1
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Volpi G, Laurenti E, Rabezzana R. Imidazopyridine Family: Versatile and Promising Heterocyclic Skeletons for Different Applications. Molecules 2024; 29:2668. [PMID: 38893542 PMCID: PMC11173518 DOI: 10.3390/molecules29112668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 05/30/2024] [Accepted: 05/31/2024] [Indexed: 06/21/2024] Open
Abstract
In recent years, there has been increasing attention focused on various products belonging to the imidazopyridine family; this class of heterocyclic compounds shows unique chemical structure, versatile optical properties, and diverse biological attributes. The broad family of imidazopyridines encompasses different heterocycles, each with its own specific properties and distinct characteristics, making all of them promising for various application fields. In general, this useful category of aromatic heterocycles holds significant promise across various research domains, spanning from material science to pharmaceuticals. The various cores belonging to the imidazopyridine family exhibit unique properties, such as serving as emitters in imaging, ligands for transition metals, showing reversible electrochemical properties, and demonstrating biological activity. Recently, numerous noteworthy advancements have emerged in different technological fields, including optoelectronic devices, sensors, energy conversion, medical applications, and shining emitters for imaging and microscopy. This review intends to provide a state-of-the-art overview of this framework from 1955 to the present day, unveiling different aspects of various applications. This extensive literature survey may guide chemists and researchers in the quest for novel imidazopyridine compounds with enhanced properties and efficiency in different uses.
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Affiliation(s)
- Giorgio Volpi
- Department of Chemistry, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy; (E.L.)
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2
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Balaso Mohite S, Kousin Mirza Y, Kumar V, Partap S, Baji Baba S, Alake J, Bera M, Karpoormath R. Palladium-Catalyzed C-H Olefination of Imidazo[1,2a] pyridine Carboxamide in Aqueous Ethanol under Oxygen. Chemistry 2024; 30:e202304239. [PMID: 38317443 DOI: 10.1002/chem.202304239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/03/2024] [Accepted: 02/05/2024] [Indexed: 02/07/2024]
Abstract
The advancement of sustainable chemistry and changes in the economy are strongly intertwined. Reaction time, cost savings, moderate temperatures, and generation of the fewest byproducts are frequently achieved by using catalytic processes. Herein, we report the C-H olefination of imidazo[1,2a] pyridine carboxamides with various acrylates in the presence of Pd (OAc)2 with O2 as the oxidant in aqueous ethanol rather than using non-ecofriendly solvents. The C-H activation features most user-friendly reaction conditions, excellent yield as well as plenty substrate scope and applicable for C-H deuteriation of the corresponding heteroarenes with D2O. Experimental mechanistic studies indicate that C-H activation step succeeded after formation of tetra coordinated square planer Pd-substrate adduct.
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Affiliation(s)
- Sachin Balaso Mohite
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
| | - Yafia Kousin Mirza
- Photocatalysis & Synthetic Methodology Lab (PSML), Amity Institute of Click Chemistry Research & Studies (AICCRS), Amity University, Noida, 201303, India
| | - Vishal Kumar
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
| | - Sangh Partap
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
| | - Shaik Baji Baba
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
| | - John Alake
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
| | - Milan Bera
- Photocatalysis & Synthetic Methodology Lab (PSML), Amity Institute of Click Chemistry Research & Studies (AICCRS), Amity University, Noida, 201303, India
| | - Rajshekhar Karpoormath
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
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3
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Semenova NV, Schmidt EY, Ushakov IA, Trofimov BA. Acetylene-driven multi-molecular assemblies of high complexity: imidazo[1,2-a]pyridines and 5-chloro-N-[2-(imidazo[1,2-a]pyridin-6-yl)vinyl]pyridin-2-amine. MENDELEEV COMMUNICATIONS 2023. [DOI: 10.1016/j.mencom.2023.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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4
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Priyanka, Rani P, Kiran, Sindhu J. Indolizine: A Promising Framework for Developing a Diverse Array of C−H Functionalized Hybrids. ChemistrySelect 2023. [DOI: 10.1002/slct.202203531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Priyanka
- Department of Chemistry, COBS&H CCSHAU Hisar 125004 India
| | - Payal Rani
- Department of Chemistry, COBS&H CCSHAU Hisar 125004 India
| | - Kiran
- Department of Chemistry, COBS&H CCSHAU Hisar 125004 India
| | - Jayant Sindhu
- Department of Chemistry, COBS&H CCSHAU Hisar 125004 India
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5
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Zhan G, Zhao H, Li DA, Wu Y, Fang H, Peng C, Han B. Synthesis of 2,3-bifunctional imidazo[1,2-a]pyridines through cycloadditions of pyridinium ylides with N-cyano-4-methyl-N-phenylbenzenesulfonamide. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Biological evaluation of imidazopyridine derivatives as potential anticancer agents against breast cancer cells. Med Chem Res 2022. [DOI: 10.1007/s00044-022-02984-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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7
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Beletskaya IP, Ananikov VP. Transition-Metal-Catalyzed C–S, C–Se, and C–Te Bond Formations via Cross-Coupling and Atom-Economic Addition Reactions. Achievements and Challenges. Chem Rev 2022; 122:16110-16293. [DOI: 10.1021/acs.chemrev.1c00836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Irina P. Beletskaya
- Chemistry Department, Lomonosov Moscow State University, Vorob’evy gory, Moscow 119899, Russia
| | - Valentine P. Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia
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8
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Rufino-Felipe E, Valdes H, Morales-Morales D. C‐S cross‐coupling reactions catalyzed by well‐defined copper and nickel complexes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ernesto Rufino-Felipe
- Instituto de Quimica UNAM: Universidad Nacional Autonoma de Mexico Instituto de Quimica Inorganic Chemistry MEXICO
| | - Hugo Valdes
- University of Girona - Montilivi Campus: Universitat de Girona - Campus de Montilivi Chemistry SPAIN
| | - David Morales-Morales
- Instituto de Quimica. Universidad Nacional Autonoma de Mexico Quimica inorganica Ciudad UniversitariaCircuito Exterior S/NCoyoacan 04510 Mexico City MEXICO
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9
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Dai PF, Xu H. Novel Chlorination of Imidazo‐Fused Heterocycles via Dichloro(aryl)‐λ3‐iodanes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Peng-Fei Dai
- First Affiliated Hospital of Anhui Medical University Department of Nuclear Medicine 218 Jixi Road 230022 Hefei CHINA
| | - Huiqin Xu
- First Affiliated Hospital of Anhui Medical University Department of Nuclear Medicine 230022 NanJing CHINA
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10
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Li S, Li X, Wang T, Yang Q, Ouyang Z, Chen J, Zhai H, Li X, Cheng B. Electrochemical Decarboxylative Coupling of N‐Substituted Glycines under Air: Access to C3‐Aminomethylated Imidazo[1,2‐a]pyridines. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | | | | | - Hongbin Zhai
- Peking University Shenzhen Graduate School CHINA
| | - Xiao Li
- University of Science and Technology Liaoning CHINA
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11
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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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12
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Reddy RJ, Shankar A, Kumar JJ, Sharadha N, Krishna GR. Diethyl phosphite-mediated switchable synthesis of bis(imidazoheterocycles) derived disulfanes and sulfanes using imidazoheterocycles and octasulfur. NEW J CHEM 2022. [DOI: 10.1039/d1nj05226h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A unique diethyl phosphite-mediated switchable synthesis of bis(imidazoheterocycle)-derived disulfanes and sulfanes using imidazoheterocycles with sulfur is reported. Moreover, imidazo[1,2-a]pyridine-indole derived thioethers were also realized.
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Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India
| | - Angothu Shankar
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India
| | - Jangam Jagadesh Kumar
- 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
| | - Gamidi Rama Krishna
- X-ray Crystallography, CSIR-National Chemical Laboratory, Pune 411 008, India
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13
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Kumari A, Dehaen W, Chopra D, Dey S. Imidazopyridine–fluoride interaction: solvent-switched AIE effects via S⋯O conformational locking. NEW J CHEM 2022. [DOI: 10.1039/d2nj00561a] [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
Imidazopyridine-based carboxamide exhibiting the aggregation-induced emission phenomenon works effectively in fluoride ion detection through H-bond interaction and subsequent deprotonation.
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Affiliation(s)
- Annu Kumari
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM), Dhanbad 826004, India
| | - Wim Dehaen
- Molecular Design & Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Deepak Chopra
- Crystallography & Crystal Chemistry Laboratory, Department of Chemistry, IISER Bhopal, 462066, India
| | - Swapan Dey
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM), Dhanbad 826004, India
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14
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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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15
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Ghosh S, Laru S, Hajra A. Ortho C-H Functionalization of 2-Arylimidazo[1,2-a]pyridines. CHEM REC 2021; 22:e202100240. [PMID: 34757691 DOI: 10.1002/tcr.202100240] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/19/2021] [Accepted: 10/25/2021] [Indexed: 11/09/2022]
Abstract
C-H activation and functionalization is quite promising in recent days as the strategy offers a go-to general method for different bond formations and hence grants synthetic versatility. At the same time, imidazopyridine, a fused bicycle of imidazole moiety with pyridine ring, has a profound impact due to its ubiquitous and prodigious application in medicinal as well as material chemistry. The presence of N-1 atom in 2-arylImidazo[1,2-a]pyridine facilitates the coordination with metal catalysts leading to the formation of ortho-substituted products. This review summarizes all the articles on ortho C-H functionalization of 2-arylImidazo[1,2-a]pyridines published till August 2021.
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Affiliation(s)
- Sumit Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
| | - Sudip Laru
- 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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16
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Singh D, Chowdhury SR, Pramanik S, Maity S. Molecular iodine enabled generation of iminyl radicals from oximes: A facile route to imidazo[1,2-a]pyridines and its regioselective C-3 sulfenylated products from simple pyridines. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Gan Z, Zhu X, Yan Q, Song X, Yang D. Oxidative dual C–H sulfenylation: A strategy for the synthesis of bis(imidazo[1,2-a]pyridin-3-yl)sulfanes under metal-free conditions using sulfur powder. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.12.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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18
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Konwar D, Bora U. Recent Developments in Transition‐Metal‐Catalyzed Regioselective Functionalization of Imidazo[1, 2‐
a
]pyridine. ChemistrySelect 2021. [DOI: 10.1002/slct.202100144] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Dipika Konwar
- Department of Chemical Sciences Tezpur University, Napaam, Tezpur PIN 784028 Assam India
| | - Utpal Bora
- Department of Chemical Sciences Tezpur University, Napaam, Tezpur PIN 784028 Assam India
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19
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Ma CH, Chen M, Feng ZW, Zhang Y, Wang J, Jiang YQ, Yu B. Functionalization of imidazo[1,2-a]pyridines via radical reactions. NEW J CHEM 2021. [DOI: 10.1039/d1nj00704a] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The recent advances in radical reactions for the direct functionalization of imidazo[1,2-a]pyridines are reviewed.
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Affiliation(s)
- Chun-Hua Ma
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Ming Chen
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Zhi-Wen Feng
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Yan Zhang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Jin Wang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Yu-Qin Jiang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Bing Yu
- Green Catalysis Centre
- College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
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20
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Veltri L, Prestia T, Russo P, Clementi C, Vitale P, Ortica F, Gabriele B. Synthesis of Luminescent Fused Imidazole Bicyclic Acetic Esters by a Multicomponent Palladium Iodide‐Catalyzed Oxidative Alkoxycarbonylation Approach. ChemCatChem 2020. [DOI: 10.1002/cctc.202001693] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lucia Veltri
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC) Department of Chemistry and Chemical Technologies University of Calabria Via Pietro Bucci 12/C 87036 Arcavacata di Rende CS Italy
| | - Tommaso Prestia
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC) Department of Chemistry and Chemical Technologies University of Calabria Via Pietro Bucci 12/C 87036 Arcavacata di Rende CS Italy
| | - Patrizio Russo
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC) Department of Chemistry and Chemical Technologies University of Calabria Via Pietro Bucci 12/C 87036 Arcavacata di Rende CS Italy
| | - Catia Clementi
- Dipartimento di Chimica, Biologia e Biotecnologie Sezione di Chimica Fisica Università degli Studi di Perugia Via Elce di Sotto, 8 06123 Perugia Italy
| | - Paola Vitale
- Department of Pharmacy – Pharmaceutical Sciences University of Bari “Aldo Moro” Via E. Orabona 4 70125 Bari Italy
| | - Fausto Ortica
- Dipartimento di Chimica, Biologia e Biotecnologie Sezione di Chimica Fisica Università degli Studi di Perugia Via Elce di Sotto, 8 06123 Perugia Italy
| | - Bartolo Gabriele
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC) Department of Chemistry and Chemical Technologies University of Calabria Via Pietro Bucci 12/C 87036 Arcavacata di Rende CS Italy
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21
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Saroj, Rangan K, Kumar A. A Facile Synthesis of 3‐(Arylthio)imidazo[1,2‐
a
]pyridin‐2(3H)‐ones from 2‐Aminopyridinium Bromides and Sodium Arenesulfinates. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000996] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Saroj
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
| | - Krishnan Rangan
- Department of Chemistry Birla Institute of Technology and Science Pilani Hyderabad Campus 500078 Telangana India
| | - Anil Kumar
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
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22
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Ghosh P, Samanta S, Ghosh S, Jana S, Hajra A. Aminomethylation of imidazopyridines using N,N-dimethylformamide as an aminomethylating reagent under Cu(II)-catalysis. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152581] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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23
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Breton‐Patient C, Naud‐Martin D, Mahuteau‐Betzer F, Piguel S. Three‐Component C–H Bond Sulfonylation of Imidazoheterocycles by Visible‐Light Organophotoredox Catalysis. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001219] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Chloé Breton‐Patient
- CNRS UMR9187, Inserm U1196 Université Paris‐Saclay 91400 Orsay France
- CNRS UMR9187, Inserm U1196 Institut Curie, Université PSL 91400 Orsay France
| | | | | | - Sandrine Piguel
- CNRS UMR9187, Inserm U1196 Université Paris‐Saclay 91400 Orsay France
- CNRS UMR9187, Inserm U1196 Institut Curie, Université PSL 91400 Orsay France
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24
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Okai H, Tanimoto K, Ohkado R, Iida H. Multicomponent Synthesis of Imidazo[1,2-a]pyridines: Aerobic Oxidative Formation of C–N and C–S Bonds by Flavin–Iodine-Coupled Organocatalysis. Org Lett 2020; 22:8002-8006. [DOI: 10.1021/acs.orglett.0c02929] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Hayaki Okai
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Kazumasa Tanimoto
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Ryoma Ohkado
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Hiroki Iida
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
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25
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Pandey K, Shinde VN, Rangan K, Kumar A. KOH-mediated intramolecular amidation and sulfenylation: A direct approach to access 3-(arylthio)imidazo[1,2-a]pyridin-2-ols. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131499] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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26
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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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27
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Wang CS, Di Monaco S, Thai AN, Rahman MS, Pang BP, Wang C, Yoshikai N. Cobalt/Lewis Acid Catalysis for Hydrocarbofunctionalization of Alkynes via Cooperative C-H Activation. J Am Chem Soc 2020; 142:12878-12889. [PMID: 32573213 DOI: 10.1021/jacs.0c06412] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A catalytic system comprising a cobalt-diphosphine complex and a Lewis acid (LA) such as AlMe3 has been found to promote hydrocarbofunctionalization reactions of alkynes with Lewis basic and electron-deficient substrates such as formamides, pyridones, pyridines and related azines, imidazo[1,2-a]pyridines, and azole derivatives through site-selective C-H activation. Compared with known Ni/LA catalytic systems for analogous transformations, the present catalytic systems not only feature convenient setup using inexpensive and bench-stable precatalyst and ligand such as Co(acac)3 and 1,3-bis(diphenylphosphino)propane (dppp) but also display distinct site-selectivity toward C-H activation of pyridone and pyridine derivatives. In particular, a completely C4-selective alkenylation of pyridine has been achieved for the first time. Meanwhile, the present catalytic system proved to promote exclusively C5-selective alkenylation of imidazo[1,2-a]pyridine derivatives. Mechanistic studies including DFT calculations on the Co/Al-catalyzed addition of formamide to alkyne have suggested that the reaction involves cleavage of the carbamoyl C-H bond as the rate-limiting step, which proceeds through a ligand-to-ligand hydrogen transfer (LLHT) mechanism leading to an alkenyl(carbamoyl)cobalt intermediate.
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Affiliation(s)
- Chang-Sheng Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Sabrina Di Monaco
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Anh Ngoc Thai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Md Shafiqur Rahman
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Benjamin Piaoxiang Pang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Chen Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.,Zhejiang Key Laboratory of Alternative Technologies for Fine Chemical Process, Shaoxing University, Shaoxing 312000, P. R. China
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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28
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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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29
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Saba S, Dos Santos CR, Zavarise BR, Naujorks AAS, Franco MS, Schneider AR, Scheide MR, Affeldt RF, Rafique J, Braga AL. Photoinduced, Direct C(sp
2
)−H Bond Azo Coupling of Imidazoheteroarenes and Imidazoanilines with Aryl Diazonium Salts Catalyzed by Eosin Y. Chemistry 2020; 26:4461-4466. [DOI: 10.1002/chem.201905308] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 12/07/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Sumbal Saba
- Centro de Ciências Naturais e Humanas-CCNHUniversidade Federal do ABC Santo André 09210-580 SP Brazil
| | - Caio R. Dos Santos
- Departamento de QuímicaUniversidade Federal de Santa Catarina-UFSC Florianópolis 88040-900 SC Brazil
| | - Bruno R. Zavarise
- Departamento de QuímicaUniversidade Federal de Santa Catarina-UFSC Florianópolis 88040-900 SC Brazil
| | - Aline A. S. Naujorks
- Instituto de QuímicaUniversidade Federal do Mato Grosso do Sul-UFMS Campo Grande 79074-460 MS Brazil
| | - Marcelo S. Franco
- Departamento de QuímicaUniversidade Federal de Santa Catarina-UFSC Florianópolis 88040-900 SC Brazil
| | - Alex R. Schneider
- Departamento de QuímicaUniversidade Federal de Santa Catarina-UFSC Florianópolis 88040-900 SC Brazil
| | - Marcos R. Scheide
- Departamento de QuímicaUniversidade Federal de Santa Catarina-UFSC Florianópolis 88040-900 SC Brazil
| | - Ricardo F. Affeldt
- Departamento de QuímicaUniversidade Federal de Santa Catarina-UFSC Florianópolis 88040-900 SC Brazil
| | - Jamal Rafique
- Instituto de QuímicaUniversidade Federal do Mato Grosso do Sul-UFMS Campo Grande 79074-460 MS Brazil
| | - Antonio L. Braga
- Departamento de QuímicaUniversidade Federal de Santa Catarina-UFSC Florianópolis 88040-900 SC Brazil
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30
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Mi X, Kong Y, Yang H, Zhang J, Pi C, Cui X. Visible-Light-Promoted Metal-Free C-H Trifluoromethylation of Imidazopyridines. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901860] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xia Mi
- College of Pharmacy; Henan University of Chinese Medicine; 450046 Zhengzhou P. R. China
| | - Yuanfang Kong
- College of Pharmacy; Henan University of Chinese Medicine; 450046 Zhengzhou P. R. China
| | - Huaixia Yang
- College of Pharmacy; Henan University of Chinese Medicine; 450046 Zhengzhou P. R. China
| | - Jingyu Zhang
- College of Pharmacy; Henan University of Chinese Medicine; 450046 Zhengzhou P. R. China
| | - Chao Pi
- College of Chemistry; Henan Key Laboratory of Chemical Biology and Organic Chemistry; Zhengzhou University; 450052 Zhengzhou P. R. China
| | - Xiuling Cui
- College of Chemistry; Henan Key Laboratory of Chemical Biology and Organic Chemistry; Zhengzhou University; 450052 Zhengzhou P. R. China
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31
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Bhattacharjee S, Laru S, Samanta S, Singsardar M, Hajra A. Visible light-induced photocatalytic C–H ethoxycarbonylmethylation of imidazoheterocycles with ethyl diazoacetate. RSC Adv 2020; 10:27984-27988. [PMID: 35519122 PMCID: PMC9055643 DOI: 10.1039/d0ra05795a] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 07/21/2020] [Indexed: 12/30/2022] Open
Abstract
A visible-light-promoted regioselective ethoxycarbonylmethylation of imidazoheterocycles has been developed using an α-diazoester via a radical pathway.
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Affiliation(s)
- Suvam Bhattacharjee
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan
- India
| | - Sudip Laru
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan
- India
| | - Sadhanendu Samanta
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan
- India
| | - Mukta Singsardar
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan
- India
| | - Alakananda Hajra
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan
- India
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32
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Semwal R, Joshi A, Kumar R, Adimurthy S. Annulation of imidazo[1,2- a]pyridines under metal-free conditions. NEW J CHEM 2020. [DOI: 10.1039/d0nj04521g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Synthesis of benzo[a]imidazo[5,1,2-cd]indolizines from 2-arylimidazo[1,2-a]pyridines and benzyne precursors under metal-free conditions has been described.
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Affiliation(s)
- Rashmi Semwal
- Academy of Scientific & Innovative Research
- Ghaziabad
- India
- CSIR – Central Salt & Marine Chemicals Research Institute
- G. B. Marg
| | - Abhisek Joshi
- Academy of Scientific & Innovative Research
- Ghaziabad
- India
- CSIR – Central Salt & Marine Chemicals Research Institute
- G. B. Marg
| | - Rahul Kumar
- Academy of Scientific & Innovative Research
- Ghaziabad
- India
- CSIR – Central Salt & Marine Chemicals Research Institute
- G. B. Marg
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research
- Ghaziabad
- India
- CSIR – Central Salt & Marine Chemicals Research Institute
- G. B. Marg
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33
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Li B, Shen N, Yang Y, Zhang X, Fan X. Synthesis of naphtho[1′,2′:4,5]imidazo[1,2-a]pyridines via Rh(iii)-catalyzed C–H functionalization of 2-arylimidazo[1,2-a]pyridines with cyclic 2-diazo-1,3-diketones featuring with a ring opening and reannulation. Org Chem Front 2020. [DOI: 10.1039/d0qo00073f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An unprecedented synthesis of functionalized naphtho[1′,2′:4,5]imidazo[1,2-a]pyridines via rhodium-catalyzed cascade reactions of 2-arylimidazo[1,2-a]pyridine-3-carbaldehydes with cyclic α-diazo-1,3-diketones is presented.
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Affiliation(s)
- Bin Li
- School of Environment
- School of Chemistry and Chemical Engineering
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
| | - Nana Shen
- School of Environment
- School of Chemistry and Chemical Engineering
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
| | - Yujie Yang
- School of Environment
- School of Chemistry and Chemical Engineering
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
| | - Xinying Zhang
- School of Environment
- School of Chemistry and Chemical Engineering
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
| | - Xuesen Fan
- School of Environment
- School of Chemistry and Chemical Engineering
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
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34
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Jaspal S, Shinde VN, Meena N, Nipate DS, Rangan K, Kumar A. Metal-free benzoylation of imidazoheterocycles by oxidative decarboxylation of arylglyoxylic acids. Org Biomol Chem 2020; 18:9072-9080. [DOI: 10.1039/d0ob01842b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A simple and straightforward approach has been realized for the direct benzoylation of imidazoheterocycles by oxidative decarboxylation of arylglyoxylic acids in the presence of K2S2O8 as an oxidant.
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Affiliation(s)
- Sonam Jaspal
- Department of Chemistry
- Birla Institute of Technology and Science Pilani
- Pilani Campus
- India
| | - Vikki N. Shinde
- Department of Chemistry
- Birla Institute of Technology and Science Pilani
- Pilani Campus
- India
| | - Neha Meena
- Department of Chemistry
- Birla Institute of Technology and Science Pilani
- Pilani Campus
- India
| | - Dhananjay S. Nipate
- Department of Chemistry
- Birla Institute of Technology and Science Pilani
- Pilani Campus
- India
| | - Krishnan Rangan
- Department of Chemistry
- Birla Institute of Technology and Science Pilani
- India
| | - Anil Kumar
- Department of Chemistry
- Birla Institute of Technology and Science Pilani
- Pilani Campus
- India
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35
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Zhao XM, Huang EL, Zhu YS, Li J, Song B, Zhu X, Hao XQ. Oxidative sulfonamidomethylation of imidazopyridines utilizing methanol as the main C1 source. Org Biomol Chem 2019; 17:4869-4878. [PMID: 31041985 DOI: 10.1039/c9ob00596j] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
An efficient one pot, three component synthesis of C3 sulfonamidomethylated imidazopyridines has been disclosed under metal-free conditions, which utilized the commercially available and renewable reagent methanol as the main methylene source. A wide range of substituted imidazopyridines and sulfamides/amines were well tolerated to afford the corresponding products in up to 92% yield. In the isotopic labelling experiment, it was found that a minor part of the methylene also originated from DTBP. Moreover, the radical scavenger reactions were conducted, which suggested that a free-radical mechanism was probably not involved. The current methodology featured several advantages, including broad substrate scope, good functional group tolerance and high reaction efficiency.
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Affiliation(s)
- Xue-Mei Zhao
- College of Chemistry and Molecular Engineering, School of Life Sciences, Zhengzhou University, Zhengzhou 450001, People's Republic of China.
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36
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Mi X, Kong Y, Zhang J, Pi C, Cui X. Visible-light-promoted sulfonylmethylation of imidazopyridines. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.09.040] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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37
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Reddy RJ, Shankar A, Kumari AH. An Efficient Sequential One‐Pot Approach for the Synthesis of C3‐Functionalized Imidazo[1,2‐
a
]pyridines under Transition‐Metal Free Conditions. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900606] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry University College of ScienceOsmania University Hyderabad 500 007 India
| | - Angothu Shankar
- Department of Chemistry University College of ScienceOsmania University Hyderabad 500 007 India
| | - Arram Haritha Kumari
- Department of Chemistry University College of ScienceOsmania University Hyderabad 500 007 India
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38
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Semwal R, Ravi C, Saxena S, Adimurthy S. Copper-Catalyzed Multicomponent Reactions (MCRs) for Disulfenylation of Imidazo[1,2-a]pyridines Using Elemental Sulfur and Arylhalides and Intramolecular Cyclization of Haloimidazo[1,2-a]pyridines. J Org Chem 2019; 84:14151-14160. [DOI: 10.1021/acs.joc.9b01632] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Rashmi Semwal
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Chitrakar Ravi
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Soumya Saxena
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar-364 002, Gujarat, India
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39
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Nandwana N, Patel OPS, Srivathsa MR, Kumar A. Dual Role of Glyoxal in Metal-Free Dicarbonylation Reaction: Synthesis of Symmetrical and Unsymmetrical Dicarbonyl Imidazoheterocycles. ACS OMEGA 2019; 4:10140-10150. [PMID: 31460106 PMCID: PMC6648449 DOI: 10.1021/acsomega.9b00716] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 05/22/2019] [Indexed: 05/28/2023]
Abstract
A practical and efficient method has been developed for the dicarbonylation of imidazoheterocycles using glyoxals as dicarbonyl precursors under metal-free conditions in acetic acid. A series of symmetrical and unsymmetrical dicarbonyl imidazoheterocycles was synthesized in good yields. Aryl and alkyl glyoxals also demonstrated excellent reactivity under similar reaction conditions and delivered corresponding dicarbonyl imidazoheterocycles in high yields. It is believed that the glyoxal plays a dual role both as a dicarbonyl source and as an oxidant in this transformation. A probable mechanistic pathway has been proposed based on control experiments and electrospray ionization high-resolution mass spectrometry analysis.
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40
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Samanta S, Mondal S, Ghosh D, Hajra A. Rhodium-Catalyzed Directed C–H Amidation of Imidazoheterocycles with Dioxazolones. Org Lett 2019; 21:4905-4909. [DOI: 10.1021/acs.orglett.9b01832] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Sadhanendu Samanta
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Susmita Mondal
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Debashis Ghosh
- 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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41
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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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42
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Tian LL, Lu S, Zhang ZH, Huang EL, Yan HT, Zhu X, Hao XQ, Song MP. Copper-Catalyzed Double Thiolation To Access Sulfur-Bridged Imidazopyridines with Isothiocyanate. J Org Chem 2019; 84:5213-5221. [DOI: 10.1021/acs.joc.9b00186] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Lu-Lu Tian
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Shuai Lu
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Zhe-Hua Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - En-Ling Huang
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Hua-Ting Yan
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Xinju Zhu
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Xin-Qi Hao
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Mao-Ping Song
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
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43
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Rawat D, Ravi C, Joshi A, Suresh E, Jana K, Ganguly B, Adimurthy S. Indium-Catalyzed Denitrogenative Transannulation of Pyridotriazoles: Synthesis of Pyrido[1,2-a]indoles. Org Lett 2019; 21:2043-2047. [DOI: 10.1021/acs.orglett.9b00180] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Deepa Rawat
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
| | - Chitrakar Ravi
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
| | - Abhisek Joshi
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
| | - Eringathodi Suresh
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
| | - Kalyanashis Jana
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
| | - Bishwajit Ganguly
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research, CSIR−Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
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44
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Samanta S, Hajra A. Mn(II)-Catalyzed C–H Alkylation of Imidazopyridines and N-Heteroarenes via Decarbonylative and Cross-Dehydrogenative Coupling. J Org Chem 2019; 84:4363-4371. [DOI: 10.1021/acs.joc.9b00366] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Sadhanendu Samanta
- 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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Storozhenko OA, Festa AA, Bella Ndoutoume DR, Aksenov AV, Varlamov AV, Voskressensky LG. Mn-mediated sequential three-component domino Knoevenagel/cyclization/Michael addition/oxidative cyclization reaction towards annulated imidazo[1,2- a]pyridines. Beilstein J Org Chem 2019; 14:3078-3087. [PMID: 30643585 PMCID: PMC6317425 DOI: 10.3762/bjoc.14.287] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 11/26/2018] [Indexed: 12/14/2022] Open
Abstract
The sequential three-component reaction between o-hydroxybenzaldehydes, N-(cyanomethyl)pyridinium salts and a nucleophile towards substituted chromenoimidazopyridines under oxidative conditions has been developed. The employment of Mn(OAc)3·2H2O or KMnO4 as stoichiometric oxidants allowed the use of a wide range of nucleophiles, such as nitromethane, (aza)indoles, pyrroles, phenols, pyrazole, indazole and diethyl malonate. The formation of the target compounds presumably proceeds through a domino Knoevenagel/cyclization/Michael addition/oxidative cyclization reaction sequence.
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Affiliation(s)
- Olga A Storozhenko
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, 117198 Moscow, Russian Federation
| | - Alexey A Festa
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, 117198 Moscow, Russian Federation
| | - Delphine R Bella Ndoutoume
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, 117198 Moscow, Russian Federation
| | - Alexander V Aksenov
- Department of Chemistry, North Caucasus Federal University, Pushkin st. 1a, 355009 Stavropol, Russian Federation
| | - Alexey V Varlamov
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, 117198 Moscow, Russian Federation
| | - Leonid G Voskressensky
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, 117198 Moscow, Russian Federation
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Liu Y, Lu L, Zhou H, Xu F, Ma C, Huang Z, Xu J, Xu S. Chemodivergent synthesis of N-(pyridin-2-yl)amides and 3-bromoimidazo[1,2-a]pyridines from α-bromoketones and 2-aminopyridines. RSC Adv 2019; 9:34671-34676. [PMID: 35529989 PMCID: PMC9073897 DOI: 10.1039/c9ra06724h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 10/21/2019] [Indexed: 11/21/2022] Open
Abstract
N-(Pyridin-2-yl)amides and 3-bromoimidazo[1,2-a]pyridines were synthesized respectively from α-bromoketones and 2-aminopyridine under different reaction conditions.
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Affiliation(s)
- Yanpeng Liu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
- Department of Chemistry
| | - Lixue Lu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Haipin Zhou
- College of Materials & Chemical Engineering
- Chuzhou University
- Chuzhou 239000
- China
| | - Feijie Xu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Cong Ma
- State Key Laboratory of Chemical Biology and Drug Discovery
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Kowloon
- P. R. China
| | - Zhangjian Huang
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Jinyi Xu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Shengtao Xu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
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Deng JC, Zhang JR, Li MH, Huang JC, Lai ZS, Tong XY, Cui ZN, Tang RY. Direct thiocarbamation of imidazoheterocycles via dual C–H sulfurization. Org Biomol Chem 2019; 17:7854-7857. [DOI: 10.1039/c9ob01403a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Direct thiocarbamation via dual C–H sulfurization.
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Affiliation(s)
- Jian-Chao Deng
- Department of Applied Chemistry
- College of Materials and Energy
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
- South China Agricultural University
- Guangzhou 510642
| | - Jun-Rong Zhang
- Department of Applied Chemistry
- College of Materials and Energy
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
- South China Agricultural University
- Guangzhou 510642
| | - Ming-Hua Li
- Department of Applied Chemistry
- College of Materials and Energy
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
- South China Agricultural University
- Guangzhou 510642
| | - Jie-Cheng Huang
- Department of Applied Chemistry
- College of Materials and Energy
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
- South China Agricultural University
- Guangzhou 510642
| | - Zhi-Sheng Lai
- Department of Applied Chemistry
- College of Materials and Energy
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
- South China Agricultural University
- Guangzhou 510642
| | - Xin-Yu Tong
- Department of Applied Chemistry
- College of Materials and Energy
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
- South China Agricultural University
- Guangzhou 510642
| | - Zi-Ning Cui
- Department of Applied Chemistry
- College of Materials and Energy
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
- South China Agricultural University
- Guangzhou 510642
| | - Ri-Yuan Tang
- Department of Applied Chemistry
- College of Materials and Energy
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
- South China Agricultural University
- Guangzhou 510642
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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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49
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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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