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Delgado F, Benítez A, Gotopo L, Romero AH. 4-Aminoquinoline: a comprehensive review of synthetic strategies. Front Chem 2025; 13:1553975. [PMID: 40291373 PMCID: PMC12023255 DOI: 10.3389/fchem.2025.1553975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2024] [Accepted: 03/05/2025] [Indexed: 04/30/2025] Open
Abstract
4-Aminoquinoline is an important scaffold due to its variety of applications in medicinal, synthetic organic, and industrial chemistry. It has gained great relevance for the development of selective and potent leishmanicidal agents targeting parasite mitochondria, agonists and antagonists of Toll-like receptors (TLRs), antimalarials, and anticancer agents. As a consequence of the importance of 4-aminoquinoline as leishmanicidal, the present mini-review article aims to give comprehensive information about the different synthetic alternatives for the synthesis of 4-aminoquinolines, including (i) reactions based on nucleophilic aromatic substitution via conventional heating, microwave, and ultrasound; (ii) one-pot metal-free or metal-catalyzed reactions of inter- and intramolecular cyclization/annulation; (iii) miscellaneous reactions including the dehydrogenative amination of dihydroquinolin-4(1H)one and amination via Hartwig-Buchwald cross-coupling or rearrangement reactions.
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Affiliation(s)
- Francisco Delgado
- Grupo de Química Orgánica Medicinal, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
- Laboratorio de Biología Redox de Tripanosomatidos, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Andrés Benítez
- Grupo de Química Orgánica Medicinal, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Lourdes Gotopo
- Laboratorio de Síntesis Orgánica, Escuela de Química, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela
| | - Angel H. Romero
- Grupo de Química Orgánica Medicinal, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
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2
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Chen F, Geng H, Li C, Wang J, Guo B, Tang L, Yang YY. Aerobic Dehydrogenative Aromatization in the Preparation of 4-Aminoquinoline Derivatives by Synergistic Pd/Cu Catalysis. J Org Chem 2023; 88:15589-15596. [PMID: 37931324 DOI: 10.1021/acs.joc.3c01400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
The 4-aminoquinoline moiety is widely present in various bioactive compounds and marketed drugs, while the preparation of this target structure relies heavily on the amination of 4-chloroquinolines. Herein, an atom and step economic procedure was developed based on an aerobic dehydrogenative aromatization strategy. Unlike the well-known palladium-catalyzed dehydrogenative aromatization of cyclohexanones with amines, synergistic Pd/Cu catalysis is crucial for 2,3-dihydroquinolin-4(1H)-one type of substrates. Under the optimized conditions, a range of aromatic/aliphatic amines and 2,3-dihydroquinolin-4(1H)-ones were coupled to give the corresponding 4-aminoquinoline products in moderate to high yields, and the application of the current methodology for the preparation and late-stage diversification of marketed drugs was also demonstrated.
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Affiliation(s)
- Fei Chen
- School of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, 550014 Guiyang, P. R. China
| | - Huidan Geng
- School of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, 550014 Guiyang, P. R. China
| | - Chun Li
- School of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, 550014 Guiyang, P. R. China
| | - Jianta Wang
- School of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, 550014 Guiyang, P. R. China
| | - Bing Guo
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, 550004 Guiyang, P. R. China
| | - Lei Tang
- School of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, 550014 Guiyang, P. R. China
| | - Yuan-Yong Yang
- School of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, 550014 Guiyang, P. R. China
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3
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Silva VLM, Pinto DCGA, Santos CMM, Rocha DHA. 15.4.5 Quinolinones and Related Systems (Update 2022). KNOWLEDGE UPDATES 2022/3 2022. [DOI: 10.1055/sos-sd-115-01218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2025]
Abstract
AbstractQuinolinones, of which the quinolin-4(1H)-one ring system can be highlighted, represent an exciting class of nitrogen heterocycles. The quinolinone motif can be found in many natural compounds and approved drugs for several diseases. This chapter is a comprehensive survey of the methods for the synthesis of quinolin-2(1H)-ones, quinolin-4(1H)-ones, and their thio- and amino derivatives, and is an update to the previous Science of Synthesis chapter (Section 15.4), covering the period between 2003 and 2020.
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4
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Collet JW, Roose TR, Weijers B, Maes BUW, Ruijter E, Orru RVA. Recent Advances in Palladium-Catalyzed Isocyanide Insertions. Molecules 2020; 25:E4906. [PMID: 33114013 PMCID: PMC7660339 DOI: 10.3390/molecules25214906] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/19/2020] [Accepted: 10/20/2020] [Indexed: 12/17/2022] Open
Abstract
Isocyanides have long been known as versatile chemical reagents in organic synthesis. Their ambivalent nature also allows them to function as a CO-substitute in palladium-catalyzed cross couplings. Over the past decades, isocyanides have emerged as practical and versatile C1 building blocks, whose inherent N-substitution allows for the rapid incorporation of nitrogeneous fragments in a wide variety of products. Recent developments in palladium catalyzed isocyanide insertion reactions have significantly expanded the scope and applicability of these imidoylative cross-couplings. This review highlights the advances made in this field over the past eight years.
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Affiliation(s)
- Jurriën W. Collet
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (J.W.C.); (T.R.R.); (B.W.)
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Thomas R. Roose
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (J.W.C.); (T.R.R.); (B.W.)
| | - Bram Weijers
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (J.W.C.); (T.R.R.); (B.W.)
| | - Bert U. W. Maes
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Eelco Ruijter
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (J.W.C.); (T.R.R.); (B.W.)
| | - Romano V. A. Orru
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (J.W.C.); (T.R.R.); (B.W.)
- Organic Chemistry, Aachen-Maastricht Institute for Biobased Materials, Maastricht University, Urmonderlaan 22, 6167 RD Geleen, The Netherlands
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5
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Liang YX, Yang M, He BW, Zhao YL. Silver-Catalyzed Cascade Cyclization Reaction of Isocyanides with Sulfoxonium Ylides: Synthesis of 3-Aminofurans and 4-Aminoquinolines. Org Lett 2020; 22:7640-7644. [DOI: 10.1021/acs.orglett.0c02835] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yong-Xin Liang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Ming Yang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Bo-Wen He
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yu-Long Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
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Hao W, Wang Y, Miao J, Liu Y. Metal‐Free Selective C2‐H Amidation of 8‐Amidoquinolines by Using Isocyanide as the Source of Amide. ChemistrySelect 2018. [DOI: 10.1002/slct.201800647] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Wenyan Hao
- College of chemistry & Chemical engineeringJiangxi Normal University Nanchang 330022 People's Republic of China
| | - Yuyun Wang
- College of chemistry & Chemical engineeringJiangxi Normal University Nanchang 330022 People's Republic of China
| | - Jiankang Miao
- College of chemistry & Chemical engineeringJiangxi Normal University Nanchang 330022 People's Republic of China
| | - Yunyun Liu
- College of chemistry & Chemical engineeringJiangxi Normal University Nanchang 330022 People's Republic of China
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Collet JW, Ackermans K, Lambregts J, Maes BUW, Orru RVA, Ruijter E. Modular Three-Component Synthesis of 4-Aminoquinolines via an Imidoylative Sonogashira/Cyclization Cascade. J Org Chem 2018; 83:854-861. [PMID: 29260564 PMCID: PMC5778392 DOI: 10.1021/acs.joc.7b02844] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We developed a one-pot, two-stage synthetic route to substituted 4-aminoquinolines involving an imidoylative Sonogashira coupling followed by acid-mediated cyclization. This three-component reaction affords pharmaceutically valuable 4-aminoquinolines in a one-pot procedure from readily available starting materials. The reaction tolerates various substituents on the arene as well as the use of secondary and even primary isocyanides. Additionally, the wide tolerance for functionalized isocyanides allows for the one-pot synthesis of various substituted chloroquine analogues as well as other medicinally relevant products.
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Affiliation(s)
- Jurriën W Collet
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam , De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Kelly Ackermans
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam , De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Jeffrey Lambregts
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam , De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Bert U W Maes
- Organic Synthesis, Department of Chemistry, University of Antwerp , Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Romano V A Orru
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam , De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Eelco Ruijter
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam , De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
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8
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Tereniak SJ, Stahl SS. Mechanistic Basis for Efficient, Site-Selective, Aerobic Catalytic Turnover in Pd-Catalyzed C-H Imidoylation of Heterocycle-Containing Molecules. J Am Chem Soc 2017; 139:14533-14541. [PMID: 28942639 PMCID: PMC5902801 DOI: 10.1021/jacs.7b07359] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A recently reported Pd-catalyzed method for oxidative imidoylation of C-H bonds exhibits unique features that have important implications for Pd-catalyzed aerobic oxidation catalysis: (1) The reaction tolerates heterocycles that commonly poison Pd catalysts. (2) The site selectivity of C-H activation is controlled by an N-methoxyamide group rather than a suitably positioned heterocycle. (3) A Pd0 source, Pd2(dba)3 (dba = dibenzylideneacetone), is superior to Pd(OAc)2 as a precatalyst, and other PdII sources are ineffective. (4) The reaction performs better with air, rather than pure O2. The present study elucidates the origin of these features. Kinetic, mechanistic, and in situ spectroscopic studies establish that PdII-mediated C-H activation is the turnover-limiting step. The tBuNC substrate is shown to coordinate more strongly to PdII than pyridine, thereby contributing to the lack of heterocycle catalyst poisoning. A well-defined PdII-peroxo complex is a competent intermediate that promotes substrate coordination via proton-coupled ligand exchange. The effectiveness of this substrate coordination step correlates with the basicity of the anionic ligands coordinated to PdII, and Pd0 catalyst precursors are most effective because they selectively afford the PdII-peroxo in situ. Finally, elevated O2 pressures are shown to contribute to background oxidation of the isonitrile, thereby explaining the improved performance of reactions conducted with air rather than 1 atm O2. These collective results explain the unique features of the aerobic C-H imidoylation of N-methoxybenzamides and have important implications for other Pd-catalyzed aerobic C-H oxidation reactions.
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Affiliation(s)
- Stephen J. Tereniak
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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9
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Hao W, Tian J, Li W, Shi R, Huang Z, Lei A. Nickel-Catalyzed Oxidative C−H/N−H Isocyanide Insertion: An Efficient Synthesis of Iminoisoindolinone Derivatives. Chem Asian J 2016; 11:1664-7. [DOI: 10.1002/asia.201600193] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 03/25/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Wenyan Hao
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 People's Republic of China
| | - Jun Tian
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies; Wuhan University; Wuhan, Hebei 430072 People's Republic of China
| | - Wu Li
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies; Wuhan University; Wuhan, Hebei 430072 People's Republic of China
| | - Renyi Shi
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies; Wuhan University; Wuhan, Hebei 430072 People's Republic of China
| | - Zhiliang Huang
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies; Wuhan University; Wuhan, Hebei 430072 People's Republic of China
| | - Aiwen Lei
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 People's Republic of China
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies; Wuhan University; Wuhan, Hebei 430072 People's Republic of China
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10
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Wezeman T, Zhong S, Nieger M, Bräse S. Synthesis of Highly Functionalized 4-Aminoquinolines. Angew Chem Int Ed Engl 2016; 55:3823-7. [PMID: 26878996 DOI: 10.1002/anie.201511385] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Indexed: 11/12/2022]
Abstract
A diverse set of highly substituted 4-aminoquinolines was synthesized from ynamides, triflic anhydride, 2-chloropyridine, and readily accessible amides in a mild one-step procedure.
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Affiliation(s)
- Tim Wezeman
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany
| | - Sabilla Zhong
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany
| | - Martin Nieger
- Laboratory of Inorganic Chemistry, University of Helsinki, Finland
| | - Stefan Bräse
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany. .,Institute of Toxicology and Genetics (ITG), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
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11
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Wezeman T, Zhong S, Nieger M, Bräse S. Synthese hochfunktionalisierter 4-Aminochinoline. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511385] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tim Wezeman
- Institut für Organische Chemie (IOC); Karlsruher Institut für Technologie (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
| | - Sabilla Zhong
- Institut für Organische Chemie (IOC); Karlsruher Institut für Technologie (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
| | - Martin Nieger
- Laboratory of Inorganic Chemistry; University of Helsinki; Finnland
| | - Stefan Bräse
- Institut für Organische Chemie (IOC); Karlsruher Institut für Technologie (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
- Institut für Toxikologie und Genetik (ITG); Karlsruher Institut für Technologie (KIT); Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Deutschland
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12
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Boyarskiy VP, Bokach NA, Luzyanin KV, Kukushkin VY. Metal-Mediated and Metal-Catalyzed Reactions of Isocyanides. Chem Rev 2015; 115:2698-779. [DOI: 10.1021/cr500380d] [Citation(s) in RCA: 388] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Vadim P. Boyarskiy
- Institute of Chemistry, Saint Petersburg State University, 198504 Stary Petergof, Russian Federation
| | - Nadezhda A. Bokach
- Institute of Chemistry, Saint Petersburg State University, 198504 Stary Petergof, Russian Federation
| | - Konstantin V. Luzyanin
- Institute of Chemistry, Saint Petersburg State University, 198504 Stary Petergof, Russian Federation
| | - Vadim Yu. Kukushkin
- Institute of Chemistry, Saint Petersburg State University, 198504 Stary Petergof, Russian Federation
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Prasad B, Nallapati SB, Kolli SK, Sharma AK, Yellanki S, Medisetti R, Kulkarni P, Sripelly S, Mukkanti K, Pal M. Pd-catalyzed isocyanide insertion/nucleophilic attack by indole C-3/desulfonylation in the same pot: a direct access to indoloquinolines of pharmacological interest. RSC Adv 2015. [DOI: 10.1039/c5ra13535d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A Pd-catalyzed new cascade reaction furnished indoloquinolin based small molecules as potential cytotoxic agents.
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Affiliation(s)
- Bagineni Prasad
- Dr Reddy's Institute of Life Sciences
- University of Hyderabad Campus
- Hyderabad 500 046
- India
| | - Suresh Babu Nallapati
- Dr Reddy's Institute of Life Sciences
- University of Hyderabad Campus
- Hyderabad 500 046
- India
- Institute of Science and Technology
| | - Sunder Kumar Kolli
- Dr Reddy's Institute of Life Sciences
- University of Hyderabad Campus
- Hyderabad 500 046
- India
| | | | - Swapna Yellanki
- Dr Reddy's Institute of Life Sciences
- University of Hyderabad Campus
- Hyderabad 500 046
- India
- Zephase Therapeutics (an incubated company at the DRILS)
| | - Raghavender Medisetti
- Dr Reddy's Institute of Life Sciences
- University of Hyderabad Campus
- Hyderabad 500 046
- India
- Zephase Therapeutics (an incubated company at the DRILS)
| | - Pushkar Kulkarni
- Dr Reddy's Institute of Life Sciences
- University of Hyderabad Campus
- Hyderabad 500 046
- India
- Zephase Therapeutics (an incubated company at the DRILS)
| | - S. Sripelly
- Dr Reddy's Institute of Life Sciences
- University of Hyderabad Campus
- Hyderabad 500 046
- India
| | - K. Mukkanti
- Institute of Science and Technology
- JNT University Hyderabad
- Hyderabad-500085
- India
| | - Manojit Pal
- Dr Reddy's Institute of Life Sciences
- University of Hyderabad Campus
- Hyderabad 500 046
- India
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14
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Vlaar T, Bensch L, Kraakman J, Vande Velde CML, Maes BUW, Orru RVA, Ruijter E. Synthesis of Diverse Azolo[c]quinazolines by Palladium(II)- Catalyzed Aerobic Oxidative Insertion of Isocyanides. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201301129] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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15
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Estévez V, Van Baelen G, Lentferink BH, Vlaar T, Janssen E, Maes BUW, Orru RVA, Ruijter E. Synthesis of Pyridopyrimidines by Palladium-Catalyzed Isocyanide Insertion. ACS Catal 2013. [DOI: 10.1021/cs400926z] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Verónica Estévez
- Department of Chemistry & Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Gitte Van Baelen
- Department of Chemistry & Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Babette H. Lentferink
- Department of Chemistry & Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Tjøstil Vlaar
- Department of Chemistry & Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Elwin Janssen
- Department of Chemistry & Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Bert U. W. Maes
- Organic
Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan
171, B-2020, Antwerp, Belgium
| | - Romano V. A. Orru
- Department of Chemistry & Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Eelco Ruijter
- Department of Chemistry & Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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16
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Vlaar T, Orru RVA, Maes BUW, Ruijter E. Palladium-catalyzed synthesis of 2-aminobenzoxazinones by aerobic oxidative coupling of anthranilic acids and isocyanides. J Org Chem 2013; 78:10469-75. [PMID: 24063265 DOI: 10.1021/jo401924h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Isocyanides have emerged as valuable C1 building blocks in palladium catalysis. Their potential has, however, mainly been exploited for the synthesis of amidines and amidine-containing heterocycles. To illustrate the broader applicability of isocyanides, we have recently developed a novel oxidative coupling of diamines and isocyanides furnishing valuable guanidine-containing heterocycles. We here report the extension of this protocol to the coupling of anthranilic acids and isocyanides leading to medicinally relevant 2-aminobenzoxazinones. This is a particularly challenging substrate class for this reaction due to the possibility of undesired decarboxylative pathways and the susceptibility of the products to nucleophilic attack. Therefore, this work underlines the generality and broad potential of the oxidative coupling of bisnucleophiles and isocyanides, facilitating the further implementation of this chemistry in library design.
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Affiliation(s)
- Tjøstil Vlaar
- Department of Chemistry & Pharmaceutical Sciences and Amsterdam Institute for Molecules Medicines and Systems (AIMMS), VU University Amsterdam , De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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