4-yn-1-ones (where X stands for piperidin-1-yl, morpholin-4-yl, 4-methylpiperazin-1-yl) with arylhydrazines proceeds at room temperature and results in 3-aryl-5-arylethynyl-1-phenyl-4,5-dihydro-1H-pyrazoles with up to 57-73% yields. Under similar conditions, the cyclocondensation of conjugated 2,4,1-enynones with arylhydrazine proceeds only in the presence of cyclic amines. 1,5-Diaryl-3-X-pent-4-yn-1-ones are reported as synthetic equivalents of conjugated 2,4,1-enynones in reactions with arylhydrazines. On the basis of obtained data, there are highly efficient methods developed for the synthesis of 5-arylethynyl-substituted 4,5-dihydro-1H-pyrazoles, as well as for similarly structured 1H-pyrazoles prepared by oxidation in AcOH. Presented products possess quite marked fluorescent abilities. Emission maximum wavelengths are located at 453-465 and 363-400 nm, respectively; certain compounds show extremely large Stokes shifts that may reach 91,000 cm-1.
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Affiliation(s)
- Ivan S Odin
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Anton Yu Chertov
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Olga B Grigor'eva
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
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3
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Motornov VA, Tabolin AA, Nelyubina YV, Nenajdenko VG, Ioffe SL. Copper-mediated oxidative [3 + 2]-annulation of nitroalkenes and pyridinium imines: efficient synthesis of 3-fluoro- and 3-nitro-pyrazolo[1,5-a]pyridines. Org Biomol Chem 2020; 18:1436-1448. [PMID: 32022079 DOI: 10.1039/c9ob02668a] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An efficient route to pyrazolo[1,5-a]pyridines by Cu(OAc)2-promoted oxidative [3 + 2]-annulation of nitroalkenes with in situ generated pyridinium imines is developed. The reaction with α-fluoronitroalkenes enables the first preparative synthesis of 3-fluoro-pyrazolo[1,5-a]pyridines. Cycloaddition with α-unsubstituted nitroalkenes provides access to 3-nitro-pyrazolo[1,5-a]pyridines in excellent yields. A broad transformation scope was demonstrated. Both electron-rich and electron-deficient nitroalkenes as well as different aminopyridinium salts can be used for the assembly of the target pyrazolo[1,5-a]pyridines. The related aza-heterocycles, namely, pyrazolo[1,5-a]pyrazines and pyrazolo[1,5-b]pyridazines, were successfully prepared via the present methodology. The possible mechanism of the reaction is discussed.
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Affiliation(s)
- Vladimir A Motornov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prosp. 47, Moscow, 119991, Russia. and Higher Chemical College, D. I. Mendeleev University of Chemical Technology of Russia, Miusskaya sq. 9, Moscow, 125047, Russia
| | - Andrey A Tabolin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prosp. 47, Moscow, 119991, Russia.
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str. 28, Moscow, 119991, Russia
| | - Valentine G Nenajdenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russia
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prosp. 47, Moscow, 119991, Russia.
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4
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Tran C, Lefèvre G, Haddad M, Ratovelomanana-Vidal V. Unexpected formation of 2-alkynylpyridines from iodo-selenopyridines by selective activation of C Se over C I bonds. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.105757] [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] Open
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5
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Hyodo K, Hasegawa G, Oishi N, Kuroda K, Uchida K. Direct and Catalytic Amide Synthesis from Ketones via Transoximation and Beckmann Rearrangement under Mild Conditions. J Org Chem 2018; 83:13080-13087. [DOI: 10.1021/acs.joc.8b01810] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kengo Hyodo
- Department of Material Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu, Shiga 520-2194, Japan
| | - Genna Hasegawa
- Department of Material Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu, Shiga 520-2194, Japan
| | - Naoki Oishi
- Department of Material Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu, Shiga 520-2194, Japan
| | - Kazuma Kuroda
- Department of Material Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu, Shiga 520-2194, Japan
| | - Kingo Uchida
- Department of Material Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu, Shiga 520-2194, Japan
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6
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Xu B, Han J, Wang L. Metal- and Base-Free Direct N-Arylation of Pyridazinones by Using Diaryliodonium Salts: An Anion Effect. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800268] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Bowen Xu
- Key Laboratory for Advanced Materials, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 P. R. China
| | - Jianwei Han
- Key Laboratory for Advanced Materials, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 P. R. China
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis; Shanghai Institute of Organic Chemistry, The Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Limin Wang
- Key Laboratory for Advanced Materials, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 P. R. China
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7
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Vorob’ev AY, Supranovich VI, Borodkin GI, Shubin VG. New approach toward the synthesis of deuterated pyrazolo[1,5- a]pyridines and 1,2,4-triazolo[1,5- a]pyridines. Beilstein J Org Chem 2017; 13:800-805. [PMID: 28546837 PMCID: PMC5433178 DOI: 10.3762/bjoc.13.80] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 04/09/2017] [Indexed: 11/23/2022] Open
Abstract
An efficient and operationally simple synthesis of 7-deuteropyrazolo[1,5-a]pyridine and 7-deutero-1,2,4-triazolo[1,5-a]pyridine derivatives using α-H/D exchange of 1-aminopyridinium cations in basic D2O followed by a 1,3-cycloaddition of acetylenes and nitriles is presented. A high regioselectivity and a high degree of deuterium incorporation were achieved. The procedure was applied for several 4-R-1-aminopyridinium cations (R = H, Me, OMe).
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Affiliation(s)
- Aleksey Yu Vorob’ev
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Acad. Lavrentiev Ave. 9, Novosibirsk, 630090, Russia
- Novosibirsk State University, Pirogov st. 2, Novosibirsk, 630090, Russia
| | - Vyacheslav I Supranovich
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Acad. Lavrentiev Ave. 9, Novosibirsk, 630090, Russia
- Novosibirsk State University, Pirogov st. 2, Novosibirsk, 630090, Russia
| | - Gennady I Borodkin
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Acad. Lavrentiev Ave. 9, Novosibirsk, 630090, Russia
- Novosibirsk State University, Pirogov st. 2, Novosibirsk, 630090, Russia
| | - Vyacheslav G Shubin
- Vorozhtsov Novosibirsk Institute of Organic Chemistry, Acad. Lavrentiev Ave. 9, Novosibirsk, 630090, Russia
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8
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Cao X, Chen Y, Zhang Y, Lan Y, Zhang J, Xu X, Qiu Y, Zhao S, Liu X, Liu BF, Zhang G. Synthesis and Biological Evaluation of Novel σ1 Receptor Ligands for Treating Neuropathic Pain: 6-Hydroxypyridazinones. J Med Chem 2016; 59:2942-61. [DOI: 10.1021/acs.jmedchem.5b01416] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xudong Cao
- Systems
Biology Theme, Department of Biomedical Engineering, College of Life
Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yin Chen
- Jiangsu Nhwa Pharmaceutical Co., Ltd., 69 Democratic South Road, Xuzhou, Jiangsu 221116, China
| | - Yifang Zhang
- Systems
Biology Theme, Department of Biomedical Engineering, College of Life
Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yu Lan
- Systems
Biology Theme, Department of Biomedical Engineering, College of Life
Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Juecheng Zhang
- Systems
Biology Theme, Department of Biomedical Engineering, College of Life
Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xiangqing Xu
- Jiangsu Nhwa Pharmaceutical Co., Ltd., 69 Democratic South Road, Xuzhou, Jiangsu 221116, China
| | - Yinli Qiu
- Jiangsu Nhwa Pharmaceutical Co., Ltd., 69 Democratic South Road, Xuzhou, Jiangsu 221116, China
| | - Song Zhao
- Jiangsu Nhwa Pharmaceutical Co., Ltd., 69 Democratic South Road, Xuzhou, Jiangsu 221116, China
| | - Xin Liu
- Systems
Biology Theme, Department of Biomedical Engineering, College of Life
Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Bi-Feng Liu
- Systems
Biology Theme, Department of Biomedical Engineering, College of Life
Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Guisen Zhang
- Systems
Biology Theme, Department of Biomedical Engineering, College of Life
Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
- Jiangsu Nhwa Pharmaceutical Co., Ltd., 69 Democratic South Road, Xuzhou, Jiangsu 221116, China
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9
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Ravi C, Chandra Mohan D, Naresh Kumar Reddy N, Adimurthy S. Substrate selective synthesis of pyrazolo[1,5-a]pyridines through [3 + 2] cycloaddition of N-aminopyridines and β-nitro styrenes. RSC Adv 2015. [DOI: 10.1039/c5ra06707c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Synthesis of 2 or 3-(hetero)aryl pyrazolo[1,5-a]pyridines through [3 + 2] cycloaddition ofN-aminopyridine with β-nitrostyrenes followed byin situdenitration under metal-free and mild conditions are described.
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Affiliation(s)
- Chitrakar Ravi
- Academy of Scientific & Innovative Research
- CSIR – Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
| | - Darapaneni Chandra Mohan
- Academy of Scientific & Innovative Research
- CSIR – Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
| | - N. Naresh Kumar Reddy
- Academy of Scientific & Innovative Research
- CSIR – Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research
- CSIR – Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
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10
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Mohan DC, Ravi C, Rao SN, Adimurthy S. Copper-mediated synthesis of pyrazolo[1,5-a]pyridines through oxidative linkage of C–C/N–N bonds. Org Biomol Chem 2015; 13:3556-60. [DOI: 10.1039/c5ob00018a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Copper-mediated synthesis of pyrazolo[1,5-a]pyridine-3-carboxylates through oxidative linkage of C–C and N–N bonds under mild reaction conditions with broad substrate scope is described.
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Affiliation(s)
- Darapaneni Chandra Mohan
- Academy of Scientific & Innovative Research
- CSIR–Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
| | - Chitrakar Ravi
- Academy of Scientific & Innovative Research
- CSIR–Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
| | - Sadu Nageswara Rao
- Academy of Scientific & Innovative Research
- CSIR–Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research
- CSIR–Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
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11
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Unexpected cleavage of the Cpy–Cpy bond in the reaction of 2,2′-bipyridine N,N′-diimines with acetylenes. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.08.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Li M, Zhao BX. Progress of the synthesis of condensed pyrazole derivatives (from 2010 to mid-2013). Eur J Med Chem 2014; 85:311-40. [PMID: 25104650 DOI: 10.1016/j.ejmech.2014.07.102] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 07/25/2014] [Accepted: 07/26/2014] [Indexed: 01/08/2023]
Abstract
Condensed pyrazole derivatives are important heterocyclic compounds due to their excellent biological activities and have been widely applied in pharmaceutical and agromedical fields. In recent years, numerous condensed pyrazole derivatives have been synthesized and advanced to clinic studies with various biological activities. In this review, we summarized the reported synthesis methods of condensed pyrazole derivatives from 2010 until now. All compounds are divided into three parts according to the rings connected to pyrazole-ring, i.e. [5, 5], [5,F 6], and [5, 7]-condensed pyrazole derivatives. The biological activities and applications in pharmaceutical fields are briefly introduced to offer an orientation for the design and synthesis of condensed pyrazole derivatives with good biological activities.
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Affiliation(s)
- Meng Li
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
| | - Bao-Xiang Zhao
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China.
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13
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El Bakouri O, Cassú D, Solà M, Parella T, Pla-Quintana A, Roglans A. A new mild synthetic route to N-arylated pyridazinones from aryldiazonium salts. Chem Commun (Camb) 2014; 50:8073-6. [DOI: 10.1039/c4cc03190c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mild method to synthesise N-arylated pyridazinones is described and its mechanism unravelled by DFT calculations and experimental techniques.
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Affiliation(s)
- Ouissam El Bakouri
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química
- Universitat de Girona
- E-17071 Girona, Spain
| | - Daniel Cassú
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química
- Universitat de Girona
- E-17071 Girona, Spain
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química
- Universitat de Girona
- E-17071 Girona, Spain
| | - Teodor Parella
- Servei de RMN and Departament de Química
- Universitat Autònoma de Barcelona
- E-08193 Bellaterra (Barcelona), Spain
| | - Anna Pla-Quintana
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química
- Universitat de Girona
- E-17071 Girona, Spain
| | - Anna Roglans
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química
- Universitat de Girona
- E-17071 Girona, Spain
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14
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Liang L, Yang G, Wang W, Xu F, Niu Y, Sun Q, Xu P. A Copper-Catalyzed Aerobic Cascade Dehydrogenative- Dehalogenative Reaction. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300026] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Hoashi Y, Takai T, Kotani E, Koike T. Synthesis of pyrazolo[1,5-a]pyridines by thermal intramolecular cyclization. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.02.078] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Zhou W, Zhong G, Rao X, Xie H, Zeng S, Chi T, Zou L, Wu D, Hu W. Identification of aminopyridazine-derived antineuroinflammatory agents effective in an Alzheimer's mouse model. ACS Med Chem Lett 2012; 3:903-7. [PMID: 24900405 DOI: 10.1021/ml3001769] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 09/03/2012] [Indexed: 11/28/2022] Open
Abstract
Targeting neuroinflammation may be a new strategy to combat Alzheimer's disease. An aminopyridazine 1b previously reported as a novel antineuroinflammatory agent was considered to have a potential therapeutic effect for Alzheimer's disease. In this study, we further explored the chemical space to identify more potent antineuroinflammatory agents and validate their in vivo efficacy in an animal model. Compound 14 was finally identified as an effective agent with comparable in vivo efficacy to the marketed drug donepezil in counteracting spatial learning and working memory impairment in an Aβ-induced Alzheimer's mouse model.
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Affiliation(s)
- Wei Zhou
- Guangzhou Institutes of Biomedicine
and Health, Chinese Academy of Sciences, Guangzhou 510530, People's Republic of China
| | - Guifa Zhong
- Guangzhou Institutes of Biomedicine
and Health, Chinese Academy of Sciences, Guangzhou 510530, People's Republic of China
| | - Xiurong Rao
- Guangzhou Institutes of Biomedicine
and Health, Chinese Academy of Sciences, Guangzhou 510530, People's Republic of China
| | - Hui Xie
- Guangzhou Institutes of Biomedicine
and Health, Chinese Academy of Sciences, Guangzhou 510530, People's Republic of China
| | - Shaogao Zeng
- Guangzhou Institutes of Biomedicine
and Health, Chinese Academy of Sciences, Guangzhou 510530, People's Republic of China
| | - Tianyan Chi
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016,
People's Republic of China
| | - Libo Zou
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016,
People's Republic of China
| | - Donghai Wu
- Guangzhou Institutes of Biomedicine
and Health, Chinese Academy of Sciences, Guangzhou 510530, People's Republic of China
| | - Wenhui Hu
- Guangzhou Institutes of Biomedicine
and Health, Chinese Academy of Sciences, Guangzhou 510530, People's Republic of China
- State Key Laboratory of Respiratory Disease, Guangzhou 510120, People's Republic
of China
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17
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Wu XF, Neumann H, Neumann S, Beller M. Palladium-Catalyzed Synthesis of Phthalazinones: Efficient Carbonylative Coupling of 2-Bromobenzaldehydes and Hydrazines. Chemistry 2012; 18:8596-9. [DOI: 10.1002/chem.201200267] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 04/29/2012] [Indexed: 11/08/2022]
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18
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Ochiai K, Takita S, Eiraku T, Kojima A, Iwase K, Kishi T, Fukuchi K, Yasue T, Adams DR, Allcock RW, Jiang Z, Kohno Y. Phosphodiesterase inhibitors. Part 3: Design, synthesis and structure–activity relationships of dual PDE3/4-inhibitory fused bicyclic heteroaromatic-dihydropyridazinones with anti-inflammatory and bronchodilatory activity. Bioorg Med Chem 2012; 20:1644-58. [DOI: 10.1016/j.bmc.2012.01.033] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 01/19/2012] [Accepted: 01/19/2012] [Indexed: 11/24/2022]
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19
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Mousseau JJ, Bull JA, Ladd CL, Fortier A, Sustac Roman D, Charette AB. Synthesis of 2- and 2,3-Substituted Pyrazolo[1,5-a]pyridines: Scope and Mechanistic Considerations of a Domino Direct Alkynylation and Cyclization of N-Iminopyridinium Ylides Using Alkenyl Bromides, Alkenyl Iodides, and Alkynes. J Org Chem 2011; 76:8243-61. [DOI: 10.1021/jo201303x] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- James J. Mousseau
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec, Canada H3C 3J7
| | - James A. Bull
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec, Canada H3C 3J7
| | - Carolyn L. Ladd
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec, Canada H3C 3J7
| | - Angélique Fortier
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec, Canada H3C 3J7
| | - Daniela Sustac Roman
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec, Canada H3C 3J7
| | - André B. Charette
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec, Canada H3C 3J7
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20
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Verhelst T, Maes J, Liu Z, Sergeyev S, Maes BUW. Synthesis of functionalized pyridazin-3(2H)-ones via selective bromine-magnesium exchange and lactam directed ortho C-H magnesiation. J Org Chem 2011; 76:6670-7. [PMID: 21732644 DOI: 10.1021/jo201009m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Selective bromine-magnesium exchange on 2-benzyl-5-bromo-4-methoxypyridazin-3(2H)-one could be achieved when MesMgBr was used as reagent. With more nucleophilic RMgCl species (R = Bu, i-Pr, Ph) both nucleophilic addition-elimination at C-4 and bromine-magnesium exchange at C-5 occurred. In 2-benzyl-5-bromopyridazin-3(2H)-one, which does not contain a substituent at C-4, addition could not be suppressed. Less nucleophilic Mg amides (TMPMgCl·LiCl) allowed regioselective C-H magnesiation at the C-4 position in such substrates, as exemplified for 2-benzyl-5-chloro- and 2-benzyl-6-chloropyridazin-3(2H)-one. Quenching of the magnesiated pyridazinones with electrophiles gives access to a variety of hitherto unknown pyridazin-3(2H)-one derivatives.
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Affiliation(s)
- Tom Verhelst
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
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Allcock RW, Blakli H, Jiang Z, Johnston KA, Morgan KM, Rosair GM, Iwase K, Kohno Y, Adams DR. Phosphodiesterase inhibitors. Part 1: Synthesis and structure-activity relationships of pyrazolopyridine-pyridazinone PDE inhibitors developed from ibudilast. Bioorg Med Chem Lett 2011; 21:3307-12. [PMID: 21530250 DOI: 10.1016/j.bmcl.2011.04.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 04/02/2011] [Accepted: 04/06/2011] [Indexed: 11/18/2022]
Abstract
Ibudilast [1-(2-isopropylpyrazolo[1,5-a]pyridin-3-yl)-2-methylpropan-1-one] is a nonselective phosphodiesterase inhibitor used clinically to treat asthma. Efforts to selectively develop the PDE3- and PDE4-inhibitory activity of ibudilast led to replacement of the isopropyl ketone by a pyridazinone heterocycle. Structure-activity relationship exploration in the resulting 6-(pyrazolo[1,5-a]pyridin-3-yl)pyridazin-3(2H)-ones revealed that the pyridazinone lactam functionality is a critical determinant for PDE3-inhibitory activity, with the nitrogen preferably unsubstituted. PDE4 inhibition is strongly promoted by introduction of a hydrophobic substituent at the pyridazinone N(2) centre and a methoxy group at C-7' in the pyrazolopyridine. Migration of the pyridazinone ring connection from the pyrazolopyridine 3'-centre to C-4' strongly enhances PDE4 inhibition. These studies establish a basis for development of potent PDE4-selective and dual PDE3/4-selective inhibitors derived from ibudilast.
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Affiliation(s)
- Robert W Allcock
- Chemistry Department, School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, United Kingdom
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22
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Day JP, Lindsay B, Riddell T, Jiang Z, Allcock RW, Abraham A, Sookup S, Christian F, Bogum J, Martin EK, Rae RL, Anthony D, Rosair GM, Houslay DM, Huston E, Baillie GS, Klussmann E, Houslay MD, Adams DR. Elucidation of a Structural Basis for the Inhibitor-Driven, p62 (SQSTM1)-Dependent Intracellular Redistribution of cAMP Phosphodiesterase-4A4 (PDE4A4). J Med Chem 2011; 54:3331-47. [DOI: 10.1021/jm200070e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jonathan P. Day
- Molecular Pharmacology Group, Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Barbara Lindsay
- Department of Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton Campus, Edinburgh EH14 4AS, U.K
| | - Tracy Riddell
- Molecular Pharmacology Group, Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Zhong Jiang
- Department of Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton Campus, Edinburgh EH14 4AS, U.K
| | - Robert W. Allcock
- Department of Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton Campus, Edinburgh EH14 4AS, U.K
| | - Achamma Abraham
- Department of Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton Campus, Edinburgh EH14 4AS, U.K
| | - Sebastian Sookup
- Molecular Pharmacology Group, Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Frank Christian
- Molecular Pharmacology Group, Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Jana Bogum
- Max-Delbrück-Centrum für Molekulare Medizin (MDC), Berlin-Buch, Robert-Rössle-Strasse 10, 13125 Berlin, Germany
| | - Elisabeth K. Martin
- Department of Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton Campus, Edinburgh EH14 4AS, U.K
| | - Robert L. Rae
- Department of Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton Campus, Edinburgh EH14 4AS, U.K
| | - Diana Anthony
- Molecular Pharmacology Group, Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Georgina M. Rosair
- Department of Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton Campus, Edinburgh EH14 4AS, U.K
| | - Daniel M. Houslay
- Molecular Pharmacology Group, Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Elaine Huston
- Molecular Pharmacology Group, Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K
| | - George S. Baillie
- Molecular Pharmacology Group, Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Enno Klussmann
- Max-Delbrück-Centrum für Molekulare Medizin (MDC), Berlin-Buch, Robert-Rössle-Strasse 10, 13125 Berlin, Germany
| | - Miles D. Houslay
- Molecular Pharmacology Group, Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K
| | - David R. Adams
- Department of Chemistry, School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton Campus, Edinburgh EH14 4AS, U.K
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Shiozaki M, Maeda K, Miura T, Kotoku M, Yamasaki T, Matsuda I, Aoki K, Yasue K, Imai H, Ubukata M, Suma A, Yokota M, Hotta T, Tanaka M, Hase Y, Haas J, Fryer AM, Laird ER, Littmann NM, Andrews SW, Josey JA, Mimura T, Shinozaki Y, Yoshiuchi H, Inaba T. Discovery of (1S,2R,3R)-2,3-Dimethyl-2-phenyl-1-sulfamidocyclopropanecarboxylates: Novel and Highly Selective Aggrecanase Inhibitors. J Med Chem 2011; 54:2839-63. [DOI: 10.1021/jm101609j] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Makoto Shiozaki
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Katsuya Maeda
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Tomoya Miura
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Masayuki Kotoku
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Takayuki Yamasaki
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Isamu Matsuda
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Kenta Aoki
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Katsutaka Yasue
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Hiroto Imai
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Minoru Ubukata
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Akira Suma
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Masahiro Yokota
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Takahiro Hotta
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Masahiro Tanaka
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Yasunori Hase
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Julia Haas
- Array BioPharma Inc., 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Andrew M. Fryer
- Array BioPharma Inc., 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Ellen R. Laird
- Array BioPharma Inc., 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Nicole M. Littmann
- Array BioPharma Inc., 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Steven W. Andrews
- Array BioPharma Inc., 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - John A. Josey
- Array BioPharma Inc., 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Takayuki Mimura
- Biological Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Yuichi Shinozaki
- Biological Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Hiromi Yoshiuchi
- Biological Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Takashi Inaba
- Chemical Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
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Verhelst T, Verbeeck S, Ryabtsova O, Depraetere S, Maes BUW. Synthesis of functionalized pyridazin-3(2H)-ones via nucleophilic substitution of hydrogen (SNH). Org Lett 2011; 13:272-5. [PMID: 21138319 DOI: 10.1021/ol102703w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reaction of 2-benzyl-5-halopyridazin-3(2H)-ones (3) with Grignard reagents followed by quenching with electrophiles unexpectedly yielded 4,5-disubstituted pyridazin-3(2H)-ones instead of 5-substituted pyridazin-3(2H)-ones. These reactions represent the first examples of cine substitution in which the anionic σ(H)-adduct is quenched by electrophiles (other than a proton) before elimination takes place. Insight into the reaction mechanism led to the direct transformation of 2-benzylpyridazin-3(2H)-one (7) and 2-benzyl-6-chloropyridazin-3(2H)-one (9) into the corresponding C-4 alkyl and aryl derivatives (when Br(2) was used as the electrophile).
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Affiliation(s)
- Tom Verhelst
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
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Wan W, Hou J, Jiang H, Wang Y, Zhu S, Deng H, Hao J. Concise synthesis of ω-fluoroalkylated ketoesters. A building block for the synthesis of six-, seven-, and eight-membered fluoroalkyl substituted 1,2-diaza-3-one heterocycles. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.03.029] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Yet L. Chapter 5.4: Five-Membered Ring Systems: With More than One N Atom. PROGRESS IN HETEROCYCLIC CHEMISTRY 2009. [DOI: 10.1016/s0959-6380(09)70035-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Hopper DW, Crombie AL, Clemens JJ, Kwon S. Chapter 6.1: Six-Membered Ring Systems: Pyridine and Benzo Derivatives. PROGRESS IN HETEROCYCLIC CHEMISTRY 2009. [DOI: 10.1016/s0959-6380(09)70039-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Manlove A, Groziak MP. Chapter 6.2: Six-Membered Ring Systems: Diazines and Benzo Derivatives. PROGRESS IN HETEROCYCLIC CHEMISTRY 2009. [DOI: 10.1016/s0959-6380(09)70040-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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