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Wu WQ, Qin HL. Synthesis of Pyrazolo[1,5- a]pyridinyl, Pyrazolo[1,5- a]quinolinyl, and Pyrazolo[5,1- a]isoquinolinyl Sulfonyl Fluorides via a [3 + 2] Annulation. J Org Chem 2023. [PMID: 36797220 DOI: 10.1021/acs.joc.2c02242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
A [3 + 2] cycloaddition reaction of N-aminopyridines, N-aminoquinolines, and N-aminoisoquinolines with 1-bromoethene-1-sulfonyl fluoride (BESF) was performed to obtain optimum yields of various useful pyrazolo[1,5-a]pyridinyl, pyrazolo[1,5-a]quinolinyl, and pyrazolo[5,1-a]isoquinolinyl sulfonyl fluorides (43-90% yield). The transformation process showed broad substrate specificity, mild reaction conditions, and operational simplicity. Therefore, the reaction has great applicable value in the field of medicinal chemistry and other disciplines.
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Affiliation(s)
- Wen-Qian Wu
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, P. R. China
| | - Hua-Li Qin
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, P. R. China
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2
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Philippov I, Gatilov Y, Sonina A, Vorob’ev A. Oxidative [3+2]Cycloaddition of Alkynylphosphonates with Heterocyclic N-Imines: Synthesis of Pyrazolo[1,5- a]Pyridine-3-phosphonates. Molecules 2022; 27:molecules27227913. [PMID: 36432015 PMCID: PMC9694626 DOI: 10.3390/molecules27227913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/01/2022] [Accepted: 11/04/2022] [Indexed: 11/19/2022] Open
Abstract
A series of pyrazolo[1,5-a]pyridine-3-ylphosphonates were prepared with moderate to good yields by the oxidative [3+2]cycloaddition of 2-subtituted ethynylphosphonates with in situ generated pyridinium-N-imines and their annulated analogs. 2-Aliphatic and 2-Ph acetylenes demonstrate low activity, and the corresponding pyrazolopyridines were achieved with a moderate yield in the presence of 10 mol% Fe(NO3)3·9H2O. At the same time, tetraethyl ethynylbisphosphonate, diethyl 2-TMS- and 2-OPh-ethynylphosphonates possess much greater reactivity and the corresponding pyrazolo[1,5-a]pyridines, and their annulated derivatives were obtained with good to excellent yields without any catalyst. 2-Halogenated ethynylphosphonates also readily reacted with pyridinium-N-imines, forming complex mixtures containing poor amounts of 2-halogenated pyrazolopyridines.
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Affiliation(s)
- Igor Philippov
- Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Avenue, 630090 Novosibirsk, Russia
| | - Yuriy Gatilov
- Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Avenue, 630090 Novosibirsk, Russia
| | - Alina Sonina
- Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Avenue, 630090 Novosibirsk, Russia
| | - Aleksey Vorob’ev
- Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Avenue, 630090 Novosibirsk, Russia
- Department of Natural Science, Faculty of Organic Chemistry, Novosibirsk State University, 1 Pirogova Street, 630090 Novosibirsk, Russia
- Correspondence: ; Tel.: +7-952-9488714
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3
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Ravindar L, Hasbullah SA, Hassan NI, Qin HL. Cross‐Coupling of C‐H and N‐H Bonds: a Hydrogen Evolution Strategy for the Construction of C‐N Bonds. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lekkala Ravindar
- Universiti Kebangsaan Malaysia Fakulti Teknologi dan Sains Maklumat Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Siti Aishah Hasbullah
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Nurul Izzaty Hassan
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Hua-Li Qin
- Wuhan University of Technology School of Chemistry 430070 Hubei CHINA
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4
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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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5
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Wang A, Liu YZ, Shen Z, Qiao Z, Ma X. Regioselective Synthesis of Pyrazolo[1,5- a]pyridine via TEMPO-Mediated [3 + 2] Annulation-Aromatization of N-Aminopyridines and α,β-Unsaturated Compounds. Org Lett 2022; 24:1454-1459. [PMID: 35166547 DOI: 10.1021/acs.orglett.2c00035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A TEMPO-mediated [3 + 2] annulation-aromatization protocol for the preparation of pyrazolo[1,5-a]pyridines from N-aminopyridines and α,β-unsaturated compounds was developed. The procedure offered multisubstituted pyrazolo[1,5-a]pyridines in good to excellent yield with high and predictable regioselectivity. The modification of marketed drugs including Loratadine, Abiraterone, and Metochalcone, and a one-pot three-step gram scale synthesis of key intermediate for the preparation of Selpercatinib were demonstrated. Mechanism studies show that TEMPO serves both as a Lewis acid and as an oxidant.
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Affiliation(s)
- Amu Wang
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Ya-Zhou Liu
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
| | - Zhongke Shen
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zeen Qiao
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
| | - Xiaofeng Ma
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
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Surya Prakash Rao H, Gunasundari R, Muthukumaran J. Crystal structure analysis of ethyl 6-(4-meth-oxy-phen-yl)-1-methyl-4-methyl-sulfanyl-3-phenyl-1 H-pyrazolo-[3,4- b]pyridine-5-carboxyl-ate. Acta Crystallogr E Crystallogr Commun 2020; 76:1209-1212. [PMID: 32844001 PMCID: PMC7405588 DOI: 10.1107/s2056989020008841] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 06/30/2020] [Indexed: 11/10/2022]
Abstract
In the title compound, C24H23N3O3S, the dihedral angle between the fused pyrazole and pyridine rings is 1.76 (7)°. The benzene and meth-oxy phenyl rings make dihedral angles of 44.8 (5) and 63.86 (5)°, respectively, with the pyrazolo-[3,4-b] pyridine moiety. An intra-molecular short S⋯O contact [3.215 (2) Å] is observed. The crystal packing features C-H⋯π inter-actions.
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Affiliation(s)
- H. Surya Prakash Rao
- Department of Chemistry and Biochemistry, School of Basic Sciences and Research, Sharda University, Greater Noida 201306, India
- Department of Chemistry, Pondicherry University, Puducherry 605 014, India
| | | | - Jayaraman Muthukumaran
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida 201306, India
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7
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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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8
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Rao HSP, Gunasundari R, Muthukumaran J. Crystal structure analysis of ethyl 3-(4-chloro-phen-yl)-1,6-dimethyl-4-methyl-sulfanyl-1 H-pyrazolo[3,4- b]pyridine-5-carboxyl-ate. Acta Crystallogr E Crystallogr Commun 2020; 76:443-445. [PMID: 32148891 PMCID: PMC7057362 DOI: 10.1107/s2056989020002479] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 02/20/2020] [Indexed: 11/13/2022]
Abstract
In the title compound, C18H18ClN3O2S, the dihedral angle between the fused pyrazole and pyridine rings is 3.81 (9)°. The benzene ring forms dihedral angles of 35.08 (10) and 36.26 (9)° with the pyrazole and pyridine rings, respectively. In the crystal, weak C-H⋯O hydrogen bonds connect mol-ecules along [100].
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Affiliation(s)
- H. Surya Prakash Rao
- Department of Chemistry and Biochemistry, School of Basic Sciences and Research, Sharda University, Greater Noida 201306, India
- Department of Chemistry, Pondicherry University, Puducherry 605014, India
| | | | - Jayaraman Muthukumaran
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida 201306, India
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9
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Kumar R, Ravi C, Joshi A, Semwal R, Adimurthy S. Catalyst‐free Azo‐arylation of Arenes/Heteroarenes at Room Temperature. ChemistrySelect 2019. [DOI: 10.1002/slct.201901308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Rahul Kumar
- Natural Products and Green Chemistry DivisionAcademy of Scientific & Innovative ResearchCSIR–Central Salt & Marine Chemicals Research Institute, G.B. Marg Bhavnagar- 364 002. Gujarat INDIA
| | - Chitrakar Ravi
- Natural Products and Green Chemistry DivisionAcademy of Scientific & Innovative ResearchCSIR–Central Salt & Marine Chemicals Research Institute, G.B. Marg Bhavnagar- 364 002. Gujarat INDIA
| | - Abhisek Joshi
- Natural Products and Green Chemistry DivisionAcademy of Scientific & Innovative ResearchCSIR–Central Salt & Marine Chemicals Research Institute, G.B. Marg Bhavnagar- 364 002. Gujarat INDIA
| | - Rashmi Semwal
- Natural Products and Green Chemistry DivisionAcademy of Scientific & Innovative ResearchCSIR–Central Salt & Marine Chemicals Research Institute, G.B. Marg Bhavnagar- 364 002. Gujarat INDIA
| | - Subbarayappa Adimurthy
- Natural Products and Green Chemistry DivisionAcademy of Scientific & Innovative ResearchCSIR–Central Salt & Marine Chemicals Research Institute, G.B. Marg Bhavnagar- 364 002. Gujarat INDIA
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10
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Synthesis of pyrazolo- and [1,2,4]triazolo-[1,5-а]quinolin-9-ols by cycloaddition to 8-hydroxyquinoline N-imide. Chem Heterocycl Compd (N Y) 2019. [DOI: 10.1007/s10593-019-02446-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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11
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Abdelmoniem AM, Ghozlan SAS, Abdelmoniem DM, Elwahy AHM, Abdelhamid IA. 3‐Amino‐5‐cyanomethylpyrazole‐4‐carbonitrile: Versatile Reagent for Novel Bis(pyrazolo[1,5‐a]pyridine) Derivativesviaa Multicomponent Reaction. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3346] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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12
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Ghozlan SA, Abdelmoniem DM, Hassaneen HM, Abdelmoniem AM, Abdelhamid IA. Cyclic Enaminone Incorporating 5-cyanomethylpyrazole-4-carbonitrile: Unexpected Formation of Pyrazolo[l,5- a]pyridine Derivatives. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Said A.S. Ghozlan
- Department of Chemistry, Faculty of Science; Cairo University; Giza 12613 Egypt
| | - Doaa M. Abdelmoniem
- Department of Chemistry, Faculty of Science; Cairo University; Giza 12613 Egypt
| | - Hamdi M. Hassaneen
- Department of Chemistry, Faculty of Science; Cairo University; Giza 12613 Egypt
| | - Amr M. Abdelmoniem
- Department of Chemistry, Faculty of Science; Cairo University; Giza 12613 Egypt
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13
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Li C, Zhang F. Convenient Synthesis of Spirooxindole-Fused Pyrazolopyridine Derivatives. ChemistrySelect 2018. [DOI: 10.1002/slct.201702942] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chunmei Li
- School of Chemistry and Chemical Engineering; Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; Shaoxing, Zhejiang Province 312000 China
| | - Furen Zhang
- School of Chemistry and Chemical Engineering; Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; Shaoxing, Zhejiang Province 312000 China
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Reddy NN, Nageswara Rao S, Ravi C, Adimurthy S. Catalyst-Free Synthesis of 2,4-Disubstituted-1 H-imidazoles through [3 + 2] Cyclization of Vinyl Azides with Amidines. ACS OMEGA 2017; 2:5235-5241. [PMID: 31457795 PMCID: PMC6641739 DOI: 10.1021/acsomega.7b00969] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 08/17/2017] [Indexed: 06/10/2023]
Abstract
A facile and efficient route for the synthesis of 2,4-disubstituted imidazoles from benzimidamides and vinyl azides through [3 + 2] cyclization under catalyst-free conditions has been described. The method is compatible for a broad range of functional groups with good to excellent yields.
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15
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Samanta S, Ravi C, Rao SN, Joshi A, Adimurthy S. Visible-light-promoted selective C–H amination of heteroarenes with heteroaromatic amines under metal-free conditions. Org Biomol Chem 2017; 15:9590-9594. [DOI: 10.1039/c7ob02504a] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The regioselective C–H amination of quinoline amides (C5) and imidazopyridines (C3) under transition-metal-free conditions at room temperature with a high degree of functional group tolerance is reported.
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Affiliation(s)
- Supravat Samanta
- 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
| | - Abhisek Joshi
- 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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