1
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Mishra K, Hendrix I, Gerardo J, Yamamoto N, Yan Y. Merging of Two Photoredox Cycles with One Perovskite Catalyst Achieving Dual Functionalization: N-Heterocyclization and Site-Selective Bromination of N-Arylamines. J Org Chem 2025; 90:4244-4253. [PMID: 40080873 PMCID: PMC11970103 DOI: 10.1021/acs.joc.4c03045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2025]
Abstract
Dual functionalization in organic synthesis represents a powerful strategy aimed at achieving multiple transformations within a single reaction cycle, thereby streamlining synthetic processes, enhancing efficiency, and imparting economic paths for complex molecules. Here, we report a heterogeneous perovskite nanocrystal (NC) photocatalytic system that can simultaneously drive two photoredox cycles in a single reaction. The dual process incorporates two distinct functional groups (N-heterocycles and bromines) into N-arylamines under the influence of a single catalyst (CsPbBr3 NCs), allowing for the concurrent formation of two distinct architectures of 3-bromo-N-arylindoles. Mechanistically, long-lived charge separation and charge carrier accumulation at the NC surface enable perovskite to drive these two photoredox cycles simultaneously. The dual approach exploits light-induced holes to drive an amine oxidation in one cycle (I) and cooperatively utilizes dibromomethane (CH2Br2), a solvent-grade mild reagent for site-selective bromination, to achieve the other photoredox cycle (II). We find that chiral perovskite induces enantioselective axial C-N bond formation, but is inactive for axial C-C bond formation of arylindoles. Merging two photoredox cycles simultaneously to achieve dual functionalization is rare; thus, the perovskite NC photocatalysis not only aligns with the principles of green chemistry but also holds immense potential for the rapid and economical design of complex molecules.
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Affiliation(s)
- Kanchan Mishra
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, California 92182, United States
| | - Isaac Hendrix
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, California 92182, United States
| | - Jesse Gerardo
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, California 92182, United States
| | - Nobuyuki Yamamoto
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, California 92182, United States; Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Yong Yan
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, California 92182, United States
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2
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Roper NJ, Campbell ADG, Waddell PG, Brown AK, Ermanis K, Armstrong RJ. A stereodivergent multicomponent approach for the synthesis of C-N atropisomeric peptide analogues. Chem Sci 2024:d4sc04700a. [PMID: 39323517 PMCID: PMC11418089 DOI: 10.1039/d4sc04700a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2024] [Accepted: 09/15/2024] [Indexed: 09/27/2024] Open
Abstract
A four-component Ugi reaction is described for the stereoselective synthesis of novel C-N atropisomeric peptide analogues. Using this approach, a combination of simple, readily available starting materials (ortho-substituted anilines, aldehydes, carboxylic acids and isocyanides) could be combined to access complex products possessing both central and axial chirality in up to 92% yield and >95 : 5 d.r. Variation of the reaction temperature enabled the development of stereodivergent reactions capable of selectively targeting either diastereoisomer of a desired product from a single set of starting materials with high levels of stereocontrol. Detailed experimental and computational studies have been performed to probe the reaction mechanism and stereochemical outcome of these reactions. Preliminary studies show that novel atropisomeric scaffolds prepared using this method display inhibitory activity against M. tuberculosis with a significant difference in activity observed between different atropisomers.
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Affiliation(s)
- Natalie J Roper
- School of Natural and Environmental Sciences, Newcastle University Newcastle Upon Tyne NE1 7RU UK
| | - Aaron D G Campbell
- School of Natural and Environmental Sciences, Newcastle University Newcastle Upon Tyne NE1 7RU UK
| | - Paul G Waddell
- School of Natural and Environmental Sciences, Newcastle University Newcastle Upon Tyne NE1 7RU UK
| | - Alistair K Brown
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University Newcastle Upon Tyne NE2 4HH UK
| | - Kristaps Ermanis
- School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK
| | - Roly J Armstrong
- School of Natural and Environmental Sciences, Newcastle University Newcastle Upon Tyne NE1 7RU UK
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3
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Kano T, Uozumi R, Maruyama T, Tada N, Itoh A. Modular Synthesis of Tripeptide Analogs with an Aminobitriazole Skeleton Using Diynyl Benziodoxolone as a Trivalent Platform. J Org Chem 2024; 89:11761-11765. [PMID: 39082689 DOI: 10.1021/acs.joc.4c00999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
A new synthesis method of tripeptide analogs with an aminobitriazole skeleton was proposed. The method involves assembling three amino acid-derived modules at the amino group site and onto a triisopropylsilyl diynyl benziodoxolone by copper-catalyzed electrophilic diynylation of amino acid-derived sulfonamides, chemoselective azide-alkyne cycloadditions with amino acid-derived azides, and deprotection. Various complex aminobitriazoles substituted with pyrene, nucleoside, and N-acetylglucosamine were also synthesized. The produced aminobitriazoles have three sp3 chiral centers and a C-N axial chirality.
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Affiliation(s)
- Takashi Kano
- Laboratory of Pharmaceutical Synthetic Chemistry, Faculty of Pharmaceutical Science, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Ryusei Uozumi
- Laboratory of Pharmaceutical Synthetic Chemistry, Faculty of Pharmaceutical Science, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | | | - Norihiro Tada
- Laboratory of Pharmaceutical Synthetic Chemistry, Faculty of Pharmaceutical Science, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Akichika Itoh
- Laboratory of Pharmaceutical Synthetic Chemistry, Faculty of Pharmaceutical Science, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
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4
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Liu Y, Gu X, Zhang X, Xu M, Zhang Z, Liang T. Iodine-mediated oxidative triple functionalization of indolines with azoles and diazonium salts. Chem Commun (Camb) 2024; 60:4613-4616. [PMID: 38587256 DOI: 10.1039/d4cc00856a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
We report an innovative synthetic strategy for the generation of polysubstituted indoles from indolines, aryldiazonium salts, and azoles. The methodology encompasses an electrophilic substitution reaction affording C5-indoline intermediates which undergo an iodine-mediated oxidative transformation coupled with C-H functionalization to yield the indole derivatives.
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Affiliation(s)
- Yifeng Liu
- Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China.
| | - Xiaoting Gu
- Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China.
| | - Xiaoxiang Zhang
- Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China.
| | - Meilan Xu
- Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China.
| | - Zhuan Zhang
- Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China.
| | - Taoyuan Liang
- Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China.
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5
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Zhang M, Zhao P, Wu D, Qiu Z, Zhao C, Zhang W, Li F, Zhou J, Liu L. Brønsted Acid-Catalyzed Reaction of N-arylnaphthalen-2-amines with Quinone Esters for the Construction of Carbazole and C-N Axially Chiral Carbazole Derivatives. J Org Chem 2023. [PMID: 36812409 DOI: 10.1021/acs.joc.2c02518] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
We demonstrated here an efficient synthetic method of carbazole derivatives from readily available N-arylnaphthalen-2-amines and quinone esters catalyzed by Brønsted acid. With this strategy, a series of carbazole derivatives were obtained in good to excellent yields (76 to >99) under mild conditions. Large scale reaction illustrated the synthetic utility of this protocol. Meanwhile, a series of C-N axially chiral carbazole derivatives were also constructed in moderate to good yields (36-89% yield) with moderate to excellent atroposelectivities (44-94% ee) by using chiral phosphoric acid as a catalyst, which provides a novel strategy for the atroposelective construction of C-N axially chiral compounds and a new member of the C-N atropisomers.
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Affiliation(s)
- Mingliang Zhang
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, Henan 476000, China
| | - Pin Zhao
- College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Dongqing Wu
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, Henan 476000, China
| | - Zhichao Qiu
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, Henan 476000, China
| | - Chenyue Zhao
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, Henan 476000, China
| | - Wenyu Zhang
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, Henan 476000, China
| | - Feng Li
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, Henan 476000, China
| | - Jing Zhou
- Chongqing Research Center for Pharmaceutical Engineering, Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Lantao Liu
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, Henan 476000, China.,College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450052, China
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6
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Yu C, E R, Zhang XW, Hu WQ, Bao G, Li Y, Liu Y, He Z, Li J, Ma W, Mou LY, Wang R, Sun W. NaClO-Mediated Cross Installation of Indoles and Azoles Benefits Anticancer Hit Discovery. ChemMedChem 2023; 18:e202200651. [PMID: 36585386 DOI: 10.1002/cmdc.202200651] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/26/2022] [Accepted: 12/30/2022] [Indexed: 01/01/2023]
Abstract
Innovations in synthetic chemistry have a profound impact on the drug discovery process, and will always be a necessary driver of drug development. As a result, it is of significance to develop novel simple and effective synthetic installation of medicinal modules to promote drug discovery. Herein, we have developed a NaClO-mediated cross installation of indoles and azoles, both of which are frequently encountered in drugs and natural products. This effective toolbox provides a convenient synthetic route to access a library of N-linked 2-(azol-1-yl) indole derivatives, and can be used for late-stage modification of drugs, natural products and peptides. Moreover, biological screening of the library has revealed that several adducts showed promising anticancer activities against A549 and NCI-H1975 cells, which give us a hit for anticancer drug discovery.
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Affiliation(s)
- Changjun Yu
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Ruiyao E
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Xiao-Wei Zhang
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Wen-Qian Hu
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Guangjun Bao
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Yiping Li
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Yuyang Liu
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Zeyuan He
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Jingyue Li
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Wen Ma
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Ling-Yun Mou
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
| | - Rui Wang
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China.,State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Xian Nong Tan Street, Beijing, 100050, P. R. China
| | - Wangsheng Sun
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, Gansu, P. R. China
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7
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Wang Y, Yan J, Jiang Y, Wei Z, Tu Z, Dong C, Lu T, Chen Y, Feng J. Atroposelective Amination of Indoles via Chiral Center Induced Chiral Axis Formation. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27249008. [PMID: 36558141 PMCID: PMC9783779 DOI: 10.3390/molecules27249008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 12/09/2022] [Accepted: 12/11/2022] [Indexed: 12/24/2022]
Abstract
The construction of an N-C chiral axis for N-aryl indole derivatives is meaningful as they widely exist in functionalized molecules. This work provides a novel method for this purpose via amination of amino acid derivatives at the C2 position of the indole and chiral center induced chiral axis formation. The protocol of this transformation is easily accessible, not requiring metal or an organic chiral catalyst, endowing this method with great potential in the construction of axis chiral N-aryl indoles.
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8
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Fang S, Chen W, Jiang H, Ma R, Wu W. Palladium-catalyzed oxidative C-H activation/annulation of N-alkylanilines with bromoalkynes: access to functionalized 3-bromoindoles. Chem Commun (Camb) 2022; 58:9666-9669. [PMID: 35946388 DOI: 10.1039/d2cc03298h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A straightforward approach to the synthesis of 3-bromoindoles via palladium-catalyzed oxidative C-H activation/annulation of N-alkylanilines with bromoalkynes has been described. This protocol features high atom economy, excellent chemo- and regioselectivities, and good functional group tolerance. Moreover, the resultant 3-bromoindoles can be transformed to various functionalized indole derivatives, which demonstrates the practicability of this method in organic synthesis.
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Affiliation(s)
- Songjia Fang
- State Key Laboratory of Luminescent Materials and Devices, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Wenhao Chen
- State Key Laboratory of Luminescent Materials and Devices, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Huanfeng Jiang
- State Key Laboratory of Luminescent Materials and Devices, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Ruize Ma
- State Key Laboratory of Luminescent Materials and Devices, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Wanqing Wu
- State Key Laboratory of Luminescent Materials and Devices, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
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9
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Liang H, Zhu G, Pu X, Qiu L. Copper-Catalyzed Enantioselective C-H Arylation between 2-Arylindoles and Hypervalent Iodine Reagents. Org Lett 2021; 23:9246-9250. [PMID: 34806895 DOI: 10.1021/acs.orglett.1c03596] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The copper-catalyzed enantioselective C-H arylation between 2-arylindoles and hypervalent iodine reagents has been successfully developed, which provides a convenient and economical route to the highly atroposelective synthesis of axially chiral indole derivatives with a 2-aryl structure (up to 99% ee). Density functional theory calculations and wave function analysis show that the key "sandwich" intermediate leads to high enantioselectivity of the reaction.
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Affiliation(s)
- Hao Liang
- School of Chemistry, Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, Sun Yat-Sen University, Guangzhou 510006, China
| | - Guoxun Zhu
- Electronic/IT-related Chemicals Lab, Guangdong Institute of Analysis, Guangzhou 510070, China
| | - Xiaoyun Pu
- School of Chemistry, Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, Sun Yat-Sen University, Guangzhou 510006, China
| | - Liqin Qiu
- School of Chemistry, Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, Sun Yat-Sen University, Guangzhou 510006, China
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10
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Jagadeesh C, Mondal B, Pramanik S, Das D, Saha J. Unprecedented Reactivity of γ‐Amino Cyclopentenone Enables Diversity‐Oriented Access to Functionalized Indoles and Indole‐Annulated Ring Structures. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016015] [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)
- Chenna Jagadeesh
- Division of Molecular Synthesis & Drug Discovery Centre of Biomedical Research (CBMR) SGPGIMS Campus Raebareli Road, Lucknow 226014 Uttar Pradesh India
| | - Biplab Mondal
- Division of Molecular Synthesis & Drug Discovery Centre of Biomedical Research (CBMR) SGPGIMS Campus Raebareli Road, Lucknow 226014 Uttar Pradesh India
| | - Sourav Pramanik
- Division of Molecular Synthesis & Drug Discovery Centre of Biomedical Research (CBMR) SGPGIMS Campus Raebareli Road, Lucknow 226014 Uttar Pradesh India
| | - Dinabandhu Das
- School of Physical Sciences Jawaharlal Nehru University New Delhi India
| | - Jaideep Saha
- Division of Molecular Synthesis & Drug Discovery Centre of Biomedical Research (CBMR) SGPGIMS Campus Raebareli Road, Lucknow 226014 Uttar Pradesh India
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11
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Jagadeesh C, Mondal B, Pramanik S, Das D, Saha J. Unprecedented Reactivity of γ-Amino Cyclopentenone Enables Diversity-Oriented Access to Functionalized Indoles and Indole-Annulated Ring Structures. Angew Chem Int Ed Engl 2021; 60:8808-8812. [PMID: 33527571 DOI: 10.1002/anie.202016015] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/28/2021] [Indexed: 12/13/2022]
Abstract
Observation of an unexpected, Lewis acid promoted displacement of latent reactive γ-amino group on cyclopentenone presented unparalleled opportunity for enone functionalization and annulations with indole derivatives, which is developed in the current study. Herein, a vast range of C3/N-indolyl enones and indole alkaloid-like compound were accessed in excellent yields (up to 99 %) and selectivity through a one-pot operation. The mechanism most likely involves an unprecedented trait of Piancatelli-type rearrangement where influence of the gem-diaryl group appeared crucial.
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Affiliation(s)
- Chenna Jagadeesh
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Biplab Mondal
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Sourav Pramanik
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Dinabandhu Das
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Jaideep Saha
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
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12
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Lei N, Shen Y, Li Y, Tao P, Yang L, Su Z, Zheng K. Electrochemical Iodoamination of Indoles Using Unactivated Amines. Org Lett 2020; 22:9184-9189. [PMID: 33185451 DOI: 10.1021/acs.orglett.0c03158] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An environmentally friendly electrochemical approach for iodoamination of various indole derivatives with a series of unactivated amines, amino acid derivatives, and benzotriazoles (more than 80 examples) has been developed. This strategy was further applied in late-stage functionalization of natural products and pharmaceuticals and gram-scale synthesis and radiosynthesis of 131I-labeled compounds. Fundamental insights into the mechanism of the reaction based on control experiments, density functional theory calculation, and cyclic voltammetry are provided.
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Affiliation(s)
- Ning Lei
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Yanling Shen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Yujun Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Pan Tao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Liquan Yang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Ke Zheng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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13
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Karjee P, Sarkar T, Kar S, Punniyamurthy T. Transition-Metal-Free Stereospecific Oxidative Annulative Coupling of Indolines with Aziridines. J Org Chem 2020; 85:8261-8270. [PMID: 32468818 DOI: 10.1021/acs.joc.0c00899] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Tandem C-N bond formation for the oxidative annulation of indolines with aziridines is accomplished employing the combination of DDQ and NaOCl at ambient conditions. Optically active aziridine can be coupled with high enantiomeric purity (>99% ee). The substrate scope, stereocontrol with the enantioenriched substrate, and scale-up are the important practical advantages.
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Affiliation(s)
- Pallab Karjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Tanumay Sarkar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Subhradeep Kar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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