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Hooshmand SE, Amini Z, Shiri M, Al-Harrasi A. Synthesis and Fluorescence Properties of Imidazopyridine-Linked Coumarins via Tandem C(sp 2)-H Functionalization/Decarboxylation Reaction. J Fluoresc 2024; 34:1131-1137. [PMID: 37486561 DOI: 10.1007/s10895-023-03345-6] [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: 05/27/2023] [Accepted: 07/07/2023] [Indexed: 07/25/2023]
Abstract
A catalyst-, oxidant-free and green synthetic route for direct access to a series of novel imidazopyridine-linked coumarins has been devised through tandem C(sp2)-H functionalization/decarboxylation reaction in ethyl acetate as a sustainable medium. Moreover, the utilities of ensured products in further organic synthesis were conducted by Suzuki-Miyaura and Sonogashira cross-coupling reactions. The fluorescence characteristics of the produced molecules are appropriate, and the synthesized scaffolds could promisingly garner future attention in clinical diagnostics and bioimaging research.
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Affiliation(s)
- Seyyed Emad Hooshmand
- Department of Organic Chemistry, Faculty of Chemistry, Alzahra University, Vanak, Tehran, 1993893973, Iran
| | - Zahra Amini
- Department of Organic Chemistry, Faculty of Chemistry, Alzahra University, Vanak, Tehran, 1993893973, Iran
| | - Morteza Shiri
- Department of Organic Chemistry, Faculty of Chemistry, Alzahra University, Vanak, Tehran, 1993893973, Iran.
| | - Ahmed Al-Harrasi
- Natural and Medical Sciences Research Center, University of Nizwa, P. O. Box 33, Birkat Al Mauz, Nizwa, 616, Sultanate of Oman.
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2
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Rezaei-Gohar M, Amiri K, Aghaie K, Nayebzadeh B, Ariafard A, Shiri F, Rominger F, Dar'in D, Krasavin M, Balalaie S. Domino Cyclization Reaction of o-Diisocyanoarenes for the Synthesis of Imidazo[1,2- a]pyridinobenzimidazole Backbones. Org Lett 2023. [PMID: 37487026 DOI: 10.1021/acs.orglett.3c02137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
An efficient procedure to access a variety of connected imidazo[1,2-a]pyridine and benzimidazole skeletons through the C-N bond was described as a new type of Buchwald-Hartwig reaction. Furthermore, the bis(imidazo[1,2-a]pyridin-3-yl)aryl-1,2-diamine scaffolds were obtained by changing the equivalent ratio of the starting materials. Some advantages of the protocol are the formation of four new bonds (C═C, C-N), a transition-metal-free reaction, a broad substrate scope, high yields, and mild reaction conditions. The reaction mechanism was confirmed on the basis of DFT calculations.
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Affiliation(s)
- Mohammad Rezaei-Gohar
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, Iran
| | - Kamran Amiri
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, Iran
| | - Kimia Aghaie
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, Iran
| | - Behrouz Nayebzadeh
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, Iran
| | - Alireza Ariafard
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran 1469669191, Iran
- School of Natural Sciences-Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Farshad Shiri
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran 1469669191, Iran
| | - Frank Rominger
- Organisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 271, D-69120 Heidelberg, Germany
| | - Dmitry Dar'in
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Mikhail Krasavin
- Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Saeed Balalaie
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, Iran
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Wang S, Chen Y, Chen D, Ye W, Yao L, Huang Z, Zhou Z. Synthesis, crystal structure and vibrational properties studies of (S)-N-(1-phenylethyl)-6-(4-(trifluoromethoxy)phenyl)imidazo[1,2-a]pyridine-2-carboxamide. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Saha M, Das AR. Hypervalent iodine promoted ortho diversification: 2-aryl benzimidazole, quinazoline and imidazopyridine as directing templates. Org Biomol Chem 2020; 18:941-955. [PMID: 31922163 DOI: 10.1039/c9ob02533b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mild and efficient palladium-catalyzed ortho C(sp2)-H diversification of (NH)-free 2-substituted benzimidazole, quinazoline, and imidazopyridine is reported using hypervalent iodine as the key reagent. Acetoxy, aryl, iodide and nitro functional groups were introduced on the same substrate by simply shifting the reaction conditions in the presence of inorganic additives (Cs2CO3, I2, NaNO2) and the hypervalent iodine reagent (diacetoxyiodo)benzene (PIDA) under aerobic conditions. The combination of NaNO2 with PIDA was successfully employed in Pd-catalyzed C-H bond nitration to achieve a library of nitrated 1,3 N-heterocycles. This versatile ortho C(sp2)-H activation strategy features operational simplicity, short reaction times, and ample substrate possibilities, it requires no ligands or silver salts as additives, and it shows good tolerance of oxidation prone functional groups.
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Affiliation(s)
- Moumita Saha
- Department of Chemistry, University of Calcutta, Kolkata, West Bengal, India.
| | - Asish R Das
- Department of Chemistry, University of Calcutta, Kolkata, West Bengal, India.
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Li B, Shang X, Li L, Xu Y, Wang H, Yang X, Pei M, Zhang R, Zhang G. A fluorescence probe based on 6-phenylimidazo[2,1-b]thiazole and salicylaldehyde for the relay discerning of In3+ and Cr3+. NEW J CHEM 2020. [DOI: 10.1039/c9nj05722f] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A new fluorescence probe, (E)-N′-(2-hydroxybenzylidene)-6-phenylimidazo[2,1-b]thiazole-3-carbohydrazide (LB1), based on 6-phenylimidazo[2,1-b]thiazole and salicylaldehyde was designed and synthesized.
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Affiliation(s)
- Bing Li
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Xiaodong Shang
- Henan Sanmenxia Aoke Chemical Industry Co. Ltd
- Sanmenxia 472000
- China
| | - Linlin Li
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Yuankang Xu
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Hanyu Wang
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Xiaofeng Yang
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Meishan Pei
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Ruiqing Zhang
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Guangyou Zhang
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
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