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Bakthadoss M, Aina OS, Reddy TT, Izunobi JU, Familoni OB. Mono and di ortho-C-H acetoxylation of 2-aryloxyquinoline-3-carbaldehydes. RSC Adv 2024; 14:13306-13310. [PMID: 38655482 PMCID: PMC11037237 DOI: 10.1039/d4ra01289e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 04/08/2024] [Indexed: 04/26/2024] Open
Abstract
2-Aryloxyquinolines are well known for various biological activities. In this report, we have developed a novel protocol for introducing an acetoxy functional group on the aryl sp2 carbon of 2-aryloxyquinoline-3-carbaldehyde using a palladium catalyst for the first time. Interestingly, this C-H acetoxylation reaction is highly chemo- and site-selective. By modifying the reaction conditions, mono or di ortho-C-H acetoxylation products have been synthesized selectively with good yields and with good functional group tolerance.
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Affiliation(s)
| | - Oluwafemi S Aina
- Department of Chemistry, Pondicherry University Pondicherry 605 014 India
- Department of Chemistry, University of Lagos Lagos Nigeria
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2
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Krishna Rao MV, Kareem S, Vali SR, Subba Reddy BV. Recent advances in metal directed C-H amidation/amination using sulfonyl azides and phosphoryl azides. Org Biomol Chem 2023; 21:8426-8462. [PMID: 37831479 DOI: 10.1039/d3ob01160g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Transition metal-catalyzed C-N bond formation reactions have gained popularity as a method for selectively transforming common C-H bonds into N-functionalized molecules. This approach is particularly useful for synthesizing aminated molecules, which require aminating reagents and amidated building blocks. Over the past two decades, significant advancements have been achieved in transition-metal-catalyzed C-H functionalization, with organic azides emerging as promising amino sources and internal oxidants. This review focuses on recent developments in utilizing sulfonyl and phosphoryl azides as building blocks for directed intra- and intermolecular C-H functionalization reactions. Specifically, it discusses methods for synthesizing sulfonamidates and phosphoramidates using sulfonyl and phosphoryl azides, respectively. The article highlights the potential of C-H functionalization reactions with organic azides for efficiently and sustainably synthesizing N-functionalized molecules, providing valuable insights into the latest advancements in this field.
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Affiliation(s)
- M V Krishna Rao
- Department of Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India.
| | - Shaik Kareem
- Department of Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India.
| | - Shaik Ramjan Vali
- Department of Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India.
| | - B V Subba Reddy
- Department of Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India.
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Bakthadoss M, Reddy TT. Distal meta-C-H functionalization of α-substituted cinnamates. Chem Sci 2023; 14:5880-5886. [PMID: 37293646 PMCID: PMC10246684 DOI: 10.1039/d2sc06206b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 02/20/2023] [Indexed: 11/03/2023] Open
Abstract
Development of a novel strategy for the palladium-catalyzed selective meta-C-H activation of α-substituted cinnamates and their heterocyclic analogues with various alkenes using nitrile as a directing group (DG) has been described. Importantly, we introduced naphthoquinone, benzoquinones, maleimides and sulfolene as coupling partners in the meta-C-H activation reaction for the first time. Notably, allylation, acetoxylation and cyanation were also achieved through distal meta-C-H functionalization. This novel protocol also includes the coupling of various olefin-tethered bioactive molecules with high selectivity.
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Bakthadoss M, Reddy TT, Agarwal V, Sharada DS. Ester-directed orthogonal dual C-H activation and ortho aryl C-H alkenylation via distal weak coordination. Chem Commun (Camb) 2022; 58:1406-1409. [PMID: 34994762 DOI: 10.1039/d1cc06097j] [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
An unprecedented orthogonal cross-coupling between aromatic C(sp2) and aliphatic olefinic C(sp2) carbons of two same molecules via dual C-H bond activation in an intermolecular fashion has been developed using a distal ester-directing group. This new coupling reaction led to the synthesis of the highly functionalized 1,3-diaryl molecular architecture in very good yields and with high chemo- and regioselectivities. In addition, using ester as the distal directing group, ortho C-H olefination of α-methyl aryl acrylates and cinnamic esters with various alkenes has been achieved in very good yields and with a wide range of substrate scope.
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Affiliation(s)
| | | | - Vishal Agarwal
- Department of Chemistry, Pondicherry University, Pondicherry-605014, India.
| | - Duddu S Sharada
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Telangana-502285, India
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5
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Jiang Y, Mao Z, Guan Y, Pan H, Zhang X. Ru-catalyzed direct arene C–H amidation of pyrrolo[2,3-d]pyrimidines with sulfonyl azides. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2021.153569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Cao XT, Wei SN, Sun HT, Li M, Zheng ZL, Wang G. Iridium-catalyzed regioselective C-H sulfonamidation of 1,2,4-thiadiazoles with sulfonyl azides in water. RSC Adv 2021; 11:22000-22004. [PMID: 35480792 PMCID: PMC9034132 DOI: 10.1039/d1ra04450h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 06/14/2021] [Indexed: 12/20/2022] Open
Abstract
We have developed a regioselective C-N cross-coupling of 1,2,4-thiadiazoles with sulfonyl azides through iridium catalysis in water. This method tactically linked the 1,2,4-thiadiazoles and sulfonamides together, and the novel molecules increased the diversity of 1,2,4-thiadiazoles which may have potential applications.
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Affiliation(s)
- Xian-Ting Cao
- College of Medical Engineering, Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
| | - Su-Ning Wei
- College of Medical Engineering, Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
| | - Hao-Tian Sun
- College of Medical Engineering, Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
| | - Meng Li
- College of Medical Engineering, Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
| | - Zuo-Ling Zheng
- College of Medical Engineering, Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
| | - Guannan Wang
- College of Medical Engineering, Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
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7
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Singh H, Sen C, Suresh E, Panda AB, Ghosh SC. C-H Amidation and Amination of Arenes and Heteroarenes with Amide and Amine using Cu-MnO as a Reusable Catalyst under Mild Conditions. J Org Chem 2021; 86:3261-3275. [PMID: 33522804 DOI: 10.1021/acs.joc.0c02603] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An atom-economical and efficient route for the direct amidation and amination of aryl C-H bonds using our synthesized recyclable heterogeneous Cu-MnO catalyst is reported here. The direct C-H amidation was carried out using a simple amide without any preactivated coupling partner, and simple air was used as the sole oxidant. The reaction proceeds very smoothly with a broad range of substrates containing numerous functional groups in very good to excellent yields. Direct C-H aminations with a secondary amine were carried out under base-, ligand-, and external oxidant-free conditions in very good to excellent yields in very mild conditions. Both the amidation and amination can be scaled up on a gram scale with similar yields. The major advantage is that our catalyst is recyclable and reused several times without any significant loss of reactivity.
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Affiliation(s)
- Harshvardhan Singh
- Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Chiranjit Sen
- Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Eringathodi Suresh
- Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Asit B Panda
- Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Subhash C Ghosh
- Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
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Liu Z, Ebadi A, Toughani M, Mert N, Vessally E. Direct sulfonamidation of (hetero)aromatic C-H bonds with sulfonyl azides: a novel and efficient route to N-(hetero)aryl sulfonamides. RSC Adv 2020; 10:37299-37313. [PMID: 35521237 PMCID: PMC9057145 DOI: 10.1039/d0ra04255b] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 09/28/2020] [Indexed: 12/26/2022] Open
Abstract
N-Aryl sulfonamides belong to a highly important class of organosulfur compounds which are found in a number of FDA-approved drugs such as dofetilide, dronedarone, ibutilide, sotalol, sulfadiazine, sulfamethizole, vemurafenib, and many more. There is therefore continuing interest in the development of novel and convenient protocols for the preparation of these pharmaceutically important compounds. Recently, direct sulfonamidation of (hetero)aromatic C–H bonds with easily available sulfonyl azides has emerged as an attractive and powerful strategy to access N-(hetero)aryl sulfonamides where non-toxic nitrogen gas forms as the sole by-product. This review highlights recent advances and developments (2012–2020) in this fast growing research area with emphasis on the mechanistic features of the reactions. N-Aryl sulfonamides belong to a highly important class of organosulfur compounds which are found in a number of FDA-approved drugs such as dofetilide, dronedarone, ibutilide, sotalol, sulfadiazine, sulfamethizole, vemurafenib, and many more.![]()
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Affiliation(s)
- Zhi Liu
- School of Electrical and Automation Engineering, East China Jiaotong University Nanchang 330013 China
| | - Abdolghaffar Ebadi
- Department of Agriculture, Jouybar Branch, Islamic Azad University Jouybar Iran
| | - Mohsen Toughani
- Department of Fishery, Babol Branch, Islamic Azad University Babol Iran
| | - Nihat Mert
- Department of Biochemistry, Faculty of Veterinary Medicine, University of Yuzuncu Yil 65080, Van Turkey
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Bakthadoss M, Reddy TT, Sharada DS. Ruthenium-catalyzed, site-selective C-H activation: access to C5-substituted azaflavanone. RSC Adv 2020; 10:31570-31574. [PMID: 35520642 PMCID: PMC9056431 DOI: 10.1039/d0ra06580c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 08/17/2020] [Indexed: 11/21/2022] Open
Abstract
A site-selective ruthenium-catalyzed keto group assisted C–H bond activation of 2-aryl tetrahydroquinoline (azaflavanone) derivatives has been achieved with a variety of alkenes for the first time. A wide range of substrates was utilized for the synthesis of a wide variety of alkenylated azaflavanones. This simple and efficient protocol provides the C5-substituted azaflavanone derivatives in high yields with a broad range of functional group tolerance. Further, the C5-alkenylated products were converted into substituted 2-aryl quinoline derivatives in good yields. A site-selective ruthenium-catalyzed keto group assisted C–H bond activation of 2-aryl tetrahydroquinoline (azaflavanone) derivatives has been achieved with a variety of alkenes for the first time.![]()
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Affiliation(s)
| | | | - Duddu S Sharada
- Department of Chemistry, Indian Institute of Technology Hyderabad Telangana-502285 India
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