1
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Inhibition of XPO-1 Mediated Nuclear Export through the Michael-Acceptor Character of Chalcones. Pharmaceuticals (Basel) 2021; 14:ph14111131. [PMID: 34832913 PMCID: PMC8621101 DOI: 10.3390/ph14111131] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/02/2021] [Accepted: 11/04/2021] [Indexed: 01/10/2023] Open
Abstract
The nuclear export receptor exportin-1 (XPO1, CRM1) mediates the nuclear export of proteins that contain a leucine-rich nuclear export signal (NES) towards the cytoplasm. XPO1 is considered a relevant target in different human diseases, particularly in hematological malignancies, tumor resistance, inflammation, neurodegeneration and viral infections. Thus, its pharmacological inhibition is of significant therapeutic interest. The best inhibitors described so far (leptomycin B and SINE compounds) interact with XPO1 through a covalent interaction with Cys528 located in the NES-binding cleft of XPO1. Based on the well-established feature of chalcone derivatives to react with thiol groups via hetero-Michael addition reactions, we have synthesized two series of chalcones. Their capacity to react with thiol groups was tested by incubation with GSH to afford the hetero-Michael adducts that evolved backwards to the initial chalcone through a retro-Michael reaction, supporting that the covalent interaction with thiols could be reversible. The chalcone derivatives were evaluated in antiproliferative assays against a panel of cancer cell lines and as XPO1 inhibitors, and a good correlation was observed with the results obtained in both assays. Moreover, no inhibition of the cargo export was observed when the two prototype chalcones 9 and 10 were tested against a XPO1-mutated Jurkat cell line (XPO1C528S), highlighting the importance of the Cys at the NES-binding cleft for inhibition. Finally, their interaction at the molecular level at the NES-binding cleft was studied by applying the computational tool CovDock.
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2
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Han XD, Peng GL, Wang HB, Wu L, Fu JP, Tang ZS, Hu JW, Xiong W. Novel synthesis of fused spiro piperidone-cyclopropanes from cyclopropyl amides and electron-deficient alkenes. Org Biomol Chem 2021; 19:3191-3198. [PMID: 33885573 DOI: 10.1039/d1ob00214g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here that a series of bridged O,O-ketal fused spiro piperidone-cyclopropane derivatives 3 can be constructed with excellent yields and good diastereoselectivity by the one-pot reaction of 1-acylcyclopropanecarboxamides 1 with electron-deficient alkene 2a (EWG = CHO) via the domino process involving [4 + 2] annulation/intermolecular electrophilic addition/intramolecular cyclization. Furthermore, reactions of 1 with 2b/2c (EWG = CN, COOMe), leading to spiro piperidone-cyclopropane derivatives 4 or 5 by base catalyst selection, were also presented.
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Affiliation(s)
- Xiao-Dan Han
- Department of Applied Chemistry, Jiang Xi Academic of Sciences, Nanchang, 330096, China.
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3
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Guranova N, Kantin G, Dar'in D, Krasavin M. Diazo Glutaconimides: an Unexplored Type of Heterocyclic α‐Diazocarbonyl Compounds Conveniently Evolved into Pyridine‐2,6(1
H
,3
H
)‐diones and Oxazolo[5,4‐
b
]pyridin‐5(4
H
)‐ones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Natalia Guranova
- Department of Natural Products Chemistry, Institute of Chemistry, Saint Petersburg State University 26 Universitetskii prospekt Peterhof 198504 Russian Federation
| | - Grigory Kantin
- Department of Natural Products Chemistry, Institute of Chemistry, Saint Petersburg State University 26 Universitetskii prospekt Peterhof 198504 Russian Federation
| | - Dmitry Dar'in
- Department of Natural Products Chemistry, Institute of Chemistry, Saint Petersburg State University 26 Universitetskii prospekt Peterhof 198504 Russian Federation
| | - Mikhail Krasavin
- Department of Natural Products Chemistry, Institute of Chemistry, Saint Petersburg State University 26 Universitetskii prospekt Peterhof 198504 Russian Federation
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4
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Wang J, Liu Y, Wei Z, Cao J, Liang D, Lin Y, Duan H. Synthesis of 4-Azaindolines Using Phase-Transfer Catalysis via an Intramolecular Mannich Reaction. J Org Chem 2020; 85:4047-4057. [PMID: 32130006 DOI: 10.1021/acs.joc.9b03025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of bifunctional asymmetric phase-transfer catalysts containing novel fluorine-containing urea groups derived from cinchona alkaloids have been synthesized and successfully applied in the asymmetric intramolecular Mannich reaction. The 4-azaindoline products bearing multiple substrates were obtained in excellent yield (90-99%), with high enantioselectivity (up to 95%) and diastereoselectivity (up to >99:1).
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Affiliation(s)
- Jingdong Wang
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Yuxin Liu
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Zhonglin Wei
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Jungang Cao
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Dapeng Liang
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Yingjie Lin
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Haifeng Duan
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
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5
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Kantin G, Dar'in D, Krasavin M. RhII
-Catalyzed Cycloaddition of α-Diazo Homophthalimides and Nitriles Delivers Oxazolo[5,4-c
]isoquinolin-5(4H
)-one Scaffold. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800955] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Grigory Kantin
- Saint Petersburg State University; 199034 Saint Petersburg Russian Federation
| | - Dmitry Dar'in
- Saint Petersburg State University; 199034 Saint Petersburg Russian Federation
| | - Mikhail Krasavin
- Saint Petersburg State University; 199034 Saint Petersburg Russian Federation
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6
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Zhang Z, Zheng D, Wan Y, Zhang G, Bi J, Liu Q, Liu T, Shi L. Selective Cleavage of Inert Aryl C-N Bonds in N-Aryl Amides. J Org Chem 2018; 83:1369-1376. [PMID: 29302966 DOI: 10.1021/acs.joc.7b02880] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A highly selective, IBX-promoted reaction has been developed for the oxidative cleavage of inert C(aryl)-N bonds on secondary amides while leaving the C(carbonyl)-N bond unchanged. This metal-free reaction proceeds under mild conditions (HFIP/H2O, 25 °C), providing facile access to various useful primary amides, some of which would be otherwise unattainable using conventional aminolysis and hydrolysis approaches.
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Affiliation(s)
- Zhiguo Zhang
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China.,Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University , Jilin, Changchun 130024, China
| | - Dan Zheng
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Yameng Wan
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Guisheng Zhang
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Jingjing Bi
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Qingfeng Liu
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Tongxin Liu
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Lei Shi
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
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7
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Lamb AD, Davey PD, Driver RW, Thompson A, Smith MD. Enantioselective Synthesis of 4- and 6-Azaindolines by a Cation-Directed Cyclization. Org Lett 2016; 18:5372-5375. [PMID: 27709963 PMCID: PMC5086784 DOI: 10.1021/acs.orglett.6b02744] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Indexed: 11/29/2022]
Abstract
Functionalized 4- and 6-azaindolines are accessible with high levels of enantioselectivity by the cation-directed cyclization of aminopyridine-derived imines via phase-transfer catalysis. The extension of this methodology to diastereoselective cyclizations is also described.
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Affiliation(s)
- Alan D. Lamb
- Chemistry
Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, U.K.
| | - Peter D. Davey
- Chemistry
Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, U.K.
| | - Russell W. Driver
- Chemistry
Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, U.K.
| | - Amber
L. Thompson
- Chemistry
Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, U.K.
| | - Martin D. Smith
- Chemistry
Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, U.K.
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8
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Haym I, Huynh THV, Hansen SW, Pedersen MHF, Ruiz JA, Erichsen MN, Gynther M, Bjørn-Yoshimoto WE, Abrahamsen B, Bastlund JF, Bundgaard C, Eriksen AL, Jensen AA, Bunch L. Bioavailability Studies and in vitro Profiling of the Selective Excitatory Amino Acid Transporter Subtype 1 (EAAT1) Inhibitor UCPH-102. ChemMedChem 2016; 11:403-19. [PMID: 26797816 DOI: 10.1002/cmdc.201500527] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Revised: 12/14/2015] [Indexed: 02/03/2023]
Abstract
Although the selective excitatory amino acid transporter subtype 1 (EAAT1) inhibitor UCPH-101 has become a standard pharmacological tool compound for in vitro and ex vivo studies in the EAAT research field, its inability to penetrate the blood-brain barrier makes it unsuitable for in vivo studies. In the present study, per os (p.o.) administration (40 mg kg(-1) ) of the closely related analogue UCPH-102 in rats yielded respective plasma and brain concentrations of 10.5 and 6.67 μm after 1 h. Three analogue series were designed and synthesized to improve the bioavailability profile of UCPH-102, but none displayed substantially improved properties in this respect. In vitro profiling of UCPH-102 (10 μm) at 51 central nervous system targets in radioligand binding assays strongly suggests that the compound is completely selective for EAAT1. Finally, in a rodent locomotor model, p.o. administration of UCPH-102 (20 mg kg(-1) ) did not induce acute effects or any visible changes in behavior.
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Affiliation(s)
- Isabell Haym
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, 2100, Copenhagen Ø, Denmark
| | - Tri H V Huynh
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, 2100, Copenhagen Ø, Denmark
| | - Stinne W Hansen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, 2100, Copenhagen Ø, Denmark
| | - Martin H F Pedersen
- Technical University of Denmark, Center for Nuclear Technologies, DTU Nutech/Hevesy Laboratory, Frederiksborgvej 399, Building 202, 4000, Roskilde, Denmark
| | - Josep A Ruiz
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, 2100, Copenhagen Ø, Denmark
| | - Mette N Erichsen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, 2100, Copenhagen Ø, Denmark
| | - Mikko Gynther
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Yliopistonranta 1C, 70211, Kuopio, Finland
| | - Walden E Bjørn-Yoshimoto
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, 2100, Copenhagen Ø, Denmark
| | - Bjarke Abrahamsen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, 2100, Copenhagen Ø, Denmark
| | | | | | - Anette L Eriksen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, 2100, Copenhagen Ø, Denmark
| | - Anders A Jensen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, 2100, Copenhagen Ø, Denmark
| | - Lennart Bunch
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, 2100, Copenhagen Ø, Denmark.
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9
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Nuhant P, Allais C, Chen MZ, Coe JW, Dermenci A, Fadeyi OO, Flick AC, Mousseau JJ. Access to Highly Substituted 7-Azaindoles from 2-Fluoropyridines via 7-Azaindoline Intermediates. Org Lett 2015; 17:4292-5. [DOI: 10.1021/acs.orglett.5b02098] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Philippe Nuhant
- Worldwide Medicinal Chemistry, Pfizer Inc., 445 Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Christophe Allais
- Worldwide Medicinal Chemistry, Pfizer Inc., 445 Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Ming Z. Chen
- Worldwide Medicinal Chemistry, Pfizer Inc., 445 Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Jotham W. Coe
- Worldwide Medicinal Chemistry, Pfizer Inc., 445 Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Alpay Dermenci
- Worldwide Medicinal Chemistry, Pfizer Inc., 445 Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Olugbeminiyi O. Fadeyi
- Worldwide Medicinal Chemistry, Pfizer Inc., 445 Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Andrew C. Flick
- Worldwide Medicinal Chemistry, Pfizer Inc., 445 Eastern
Point Road, Groton, Connecticut 06340, United States
| | - James J. Mousseau
- Worldwide Medicinal Chemistry, Pfizer Inc., 445 Eastern
Point Road, Groton, Connecticut 06340, United States
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10
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Zhu Y, Back TG. Preparation of 1,7- and 3,9-Dideazapurines from 2-Amino-3-iodo- and 3-Amino-4-iodopyridines and Activated Acetylenes by Conjugate Addition and Copper-Catalyzed Intramolecular Arylation. J Org Chem 2014; 79:11270-6. [DOI: 10.1021/jo502150v] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ying Zhu
- Department
of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, AB, Canada T2N 1N4
| | - Thomas G. Back
- Department
of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, AB, Canada T2N 1N4
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11
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Krasnokutskaya EA, Kassanova AZ, Estaeva MT, Filimonov VD. A new synthesis of pyridinyl trifluoromethanesulfonates via one-pot diazotization of aminopyridines in the presence of trifluoromethanesulfonic acid. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.052] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Huang H, Ji X, Wu W, Jiang H. A cascade approach to fused indolizinones through Lewis acid–copper(i) relay catalysis. Chem Commun (Camb) 2013; 49:3351-3. [DOI: 10.1039/c3cc40643a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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13
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Huang P, Zhang R, Liang Y, Dong D. [5C + 1N] annulations: two novel routes to substituted dihydrofuro[3,2-c]pyridines. Org Lett 2012; 14:5196-9. [PMID: 23025242 DOI: 10.1021/ol302314c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Two novel routes based on [5C + 1N] annulations for the synthesis of 2,3-dihydrofuro[3,2-c]pyridines are described. Ammonium acetate (NH(4)OAc) is used as an ammonia source in both routes. The first route utilizes 1-acyl-1-[(dimethylamino)alkenoyl]cyclopropanes as a five-carbon 1,5-bielectrophilic species and combines the [5C + 1N] annulation and regioselective ring-enlargement of cyclopropyl ketone into one pot, whereas the second route utilizes 3-acyl-2-[(dimethylamino)alkenyl]-4,5-dihydrofurans as the five-carbon synthons, which involves a sequential intermolecular aza-addition, intramolecular aza-nucleophilic addition/elimination, and dehydration reaction.
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Affiliation(s)
- Peng Huang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
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14
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15
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Z. Zard S, Bacqué E, El Qacémi M. A Flexible Convergent Route to Azaoxindoles, Azaindolines, Azaindoles, and Tetrahydroazaquinolones. HETEROCYCLES 2012. [DOI: 10.3987/com-11-s(p)24] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Huang P, Zhang N, Zhang R, Dong D. Vilsmeier-Type Reaction of Dimethylaminoalkenoyl Cyclopropanes: One-Pot Access to 2,3-Dihydrofuro [3,2-c]pyridin-4(5H)-ones. Org Lett 2011; 14:370-3. [DOI: 10.1021/ol203124f] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Peng Huang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Ning Zhang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Rui Zhang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Dewen Dong
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
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17
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Moustafa MMAR, Pagenkopf BL. Synthesis of 5-Azaindoles via a Cycloaddition Reaction between Nitriles and Donor−Acceptor Cyclopropanes. Org Lett 2010; 12:3168-71. [DOI: 10.1021/ol101078z] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Brian L. Pagenkopf
- Department of Chemistry, The University of Western Ontario, London, Ontario, N6A 5B7, Canada
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18
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Lewis acid-mediated reactions of 1-cyclopropyl-2-arylethanone derivatives with diethyl 2-oxomalonate and ethyl 2-oxoacetate. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Palladium-catalysed tandem alkenyl- and aryl-C–N bond formation: a cascade N-annulation route to 1-functionalised 7-azaindoles. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.08.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Attanasi OA, Gianfranco Favi, Giorgi G, Mantellini F, Karapetyan V, Langer P. Regioselective synthesis of spiro-cyclopropanated 1-aminopyrrol-2-ones by Bi(OTf)3-catalyzed one-pot ‘Mukaiyama–Michael addition/cyclization/ring-contraction’ reactions of 1,2-bis(trimethylsilyloxy)cyclobutene with 1,2-diaza-1,3-butadienes. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.04.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Discovery of α-amidosulfones as potent and selective agonists of CB2: Synthesis, SAR, and pharmacokinetic properties. Bioorg Med Chem Lett 2009; 19:31-5. [DOI: 10.1016/j.bmcl.2008.11.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Revised: 11/04/2008] [Accepted: 11/10/2008] [Indexed: 11/20/2022]
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22
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Mahiout Z, Lomberget T, Goncalves S, Barret R. Solvent-dependent oxidations of 5- and 6-azaindoles to trioxopyrrolopyridines and functionalised azaindoles. Org Biomol Chem 2008; 6:1364-76. [PMID: 18385843 DOI: 10.1039/b719776d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A regioselective synthesis of 4,7-dimethoxy 5- and 6-azaindoles 2 has been achieved, based on the appropriate choice of ortho-directing or ortho-repulsing groups in the formylation of a pyridine ring. Studies on the regioselectivity of the formylation step and on the preparation of azidoacrylate intermediates 4 are described in this paper. The reactivity of the 5- and 6-azaindole structures towards BBr3-mediated selective monodemethylation and oxidative demethylation reactions were also investigated. The regioselectivity of the deprotection was confirmed using a chemical approach. Oxidation reactions were then carried out on either dimethoxy- or hydroxymethoxyazaindoles, in different solvents, using [bis(trifluoroacetoxy)iodo]benzene. In acetonitrile-water, trioxopyrrolopyridines 12 were obtained, whereas the formation of functionalised azaindoles 17 was observed in acetonitrile-methanol. The tautomeric structure of the trioxopyrrolopyridines was proved by X-ray diffraction analysis.
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Affiliation(s)
- Zahia Mahiout
- Laboratoire de Chimie Thérapeutique, Université de Lyon, Lyon, F-69003, France
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23
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Parcerisa J, Romero M, Pujol MD. Synthesis of 2-substituted-7-azaindoles from 2-amino-3-picolin. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.11.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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Kobayashi K, Fujita S, Fukamachi S, Konishi H. Synthesis of 1-Aryl-1H-pyrrolo[2,3-b]pyridines (1-Aryl-7-azaindoles) by a Thermal Dehydration-Cyclization-Dehydrogenation Sequence of 2-Arylamino-3-(1-hydroxyalkyl)pyridines. HETEROCYCLES 2008. [DOI: 10.3987/com-08-11441] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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25
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Fang YQ, Yuen J, Lautens M. A general modular method of azaindole and thienopyrrole synthesis via Pd-catalyzed tandem couplings of gem-dichloroolefins. J Org Chem 2007; 72:5152-60. [PMID: 17559273 DOI: 10.1021/jo070460b] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A palladium-catalyzed reaction of gem-dichloroolefins and a boronic acid via a tandem intramolecular C-N and intermolecular Suzuki coupling process gave corresponding substituted azaindoles or thienopyrroles. This method is a very modular protocol to synthesize all four isomers of azaindole and two isomers of thienopyrroles in good to excellent yield.
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Affiliation(s)
- Yuan-Qing Fang
- Davenport Chemistry Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
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Zhang Z, Zhang Q, Sun S, Xiong T, Liu Q. Domino Ring-Opening/Recyclization Reactions of Doubly Activated Cyclopropanes as a Strategy for the Synthesis of Furoquinoline Derivatives. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604276] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Zhang Z, Zhang Q, Sun S, Xiong T, Liu Q. Domino Ring-Opening/Recyclization Reactions of Doubly Activated Cyclopropanes as a Strategy for the Synthesis of Furoquinoline Derivatives. Angew Chem Int Ed Engl 2007; 46:1726-9. [PMID: 17397086 DOI: 10.1002/anie.200604276] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhiguo Zhang
- Department of Chemistry, Northeast Normal University, Changchun, 130024, P.R. China
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