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Microwave assisted one pot synthesis of 2-alkyl amino benzimidazoles, 2-alkyl amino benzoxazoles and 2-alkyl amino benzthiazoles by using various carbodiimides. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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2
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Bano K, Kisan DA, Panda TK. Facile Synthesis of Benzimidazole and Benzothiazole Compounds Mediated by Zinc Precatalyst Supported by Iminopyrrole‐Morpholine Ligand. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kulsum Bano
- IITH: Indian Institute of Technology Hyderabad Chemistry KandiSangareddy 502285 INDIA
| | - Devadkar Ajitrao Kisan
- IITH: Indian Institute of Technology Hyderabad Chemistry KandiSangareddy 502285 Hyderabad INDIA
| | - Tarun K. Panda
- IITH: Indian Institute of Technology Hyderabad Chemistry KandiSangareddy 502285 Hyderabad INDIA
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Sharghi H, Aboonajmi J, Aberi M, Shekouhy M. Amino Acids: Nontoxic and Cheap Alternatives for Amines for the Synthesis of Benzoxazoles through the Oxidative Functionalization of Catechols. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901096] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Hashem Sharghi
- Department of Chemistry, College of SciencesShiraz University Shiraz 71454 Iran
| | - Jasem Aboonajmi
- Department of Chemistry, College of SciencesShiraz University Shiraz 71454 Iran
| | - Mahdi Aberi
- Department of Chemical and Materials Engineering, Faculty of Shahid Rajaee, Shiraz BranchTechnical and Vocational University (TVU) Shiraz Iran
| | - Mohsen Shekouhy
- Department of Chemistry, College of SciencesShiraz University Shiraz 71454 Iran
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Liu J, Morgan S, Hoover JM. Cobalt‐Catalyzed Aerobic Oxidative Cyclization of 2‐Aminoanilines with Isonitriles: Facile Access to 2‐Aminobenzimidazoles. ChemCatChem 2020. [DOI: 10.1002/cctc.201902011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jiaqi Liu
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown WV 26506 USA
| | - Sarah Morgan
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown WV 26506 USA
| | - Jessica M. Hoover
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown WV 26506 USA
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Mani GS, Donthiboina K, Shaik SP, Shankaraiah N, Kamal A. Iodine-mediated C-N and N-N bond formation: a facile one-pot synthetic approach to 1,2,3-triazoles under metal-free and azide-free conditions. RSC Adv 2019; 9:27021-27031. [PMID: 35528599 PMCID: PMC9070426 DOI: 10.1039/c9ra06005g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 08/21/2019] [Indexed: 01/01/2023] Open
Abstract
A novel strategy towards the synthesis of 1,4-disubstituted 1,2,3-triazoles via C–N and N–N bond formation has been demonstrated under transition metal-free and azide-free conditions. These 1,2,3-triazoles were obtained in a regioselective manner from commercially available anilines, aryl alkenes/aryl alkynes and N-tosylhydrazines using I2 under O2 atmosphere. Broad substrate scope, milder reaction conditions, good to moderate yields and clean protocol are the notable features of the method. Moreover, this protocol is amenable for the generation of a library of medicinally important key building blocks. A novel strategy towards the synthesis of 1,4-disubstituted 1,2,3-triazoles via C–N and N–N bond formation has been demonstrated under transition metal-free and azide-free conditions.![]()
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Affiliation(s)
- Geeta Sai Mani
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Kavitha Donthiboina
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Siddiq Pasha Shaik
- Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
| | - Nagula Shankaraiah
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Ahmed Kamal
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India .,Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India .,School of Pharmaceutical Education and Research (SPER) Jamia Hamdard New Delhi 110062 India
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6
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Pattarawarapan M, Yamano D, Wiriya N, Phakhodee W. Metal-Free Synthesis of 2- N, N-Dialkylaminobenzoxazoles Using Tertiary Amines as the Nitrogen Source. J Org Chem 2019; 84:6516-6523. [PMID: 31017442 DOI: 10.1021/acs.joc.9b00797] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The unprecedented reaction of tertiary amines with 2(3 H)-benzoxazolones has been investigated. In the presence of the Ph3P-I2 reagent system, the reaction of both acyclic and cyclic aliphatic tertiary amines led to the formation of 2- N, N-dialkylaminobenzoxazoles with the selective cleavage of an alkyl group. Especially, N-(2-iodoethyl)piperazinyl derivatives were rapidly produced in good yields when using DABCO as the nitrogen source. Only in the cases when the nucleophilicity of the substrates exceeds that of the amine, competitive self-condensation of benzoxazolones then proceeds preferentially. 31P{1H}-NMR study suggested the involvement of an aryloxyphosphonium intermediate and/or possibly 2-iodobenzoxazole which activates the C-2 position of benzoxazolones toward nucleophilic aromatic substitution.
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Affiliation(s)
- Mookda Pattarawarapan
- Department of Chemistry, Faculty of Science , Chiang Mai University , Chiang Mai 50200 , Thailand
- Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Faculty of Science , Chiang Mai University , Chiang Mai 50200 , Thailand
| | - Dolnapa Yamano
- Department of Chemistry, Faculty of Science , Chiang Mai University , Chiang Mai 50200 , Thailand
| | - Nitaya Wiriya
- Department of Chemistry, Faculty of Science , Chiang Mai University , Chiang Mai 50200 , Thailand
| | - Wong Phakhodee
- Department of Chemistry, Faculty of Science , Chiang Mai University , Chiang Mai 50200 , Thailand
- Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Faculty of Science , Chiang Mai University , Chiang Mai 50200 , Thailand
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7
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Tankam T, Srisa J, Sukwattanasinitt M, Wacharasindhu S. Microwave-Enhanced On-Water Amination of 2-Mercaptobenzoxazoles To Prepare 2-Aminobenzoxazoles. J Org Chem 2018; 83:11936-11943. [DOI: 10.1021/acs.joc.8b01824] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Theeranon Tankam
- Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University Bangkok 10330, Thailand
| | - Jakkrit Srisa
- Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University Bangkok 10330, Thailand
| | - Mongkol Sukwattanasinitt
- Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University Bangkok 10330, Thailand
| | - Sumrit Wacharasindhu
- Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University Bangkok 10330, Thailand
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Mani GS, Shaik SP, Tangella Y, Bale S, Godugu C, Kamal A. A facile I2-catalyzed synthesis of imidazo[1,2-a]pyridines via sp3 C–H functionalization of azaarenes and evaluation of anticancer activity. Org Biomol Chem 2017; 15:6780-6791. [DOI: 10.1039/c7ob01384a] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A three component synthetic protocol has been developed for the synthesis of medicinally important imidazo[1,2-a]pyridines via the iodine-catalyzed oxidative amination of benzylic C–H bonds of azaarenes. The synthesized compounds were evaluated for their anti-cancer activity.
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Affiliation(s)
- Geeta Sai Mani
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
- Medicinal Chemistry & Pharmacology
| | - Siddiq Pasha Shaik
- Medicinal Chemistry & Pharmacology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Yellaiah Tangella
- Medicinal Chemistry & Pharmacology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Swarna Bale
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
| | - Chandraiah Godugu
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
| | - Ahmed Kamal
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
- Medicinal Chemistry & Pharmacology
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9
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Tangella Y, Manasa KL, Sathish M, Alarifi A, Kamal A. Phenyliodonium Diacetate Mediated One-Pot Synthesis of Benzimidazoles and Quinazolinones from Benzylamines. ChemistrySelect 2016. [DOI: 10.1002/slct.201600772] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yellaiah Tangella
- Medicinal Chemistry & Pharmacology; CSIR-Indian Institute of Chemical Technology; Hyderabad- 500 007 India
- Academy of Scientific and Innovative Research; CSIR-Indian Institute of Chemical Technology; Hyderabad - 500 007 India
| | - Kesari Lakshmi Manasa
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Hyderabad- 500 037 India
| | - Manda Sathish
- Medicinal Chemistry & Pharmacology; CSIR-Indian Institute of Chemical Technology; Hyderabad- 500 007 India
| | - Abdullah Alarifi
- Catalytic Chemistry Research Chair; Chemistry Department; College of Science; King Saud University; Riyadh 11451 Saudi Arabia
| | - Ahmed Kamal
- Medicinal Chemistry & Pharmacology; CSIR-Indian Institute of Chemical Technology; Hyderabad- 500 007 India
- Academy of Scientific and Innovative Research; CSIR-Indian Institute of Chemical Technology; Hyderabad - 500 007 India
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Hyderabad- 500 037 India
- Catalytic Chemistry Research Chair; Chemistry Department; College of Science; King Saud University; Riyadh 11451 Saudi Arabia
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Chen X, Ji F, Zhao Y, Liu Y, Zhou Y, Chen T, Yin SF. Copper-Catalyzed Aerobic Oxidative C(aryl)OH Bond Functionalization of Catechols with Amines Affording Benzoxazoles. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500515] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Morofuji T, Shimizu A, Yoshida J. Electrochemical Intramolecular CH Amination: Synthesis of Benzoxazoles and Benzothiazoles. Chemistry 2015; 21:3211-4. [DOI: 10.1002/chem.201406398] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Indexed: 01/23/2023]
Affiliation(s)
- Tatsuya Morofuji
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo‐ku, Kyoto 615‐8510 (Japan)
| | - Akihiro Shimizu
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo‐ku, Kyoto 615‐8510 (Japan)
| | - Jun‐ichi Yoshida
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo‐ku, Kyoto 615‐8510 (Japan)
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12
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Gopalaiah K, Chandrudu SN. Iron(ii) bromide-catalyzed oxidative coupling of benzylamines with ortho-substituted anilines: synthesis of 1,3-benzazoles. RSC Adv 2015. [DOI: 10.1039/c4ra12490a] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An iron(ii) bromide-catalyzed oxidative coupling of benzylamines with 2-amino/hydroxy/mercapto-anilines has been developed, allowing the synthesis of a diversity of substituted 1,3-benzazoles in good to excellent yields.
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McCulloch MWB, Berrue F, Haltli B, Kerr RG. One-pot syntheses of pseudopteroxazoles from pseudopterosins: a rapid route to non-natural congeners with improved antimicrobial activity. JOURNAL OF NATURAL PRODUCTS 2011; 74:2250-6. [PMID: 21978379 DOI: 10.1021/np2006555] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Rapid one-pot methodologies to prepare pseudopteroxazole (1) and novel congeners from abundant natural pseudopterosins have been devised. This is highlighted here with the first synthesis of the marine natural product homopseudopteroxazole (2) utilizing a novel, silver(I)-mediated catechol to benzoxazole transformation. Pseudopteroxazoles and isopseudopteroxazoles exhibit potent activity against a range of important Gram-positive pathogens including Mycobacterium spp. and vancomycin-resistant Enterococcus faecium. Several non-natural pseudopteroxazoles exhibited strong activity against methicillin-resistant Staphylococcus aureus, thereby displaying a broader spectrum of antibiotic activity compared to pseudopteroxazole.
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Affiliation(s)
- Malcolm W B McCulloch
- Department of Chemistry, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI C1A 4P3, Canada
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