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Dupati P, Sapuri‐Butti AR, Musini A, Narayan Singh H. Synthesis of New 2‐(Pyridin‐4‐yl)‐1H‐imidazo[4,5‐
b
]pyridine Derivatives:
In vitro
Antibacterial and
In silico
Screening. ChemistrySelect 2023. [DOI: 10.1002/slct.202204774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Affiliation(s)
- Praveen Dupati
- Department of Chemistry Mahatma Gandhi University Nalgonda Telangana State - 508254 India
| | | | - Anjaneyulu Musini
- Centre for Biotechnology Institute of Science and Technology Jawaharlal Nehru Technological University Hyderabad Telangana State - 500085 India
| | - Himanshu Narayan Singh
- Department of Systems Biology Columbia University Irving Medical Centre 100032 New York USA
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2
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Khatun S, Singh A, Bader GN, Sofi FA. Imidazopyridine, a promising scaffold with potential medicinal applications and structural activity relationship (SAR): recent advances. J Biomol Struct Dyn 2022; 40:14279-14302. [PMID: 34779710 DOI: 10.1080/07391102.2021.1997818] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Imidazopyridine scaffold has gained tremendous importance over the past few decades. Imidazopyridines have been expeditiously used for the rationale design and development of novel synthetic analogs for various therapeutic disorders. A wide variety of imidazopyridine derivatives have been developed as potential anti-cancer, anti-diabetic, anti-tubercular, anti-microbial, anti-viral, anti-inflammatory, central nervous system (CNS) agents besides other chemotherapeutic agents. Imidazopyridine heterocyclic system acts as a key pharmacophore motif for the identification and optimization of lead structures to increase medicinal chemistry toolbox. The present review highlights the medicinal significances of imidazopyridines for their rationale development as lead molecules with improved therapeutic efficacies. This review further emphasis on the structure-activity relationships (SARs) of the various designed imidazopyridines to establish a relationship between the key structural features versus the biological activities.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Samima Khatun
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Punjab, India
| | - Abhinav Singh
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Punjab, India
| | - Ghulam N Bader
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Srinagar, J & K, India
| | - Firdoos Ahmad Sofi
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Srinagar, J & K, India
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3
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Anandaraj P, Ramesh R, Malecki JG. Direct Synthesis of Benzimidazoles by Pd(II) N^N^S-Pincer Type Complexes via Acceptorless Dehydrogenative Coupling of Alcohols with Diamines. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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4
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Dai Y, Santiago-Rivera JA, Hargett S, Salamoun JM, Hoehn KL, Santos WL. Conversion of oxadiazolo[3,4-b]pyrazines to imidazo[4,5-b]pyrazines via a tandem reduction-cyclization sequence generates new mitochondrial uncouplers. Bioorg Med Chem Lett 2022; 73:128912. [PMID: 35907607 DOI: 10.1016/j.bmcl.2022.128912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/14/2022] [Accepted: 07/24/2022] [Indexed: 11/02/2022]
Abstract
We report new mitochondrial uncouplers derived from the conversion of [1,2,5]oxadiazolo[3,4-b]pyrazines to 1H-imidazo[4,5-b]pyrazines. The in situ Fe-mediated reduction of the oxadiazole fragment followed by cyclization gave access to imidazopyrazines in moderate to good yields. A selection of orthoesters also allowed functionalization on the 2-position of the imidazole ring. This method afforded a variety of imidazopyrazine derivatives with varying substitution on the 2, 5 and 6 positions. Our studies suggest that both a 2-trifluoromethyl group and N-methylation are crucial for mitochondrial uncoupling capacity.
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Affiliation(s)
- Yumin Dai
- Department of Chemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, VA 24061, United States
| | - José A Santiago-Rivera
- Department of Chemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, VA 24061, United States
| | - Stefan Hargett
- Departments of Pharmacology and Medicine, University of Virginia, Charlottesville, VA 22908, United States
| | - Joseph M Salamoun
- Department of Chemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, VA 24061, United States
| | - Kyle L Hoehn
- Departments of Pharmacology and Medicine, University of Virginia, Charlottesville, VA 22908, United States; School of Biotechnology and Biomolecular Sciences, University of New South Wales, Kensington, NSW 2033, Australia
| | - Webster L Santos
- Department of Chemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, VA 24061, United States.
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5
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Danehchin M, Esmaeili AA. Biomimetic hydrogenation of electron deficient olefins using in situ generated 2-arylbenzimidazoline: synthesis of novel 3-benzylbenzo[4,5]thiazolo[3,2-a]pyrimidin-4-ones. Mol Divers 2021; 26:1191-1199. [PMID: 34117585 DOI: 10.1007/s11030-021-10246-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 06/03/2021] [Indexed: 11/28/2022]
Abstract
In the present study, 2-Arylbenzimidazoline generated in situ from reaction of aromatic aldehydes and o-phenylenediamine used as biomimetic reductive agents for reductive alkylation of 2-hydroxy-4H-benzo[4,5]thiazolo[3,2-a]pyrimidin-4-one for synthesis of novel 3-benzyl-2-hydroxy-4H-benzo[4,5]thiazolo[3,2-a]pyrimidin-4-ones is described. The main benefits of this protocol include simplicity, reaction mildness, high yield, easy work up, and simple purification. The molecular structures were characterized by IR spectrophotometry, mass spectrometry, NMR spectroscopy, and elemental analysis.
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Affiliation(s)
- Maryam Danehchin
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran
| | - Abbas Ali Esmaeili
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran.
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6
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Göker H, Özden S. Regioselective N–alkylation of 2– (3,4–dimethoxyphenyl)imidazo[4,5–b] and [4,5–c]pyridine oxide derivatives : Synthesis and structure elucidation by NMR. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.07.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Padmaja RD, Devi C. V, Mukku N, Chanda K, Maiti B. Rapid Construction of an Imidazo[4,5- b]pyridine Skeleton from 2-Chloro-3-nitropyridine via Tandem Reaction in H 2O-IPA Medium. ACS Omega 2018; 3:4583-4590. [PMID: 31458681 PMCID: PMC6641603 DOI: 10.1021/acsomega.8b00426] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 04/13/2018] [Indexed: 05/05/2023]
Abstract
A highly efficient, clean, and simple procedure for the synthesis of a privilege imidazo[4,5-b]pyridine scaffold from 2-chloro-3-nitropyridine in combination with environmentally benign H2O-IPA as a green solvent is presented. The scope of the novel method has been demonstrated through the tandem sequence of SNAr reaction with substituted primary amines followed by the in situ nitro group reduction and subsequent heteroannulation with substituted aromatic aldehydes to obtain functionalized imidazo[4,5-b]pyridines with only one chromatographic purification step. The synthesis pathway appears to be green, simple, and superior compared with other already reported procedures, with the high abundance of reagents and great ability in expanding the structural diversity.
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8
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Nisha, Bhargava G, Kumar Y. Copper(I)-Catalyzed Regioselective C-H Amination of N
-Pyridyl Imines Using Azidotrimethylsilane and TBHP: A One-Pot, Domino Approach to Substituted Imidazo[4, 5-b]pyridines. ChemistrySelect 2017. [DOI: 10.1002/slct.201700969] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Nisha
- Department of Chemistry; Faculty of Physical Sciences; SGT University; Gurugram Haryana-122505 India
| | - Gaurav Bhargava
- Department of Chemical Sciences; IKG Punjab Technical University; Kapurthala Punjab-144603 India
| | - Yogesh Kumar
- Department of Chemical Sciences; IKG Punjab Technical University; Kapurthala Punjab-144603 India
- Sphaerapharma Pvt. Ltd.; Manesar, Haryana India-122051 India
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9
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Yaragorla S, Vijaya Babu P. Oxidative C sp3 -H functionalization of 2-methylazaarenes: A practical synthesis of 2-azaarenyl-benzimidazoles and benzothiazoles. Tetrahedron Lett 2017; 58:1879-82. [DOI: 10.1016/j.tetlet.2017.04.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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10
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Al-Duaij OK, Zaki ME, El Gazzar AB. A Simple Precursor for Highly Functionalized Fused Imidazo[4,5-b]pyridines and Imidazo[4,5-b]-1,8-naphthyridine. Molecules 2016; 21:E1646. [PMID: 27916964 DOI: 10.3390/molecules21121646] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 11/21/2016] [Accepted: 11/23/2016] [Indexed: 12/02/2022] Open
Abstract
1-alkyl aryl-5-amino-4-(cyanoformimidoyl)imidazoles 4 were reacted with malononitrile and 2-amino-1,1,3-propenetricarbonitrile under mild experimental conditions, which led to 5-amino-3-(substituted benzyl)-6,7-dicyano-3H-imidazo[4,5-b]pyridines 5 and 6,8-diamino-3-(4-substituted benzyl)-3H-imidazo[4,5-b]-1,8-naphthyridine-7,9-dicarbonitrile 6, respectively, when the reaction was carried out in the absence of a base, or to 5,7-diamino-3-(4-alkyl aryl)-3H-imidazo[4,5-b]pyridine-6-carbonitrile 8, and 6,8,9-triamino-3-(4-substitutedbenzyl)-3H-imidazo[4,5-b]-1,8-naphthyridine-7-carbonitrile 10 in the presence of 1,8-diazabicyclo(5.4.0)undec-7-ene (DBU). Both reactions evolved from an adduct formed by nucleophilic attack of the malononitrile anion or 2-amino-1,1,3-propenetricarbonitrile anion to the carbon of the cyanoformimidoyl substituent. In the case of the malononitrile anion, a 5-amino-1-alkyl aryl-4-(1-amino-2,2-dicyanovinyl)imidazole 7 was isolated when this reaction was carried out in the presence of DBU. The structure of compound 7 was confirmed by spectroscopic methods, and cyclized intramolecularly to 8 by heating in ethanol/triethyl amine.
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11
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Herrera Cano N, Uranga JG, Nardi M, Procopio A, Wunderlin DA, Santiago AN. Selective and eco-friendly procedures for the synthesis of benzimidazole derivatives. The role of the Er(OTf) 3 catalyst in the reaction selectivity. Beilstein J Org Chem 2016; 12:2410-2419. [PMID: 28144309 PMCID: PMC5238590 DOI: 10.3762/bjoc.12.235] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 10/28/2016] [Indexed: 11/23/2022] Open
Abstract
An improved and greener protocol for the synthesis of benzimidazole derivatives, starting from o-phenylenediamine, with different aldehydes is reported. Double-condensation products were selectively obtained when Er(OTf)3 was used as the catalyst in the presence of electron-rich aldehydes. Conversely, the formation of mono-condensation products was the preferred path in absence of this catalyst. One of the major advantages of these reactions was the formation of a single product, avoiding extensive isolation and purification of products, which is frequently associated with these reactions. Theoretical calculations helped to understand the different reactivity established for these reactions. Thus, we found that the charge density on the oxygen of the carbonyl group has a significant impact on the reaction pathway. For instance, electron-rich aldehydes better coordinate to the catalyst, which favours the addition of the amine group to the carbonyl group, therefore facilitating the formation of double-condensation products. Reactions with aliphatic or aromatic aldehydes were possible, without using organic solvents and in a one-pot procedure with short reaction time (2–5 min), affording single products in excellent yields (75–99%). This convenient and eco-friendly methodology offers numerous benefits with respect to other protocols reported for similar compounds.
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Affiliation(s)
- Natividad Herrera Cano
- INFIQC-CONICET and Facultad de Ciencias Químicas, Departamento de Química Orgánica, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, 5000 Argentina
| | - Jorge G Uranga
- INFIQC-CONICET and Facultad de Ciencias Químicas, Departamento de Química Orgánica, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, 5000 Argentina
| | - Mónica Nardi
- Dipartimento di Chimica, Università della Calabria Cubo 12C, 87036-Arcavacata di Rende (CS), Italia
| | - Antonio Procopio
- Dipartimento di Scienze della Salute, Università Magna Graecia, Viale Europa, 88100-Germaneto (CZ), Italia
| | - Daniel A Wunderlin
- ICYTAC-CONICET and Facultad de Ciencias Químicas, Departamento de Química Orgánica, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, 5000 Argentina
| | - Ana N Santiago
- INFIQC-CONICET and Facultad de Ciencias Químicas, Departamento de Química Orgánica, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, 5000 Argentina
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12
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Rajitha G, Ravibabu V, Ramesh G, Rajitha B. Synthesis and antimicrobial activity of novel imidazo[1,2-a]pyridinopyrimidine-2,4,6(1H,3H,5H)-triones and thioxopyrimidine-4,6(1H,5H)diones. Res Chem Intermed 2016; 42:1989-98. [DOI: 10.1007/s11164-015-2130-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Soleimani E, Khodaei MM, Yazdani H, Saei P, Zavar Reza J. Synthesis of 2-substituted benzimidazoles and benzothiazoles using Ag2CO3/Celite as an efficient solid catalyst. J IRAN CHEM SOC 2015. [DOI: 10.1007/s13738-015-0592-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Vellakkaran M, Lingayya R, Naveen Kumar B, Nagaiah K, Poornachandra Y, Ganesh Kumar C. Palladium(0)-catalyzed direct C–H hetero-arylation of 2-arylimidazo [1,2-a]pyridines with (E)-1-(5-bromothiophen-2-yl)-3-arylprop-2-en-1-ones and their anticancer activity. RSC Adv 2015. [DOI: 10.1039/c5ra15078g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
An efficient palladium(0)-catalyzed direct hetero-arylation of imidazo[1,2-a]pyridines at the C-3 position of the imidazole ring has been described.
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Affiliation(s)
- Mari Vellakkaran
- Organic and Biomolecular Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Rajaka Lingayya
- Organic and Biomolecular Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Bejjanki Naveen Kumar
- Organic and Biomolecular Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Kommu Nagaiah
- Organic and Biomolecular Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Y. Poornachandra
- Medicinal Chemistry and Pharmacology Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - C. Ganesh Kumar
- Medicinal Chemistry and Pharmacology Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
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Lemrová B, Smyslová P, Popa I, Oždian T, Zajdel P, Soural M. Directed solid-phase synthesis of trisubstituted imidazo[4,5-c]pyridines and imidazo[4,5-b]pyridines. ACS Comb Sci 2014; 16:558-65. [PMID: 25046560 DOI: 10.1021/co500090t] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An efficient method is described for the solid-supported synthesis of imidazo[4,5-b]pyridines and imidazo[4,5-c]pyridines from 2,4-dichloro-3-nitropyridine. The key pyridine building block was reacted with polymer-supported amines, followed by replacement of the second chlorine with amines, nitro group reduction, and imidazole ring closure with aldehydes. Depending on the combination of polymer-supported and solution-phase reagents, the strategy allowed for the simple preparation of the target trisubstituted derivatives with variable positioning of the pyridine nitrogen atom. Additionally, after a slight modification of the method, the preparation of strictly isomeric imidazopyridines was possible.
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Affiliation(s)
- Barbora Lemrová
- Department
of Organic Chemistry, Institute of Molecular and Translational Medicine,
Faculty of Science, Palacký University, 17. Listopadu 12, 771 46 Olomouc, Czech Republic
| | - Petra Smyslová
- Department
of Organic Chemistry, Institute of Molecular and Translational Medicine,
Faculty of Science, Palacký University, 17. Listopadu 12, 771 46 Olomouc, Czech Republic
| | - Igor Popa
- Department
of Organic Chemistry, Institute of Molecular and Translational Medicine,
Faculty of Science, Palacký University, 17. Listopadu 12, 771 46 Olomouc, Czech Republic
| | - Tomáš Oždian
- Institute
of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University and University Hospital in Olomouc, Hněvotínská
5, 775 15 Olomouc, Czech Republic
| | - Pawel Zajdel
- Department
of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Street, 30-688 Kraków, Poland
| | - Miroslav Soural
- Department
of Organic Chemistry, Institute of Molecular and Translational Medicine,
Faculty of Science, Palacký University, 17. Listopadu 12, 771 46 Olomouc, Czech Republic
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Zhou W-, Zhang X-, Sun X-, Wang B, Wang J-, Bai L. Microwave-assisted synthesis of quinoxaline derivatives using glycerol as a green solvent. Russ Chem Bull 2013; 62:1244-7. [DOI: 10.1007/s11172-013-0171-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Abstract
This perspective summarizes the catalytic activity of K10 montmorillonite as a multifunctional catalyst for organic reactions.
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Affiliation(s)
| | - Amarajothi Dhakshinamoorthy
- School of Chemistry
- Madurai Kamaraj University
- Madurai 625021, India
- Centre for Green Chemistry Processes
- School of Chemistry
| | - Kasi Pitchumani
- School of Chemistry
- Madurai Kamaraj University
- Madurai 625021, India
- Centre for Green Chemistry Processes
- School of Chemistry
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Ulloora S, Shabaraya R, Adhikari AV. New 6-bromoimidazo[1,2-a]pyridine-2-carbohydrazide derivatives: synthesis and anticonvulsant studies. Med Chem Res 2014; 23:3019-28. [DOI: 10.1007/s00044-013-0887-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Suresh D, Dhakshinamoorthy A, Kanagaraj K, Pitchumani K. Synthesis of 2-substituted 3-ethyl-3H-imidazo[4,5-b]pyridines catalyzed by Al3+-exchanged K10 clay as solid acids. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.09.086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Ulloora S, Shabaraya R, Adhikari AV. Facile synthesis of new imidazo[1,2-a]pyridines carrying 1,2,3-triazoles via click chemistry and their antiepileptic studies. Bioorg Med Chem Lett 2013; 23:3368-72. [DOI: 10.1016/j.bmcl.2013.03.086] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 03/19/2013] [Accepted: 03/22/2013] [Indexed: 01/03/2023]
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Ulloora S, Shabaraya R, Aamir S, Adhikari AV. New imidazo[1,2-a]pyridines carrying active pharmacophores: synthesis and anticonvulsant studies. Bioorg Med Chem Lett 2012; 23:1502-6. [PMID: 23352511 DOI: 10.1016/j.bmcl.2012.12.035] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Revised: 11/29/2012] [Accepted: 12/12/2012] [Indexed: 11/25/2022]
Abstract
Five new series of imidazo[1,2-a]pyridines carrying biologically active pyrazoline (4a-e), cyanopyridone (5a, b), cyanopyridine (6a-f), 2-aminopyrimidine (7a-f) and pyrimidine-2-thione (8a-d) systems were designed and synthesized as prominent anticonvulsant agents. The target compounds were screened for their in vivo anticonvulsant activity following maximal electroshock (MES) and subcutaneous pentylene tetrazole (scPTZ) methods at a small test dose of 10 mg/kg. Further, Rotarod toxicity method was used to study the toxicity profile of selected compounds. Compounds 4b, 5a, 5b, 6a, 7e and 8d possessing 4-fluorophenyl substituent at 2nd position of imidazo[1,2-a]pyridine ring displayed potent anticonvulsant activity without displaying any toxicity. Enhanced activity profile was observed for new compounds in PTZ method over MES method.
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Affiliation(s)
- Shrikanth Ulloora
- Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore 575 025, Karnataka, India
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22
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Rosenberg AJ, Zhao J, Clark DA. Synthesis of Imidazo[4,5-b]pyridines and Imidazo[4,5-b]pyrazines by Palladium Catalyzed Amidation of 2-Chloro-3-amino-heterocycles. Org Lett 2012; 14:1764-7. [DOI: 10.1021/ol300359s] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Adam J. Rosenberg
- Department of Chemistry, 1-014 Center for Science and Technology, Syracuse University, Syracuse, New York 13244, United States
| | - Jinbo Zhao
- Department of Chemistry, 1-014 Center for Science and Technology, Syracuse University, Syracuse, New York 13244, United States
| | - Daniel A. Clark
- Department of Chemistry, 1-014 Center for Science and Technology, Syracuse University, Syracuse, New York 13244, United States
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Ren YM, Cai C. Highly Efficient, One-Pot, Solvent-Free Synthesis of Highly Substituted Imidazoles Using Molecular Iodine as Catalyst. ACTA ACUST UNITED AC 2011; 396-398:1871-4. [DOI: 10.4028/www.scientific.net/amr.396-398.1871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly efficient, one-pot synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles under solvent-free conditions using molecular iodine as the catalyst is described with excellent product yields.
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Bachhav HM, Bhagat SB, Telvekar VN. Efficient protocol for the synthesis of quinoxaline, benzoxazole and benzimidazole derivatives using glycerol as green solvent. Tetrahedron Lett 2011; 52:5697-701. [DOI: 10.1016/j.tetlet.2011.08.105] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bukhryakov KV, Kurkin AV, Yurovskaya MA. Synthetic approaches to imidazo[4,5-b]pyridine derivatives (review). Chem Heterocycl Compd (N Y) 2011; 47:533-57. [DOI: 10.1007/s10593-011-0797-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Ouzidan Y, Kandri Rodi Y, Fronczek FR, Venkatraman R, Essassi EM, El Ammari L. 3-[(1-Benzyl-1H-1,2,3-triazol-5-yl)meth-yl]-6-bromo-2-phenyl-3H-imidazo[4,5-b]pyridine. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o890-1. [PMID: 21754166 PMCID: PMC3099998 DOI: 10.1107/s1600536811009123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 03/09/2011] [Indexed: 11/10/2022]
Abstract
There are two crystallographically independent mol-ecules in the asymmetric unit of the title compound, C(22)H(17)BrN(6). The dihedral angles between the imidazo[4,5-b]pyridine mean plane and the phenyl rings are 20.4 (2) and 24.0 (2)° in the two mol-ecules. The orientation of triazoles compared to the imidazo[4,5-b]pyridine system is almost the same in both mol-ecules, with dihedral angles of 64.2 (2) and 65.1 (2)°. However, the main difference between the two mol-ecules lies in the arrangement of the phenyl groups compared to imidazo[4,5-b]pyridine in each mol-ecule. Indeed, in the first mol-ecule the dihedral angle between the plane of the phenyl ring and that of the imidazo[4,5-b]pyridine system is 67.7 (2)°, while in the second mol-ecule the plane of the phenyl ring is almost perpendicular to that of the imidazo[4,5-b]pyridine system with a dihedral angle of 86.0 (2)°.
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Affiliation(s)
- Younes Ouzidan
- Laboratoire de Chimie Organique Appliquée, Université Sidi Mohamed Ben Abdallah, Faculté des Sciences et Techniques, Route d’Immouzzer, BP 2202 Fès, Morocco
| | - Youssef Kandri Rodi
- Laboratoire de Chimie Organique Appliquée, Université Sidi Mohamed Ben Abdallah, Faculté des Sciences et Techniques, Route d’Immouzzer, BP 2202 Fès, Morocco
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Ramaiyer Venkatraman
- Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39217, USA
| | - El Mokhtar Essassi
- INANOTECH (Institute of Nanomaterials and Nanotechnology), MAScIR, Avenue de l’Armée Royale, Rabat, Morocco
| | - Lahcen El Ammari
- Laboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Université Mohammed V-Agdal, Avenue Ibn Battouta, BP 1014, Rabat, Morocco
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Lou H, Ye S, Zhang J, Wu J. Library construction of 1-(1H-imidazol-1-yl)-1,2-dihydroisoquinolines via three-component reaction of 2-alkynylbenzaldehyde, amine, and imidazole. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.01.048] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Qiu G, Ding Q, Gao K, Peng Y, Wu J. Efficient assembly of 1-(1H-imidazol-1-yl)-3-methylene-1H-indenes via tandem reaction of (2-(alkynyl)benzylidene)malonates with imidazoles. ACS Comb Sci 2011; 13:13-8. [PMID: 21247119 DOI: 10.1021/co100006g] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The tandem nucleophilic addition and 5-exo-cyclization of (2-(alkynyl)benzylidene)malonates with imidazole derivatives in the presence of t-BuOK is reported. This reaction proceeds smoothly under mild conditions with high selectivity to afford the corresponding 1-(1H-imidazol-1-yl)-3-methylene-1H-indene-2,2(3H)-dicarboxylates in good to excellent yields.
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Affiliation(s)
- Guanyinsheng Qiu
- Key Laboratory of Green Chemistry of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330027, China
| | - Qiuping Ding
- Key Laboratory of Green Chemistry of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330027, China
| | - Ke Gao
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Yiyuan Peng
- Key Laboratory of Green Chemistry of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330027, China
| | - Jie Wu
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
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Affiliation(s)
- Maria J Climent
- Instituto de Tecnología Química, UPV-CSIC, Universidad Politécnica de Valencia, Spain
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Dubey PK, Prasada Reddy P, Srinivas K. A facile solvent-free synthesis of 1-alkyl/aralkyl-2-(1-arylsulfonyl alkyl) benzimidazoles using “TBAB” as surface catalyst. J Heterocycl Chem 2010. [DOI: 10.1002/jhet.450] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Jain P, Sharma PK, Rajak H, Pawar RS, Patil UK, Singour PK. Design, synthesis and biological evaluation of some novel benzimidazole derivatives for their potential anticonvulsant activity. Arch Pharm Res 2010; 33:971-80. [DOI: 10.1007/s12272-010-0701-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2009] [Revised: 03/28/2010] [Accepted: 03/28/2010] [Indexed: 11/29/2022]
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Gupta S, Agarwal PK, Kundu B. Catalyst/ligand-free synthesis of benzimidazoles and quinazolinones from amidines via intramolecular transamination reaction. Tetrahedron Lett 2010; 51:1887-90. [DOI: 10.1016/j.tetlet.2010.02.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Abstract
An efficient method for the synthesis of 1,2,4,5-tetrasubstituted imidazoles by three-component condensation of benzil, benzonitrile derivatives and primary amines under solvent-free conditions using molecular iodine as catalyst is described with high product yields. The significant features of the iodine-catalysed condensation are operational simplicity, inexpensive reagents, high yield of products and use of non-toxic reagents.
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Affiliation(s)
- Yi-Ming Ren
- Department of Biochemical Engineering, Anhui University of Technology and Science, Wuhu, 241000, P. R. China
| | - Chun Cai
- Chemical Engineering College, Nanjing University of Science & Technology, Nanjing, 210094, P. R. China
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Guravaiah N, Rao VR. An Efficient Stereo Selective Synthesis of Benzyl, (Benzimidazol-2-yl)-Methyl and (6H-Imidazo[4,5-e][2,1,3]Benzothiadiazol-7-yl)Methyl Styryl Sulfones. Journal of Chemical Research 2010. [DOI: 10.3184/030823410x12652994990526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A facile and an efficient one-pot synthesis of (E)-styryl sulfones is described by condensation of 2-(chloromethyl)benz-imidazoles or 7-(chloromethyl)-6H-imidazo[4,5-e][2,1,3]benzothiadiazole or benzyl bromides with sodium (E)-styryl sulfinates in DMF gave corresponding styryl sulfones. They have been prepared in good yields, in the absence of any catalyst.
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Affiliation(s)
- Nalajam Guravaiah
- Department of Chemistry, National Institute of Technology, Warangal-506 004, A.P., India
| | - Vedula Rajeswar Rao
- Department of Chemistry, National Institute of Technology, Warangal-506 004, A.P., India
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Ruiz VR, Corma A, Sabater MJ. New route for the synthesis of benzimidazoles by a one-pot multistep process with mono and bifunctional solid catalysts. Tetrahedron 2010; 66:730-5. [DOI: 10.1016/j.tet.2009.11.048] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Dabhade SK, Bora RO, Farooqui M, Gill CH. DMP (1,1,1-Triacetoxy-1,1-dihydro-1,2-benziodoxol-3(1H)-one): A novel catalyst for synthesis of 2-substituted benzimidazoles derivatives. CHINESE CHEM LETT 2009; 20:893-7. [DOI: 10.1016/j.cclet.2009.01.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abstract
Differently substituted benzimidazoles have been synthesised from o-phenylenediamine and arylaldehydes or arylmethylene-malononitriles absorbed on silica gel. The reaction was carried out by intermittent grinding or by a microwave-assisted technique under solvent- and catalyst-free conditions giving good yields of the products.
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Affiliation(s)
- Chuanming Yu
- Key Laboratory of Pharmaceutical Engineering of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Peng Guo
- Key Laboratory of Pharmaceutical Engineering of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Can Jin
- Key Laboratory of Pharmaceutical Engineering of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Weike Su
- Key Laboratory of Pharmaceutical Engineering of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
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Sharghi H, Aberi M, Doroodmand MM. Reusable Cobalt(III)-Salen Complex Supported on Activated Carbon as an Efficient Heterogeneous Catalyst for Synthesis of 2-Arylbenzimidazole Derivatives. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800317] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bigdeli MA, Dostmohammadi H, Nemati F, Mahdavinia GH. A simple and efficient procedure for the synthesis of benzimidazoles using trichloroisocyanuric acid (TCCA) as the oxidant. J Heterocycl Chem 2008. [DOI: 10.1002/jhet.5570450443] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Dubey PK, Prasada Reddy PVV. Unexpected Regiospecific Reduction of the Double Bond by NaBH4 in 2‐(1‐Methyl/1H‐benzimidazole‐2‐yl)‐3‐aryl‐acrylonitrile. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397910701397177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- P. K. Dubey
- a Department of Chemistry , College of Engineering, J N T University , Hyderabad, AP, India
| | - P. V. V. Prasada Reddy
- a Department of Chemistry , College of Engineering, J N T University , Hyderabad, AP, India
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Ramachary DB, Reddy GB. Towards organo-click reactions: development of pharmaceutical ingredients by using direct organocatalytic bio-mimetic reductions. Org Biomol Chem 2006; 4:4463-8. [PMID: 17268640 DOI: 10.1039/b612611a] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Economic and environmentally friendly bio-mimetic one-pot three and four-component Knoevenagel-hydrogenation (K-H), five-component Knoevenagel-hydrogenation-alkylation (K-H-A) and six-component Knoevenagel-hydrogenation-alkylation-Huisgen cycloaddition (K-H-A-HC) reactions of aldehydes, CH-acids, o-phenylenediamine, alkyl halides and azides using proline, proline-metal carbonate and proline-metal carbonate-Cu(I)-catalysis, respectively have been developed. Many of K-H and K-H-A compounds have direct application in pharmaceutical chemistry.
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Yutilov YM. Imidazopyridines: 1- and 3-Deazapurines. ADVANCES IN HETEROCYCLIC CHEMISTRY 2005. [DOI: 10.1016/s0065-2725(05)89004-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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46
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Hussenether T, Hübner H, Gmeiner P, Troschütz R. Clozapine derived 2,3-dihydro-1H-1,4- and 1,5-benzodiazepines with D4 receptor selectivity: synthesis and biological testing. Bioorg Med Chem 2004; 12:2625-37. [PMID: 15110844 DOI: 10.1016/j.bmc.2004.03.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2003] [Accepted: 03/10/2004] [Indexed: 12/25/2022]
Abstract
Novel 4-arylpiperazin-1-yl-substituted 2,3-dihydro-1H-1,4- and 1H-1,5-benzodiazepines and their aza-analogues were synthesized as debenzoclozapine derivatives for evaluation as potential D4-ligands. While Ki values of some of the title compounds came within the range of clozapine, they showed an impressively greater selectivity over other dopamine receptor subtypes, especially D2. For the most promising compounds, intrinsic activity and binding properties to serotonin 5-HT1A and 5-HT2 were also determined.
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Affiliation(s)
- Thomas Hussenether
- Department of Medicinal Chemistry, Emil Fischer Center, Friedrich-Alexander University, Schuhstrasse 19, D-91052 Erlangen, Germany
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Anzini M, Cappelli A, Vomero S, Giorgi G, Langer T, Bruni G, Romeo MR, Basile AS. Molecular basis of peripheral vs central benzodiazepine receptor selectivity in a new class of peripheral benzodiazepine receptor ligands related to alpidem. J Med Chem 1996; 39:4275-84. [PMID: 8863805 DOI: 10.1021/jm960325j] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Alpidem (1), the anxiolytic imidazopyridine, has nanomolar binding affinity for both the central benzodiazepine receptor (CBR) and the peripheral benzodiazepine receptor (PBR). A novel class of PBR ligands related to alpidem has been designed by comparing the interaction models of alpidem with PBR and CBR. Several compounds in this class have shown high selectivity for PBR vs CBR, and the selectivity has been discussed in terms of interaction models. The binding behavior of the three selected compounds was extensively studied by competition and saturation assays, and the results suggest that they are capable of recognizing two sites labeled by [3H]PK11195. The molecular structure of one of the most active compounds (4e) has been determined by X-ray diffraction and compared with that of alpidem. Molecular modeling studies suggest that the bioactive conformation of 4e is likely to be very similar to the conformation found in the crystal.
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Affiliation(s)
- M Anzini
- Dipartimento Farmaco Chimico Technologico, Università di Siena, Italy
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