1
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Saha P, Kumar R, Das S, Ansari T, Indra A, Sharma DK. Visible light induced regioselective C-3 thiocyanation of imidazoheterocycles through naphthalimide dye based photoredox catalysis. Org Biomol Chem 2023; 21:8471-8476. [PMID: 37843304 DOI: 10.1039/d3ob01100c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
A visible light induced C-3 thiocyanation of imidazo[1,2-a]pyridines by using a naphthalimide based photoredox catalyst has been reported. Tolerance of electron withdrawing and donating groups at different positions of the imidazo[1,2-a]pyridine ring led to a wide substrate accessibility of this method. This methodology is further reproducible with other heterocycles like benzo[d]imidazo[2,1-b]thiazoles, indoles, azaindoles, and anilines.
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Affiliation(s)
- Pallavi Saha
- Department of Pharmaceutical Engineering and Technology, IIT-Banaras Hindu University, Varanasi, UP, 221005, India.
| | - Rohit Kumar
- Department of Pharmaceutical Engineering and Technology, IIT-Banaras Hindu University, Varanasi, UP, 221005, India.
| | - Samarpita Das
- Department of Pharmaceutical Engineering and Technology, IIT-Banaras Hindu University, Varanasi, UP, 221005, India.
| | - Toufik Ansari
- Department of Chemistry, IIT-Banaras Hindu University, Varanasi, UP, 221005, India
| | - Arindam Indra
- Department of Chemistry, IIT-Banaras Hindu University, Varanasi, UP, 221005, India
| | - Deepak K Sharma
- Department of Pharmaceutical Engineering and Technology, IIT-Banaras Hindu University, Varanasi, UP, 221005, India.
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2
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Tali JA, Kumar G, Sharma BK, Rasool Y, Sharma Y, Shankar R. Synthesis and site selective C-H functionalization of imidazo-[1,2- a]pyridines. Org Biomol Chem 2023; 21:7267-7289. [PMID: 37655687 DOI: 10.1039/d3ob00849e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Imidazo[1,2-a]pyridine has attracted much interest in drug development because of its potent medicinal properties, therefore the discovery of novel methods for its synthesis and functionalization continues to be an exciting area of research. Although transition metal catalysis has fuelled the most significant developments, extremely beneficial metal-free approaches have also been identified. Even though pertinent reviews focused on imidazo[1,2-a]pyridine synthesis, properties (physicochemical and medicinal), and functionalization at the C3 position have been published, none of these reviews has focused on the outcomes obtained in the field of global ring functionalization. We wish here to describe a brief synthesis and an overview of all the functionalization reactions at each carbon atom, viz, C2, C3, C5, C6, C7 and C8 of this scaffold, divided into sections based on site-selectivity and the type of functionalization methods used.
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Affiliation(s)
- Javeed Ahmad Tali
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Gulshan Kumar
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Bhupesh Kumar Sharma
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Younis Rasool
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Yashika Sharma
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
| | - Ravi Shankar
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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3
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Doraghi F, Mohaghegh F, Qareaghaj OH, Larijani B, Mahdavi M. Synthesis of N-, O-, and S-heterocycles from aryl/alkyl alkynyl aldehydes. RSC Adv 2023; 13:13947-13970. [PMID: 37181524 PMCID: PMC10167737 DOI: 10.1039/d3ra01778h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 04/26/2023] [Indexed: 05/16/2023] Open
Abstract
In the field of heterocyclic synthesis, alkynyl aldehydes serve as privileged reagents for cyclization reactions with other organic compounds to construct a broad spectrum of N-, O-, and S-heterocycles. Due to the immense application of heterocyclic molecules in pharmaceuticals, natural products, and material chemistry, the synthesis of such scaffolds has received wide attention. The transformations occurred under metal-catalyzed, metal-free-promoted, and visible-light-mediated systems. The present review article highlights the progress made in this field over the past two decades.
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Affiliation(s)
- Fatemeh Doraghi
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences Tehran Iran
| | - Farid Mohaghegh
- School of Chemistry, College of Science, University of Tehran Tehran Iran
| | | | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences Tehran Iran
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences Tehran Iran
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4
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Synthesis of Diversified Pyrazolo[3,4-b]pyridine Frameworks from 5-Aminopyrazoles and Alkynyl Aldehydes via Switchable C≡C Bond Activation Approaches. Molecules 2022; 27:molecules27196381. [PMID: 36234926 PMCID: PMC9571537 DOI: 10.3390/molecules27196381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 09/24/2022] [Accepted: 09/25/2022] [Indexed: 11/17/2022] Open
Abstract
A cascade 6-endo-dig cyclization reaction was developed for the switchable synthesis of halogen and non-halogen-functionalized pyrazolo[3,4-b]pyridines from 5-aminopyrazoles and alkynyl aldehydes via C≡C bond activation with silver, iodine, or NBS. In addition to its wide substrate scope, the reaction showed good functional group tolerance as well as excellent regional selectivity. This new protocol manipulated three natural products, and the arylation, alkynylation, alkenylation, and selenization of iodine-functionalized products. These reactions demonstrated the potential applications of this new method.
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5
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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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6
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Ramarao S, Pothireddy M, Venkateshwarlu R, Moturu KMVR, Siddaiah V, Kapavarapu R, Dandela R, Pal M. Sonochemical Synthesis and In Silico Evaluation of Imidazo[1,2- a]Pyridine Derivatives as Potential Inhibitors of Sirtuins. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2077774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Sidda Ramarao
- Department of Organic Chemistry & FDW, Andhra University, Visakhapatnam, Andhra Pradesh, India
| | - Mohanreddy Pothireddy
- Department of Industrial and Engineering Chemistry, Institute of Chemical Technology, Indianoil Odisha Campus, Bhubaneswar, India
| | - Rapolu Venkateshwarlu
- Department of Organic Chemistry & FDW, Andhra University, Visakhapatnam, Andhra Pradesh, India
| | | | - Vidavalur Siddaiah
- Department of Organic Chemistry & FDW, Andhra University, Visakhapatnam, Andhra Pradesh, India
| | | | - Rambabu Dandela
- Department of Industrial and Engineering Chemistry, Institute of Chemical Technology, Indianoil Odisha Campus, Bhubaneswar, India
| | - Manojit Pal
- Dr. Reddy’s Institute of Life Sciences, University of Hyderabad Campus, Hyderabad, India
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7
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Filippov IP, Agafonova AV, Titov GD, Smetanin IA, Rostovskii NV, Khlebnikov AF, Novikov MS. Synthesis of Imidazo[1,2- a]pyridines via Near UV Light-Induced Cyclization of Azirinylpyridinium Salts. J Org Chem 2022; 87:6514-6519. [PMID: 35476415 DOI: 10.1021/acs.joc.2c00514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient one-pot synthesis of imidazo[1,2-a]pyridines from 2-bromoazirines and pyridines has been developed. The construction of the bicyclic framework of imidazo[1,2-a]pyridines occurs in two steps through the formation of (2H-azirin-2-yl)pyridinium bromides followed by dehydrobrominative UV light-induced cyclization. The method can also be applied for the synthesis of imidazo[2,1-a]isoquinolines. Unstable in solution, (2H-azirin-2-yl)pyridinium/isoquinolinium bromides were quantitatively converted to stable tetrafluoroborates, which can be cyclized to imidazo[1,2-a]pyridines under UV irradiation in the presence of bromide ions.
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Affiliation(s)
- Ilya P Filippov
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Anastasiya V Agafonova
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Gleb D Titov
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Ilia A Smetanin
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Nikolai V Rostovskii
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Alexander F Khlebnikov
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Mikhail S Novikov
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
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8
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Panda J, Raiguru BP, Mishra M, Mohapatra S, Nayak S. Recent Advances in the Synthesis of Imidazo[1,2‐
a
]pyridines: A Brief Review. ChemistrySelect 2022. [DOI: 10.1002/slct.202103987] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jasmine Panda
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Bishnu P. Raiguru
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Mitali Mishra
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Seetaram Mohapatra
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Sabita Nayak
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
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9
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Kurteva V. Recent Progress in Metal-Free Direct Synthesis of Imidazo[1,2- a]pyridines. ACS OMEGA 2021; 6:35173-35185. [PMID: 34984250 PMCID: PMC8717391 DOI: 10.1021/acsomega.1c03476] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 11/30/2021] [Indexed: 06/14/2023]
Abstract
This Mini-Review highlights the most effective protocols for metal-free direct synthesis of imidazo[1,2-a]pyridines, crucial target products and key intermediates, developed in the past decade. The emphases is given on the ecological impact of the methods and on the mechanistic aspects as well. The procedures efficiently applied in the preparation of important drugs and promising drug candidates are also underlined.
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Affiliation(s)
- Vanya Kurteva
- Institute of Organic Chemistry
with Centre of Phytochemistry, Bulgarian
Academy of Sciences, Acad. G. Bonchev str., bl. 9, 1113 Sofia, Bulgaria
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10
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Kushch SO, Goryaeva MV, Surnina EA, Burgart YV, Ezhikova MA, Kodess MI, Slepukhin PA, Saloutin VI. Multicomponent Domino Reactions for the Synthesis of Variable Hydrogenated Imidazo[1,2‐
a
]pyridines. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Svetlana O. Kushch
- Postovsky Institute of Organic Synthesis, Ural Branch Russian Academy of Sciences S. Kovalevskoy St., 22 Ekaterinburg 620108 Russia
| | - Marina V. Goryaeva
- Postovsky Institute of Organic Synthesis, Ural Branch Russian Academy of Sciences S. Kovalevskoy St., 22 Ekaterinburg 620108 Russia
| | - Elena A. Surnina
- Postovsky Institute of Organic Synthesis, Ural Branch Russian Academy of Sciences S. Kovalevskoy St., 22 Ekaterinburg 620108 Russia
| | - Yanina V. Burgart
- Postovsky Institute of Organic Synthesis, Ural Branch Russian Academy of Sciences S. Kovalevskoy St., 22 Ekaterinburg 620108 Russia
| | - Marina A. Ezhikova
- Postovsky Institute of Organic Synthesis, Ural Branch Russian Academy of Sciences S. Kovalevskoy St., 22 Ekaterinburg 620108 Russia
| | - Mikhail I. Kodess
- Postovsky Institute of Organic Synthesis, Ural Branch Russian Academy of Sciences S. Kovalevskoy St., 22 Ekaterinburg 620108 Russia
| | - Pavel A. Slepukhin
- Postovsky Institute of Organic Synthesis, Ural Branch Russian Academy of Sciences S. Kovalevskoy St., 22 Ekaterinburg 620108 Russia
| | - Victor I. Saloutin
- Postovsky Institute of Organic Synthesis, Ural Branch Russian Academy of Sciences S. Kovalevskoy St., 22 Ekaterinburg 620108 Russia
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11
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Banerjee B, Priya A, Sharma A, Kaur G, Kaur M. Sulfonated β-cyclodextrins: efficient supramolecular organocatalysts for diverse organic transformations. PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2021-0080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Abstract
The present review summarizes various organic transformations carried out by using sulfonated β-cyclodextrins such as β-cyclodextrin sulfonic acid, β-cyclodextrin propyl sulfonic acid, and β-cyclodextrin butyl sulfonic acid as an efficient, supramolecular reusable catalyst under diverse reaction conditions.
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Affiliation(s)
- Bubun Banerjee
- Department of Chemistry , Akal University , Talwandi Sabo , Bathinda , Punjab - 151302 , India
| | - Anu Priya
- Department of Chemistry , Akal University , Talwandi Sabo , Bathinda , Punjab - 151302 , India
| | - Aditi Sharma
- Department of Chemistry , Akal University , Talwandi Sabo , Bathinda , Punjab - 151302 , India
| | - Gurpreet Kaur
- Department of Chemistry , Akal University , Talwandi Sabo , Bathinda , Punjab - 151302 , India
| | - Manmeet Kaur
- Department of Chemistry , Akal University , Talwandi Sabo , Bathinda , Punjab - 151302 , India
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12
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He J, Yu Y, Guo P, Liu X, Zhu B, Cao H. Palladium‐Catalyzed C‐N Bond Formation: A Straightforward Alkoxymethylation Process for the Synthesis of the C1 and C3‐Dialkoxy Indoles. ChemistrySelect 2020. [DOI: 10.1002/slct.202004226] [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)
- Jiaming He
- School of Chemistry and Chemical Engineering Guangdong Pharmaceutical University Zhongshan 528458 P.R. of China
| | - Yue Yu
- School of Chemistry and Chemical Engineering Guangdong Pharmaceutical University Zhongshan 528458 P.R. of China
| | - Pengfeng Guo
- School of Chemistry and Chemical Engineering Guangdong Pharmaceutical University Zhongshan 528458 P.R. of China
| | - Xiang Liu
- School of Chemistry and Chemical Engineering Guangdong Pharmaceutical University Zhongshan 528458 P.R. of China
| | - Baofu Zhu
- School of Chemistry and Chemical Engineering Guangdong Pharmaceutical University Zhongshan 528458 P.R. of China
| | - Hua Cao
- School of Chemistry and Chemical Engineering Guangdong Pharmaceutical University Zhongshan 528458 P.R. of China
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13
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Chen A, Yang D, Yu Y, Liu X, Rao C, Lin H, Guo P. Cu-catalyzed cross-coupling of methyl ketones and pyridin-2-amines for the synthesis of N-(2-pyridyl)-α-ketoamides. JOURNAL OF CHEMICAL RESEARCH 2020. [DOI: 10.1177/1747519820950222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An efficient copper-catalyzed strategy for the synthesis of α-ketoamides via cross-coupling of methyl ketones and pyridin-2-amines is described. This transformation has provided a simple process for the formation of C−N and C=O bonds to prepare α-ketoamides, which are important substrates and intermediates for the preparation of fine chemicals. The reaction mechanism is investigated, which suggests that the reaction proceeds via a radical pathway.
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Affiliation(s)
- Ali Chen
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, P.R. China
| | - Daji Yang
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, P.R. China
| | - Yue Yu
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, P.R. China
| | - Xiang Liu
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, P.R. China
| | - Chuixiong Rao
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, P.R. China
| | - Haoming Lin
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, P.R. China
| | - Pengfeng Guo
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, P.R. China
- Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan, P.R. China
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14
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Patel OPS, Nandwana NK, Legoabe LJ, Das BC, Kumar A. Recent Advances in Radical C−H Bond Functionalization of Imidazoheterocycles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000633] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Om P. S. Patel
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
- Centre of Excellence for Pharmaceutical Sciences North-West University Private Bag X6001 Potchefstroom 2520 South Africa
| | - Nitesh K. Nandwana
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
- Departments of Medicine and Pharmacological Sciences Icahn School of Medicine at Mount Sinai New York, NY 10029 USA
| | - Lesetja J. Legoabe
- Centre of Excellence for Pharmaceutical Sciences North-West University Private Bag X6001 Potchefstroom 2520 South Africa
| | - Bhaskar C. Das
- Departments of Medicine and Pharmacological Sciences Icahn School of Medicine at Mount Sinai New York, NY 10029 USA
| | - Anil Kumar
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
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15
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Samanta S, Ghosh AK, Ghosh S, Ilina AA, Volkova YA, Zavarzin IV, Scherbakov AM, Salnikova DI, Dzichenka YU, Sachenko AB, Shirinian VZ, Hajra A. Fe(iii)-Catalyzed synthesis of steroidal imidazoheterocycles as potent antiproliferative agents. Org Biomol Chem 2020; 18:5571-5576. [PMID: 32662797 DOI: 10.1039/d0ob01241f] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An efficient and practical method has been developed for the synthesis of steroidal imidazoheterocycles via cost-effective and environmentally benign FeCl3-catalyzed oxidative amination. A library of steroidal imidazo[1,2-a]pyridines was directly synthesized from readily available 2-aminopyridines and steroidal ketones in aerobic conditions. The synthesized compounds were screened for activity on human microsomal cytochrome P450s CYP7, CYP17 and CYP21. Antiproliferative activity of two lead compounds 3ia and 3la was additionally evaluated against the human MCF-7 (breast cancer), SKOV3 (ovarian cancer), and 22Rv1 (prostate cancer) cell lines. Steroidal imidazo[1,2-a]pyridine 3la which is a substrate molecule for CYP17A1 with IC50 = 1.7 μM (MCF-7), 3.0 (SKOV3), and 6.0 μM (22Rv1) has proved to be more active than reference drug cisplatin.
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Affiliation(s)
- Sadhanendu Samanta
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, West Bengal, India.
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16
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Gudimella SK, Kaur A, Kumar R, Samanta S. CuCl2-catalyzed N O bond cleavage of oxime esters: Approach to imidazoheterocycles and furo[3,2-c]chromenyl fused imidazoles. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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17
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Bhutia Z, Panjikar PC, Iyer S, Chatterjee A, Banerjee M. Iodine Promoted Efficient Synthesis of 2-Arylimidazo[1,2- a]pyridines in Aqueous Media: A Comparative Study between Micellar Catalysis and an "On-Water" Platform. ACS OMEGA 2020; 5:13333-13343. [PMID: 32548520 PMCID: PMC7288711 DOI: 10.1021/acsomega.0c01478] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 05/12/2020] [Indexed: 05/12/2023]
Abstract
In a new and environmentally sustainable approach, a series of 2-arylimidazo[1,2-a]pyridine derivatives were synthesized in aqueous media in the presence of iodine as a catalyst. The reaction proceeded by condensation of various aryl methyl ketones with 2-aminopyridines to afford 2-arylimidazo[1,2-a]pyridines in good overall yields. Although several of the reactions were efficiently performed "on water", the addition of a surfactant, namely, sodium dodecyl sulphate , was found effective in terms of substrate scope and yield enhancement. Both methods were successfully used for the gram-scale synthesis of a marketed drug, zolimidine. The simple experimental setup, water as "green" media, and inexpensive catalyst are some of the merits of this protocol.
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Affiliation(s)
- Zigmee
T. Bhutia
- Department
of Chemistry, BITS Pilani-K. K. Birla Goa
Campus, NH 17 B Bypass
Road, Zuarinagar, Sancoale 403726, Goa, India
| | - Padmini C. Panjikar
- Department
of Chemistry, BITS Pilani-K. K. Birla Goa
Campus, NH 17 B Bypass
Road, Zuarinagar, Sancoale 403726, Goa, India
- Parvatibai
Chowgule College of Arts & Science (Autonomous), Margao 403602, Goa, India
| | - Shruti Iyer
- Department
of Chemistry, BITS Pilani-K. K. Birla Goa
Campus, NH 17 B Bypass
Road, Zuarinagar, Sancoale 403726, Goa, India
| | - Amrita Chatterjee
- Department
of Chemistry, BITS Pilani-K. K. Birla Goa
Campus, NH 17 B Bypass
Road, Zuarinagar, Sancoale 403726, Goa, India
- . Phone: +91-832-2580-320. Fax: +91-832-255-7031
| | - Mainak Banerjee
- Department
of Chemistry, BITS Pilani-K. K. Birla Goa
Campus, NH 17 B Bypass
Road, Zuarinagar, Sancoale 403726, Goa, India
- . Phone: +91-832-2580-347. Fax: +91-832-255-7031
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18
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Li X, Wang S, Zang J, Liu M, Jiang G, Ji F. Copper- and DMF-mediated switchable oxidative C–H cyanation and formylation of imidazo[1,2-a]pyridines using ammonium iodide. Org Biomol Chem 2020; 18:9100-9108. [DOI: 10.1039/d0ob01838d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The cyanation and formylation of imidazo[1,2-a]pyridines were developed under copper-mediated oxidative conditions using ammonium iodide and DMF as a nontoxic combined cyano-group source and DMF as a formylation reagent.
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Affiliation(s)
- Xuan Li
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Shoucai Wang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Jiawang Zang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Meichen Liu
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Guangbin Jiang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Fanghua Ji
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
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19
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Wang S, Zhang S, Liu M, Zang J, Jiang G, Ji F. Palladium-catalyzed C3-selective C–H oxidative carbonylation of imidazo[1,2-a]pyridines with CO and alcohols: a way to access esters. Org Chem Front 2020. [DOI: 10.1039/d0qo00003e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A palladium-catalyzed C3-selective C–H oxidative carbonylation for the synthesis of various esters from imidazo[1,2-a]pyridines and CO with high efficiency and high atom economy has been developed.
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Affiliation(s)
- Shoucai Wang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
| | - Siyu Zhang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
| | - Meichen Liu
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
| | - Jiawang Zang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
| | - Guangbin Jiang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
| | - Fanghua Ji
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
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20
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Li J, Yang D, Wang H, Zhu B, Cao H. Zn-Catalyzed [3+2]-Annulation Strategy: Straightforward Access to Aminoalkyl Indolizines. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Junxuan Li
- School of Chemistry and Chemical Engineering; Guangdong Pharmaceutical University; 528458 Zhongshan P.R. of China
| | - Daji Yang
- School of Chemistry and Chemical Engineering; Guangdong Pharmaceutical University; 528458 Zhongshan P.R. of China
| | - Hua Wang
- Institute for Plant Protection and Soil Science; Hubei Academy of Agricultural Sciences; Nanhu Road 6 430064 Wuhan China
| | - Baofu Zhu
- School of Chemistry and Chemical Engineering; Guangdong Pharmaceutical University; 528458 Zhongshan P.R. of China
| | - Hua Cao
- School of Chemistry and Chemical Engineering; Guangdong Pharmaceutical University; 528458 Zhongshan P.R. of China
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21
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Chen Z, Liang P, Xu F, Qiu R, Tan Q, Long L, Ye M. Lewis Acid-Catalyzed Intermolecular Annulation: Three-Component Reaction toward Imidazo[1,2- a]pyridine Thiones. J Org Chem 2019; 84:9369-9377. [PMID: 31274309 DOI: 10.1021/acs.joc.9b01188] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A Lewis acid-catalyzed three-component annulation reaction of 2-aminopyridines and ynals with elemental sulfur was established. A series of imidazo[1,2-a]pyridine thiones was obtained in moderate to excellent yields. The merits of this transformation include easily available starting materials, multiple C-heteroatom bond formation in one pot, good functional group tolerance, elemental sulfur as S source, operational simplicity, etc.
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Affiliation(s)
- Zhengwang Chen
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province , Gannan Normal University , Ganzhou 341000 , P. R. China
| | - Pei Liang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province , Gannan Normal University , Ganzhou 341000 , P. R. China
| | - Fan Xu
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province , Gannan Normal University , Ganzhou 341000 , P. R. China
| | - Rulin Qiu
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province , Gannan Normal University , Ganzhou 341000 , P. R. China
| | - Qi Tan
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province , Gannan Normal University , Ganzhou 341000 , P. R. China
| | - Lipeng Long
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province , Gannan Normal University , Ganzhou 341000 , P. R. China
| | - Min Ye
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province , Gannan Normal University , Ganzhou 341000 , P. R. China
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22
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Sun C, Yao W, Chen X, Zhao Y, Wei Q, Chen Z, Wu J, Hao F, Xie H. Environmentally Benign, Base-Promoted Selective Amination of Polyhalogenated Pyridines. ACS OMEGA 2019; 4:10534-10538. [PMID: 31460151 PMCID: PMC6648585 DOI: 10.1021/acsomega.9b01031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 06/07/2019] [Indexed: 06/10/2023]
Abstract
An environmentally benign, highly efficient, and base-promoted selective amination of various polyhalogenated pyridines including the challenging pyridine chlorides to 2-aminopyridine derivatives using water as solvent has been developed. Featuring the use of the new method, the reaction is extended to the transformation on a large scale. Mechanistic studies indicate that the pathway involving a base aidant dissociation of N,N-dimethylformamide to generate dimethylamine is likely.
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Affiliation(s)
- Chao Sun
- School
of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang 318000, China
| | - Wubing Yao
- School
of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang 318000, China
- Zhejiang
Hisoar Pharmaceutical Company Limited, Taizhou 318000, PR China
| | - Xu Chen
- School
of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang 318000, China
| | - Yiwen Zhao
- School
of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang 318000, China
| | - Qiqi Wei
- School
of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang 318000, China
| | - Zishuang Chen
- School
of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang 318000, China
| | - Jiashou Wu
- School
of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang 318000, China
| | - Feiyue Hao
- School
of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang 318000, China
- Zhejiang
Hisoar Pharmaceutical Company Limited, Taizhou 318000, PR China
| | - Huiping Xie
- Zhejiang
Hisoar Pharmaceutical Company Limited, Taizhou 318000, PR China
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23
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Samanta SK, Bera MK. Iodine mediated oxidative cross coupling of 2-aminopyridine and aromatic terminal alkyne: a practical route to imidazo[1,2-a]pyridine derivatives. Org Biomol Chem 2019; 17:6441-6449. [PMID: 31206121 DOI: 10.1039/c9ob00812h] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A novel, transition-metal free route leading to imidazo[1,2-a]pyridine derivatives via iodine mediated oxidative coupling between 2-aminopyridine and aromatic terminal alkyne has been demonstrated. This newly developed method discloses an operationally simple way for the construction of imidazoheterocycles. Commercially available antiulcer drug zolimidine may readily be synthesized employing this method.
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Affiliation(s)
- Surya Kanta Samanta
- Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST), Shibpur PO-Botanic Garden, Howrah-711 103, WB, India.
| | - Mrinal K Bera
- Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST), Shibpur PO-Botanic Garden, Howrah-711 103, WB, India.
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24
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Wang C, Yu Y, Su Z, Li X, Cao H. Metal-Free C–B Bond Cleavage: An Acid Catalyzed Three-Component Reaction Construction of Imidazole-Containing Triarylmethanes. Org Lett 2019; 21:4420-4423. [DOI: 10.1021/acs.orglett.9b00969] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Changcheng Wang
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
| | - Yue Yu
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
| | - Zhengquan Su
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
| | - Xuechen Li
- Department of Chemistry, State Key Lab of Synthetic Chemistry, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Hua Cao
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
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25
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He QX, Liang YF, Xu C, Yao XK, Cao H, Yao HG. Highly Regioselective, Acid-Catalyzed, Three-Component Cascade Reaction for the Synthesis of 2-aminopyridine-Decorated Imidazo[1,2- a]pyridine. ACS COMBINATORIAL SCIENCE 2019; 21:149-153. [PMID: 30653293 DOI: 10.1021/acscombsci.8b00149] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A highly regioselective acid-catalyzed three-component reaction of 2-aminopyridine and 3-phenylpropiolaldehyde for the construction of imidazo[1,2- a]pyridine has been developed. This strategy provides a broad range of substrates and represents an efficient approach to give various 2-aminopyridine-decorated imidazo[1,2- a]pyridine in good yields.
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Affiliation(s)
- Qiu-Xing He
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Yao-Feng Liang
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Chang Xu
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Xiao-Kun Yao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Hua Cao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Hua-Gang Yao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
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26
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Liao Y, Huang B, Huang X, Cai M. Heterogeneous Copper-Catalyzed Cascade Three-Component Reaction Towards Imidazo[1,2-a]pyridines: Efficient and Practical One-Pot Synthesis of Alpidem. ChemistrySelect 2019. [DOI: 10.1002/slct.201900128] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yang Liao
- Key Laboratory of Functional Small Organic Molecule; Ministry of Education and College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Bin Huang
- Key Laboratory of Functional Small Organic Molecule; Ministry of Education and College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Xue Huang
- Key Laboratory of Functional Small Organic Molecule; Ministry of Education and College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Mingzhong Cai
- Key Laboratory of Functional Small Organic Molecule; Ministry of Education and College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
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27
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Samanta S, Mondal S, Hajra A. A convergent synthesis of vinyloxyimidazopyridine via Cu(i)-catalyzed three-component coupling. Org Biomol Chem 2019; 16:1088-1092. [PMID: 29243758 DOI: 10.1039/c7ob02883k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The synthesis of vinyloxyimidazopyridine with complete regio- and stereoselectivity has been achieved by the Cu(i)-catalyzed three-component coupling of 2-aminopyridine, 2-oxoaldehyde and alkyne. This protocol is operationally very simple and has much potential for the synthesis of heteroarylated vinyl ethers from basic chemicals. Steroidal imidazopyridinyl vinyl ether was obtained successfully from ethynylestradiol.
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Affiliation(s)
- Sadhanendu Samanta
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235 West Bengal, India.
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28
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Tzani M, Kallitsakis MG, Symeonidis TS, Lykakis IN. Alumina-Supported Gold Nanoparticles as a Bifunctional Catalyst for the Synthesis of 2-Amino-3-arylimidazo[1,2- a]pyridines. ACS OMEGA 2018; 3:17947-17956. [PMID: 31458387 PMCID: PMC6643465 DOI: 10.1021/acsomega.8b03047] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 12/06/2018] [Indexed: 05/31/2023]
Abstract
The bifunctional catalytic efficacy of alumina-supported gold nanoparticles (Au/Al2O3) was investigated for the synthesis of a series of 2-amino-3-aryl-imidazopyridines through the chemoselective reduction of the corresponding 2-nitro-3-aryl-imidazo[1,2-a]pyridines in high isolated yields. This highly efficient protocol was initially applied for the synthesis of 2-nitro-3-aryl imidazo[1,2-a]pyridines via the reaction between 2-aminopyridine and nitroalkenes catalyzed by the present catalytic system Au/Al2O3. Moreover, the heterogeneous surface γ-Al2O3 was also found to catalyze this pathway in a comparable manner. However, only Au/Al2O3 was further proved as the appropriate catalytic system for the selective transfer hydrogenation of the synthesized 2-nitro imidazopyridine derivatives into the corresponding 2-amino-3-aryl imidazo[1,2-a]pyridines using NaBH4 as a hydrogen-donor molecule. In addition, the one-pot two-step reaction between nitroalkenes and aminopyridines in the presence of Au/Al2O3-NaBH4 provided directly the fast and facile synthesis of 2-amino-3-aryl imidazopyridines, highlighting a useful synthetic application of the catalytic protocol.
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29
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Yu Y, Su Z, Cao H. Strategies for Synthesis of Imidazo[1,2-a
]pyridine Derivatives: Carbene Transformations or C−H Functionalizations. CHEM REC 2018; 19:2105-2118. [DOI: 10.1002/tcr.201800168] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/22/2018] [Indexed: 01/21/2023]
Affiliation(s)
- Yue Yu
- School of Chemistry and Chemical Engineering; Guangdong Pharmaceutical University; Zhongshan 528458 P.R. of China
| | - Zhengquan Su
- School of Public Health; Guangdong Pharmaceutical University; Guangzhou 510006 P.R. of China
| | - Hua Cao
- School of Chemistry and Chemical Engineering; Guangdong Pharmaceutical University; Zhongshan 528458 P.R. of China
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30
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Behera A, Rakshit A, Sahoo AK, Patel BK. One Pot Sequential Synthesis of N
-[2-(Phenylsulfinyl)phenyl]acetamides: A Ring Opening Rearrangement Functionalization (RORF). European J Org Chem 2018. [DOI: 10.1002/ejoc.201801597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Ahalya Behera
- Department of Chemistry; Indian Institute of Technology Guwahati; 781 039 North Guwahati Assam India
| | - Amitava Rakshit
- Department of Chemistry; Indian Institute of Technology Guwahati; 781 039 North Guwahati Assam India
| | - Ashish K. Sahoo
- Department of Chemistry; Indian Institute of Technology Guwahati; 781 039 North Guwahati Assam India
| | - Bhisma K. Patel
- Department of Chemistry; Indian Institute of Technology Guwahati; 781 039 North Guwahati Assam India
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31
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Li Y, Huang S, Liao C, Shao Y, Chen L. Transition-metal-free access to 2-aminopyridine derivatives from 2-fluoropyridine and acetamidine hydrochloride. Org Biomol Chem 2018; 16:7564-7567. [PMID: 30288539 DOI: 10.1039/c8ob02129e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Under catalyst-free conditions, an efficient method for the synthesis of 2-aminopyridine derivatives through the nucleophilic substitution and hydrolysis of 2-fluoropyridine and acetamidine hydrochloride has been developed. This amination uses inexpensive acetamidine hydrochloride as the ammonia source and has the advantages of a high yield, high chemoselectivity and wide substrate adaptability. The results suggest that other N-heterocycles containing fluorine substituents can also complete the reaction via these reaction conditions and yield the target products.
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Affiliation(s)
- Yibiao Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
| | - Shuo Huang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
| | - Chunshu Liao
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
| | - Yan Shao
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
| | - Lu Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
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32
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Singsardar M, Mondal S, Sarkar R, Hajra A. (Diacetoxy)iodobenzene-Mediated Regioselective Imidation of Imidazoheterocycles with N-Fluorobenzenesulfonimide. ACS OMEGA 2018; 3:12505-12512. [PMID: 31457983 PMCID: PMC6645145 DOI: 10.1021/acsomega.8b02088] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 09/25/2018] [Indexed: 06/10/2023]
Abstract
Metal-free (diacetoxy)iodobenzene-mediated regioselective imidation of imidazoheterocycles using commercially available N-fluorobenzenesulfonimide as an imidating reagent has been developed. This protocol exhibits broad substrate scope with good to excellent yields of the imidated imidazopyridines under mild conditions in short reaction times. The present protocol also represents an efficient way to access the imidated derivatives of imidazo[2,1-b]thiazole, benzo[d]imidazo-[2,1-b]thiazole, indoles, and indolizines. A radical mechanistic pathway has been proposed for the present protocol.
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33
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Li X, Wang T, Lu YJ, Ji S, Huo Y, Liu B. Copper-catalyzed oxidative multicomponent reaction: synthesis of imidazo fused heterocycles with molecular oxygen. Org Biomol Chem 2018; 16:7143-7151. [PMID: 30091779 DOI: 10.1039/c8ob01532e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An oxidative cascade that involves multicomponent reaction comprising a terminal alkyne, 2-amino N-heterocycle, benzyl or allylic bromide with molecular oxygen, delivering densely functionalized imidazo fused heterocycles, is described. This reaction features a cheap catalyst, a green oxidant, and readily available starting materials, which make the overall synthesis applicable in the quick access to relevant pharmaceutical molecules with imidazole derived heterocycles.
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Affiliation(s)
- Xianwei Li
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China.
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34
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Samanta S, Hajra A. Ruthenium-catalyzed tandem annulation/arylation for the synthesis of unsymmetrical bis(heteroaryl)methanes. Org Biomol Chem 2018; 16:8390-8394. [PMID: 30209462 DOI: 10.1039/c8ob01892h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A new Ru-catalyzed tandem furan annulation/arylation strategy has been developed to afford unsymmetrical bis(heteroaryl)methanes by a reaction between propargyl amines and indoles. A series of bis(heteroaryl)methanes containing furan and indole as well as indole and imidazopyridine moieties have been synthesized in high yields. The reaction possibly proceeds through furan annulation followed by nucleophilic addition of indole.
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Affiliation(s)
- Sadhanendu Samanta
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235 West Bengal, India.
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35
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Song GT, McConnell N, Chen ZZ, Yao XF, Huang JH, Lei J, Lin HK, Frett B, Li HY, Xu ZG. Diversity-Oriented Synthesis of Functionalized Imidazopyridine Analogues with Anti-Cancer Activity through a Transition-Metal Free, One-pot Cascade Reaction. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800728] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gui-Ting Song
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI; Chongqing University of Arts and Sciences.; NO. 319 Honghe Ave. Yongchuan, Chongqing 402160 People's Republic of China
| | - Nicholas McConnell
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Arkansas for Medical Sciences; Little Rock AR 72205 United States
- Department of Pharmacology and Toxicology; University of Arizona; Tucson, Arizona 85719 United States
| | - Zhong-Zhu Chen
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI; Chongqing University of Arts and Sciences.; NO. 319 Honghe Ave. Yongchuan, Chongqing 402160 People's Republic of China
| | - Xiao-Fang Yao
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI; Chongqing University of Arts and Sciences.; NO. 319 Honghe Ave. Yongchuan, Chongqing 402160 People's Republic of China
| | - Jiu-Hong Huang
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI; Chongqing University of Arts and Sciences.; NO. 319 Honghe Ave. Yongchuan, Chongqing 402160 People's Republic of China
| | - Jie Lei
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI; Chongqing University of Arts and Sciences.; NO. 319 Honghe Ave. Yongchuan, Chongqing 402160 People's Republic of China
| | - Hui-Kuan Lin
- Department of Cancer Biology; Wake Forest School of Medicine; Winston-Salem, North Carolina 27157 United States
| | - Brendan Frett
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Arkansas for Medical Sciences; Little Rock AR 72205 United States
| | - Hong-yu Li
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Arkansas for Medical Sciences; Little Rock AR 72205 United States
| | - Zhi-Gang Xu
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI; Chongqing University of Arts and Sciences.; NO. 319 Honghe Ave. Yongchuan, Chongqing 402160 People's Republic of China
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36
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Chen H, Yi H, Tang Z, Bian C, Zhang H, Lei A. External Oxidant-Free Regioselective Cross Dehydrogenative Coupling of 2-Arylimidazoheterocycles and Azoles with H2
Evolution via Photoredox Catalysis. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800531] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hong Chen
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 People's Republic of China
| | - Hong Yi
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 People's Republic of China
| | - Zilu Tang
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 People's Republic of China
| | - Changliang Bian
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 People's Republic of China
| | - Heng Zhang
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 People's Republic of China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 People's Republic of China
- National Research Center for Carbohydrate Synthesis; Jiangxi Normal University; Nanchang 330022 People's Republic of China
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37
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Li B, Chen Z, Cao H, Zhao H. Transition-Metal-Free Regioselective Cross-Coupling: Controlled Synthesis of Mono- or Dithiolation Indolizines. Org Lett 2018; 20:3291-3295. [DOI: 10.1021/acs.orglett.8b01168] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Bin Li
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Zhiyu Chen
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Hua Cao
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Hong Zhao
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
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38
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Yang D, Yu Y, Wu Y, Feng H, Li X, Cao H. One-Pot Regiospecific Synthesis of Indolizines: A Solvent-Free, Metal-Free, Three-Component Reaction of 2-(Pyridin-2-yl)acetates, Ynals, and Alcohols or Thiols. Org Lett 2018; 20:2477-2480. [DOI: 10.1021/acs.orglett.8b00835] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Daji Yang
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Yue Yu
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Yuanheng Wu
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Huiyi Feng
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Xuechen Li
- Department of Chemistry, State Key Lab of Synthetic Chemistry, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Hua Cao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China
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39
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Dey A, Singsardar M, Sarkar R, Hajra A. Environment-Friendly Protocol for the Chlorination of Imidazoheterocycles by Chloramine-T. ACS OMEGA 2018; 3:3513-3521. [PMID: 31458602 PMCID: PMC6641228 DOI: 10.1021/acsomega.7b01844] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 03/15/2018] [Indexed: 05/27/2023]
Abstract
An environment-friendly method for the chlorination of imidazoheterocycles has been developed using chloramine-T, a novel chlorinating reagent. A bunch of C-3 chloro-substituted imidazo[1,2-a]pyridines with variety of functionalities have been synthesized in good yields under neat condition at room temperature within very short time. This chlorination process is also applicable to imidazo[2,1-b]thiazole scaffolds. The present methodology is relevant to gram-scale synthesis. The major advantages of this system such as wide applicability, easy availability of reactants, open-air and metal- and solvent-free reaction conditions, no need of work-up, and simple purification technique represent a green synthetic protocol.
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40
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Tan J, Ni P, Huang H, Deng GJ. Metal- and base-free synthesis of imidazo[1,2-a]pyridines through elemental sulfur-initiated oxidative annulation of 2-aminopyridines and aldehydes. Org Biomol Chem 2018; 16:4227-4230. [DOI: 10.1039/c8ob00981c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An elemental sulfur-based metal- and base-free system enables oxidative imidazo[1,2-a]pyridine annulations.
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Affiliation(s)
- Jing Tan
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Penghui Ni
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
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41
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He Y, Yin W, Wang J, Huang J, Pang X, Gan C, Yang F, Huang C. I2-Catalyzed intramolecular dehydrogenative aminooxygenation of alkynes to acylated imidazo[1,2-a]pyridines and indolizines. Org Chem Front 2018. [DOI: 10.1039/c8qo00063h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and green protocol for the construction of acylated imidazo[1,2-a]pyridines and indolizines via intramolecular dehydrogenative aminooxygenation of alkynes has been developed.
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Affiliation(s)
- Yimiao He
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001
- P. R. China
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics (Guangxi Teachers Education University)
| | - Wenqing Yin
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001
- P. R. China
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics (Guangxi Teachers Education University)
| | - Jian Wang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Jianrong Huang
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001
- P. R. China
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics (Guangxi Teachers Education University)
| | - Xinru Pang
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001
- P. R. China
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics (Guangxi Teachers Education University)
| | - Chunfang Gan
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001
- P. R. China
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics (Guangxi Teachers Education University)
| | - Fang Yang
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001
- P. R. China
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics (Guangxi Teachers Education University)
| | - Chusheng Huang
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001
- P. R. China
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics (Guangxi Teachers Education University)
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42
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Cui Z, Zhu B, Li X, Cao H. Access to sulfonylated furans or imidazo[1,2-a]pyridines via a metal-free three-component, domino reaction. Org Chem Front 2018. [DOI: 10.1039/c8qo00443a] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
An efficient three-component reaction for the synthesis of sulfonylated furans or imidazo[1,2-a]pyridines has been developed.
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Affiliation(s)
- Zhiming Cui
- School of Chemistry and Chemical Engineering
- Guangdong Pharmaceutical University
- Zhongshan 528458
- P. R. China
| | - Baofu Zhu
- School of Chemistry and Chemical Engineering
- Guangdong Pharmaceutical University
- Zhongshan 528458
- P. R. China
| | - Xuechen Li
- Department of Chemistry
- State Key Lab of Synthetic Chemistry
- The University of Hong Kong
- China
| | - Hua Cao
- School of Chemistry and Chemical Engineering
- Guangdong Pharmaceutical University
- Zhongshan 528458
- P. R. China
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43
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Shivhare KN, Jaiswal MK, Srivastava A, Tiwari SK, Siddiqui IR. Visible-light-activated C–C and C–N bond formation in the synthesis of imidazo[1,2-a]pyridines and imidazo[2,1-b]thiazoles under catalyst and solvent-free conditions. NEW J CHEM 2018. [DOI: 10.1039/c8nj03339k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of 3-aminoimidazo-fused heterocycles via the Groebke–Blackburn–Bienaymé reaction using a universally available energy source under catalyst and solvent-free conditions.
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Affiliation(s)
- Km Neha Shivhare
- Laboratory of Green Synthesis
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
| | - Manish K. Jaiswal
- Indian Institute of Technology Delhi
- Department of Chemistry
- Hauz Khas
- New Delhi 110016
- India
| | - Anushree Srivastava
- Laboratory of Green Synthesis
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
| | - Saurabh K. Tiwari
- Laboratory of Green Synthesis
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
| | - I. R. Siddiqui
- Laboratory of Green Synthesis
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
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44
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Wang C, Lai J, Chen C, Li X, Cao H. Ag-Catalyzed Tandem Three-Component Reaction toward the Synthesis of Multisubstituted Imidazoles. J Org Chem 2017; 82:13740-13745. [DOI: 10.1021/acs.joc.7b02612] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Changcheng Wang
- School
of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P.R. of China
| | - Jialin Lai
- School
of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P.R. of China
| | - Cantao Chen
- School
of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P.R. of China
| | - Xuechen Li
- Department
of Chemistry, State Key Lab of Synthetic Chemistry, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Hua Cao
- School
of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P.R. of China
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45
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Adiyala PR, Sastry KNV, Kovvuri J, Nagarajan A, Reddy VG, Sayeed IB, Nayak VL, Maurya RA, Kamal A. Visible Light Driven Coupling of 2-aminopyridines and α-Keto Vinyl Azides for the Synthesis of Imidazo[1, 2-a
]pyridines and Their Cytotoxicity. ChemistrySelect 2017. [DOI: 10.1002/slct.201700952] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Praveen Reddy Adiyala
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Kasinathuni Naga Visweswara Sastry
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Hyderabad-500 037 India
| | - Jeshma Kovvuri
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Apoorva Nagarajan
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Velma Ganga Reddy
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Ibrahim Bin Sayeed
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Vedinthe Lakshma Nayak
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Ram Awatar Maurya
- Applied Organic Chemistry Group; Chemical Science & Technology Division; CSIR-North East Institute of Science and Technology; Jorhat Assam-785006 India
| | - Ahmed Kamal
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Hyderabad-500 037 India
- Catalytic Chemistry Research Chair; Chemistry Department; College of Science; King Saud University; Riyadh 11451 Saudi Arabia
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46
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Takagi K, Ito K, Yamada Y, Nakashima T, Fukuda R, Ehara M, Takeuchi D. Synthesis and Optical Properties of Fused π-Conjugated Imidazole Compounds. CHEM LETT 2017. [DOI: 10.1246/cl.170569] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Koji Takagi
- Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555
| | - Kaede Ito
- Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555
| | - Yoshihiro Yamada
- Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555
| | - Takuya Nakashima
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192
| | - Ryoichi Fukuda
- Research Center for Computational Science and Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245
| | - Masahiro Ehara
- Research Center for Computational Science and Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245
| | - Daisuke Takeuchi
- Laboratory of Chemistry and Life Science Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503
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47
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Lou Z, Yang H, Zhu C, Fu H. Copper-Catalyzed C−H Activation of Substituted Pyridines Leading to Imidazopyridine Derivatives via Self-Redox of the Substrates. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700381] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Zhenbang Lou
- School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 P. R. China
| | - Haijun Yang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 P. R. China
| | - Changjin Zhu
- School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Hua Fu
- School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 P. R. China
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48
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Wang C, Wang E, Chen W, Zhang L, Zhan H, Wu Y, Cao H. Substrate-Controlled Selectivity Switch in a Three-Component Reaction: A Ag-Catalyzed Strategy for the Synthesis of Functionalized Imidazoles. J Org Chem 2017; 82:9144-9153. [DOI: 10.1021/acs.joc.7b01781] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Changcheng Wang
- School of Chemistry and Chemical
Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
| | - Enming Wang
- School of Chemistry and Chemical
Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
| | - Weixin Chen
- School of Chemistry and Chemical
Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
| | - Lijuan Zhang
- School of Chemistry and Chemical
Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
| | - Haiying Zhan
- School of Chemistry and Chemical
Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
| | - Yuanheng Wu
- School of Chemistry and Chemical
Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
| | - Hua Cao
- School of Chemistry and Chemical
Engineering, Guangdong Pharmaceutical University, Zhongshan, 528458, P. R. China
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49
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Mondal S, Samanta S, Singsardar M, Hajra A. Aminomethylation of Imidazoheterocycles with Morpholine. Org Lett 2017; 19:3751-3754. [DOI: 10.1021/acs.orglett.7b01594] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Susmita Mondal
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Sadhanendu Samanta
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Mukta Singsardar
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
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50
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Sultana F, Shaik SP, Alarifi A, Srivastava AK, Kamal A. Transition-Metal-Free Oxidative Cross-Coupling of Methylhetarenes with Imidazoheterocycles towards Efficient C(sp2
)−H Carbonylation. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700173] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Faria Sultana
- Medicinal Chemistry and Biotechnology Division; CSIR-Indian Institute of Chemical Technology; Uppal Road Hyderabad- 500007 India
| | - Siddiq Pasha Shaik
- Medicinal Chemistry and Biotechnology Division; CSIR-Indian Institute of Chemical Technology; Uppal Road Hyderabad- 500007 India
- Chemical Sciences Division; Academy of Scientific & Innovative Research (AcSIR); New Delhi- 110025 India
| | - Abdullah Alarifi
- Catalytic Chemistry Research Chair; Chemistry Department; College of Science; King Saud University; Riyadh 11451 Saudi Arabia
| | - Ajay Kumar Srivastava
- Medicinal Chemistry and Biotechnology Division; CSIR-Indian Institute of Chemical Technology; Uppal Road Hyderabad- 500007 India
- Chemical Sciences Division; Academy of Scientific & Innovative Research (AcSIR); New Delhi- 110025 India
- Current Address: Medicinal & Process Chemistry Division; CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension; Sitapur Road Lucknow- 226031 India
| | - Ahmed Kamal
- Medicinal Chemistry and Biotechnology Division; CSIR-Indian Institute of Chemical Technology; Uppal Road Hyderabad- 500007 India
- Chemical Sciences Division; Academy of Scientific & Innovative Research (AcSIR); New Delhi- 110025 India
- Catalytic Chemistry Research Chair; Chemistry Department; College of Science; King Saud University; Riyadh 11451 Saudi Arabia
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