1
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Xia D, Shi Y, Jiang L, Li Y, Kong J. Recent advances in the radical cascade reaction for constructing nitrogen heterocycles using azides as radical acceptors. Org Biomol Chem 2024; 22:5511-5523. [PMID: 38904322 DOI: 10.1039/d4ob00732h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
Due to the high conversion properties, azide compounds are widely utilized in organic synthesis. For instance, azide compounds readily release nitrogen to form a new N-C bond when they function as radical acceptors for the active intermediates in the reaction. Over the past decade, strategies employing azides as radical acceptors to construct nitrogen heterocycles have been extensively developed. This approach has emerged as a crucial method for synthesizing nitrogen heterocycles. Therefore, this paper provides a review of the research advancements in tandem cyclization reactions using azides as radical acceptors, summarizing the process of reaction design, exploration, reasoning of the mechanism, and prospects for further research of these reactions.
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Affiliation(s)
- Dong Xia
- College of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, P. R. China.
| | - Yun Shi
- College of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, P. R. China.
| | - Liying Jiang
- College of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, P. R. China.
| | - Yang Li
- School of Bioengineering, Huainan Normal University, Huainan, 232038, P. R. China.
| | - Jianfei Kong
- College of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, P. R. China.
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2
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Zhu YL, Dong YF, Wang SR, Li YG, Wu X, Ye LW. Nucleophile-Controlled Trapping of Gold Carbene by Nitriles and Water: Synthesis of 5 H-Pyrimido[5,4- b]indoles and 2-Benzylidene-3-indolinones. Org Lett 2024; 26:631-635. [PMID: 38214532 DOI: 10.1021/acs.orglett.3c03856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
A gold-catalyzed, nucleophile-controlled cascade reaction of N-(2-azidophenyl-ynyl)methanesulfonamides with nitriles and water is described that provides structurally diverse 5H-pyrimido[5,4-b]indoles and 2-benzylidene-3-indolinones in good to excellent yields. Mechanistic studies indicate that the β-sulfonamido-α-imino gold carbene is the key intermediate which is generated through the gold-catalyzed cyclization of N-(2-azidophenyl-ynyl)methanesulfonamides and undergoes formal [4 + 2] cascade annulation with nitriles and intramolecular SN2' type reaction with water, respectively.
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Affiliation(s)
- Yun-Long Zhu
- School of Chemistry and Chemical Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, China
| | - Yi-Fan Dong
- School of Chemistry and Chemical Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, China
| | - Si-Ru Wang
- School of Chemistry and Chemical Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, China
| | - You-Gui Li
- School of Chemistry and Chemical Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, China
| | - Xiang Wu
- School of Chemistry and Chemical Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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3
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Sun Q, Hüßler C, Kahle J, Mackenroth AV, Rudolph M, Krämer P, Oeser T, Hashmi ASK. Cascade Reactions of Aryl-Substituted Terminal Alkynes Involving in Situ-Generated α-Imino Gold Carbenes. Angew Chem Int Ed Engl 2023:e202313738. [PMID: 37882411 DOI: 10.1002/anie.202313738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 10/27/2023]
Abstract
An efficient, highly selective and divergent synthetic method to construct 2-substituted indoles and aryl-annulated carbazoles via the intermolecular generation of α-imino gold carbenes from terminal alkynes or diynes in combination with sulfilimines is disclosed. Importantly, the tandem reaction is proposed to proceed through an intermolecular gold carbene generation/C-H annulation followed by the activation of a second alkyne leading to 6-endo-dig cyclization, which is significantly different from previous dual activation or 1,6-carbene shift approaches for diyne systems. In the case of ortho-alkynylaniline as starting material, an unexpected regioselective formation of the indole moiety via the intermolecular path, instead of intramolecular hydroamination was discovered. This reactivity paved the way for a one-pot synthesis of the 11H-indolo [3,2-c] quinoline scaffold by exploiting the formed amino indole for a subsequent Pictet-Spengler reaction with aldehydes. The photophysical properties of the carbazoles indicated good violet-blue emission with quantum yields up to 40 %.
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Affiliation(s)
- Qiaoying Sun
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Christopher Hüßler
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Justin Kahle
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Alexandra V Mackenroth
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Matthias Rudolph
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Petra Krämer
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Thomas Oeser
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - A Stephen K Hashmi
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
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4
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Chen Y, Yan YH, Zhu BH, Chen F, Li L, Qian PC. Copper-Catalyzed Tandem Cyclization/Direct C(sp 2)-H Annulation of Azide-Ynamides via α-Imino Copper Carbenes: Access to Azepino[2,3- b:4,5- b']diindoles. Org Lett 2023; 25:2063-2067. [PMID: 36939559 DOI: 10.1021/acs.orglett.3c00434] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
A novel copper-catalyzed tandem cyclization/direct C(sp2)-H annulation of phenyl azide-ynamides via α-imino copper carbenes has been developed, which provides a concise and flexible approach for the construction of a range of valuable azepino[2,3-b:4,5-b']diindoles in mostly good to excellent yields with high chemoselectivities. This tandem reaction also exhibits a broad substrate scope, excellent functional group tolerance, simple operation, and mild reaction conditions.
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Affiliation(s)
- Yi Chen
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yao-Hong Yan
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Bo-Han Zhu
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Fan Chen
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Long Li
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Peng-Cheng Qian
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China.,Wenzhou Key Laboratory of Technology and Application of Environmental Functional Materials, Institute of New Materials & Industry Technology, Wenzhou University, Wenzhou 325000, China
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5
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Sancheti SP, Mondal DJ, Patil NT. Fluorination of α-Imino Gold Carbenes to Access C 3-Fluorinated Aza-Heterocycles. ACS Catal 2023. [DOI: 10.1021/acscatal.3c00088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Shashank P. Sancheti
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462 066, India
| | - Dibya Jyoti Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462 066, India
| | - Nitin T. Patil
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462 066, India
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6
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Halnor SV, Dhote PS, Ramana CV. Construction of the quinobenzoxazine core via gold-catalyzed dual annulation of azide-tethered alkynones with anthranils. Org Biomol Chem 2023; 21:2127-2137. [PMID: 36794667 DOI: 10.1039/d3ob00098b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
A new catalytic method for the construction of the quinobenzoxazine core has been developed employing the gold-catalyzed cyclization of o-azidoacetylenic ketones in the presence of anthranils. The overall process comprises of a gold-catalyzed 6-endo-dig cyclisation of o-azidoacetylenic ketone leading to a α-imino gold carbene and subsequent carbene transfer to anthranil leading to the 3-aryl-imino-quinoline-4-one intermediate, which undergoes 6π-electrocyclization and aromatization to form the central quinobenzoxazine core. This transformation provides a new approach to a diverse array of quinobenzoxazine structures, in addition to being scalable and having mild reaction conditions.
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Affiliation(s)
- Swapnil V Halnor
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411 008, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Pawan S Dhote
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411 008, India.
| | - Chepuri V Ramana
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411 008, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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7
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Xu Y, Fan H, Yang F, Xu S, Zhao X, Liao X, Zhang X. PPh 3-Mediated Cascade Reaction of 2-Alkynylnitrobenzenes and Thioureas for the Construction of Imidazo[4,5- b]indole-2-thiones. J Org Chem 2023. [PMID: 36800292 DOI: 10.1021/acs.joc.2c02434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
A simple method for the preparation of imidazo[4,5-b]indole-2-thiones from 2-alkynylnitrobenzenes and thioureas is described. In the reaction, a Wittig-like process was triggered by PPh3 and followed by a cyclization step. The products were afforded in yields of 70-98% under mild conditions. Additionally, the 2-alkynylnitrobenzenes were stable and could be prepared via a simple coupling step.
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Affiliation(s)
- Yao Xu
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China
| | - Hui Fan
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China
| | - Fan Yang
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China
| | - Shijie Xu
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China
| | - Xuechun Zhao
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China
| | - Xiaoming Liao
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China
| | - Xiaoxiang Zhang
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China
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8
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Xie JM, Zhu YL, Fu YM, Zhu CF, Cheng LJ, You YE, Wu X, Li YG. Gold-Catalyzed Cascade Reaction of 2-Alkynyl Aryl Azides with Enecarbamates for Direct Synthesis of α-(3-Indolyl)ketones. Org Lett 2023; 25:421-425. [PMID: 36622839 DOI: 10.1021/acs.orglett.2c04147] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
α-(3-Indolyl)ketones are essential building blocks for the generation of biologically active molecules. We described a new method for the direct assembly of α-(3-indolyl)ketones through the cascade reaction of 2-alkynyl aryl azides with enecarbamates, in which the in situ generated α-imino gold carbene intermediate was trapped by enecarbamate to achieve umpolung reactivity of indole at the 3-position.
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Affiliation(s)
- Jin-Ming Xie
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, China
| | - Yun-Long Zhu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, China
| | - Yan-Ming Fu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, China
| | - Cheng-Feng Zhu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, China
| | - Lan-Jun Cheng
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, China
| | - Yang-En You
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, China
| | - Xiang Wu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, China
| | - You-Gui Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, China
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9
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Xu Z, Zeng J, Cai M. An MCM-41-immobilized dichloro(pyridine-2-carboxylato)gold(III) complex: an efficient and recyclable catalyst for the annulation of anthranils and ynamides. Dalton Trans 2023; 52:806-817. [PMID: 36594393 DOI: 10.1039/d2dt03733e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A new mesoporous MCM-41-immobilized dichloro(pyridine-2-carboxylato)gold(III) complex [MCM-41-PicAuCl2] was synthesized via an addition reaction of a dichloro(3-hydroxypyridine-2-carboxylato)gold(III) complex to triethoxy(3-isocyanatopropyl)silane, followed by immobilization on MCM-41 and was characterized by different physico-chemical techniques. In the presence of 5 mol% of MCM-41-PicAuCl2, the annulation reaction between anthranils and ynamides proceeded smoothly under mild conditions to afford diverse 6- or 5-formylindoles with high atom economy and good to excellent yields. This new heterogenized gold(III) complex can be easily recovered through a simple filtration process and recycled more than seven times without any apparent loss of its catalytic efficiency.
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Affiliation(s)
- Zhaohui Xu
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China.
| | - Jiajun Zeng
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China.
| | - Mingzhong Cai
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China.
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10
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Greiner LC, Arichi N, Inuki S, Ohno H. Gold(I)-Catalyzed Benzylic C(sp 3 )-H Functionalizations: Divergent Synthesis of Indole[a]- and [b]-Fused Polycycles. Angew Chem Int Ed Engl 2023; 62:e202213653. [PMID: 36255174 DOI: 10.1002/anie.202213653] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/17/2022] [Accepted: 10/17/2022] [Indexed: 11/05/2022]
Abstract
Phenyl azides substituted by an (alkylphenyl)ethynyl group facilitate benzylic sp3 (C-H) functionalization in the presence of a JohnPhosAu catalyst, resulting in indole-fused tetra- and pentacycles via divergent N- or C-cyclization. The chemoselectivity is influenced depending on the counter-anion, the electron density of the α-imino gold(I) carbene, and the alkyl groups stabilizing the benzylic carbocation originating from a 1,5-hydride shift. An isotopic labeling experiment demonstrates the involvement of an indolylgold(I) species resulting from a tautomerization that is much faster than the deauration. The formation of a benzylic sp3 (C-H) functionalization leading to an indole-fused seven-membered ring is also demonstrated.
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Affiliation(s)
- Luca C Greiner
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Norihito Arichi
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Shinsuke Inuki
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
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11
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León Rayo DF, Mansour A, Wu W, Bhawal BN, Gagosz F. Steric, Electronic and Conformational Synergistic Effects in the Gold(I)-catalyzed α-C-H Bond Functionalization of Tertiary Amines. Angew Chem Int Ed Engl 2023; 62:e202212893. [PMID: 36170553 DOI: 10.1002/anie.202212893] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Indexed: 01/12/2023]
Abstract
Direct C-H bond functionalization is a useful strategy for the straightforward formation of C-C and C-Heteroatom bonds. In the present work, a unique approach for the challenging electrophilic Au-catalyzed α-C-H bond functionalization of tertiary amines is presented. Electronic, steric and conformational synergistic effects exerted by the use of a malonate unit in the substrate were key to the success of this transformation. This new reactivity was applied to the synthesis of tetrahydro-γ-carboline products which, under oxidative conditions, could be converted into valuable structural motifs found in bioactive alkaloid natural products.
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Affiliation(s)
- David F León Rayo
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5, Ottawa, Canada
| | - Ali Mansour
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5, Ottawa, Canada
| | - Wenbin Wu
- Département de Chimie, UMR 7652 CNRS, Ecole Polytechnique, 91128, Palaiseau, France
| | - Benjamin N Bhawal
- Département de Chimie, UMR 7652 CNRS, Ecole Polytechnique, 91128, Palaiseau, France.,Present Address: EaStChem, School of Chemistry, University of Edinburgh Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK
| | - Fabien Gagosz
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5, Ottawa, Canada.,Département de Chimie, UMR 7652 CNRS, Ecole Polytechnique, 91128, Palaiseau, France
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12
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Mansour A, Gagosz F. Expedited Total Synthesis of (±)-Brevianamide A via the Strategic Use of Gold(I) Catalysis. Org Lett 2022; 24:7200-7204. [PMID: 36170661 DOI: 10.1021/acs.orglett.2c02971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two concise and complementary routes to the polycyclic alkaloid (±)-brevianamide A from readily available amino acid building blocks are presented. Key to the synthesis is the strategic use of a gold(I)-catalyzed cascade process that quickly assembles the characteristic pseudoindoxyl motif of the natural product along with the two adjacent quaternary centers in a single step. This sequence, which exemplifies the structural complexity that can be achieved with gold catalysis, allowed for the shortest and highest-yield synthesis of (±)-brevianamide A to date (four steps LLS, 14% overall yield).
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Affiliation(s)
- Ali Mansour
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Ontario, Canada
| | - Fabien Gagosz
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Ontario, Canada
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13
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Rani M, Utreja D, Sharma S. Role of Indole Derivatives in Agrochemistry: Synthesis and Future Insights. CURR ORG CHEM 2022. [DOI: 10.2174/1385272826666220426103835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
Heterocycles constitute a wider class of organic compounds which contribute significantly in every facet of pure and applied chemistry. Indole, one of the bicyclic heterocyclic compounds containing nitrogen atom, witnessed unparalleled biological activity such as antiviral, antibacterial, anticancer, anti-depressant and antifungal activities. Different biological activities exhibited by indole derivatives provide the impulsion to explore its activity against anti-phytopathogenic microbes to save the plants from pests and disease, as food security will once again become a rigid demand. This review mainly focuses on various methods related to the synthesis of indole derivatives and its role in agriculture.
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Affiliation(s)
- Manisha Rani
- Department of Chemistry, Punjab Agricultural University, Ludhiana 141004, India
| | - Divya Utreja
- Department of Chemistry, Punjab Agricultural University, Ludhiana 141004, India
| | - Shivali Sharma
- Department of Chemistry, Punjab Agricultural University, Ludhiana 141004, India
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14
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Li H, Zhu Y, Jiang C, Wei J, Liu P, Sun P. HOAc catalyzed three-component reaction for the synthesis of 3,3'-(arylmethylene)bis(1 H-indoles). Org Biomol Chem 2022; 20:3365-3374. [PMID: 35355039 DOI: 10.1039/d2ob00395c] [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 efficient HOAc catalyzed three-component reaction of 2-(arylethynyl)anilines with arylaldehydes has been achieved, which leads to the generation of 3,3'-(arylmethylene)bis(1H-indoles) with good to excellent yields and high regioselectivity under transition-metal-free conditions. Four new C-C and C-N bonds were effectively formed in a one-pot procedure. Subsequent research on the reaction mechanism indicated that the reaction likely involved the processes of intramolecular cyclization and cascade intermolecular dehydration condensation.
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Affiliation(s)
- Heng Li
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing 210023, China.
| | - Yan Zhu
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing 210023, China.
| | - Cong Jiang
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing 210023, China.
| | - Jia Wei
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing 210023, China.
| | - Ping Liu
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing 210023, China.
| | - Peipei Sun
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing 210023, China.
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15
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Dhote P, Ramana C. Competing Intra‐ vs Intermolecular Nitrene Transfer in the [Au]‐Catalysed Reaction of 2‐Alkynylphenylazides. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Wu W, Liang J, Jiang B, Tian X, Li T. Insights into gold-catalyzed formation of aza-heterocycles using benzofuroxans as nitrene transfer reagents: mechanism and origins of chemoselectivity. RSC Adv 2022; 12:27483-27491. [PMID: 36276040 PMCID: PMC9516356 DOI: 10.1039/d2ra05382a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 09/20/2022] [Indexed: 11/21/2022] Open
Abstract
Density functional theory (DFT) calculations have been performed to reveal the mechanism of gold(i)-catalyzed annulation of N-allylynamides and benzofuroxans as nitrene transfer reagents to construct azaheterocyclic compounds. The calculated results revealed that the reaction mechanism mainly undergoes eight processes. Among the reaction steps, intramolecular nucleophilic attack of the imino N atom on the α-position of activated gold keteniminium is a rate-determining process, which is different from that proposed previously by experiment. The chemoselectivity of the products is controlled by competition between the cyclopropanation of α-imino gold carbenes and intramolecular nucleophilic attack of the phenyl ring on α-imino gold carbenes, and could be explained by NPA charge. The different yields of cyclopropanated product in different solvents are dictated by the relative polarity leading to the different energy barriers of the rate-determining steps. The present work expounds the experimental observation at the molecular level and is informative for exploring efficient syntheses of 3-azabicyclo[3.1.0]hexanes. DFT calculations were employed to study the mechanism and origin of chemoselectivity of gold-catalyzed annulation of N-allylynamides and benzofuroxans as nitrene transfer reagents.![]()
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Affiliation(s)
- Weirong Wu
- School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing, China
| | - Jiehui Liang
- School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing, China
| | - Biaolin Jiang
- School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing, China
| | - Xiaoxuan Tian
- School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing, China
| | - Tingzhen Li
- School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing, China
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17
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Weng CY, Zhu GY, Zhu BH, Qian PC, Zhu XQ, Zhou JM, Ye LW. Copper-catalyzed B−H bond insertion reaction of azide-ynamide with borane adducts via α-imino copper carbenes. Org Chem Front 2022. [DOI: 10.1039/d2qo00457g] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new copper-catalyzed B−H bond insertion reaction between azide-ynamides and borane adducts has been developed, which represents the first B−H bond insertion into α-imino metal carbenes. This protocol enables the...
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18
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Greiner LC, Inuki S, Arichi N, Oishi S, Suzuki R, Iwai T, Sawamura M, Hashmi ASK, Ohno H. Access to Indole-Fused Benzannulated Medium-Sized Rings through a Gold(I)-Catalyzed Cascade Cyclization of Azido-Alkynes. Chemistry 2021; 27:12992-12997. [PMID: 34110644 DOI: 10.1002/chem.202101824] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Indexed: 02/05/2023]
Abstract
Because benzannulated and indole-fused medium-sized rings are found in many bioactive compounds, combining these fragments might lead to unexplored areas of biologically relevant and uncovered chemical space. Herein is shown that α-imino gold carbene chemistry can play an important role in solving the difficulty in the formation of medium-sized rings. Namely, phenylene-tethered azido-alkynes undergo arylative cyclization through the formation of a gold carbene intermediate to afford benzannulated indole-fused medium-sized tetracycles. The reactions allow a range of different aryl substitution patterns and efficient access to these otherwise difficult-to-obtain medium-sized rings. This study also demonstrates the feasibility of the semihollow-shaped C-dtbm ligand for the construction of a nine-membered ring.
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Affiliation(s)
- Luca C Greiner
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Shinsuke Inuki
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Norihito Arichi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Shinya Oishi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan.,Current Address: Department of Medicinal Chemistry, Kyoto Pharmaceutical University, Yashima-ku, Kyoto, 607-8412, Japan
| | - Rikito Suzuki
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Tomohiro Iwai
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.,Current Address: Graduate School of Arts and Sciences, The University of Tokyo, Meguro-ku, Tokyo, 153-8902, Japan
| | - Masaya Sawamura
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - A Stephen K Hashmi
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
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19
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Greiner LC, Matsuoka J, Inuki S, Ohno H. Azido-Alkynes in Gold(I)-Catalyzed Indole Syntheses. CHEM REC 2021; 21:3897-3910. [PMID: 34498385 DOI: 10.1002/tcr.202100202] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/26/2021] [Indexed: 12/20/2022]
Abstract
The exploitation of nitrogen-functionalized reactive intermediates plays an important role in the synthesis of biologically relevant scaffolds in the field of pharmaceutical sciences. Those based on gold carbenes carry a strong potential for the design of highly efficient cascade processes toward the synthesis of compounds containing a fused indole core structure. This personal account gives a detailed explanation of our contribution to this sector, and embraces the reaction development of efficient gold-catalyzed cascade processes based on diversely functionalized azido-alkynes. Challenging cyclizations and their subsequent application in the synthesis of pharmaceutically relevant scaffolds and natural products conducted in an intra- or intermolecular fashion are key features of our research.
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Affiliation(s)
- Luca C Greiner
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Junpei Matsuoka
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan.,Current address: Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kodo, Kyotanabe, 610-0395, Japan
| | - Shinsuke Inuki
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
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20
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Ru GX, Zhang TT, Zhang M, Jiang XL, Wan ZK, Zhu XH, Shen WB, Gao GQ. Recent progress towards the transition-metal-catalyzed Nazarov cyclization of alkynes via metal carbenes. Org Biomol Chem 2021; 19:5274-5283. [PMID: 34060570 DOI: 10.1039/d1ob00744k] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
In recent years, transition-metal-catalyzed tandem cyclization reactions of alkynes, especially those involving a metal carbene intermediate, have received worthwhile interest, as this type of reaction does not require the use of risky and potentially explosive diazo compounds as starting materials for carbene generation. A significant and general strategy for the stereospecific synthesis of 5-membered cycles is Nazarov cyclization based on the 4π-conrotatory electrocyclization of a conjugated pentadienyl cation to afford a cyclopentenyl cation. In this review, we introduce an overview of recent advances in the transition-metal-catalyzed Nazarov cyclization of alkynes via a metal carbene intermediate, and categorize these reactions according to the structure of the metal carbene. Our aim is to accelerate advancements in this enchanting area of research.
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Affiliation(s)
- Guang-Xin Ru
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Ting-Ting Zhang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Meng Zhang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Xiao-Lei Jiang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Zheng-Kai Wan
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Xiu-Hong Zhu
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Wen-Bo Shen
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Guang-Qin Gao
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
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21
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Praveen C. Cycloisomerization of π-Coupled Heteroatom Nucleophiles by Gold Catalysis: En Route to Regiochemically Defined Heterocycles. CHEM REC 2021; 21:1697-1737. [PMID: 34061426 DOI: 10.1002/tcr.202100105] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/08/2021] [Accepted: 05/11/2021] [Indexed: 11/06/2022]
Abstract
Since the dawn of millennium, catalytic gold chemistry is at the forefront to set off diverse organic reactions via unique activation of π-bonded molecules. Within this purview, cycloisomerization of heteroatom nucleophiles linked to a π-system is one of the well recognized chemistry for the construction of numerous heterocyclic cores. Though the rudimentary aspects of this transformation are reviewed by several groups in different timeline, a holistic view on regiochemistry of such reactions went largely overlooked. Hence, this account emphasizes the gold catalyzed regioselective cycloisomerization of structurally distinctive π-connected hetero-nucleophiles leading to different heterocycles documented in the last two decades. From an application perspective, this account also highlights those methodologies which find a role in the total synthesis of natural products. Wherever appropriate, mechanistic details and contributing factors for selectivity are also discussed.
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Affiliation(s)
- Chandrasekar Praveen
- Electrochemical Power Sources Division, Central Electrochemical Research Institute (CSIR Laboratory), Alagappapuram, Karaikudi, 630003, Sivagangai District, Tamil Nadu, India
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22
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Hendrich CM, Hannibal VD, Eberle L, Hertwig LE, Zschieschang U, Rominger F, Rudolph M, Klauk H, K. Hashmi AS. Gold‐Catalyzed Synthesis of π‐Extended Carbazole‐Based Systems and their Application as Organic Semiconductors. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001461] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Christoph M. Hendrich
- Organisch-Chemisches Institut Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Valentin D. Hannibal
- Organisch-Chemisches Institut Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Lukas Eberle
- Organisch-Chemisches Institut Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Leif E. Hertwig
- Organisch-Chemisches Institut Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Ute Zschieschang
- Max Planck Institute for Solid State Research Heisenbergstr. 1 70569 Stuttgart Germany
| | - Frank Rominger
- Organisch-Chemisches Institut Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Matthias Rudolph
- Organisch-Chemisches Institut Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Hagen Klauk
- Max Planck Institute for Solid State Research Heisenbergstr. 1 70569 Stuttgart Germany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches Institut Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
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23
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Affiliation(s)
- Sina Witzel
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Jin Xie
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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24
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Pandit YB, Jiang YT, Jian JJ, Chen TC, Kuo TC, Cheng MJ, Liu RS. Gold-catalyzed [5 + 2]-annulations of 1,3-diyn-1-amides with anthranils bearing no C(6)-substituents. Org Chem Front 2021. [DOI: 10.1039/d1qo00026h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This work reports the gold-catalyzed [5 + 2]-annulations of commonly used anthranils with 1,3-diynamides, yielding quiniline oxides as the main products.
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Affiliation(s)
| | - Yan-Ting Jiang
- Department of Chemistry
- National Tsing-Hua University
- Hsinchu
- Republic of China
| | - Jia-Jyun Jian
- Department of Chemistry
- National Tsing-Hua University
- Hsinchu
- Republic of China
| | - Tai-Chi Chen
- Department of Biomedical Engineering and Enviornmental Science
- National Tsing-Hua University
- Hsinchu
- Republic of China
| | - Tung-Chun Kuo
- Department of Chemistry
- National Cheng Kung University
- Tainan
- Taiwan
| | - Mu-Jeng Cheng
- Department of Chemistry
- National Cheng Kung University
- Tainan
- Taiwan
| | - Rai-Shung Liu
- Department of Chemistry
- National Tsing-Hua University
- Hsinchu
- Republic of China
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25
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Sajjad F, Reddy AGK, Xing D, Dong S, Hu W. Ruthenium(II)-catalyzed facile synthesis of 3-(phenylamino)-1H-indole-2-carboxylates from anilines and diazo pyruvates promoted by FeCl3. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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26
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Li P, Zhou Z, Yang F, Xu Y, Zhang X. Palladium-Catalyzed Synthesis of 1 H-Indol-3-yl Acrylates from 2-Alkynyl Arylazides and Acrylic Acids. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202101047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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27
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Hu G, Li P, Zhou Z, Yang F, Xu S, Fan H, Zhao X, Zhang X. NBS-assisted palladium-catalyzed bromination/cross-coupling reaction of 2-alkynyl arylazides with KSCN: an efficient method to synthesize 3-thiocyanindoles. NEW J CHEM 2021. [DOI: 10.1039/d0nj05894g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An efficient NBS-assisted palladium-catalyzed bromination/cross-coupling synthesis of 3-thiocyanindoles from 2-alkynyl arylazides with KSCN has been described.
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Affiliation(s)
- Guiwen Hu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Ping Li
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Zhiqiang Zhou
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Fan Yang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Shijie Xu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Hui Fan
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Xuechun Zhao
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Xiaoxiang Zhang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
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28
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Wang D, Wang S, Hao W, Tu S, Jiang B. Dual Palladium/Scandium Catalysis toward Rotationally Hindered
C3‐Naphthylated
Indoles from
β‐Alkynyl
Ketones and
o
‐Alkynyl
Anilines. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000304] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Dan Wang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University Xuzhou Jiangsu 221116 China
| | - Shi‐Chao Wang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University Xuzhou Jiangsu 221116 China
| | - Wen‐Juan Hao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University Xuzhou Jiangsu 221116 China
| | - Shu‐Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University Xuzhou Jiangsu 221116 China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University Xuzhou Jiangsu 221116 China
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29
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Shinde MH, Ramana CV. An Apparent Umpolung Reactivity of Indole through [Au]-Catalysed Cyclisation and Lewis-Acid-Mediated Allylation. Chemistry 2020; 26:17171-17175. [PMID: 32970893 DOI: 10.1002/chem.202003441] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 09/07/2020] [Indexed: 11/10/2022]
Abstract
The sequential functionalization of indole C2 and C3 in an umpolung fashion was executed with a predesigned substrate and choice of reagents. The developed method comprises gold-catalysed alkynol cycloisomerisation/intramolecular addition of C2 of indole and subsequent BF3 ⋅OEt2 -mediated regioselective C3 allylation, resulting in the synthesis of the functionalized indoloisoquinolinone scaffold. The reaction involves 5-endo-alkynol cycloisomerisation and the dearomative addition of indole C2 to the intermediate oxocarbenium cation, which results in two equilibrating fused and spiropentacyclic intermediates, which upon treatment with allyl silane in the presence of BF3 ⋅OEt2 , undergo selective indole C3 allylation. Other nucleophiles, such as hydride, azide and indole, were also found to be compatible with this process.
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Affiliation(s)
- Mahesh H Shinde
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110002, India
| | - Chepuri V Ramana
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110002, India
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30
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Gharpure SJ, Naveen S, Chavan RS, Padmaja. Regioselective Synthesis of Halotriazoles and their Utility in Metal Catalyzed Coupling Reactions. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000973] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Santosh J. Gharpure
- Department of Chemistry Indian Institute of Technology Bombay 400076 Powai Mumbai India
| | - Sudi Naveen
- Department of Chemistry Indian Institute of Technology Bombay 400076 Powai Mumbai India
| | - Rupali S. Chavan
- Department of Chemistry Indian Institute of Technology Bombay 400076 Powai Mumbai India
| | - Padmaja
- Department of Chemistry Indian Institute of Technology Bombay 400076 Powai Mumbai India
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31
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Tambe SD, Iqbal N, Cho EJ. Nickel-Catalyzed trans-Carboamination across Internal Alkynes to Access Multifunctionalized Indoles. Org Lett 2020; 22:8550-8554. [PMID: 33104355 DOI: 10.1021/acs.orglett.0c03148] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A Ni-catalyzed reaction was developed for the synthesis of multifunctionalized indoles. The reaction proceeded through oxidative cyclization of the Ni(0)/P^N complex with an enyne system, 2-alkynyl anilinoacrylate, to provide a nickelacycle intermediate. The trans-carboamination around the internal alkyne was achieved by syn/anti-rotation of the Ni-carbenoid intermediate formed by C-N bond cleavage of the nickelacycle, and 3-alkenylated indoles were formed by C-N bond-forming reductive elimination. Notably, the synthesized indoles could be successfully transformed to functionalized carbazoles.
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Affiliation(s)
- Shrikant D Tambe
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Naeem Iqbal
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
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32
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Abstract
Three- and four-membered rings, widespread motifs in nature and medicinal chemistry, have fascinated chemists ever since their discovery. However, due to energetic considerations, small rings are often difficult to assemble. In this regard, homogeneous gold catalysis has emerged as a powerful tool to construct these highly strained carbocycles. This review aims to provide a comprehensive summary of all the major advances and discoveries made in the gold-catalyzed synthesis of cyclopropanes, cyclopropenes, cyclobutanes, cyclobutenes, and their corresponding heterocyclic or heterosubstituted analogs.
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Affiliation(s)
- Mauro Mato
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Quı́mica Analı́tica i Quı́mica Orgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
| | - Allegra Franchino
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Quı́mica Analı́tica i Quı́mica Orgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
| | - Cristina Garcı A-Morales
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Quı́mica Analı́tica i Quı́mica Orgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
| | - Antonio M Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Quı́mica Analı́tica i Quı́mica Orgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
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33
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- M, Jain M, Vashishtha P, Gupta G, Sharma A, Von SO, Vij A, Thakur A. Switchable cool and cold white emission from dysprosium doped SrZnO 2. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 33:035703. [PMID: 32992301 DOI: 10.1088/1361-648x/abbc9c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In presented work, excitation selective novel cool and cold white emission is reported from dysprosium (Dy) doped SrZnO2nanophosphors, synthesized by combustion technique. The host lattice provided selective excitation routes for Dy3+levels and intrinsic defects levels via charge transfer (270 nm) and host defects absorption bands (375 nm), respectively. The emission due to Dy3+levels was found to be exhibiting cool white emission and that from intrinsic defects was cold white emission, as characterized from correlated color temperature. UV irradiated glow curve analysis complemented the results by exhibiting signal due to Dy assisted traps on near UV exposure (254 nm) and that of host related traps at far UV exposure (365 nm). The luminescence phenomenon is comprehended through proposed band model. The obtained results proclaimed SrZnO2:Dy as a potential member among white emitting phosphors to be used as standard daylight sources in commercial and aesthetic lighting.
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Affiliation(s)
- Manju -
- Punjabi University, Patiala, Punjab, INDIA
| | - Megha Jain
- Punjabi University, Patiala, Punjab, INDIA
| | | | | | - Aditya Sharma
- Advanced Analysis Centre, Manav Rachna International University, Faridabad, Haryana, INDIA
| | - Sung Ok Von
- Korea Institute of Science and Technology, Seongbuk-gu, Seoul, Korea (the Republic of)
| | - Ankush Vij
- Nano Analysis Centre Beam-line Division Pohang Accelerator Lab, Amity University Haryana, Gurgaon, Haryana, INDIA
| | - Anup Thakur
- Basic & Applied Sciences, Punjabi University, Patiala, 147002, INDIA
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34
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Liu X, Wang Z, Zhai T, Luo C, Zhang Y, Chen Y, Deng C, Liu R, Ye L. Copper‐Catalyzed Azide–Ynamide Cyclization to Generate α‐Imino Copper Carbenes: Divergent and Enantioselective Access to Polycyclic N‐Heterocycles. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007206] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xin Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Ze‐Shu Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Tong‐Yi Zhai
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Chen Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Yi‐Ping Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Yang‐Bo Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 China
| | - Rai‐Shung Liu
- Department of Chemistry National Tsing-Hua University Hsinchu Taiwan 30013 Republic of China
| | - Long‐Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China
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35
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Liu X, Wang ZS, Zhai TY, Luo C, Zhang YP, Chen YB, Deng C, Liu RS, Ye LW. Copper-Catalyzed Azide-Ynamide Cyclization to Generate α-Imino Copper Carbenes: Divergent and Enantioselective Access to Polycyclic N-Heterocycles. Angew Chem Int Ed Engl 2020; 59:17984-17990. [PMID: 32621338 DOI: 10.1002/anie.202007206] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/11/2020] [Indexed: 01/23/2023]
Abstract
Here an efficient copper-catalyzed cascade cyclization of azide-ynamides via α-imino copper carbene intermediates is reported, representing the first generation of α-imino copper carbenes from alkynes. This protocol enables the practical and divergent synthesis of an array of polycyclic N-heterocycles in generally good to excellent yields with broad substrate scope and excellent diastereoselectivities. Moreover, an asymmetric azide-ynamide cyclization has been achieved with high enantioselectivities (up to 98:2 e.r.) by employing BOX-Cu complexes as chiral catalysts. Thus, this protocol constitutes the first example of an asymmetric azide-alkyne cyclization. The proposed mechanistic rationale for this cascade cyclization is further supported by theoretical calculations.
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Affiliation(s)
- Xin Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Ze-Shu Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Tong-Yi Zhai
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chen Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Yi-Ping Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Yang-Bo Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Rai-Shung Liu
- Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, 30013, Republic of China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
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36
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Song L, Tian G, Van Meervelt L, Van der Eycken EV. Synthesis of Pyrrolo[1,2-b]isoquinolines via Gold(I)-Catalyzed Cyclization/Enyne Cycloisomerization/1,2-Migration Cascade. Org Lett 2020; 22:6537-6542. [DOI: 10.1021/acs.orglett.0c02310] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Guilong Tian
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
- Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow, 117198, Russia
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37
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Ye LW, Zhu XQ, Sahani RL, Xu Y, Qian PC, Liu RS. Nitrene Transfer and Carbene Transfer in Gold Catalysis. Chem Rev 2020; 121:9039-9112. [PMID: 32786423 DOI: 10.1021/acs.chemrev.0c00348] [Citation(s) in RCA: 173] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Catalytic transformations involving metal carbenes are considered one of the most important aspects of homogeneous transition metal catalysis. Recently, gold-catalyzed generation of gold carbenes from readily available alkynes represents a significant advance in metal carbene chemistry. This Review summarizes the advances in the gold-catalyzed nitrene-transfer reactions of alkynes with nitrogen-transfer reagents, such as azides, nitrogen ylides, isoxazoles, and anthranils, and gold-catalyzed carbene-transfer reactions, involving oxygen atom-transfer reactions of alkynes with nitro compounds, nitrones, sulfoxides, and pyridine N-oxides, through the presumable α-imino gold carbene and α-oxo gold carbene intermediates, respectively. Gold-catalyzed processes are reviewed by highlighting their product diversity, selectivity, and applicability, and the mechanistic rationale is presented where possible.
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Affiliation(s)
- Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Xin-Qi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Rajkumar Lalji Sahani
- Department of Chemistry, National Tsing-Hua University, Hsinchu 30013, Taiwan, Republic of China
| | - Yin Xu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Peng-Cheng Qian
- Institute of New Materials & Industry Technology, College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China
| | - Rai-Shung Liu
- Department of Chemistry, National Tsing-Hua University, Hsinchu 30013, Taiwan, Republic of China
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38
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Bhunia S, Ghosh P, Patra SR. Gold‐Catalyzed Oxidative Alkyne Functionalization by N−O/S−O/C−O Bond Oxidants. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000274] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sabyasachi Bhunia
- Department of Chemistry Central University of Jharkhand Ranchi Jharkhand 835205 India
| | - Partha Ghosh
- Department of Chemistry Central University of Jharkhand Ranchi Jharkhand 835205 India
| | - Snigdha Rani Patra
- Department of Chemistry Central University of Jharkhand Ranchi Jharkhand 835205 India
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39
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Matsuoka J, Inuki S, Matsuda Y, Miyamoto Y, Otani M, Oka M, Oishi S, Ohno H. Total Synthesis of Dictyodendrins A–F by the Gold‐Catalyzed Cascade Cyclization of Conjugated Diyne with Pyrrole. Chemistry 2020; 26:11150-11157. [DOI: 10.1002/chem.202001950] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 04/30/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Junpei Matsuoka
- Graduate School of Pharmaceutical SciencesKyoto University Sakyo-ku Kyoto 606-8501 Japan
| | - Shinsuke Inuki
- Graduate School of Pharmaceutical SciencesKyoto University Sakyo-ku Kyoto 606-8501 Japan
| | - Yuka Matsuda
- Graduate School of Pharmaceutical SciencesKyoto University Sakyo-ku Kyoto 606-8501 Japan
| | - Yoichi Miyamoto
- National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) 7-6-8 Saito-Asagi Ibaraki, Osaka 567-0085 Japan
| | - Mayumi Otani
- National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) 7-6-8 Saito-Asagi Ibaraki, Osaka 567-0085 Japan
| | - Masahiro Oka
- National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) 7-6-8 Saito-Asagi Ibaraki, Osaka 567-0085 Japan
| | - Shinya Oishi
- Graduate School of Pharmaceutical SciencesKyoto University Sakyo-ku Kyoto 606-8501 Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical SciencesKyoto University Sakyo-ku Kyoto 606-8501 Japan
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40
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Yan L, Han L, Xie R. Ferrocenyl induced one-pot synthesis of 3,3′-ferrocenylbiindoles. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1770235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Ligang Yan
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot, P. R. China
| | - Limin Han
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot, P. R. China
| | - Ruijun Xie
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot, P. R. China
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41
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Huang J, Su H, Bao M, Qiu L, Zhang Y, Xu X. Gold(iii)-catalyzed azide-yne cyclization/O-H insertion cascade reaction for the expeditious construction of 3-alkoxy-4-quinolinone frameworks. Org Biomol Chem 2020; 18:3888-3892. [PMID: 32373897 DOI: 10.1039/d0ob00745e] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A gold-catalyzed 6-endo-dig azide-yne cyclization/O-H insertion cascade reaction of azide-tethered alkynes with alcohols has been developed, and it provides an expeditious access to 3-alkoxy-4-quinoline derivatives in good to high yields under mild and neutral reaction conditions with broad substrate generality. The utility of this method is emphasized by a scalable experiment and concise total synthesis of a bioactive natural product Leiokinine A, and other bioactive quinoline analogs.
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Affiliation(s)
- Jingjing Huang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Han Su
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Ming Bao
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Lihua Qiu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yuanqing Zhang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Xinfang Xu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China. and College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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42
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Li T, Chen BL, Zhu LL, Chen Z. Gold catalyzed cascade reaction of 2-Alkynyl arylazides with 1,2,3-Triazoles to provide N- and N-Indol-3-yl 1,2,3-Triazole derivatives. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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43
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Caiuby CAD, de Jesus MP, Burtoloso ACB. α-Imino Iridium Carbenes from Imidoyl Sulfoxonium Ylides: Application in the One-Step Synthesis of Indoles. J Org Chem 2020; 85:7433-7445. [DOI: 10.1021/acs.joc.0c00833] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Clarice A. D. Caiuby
- Instituto de Quı́mica de São Carlos, Universidade de São Paulo, CEP, 13560-970 São Carlos, SP, Brazil
| | - Matheus P. de Jesus
- Instituto de Quı́mica de São Carlos, Universidade de São Paulo, CEP, 13560-970 São Carlos, SP, Brazil
| | - Antonio C. B. Burtoloso
- Instituto de Quı́mica de São Carlos, Universidade de São Paulo, CEP, 13560-970 São Carlos, SP, Brazil
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44
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Tian X, Song L, Hashmi ASK. α-Imino Gold Carbene Intermediates from Readily Accessible Sulfilimines: Intermolecular Access to Structural Diversity. Chemistry 2020; 26:3197-3204. [PMID: 31793680 PMCID: PMC7154771 DOI: 10.1002/chem.201904869] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/01/2019] [Indexed: 11/16/2022]
Abstract
Catalytic approaches to pharmaceutically important bioactive skeletons through gold carbene intermediates have experienced a dramatic development in the last decade. Although various carbene precursors continue to play an important role in heterocyclic syntheses, these reagents are associated with some drawbacks in terms of functional group tolerance, synthetic methods and safety limitations. A new generation of nitrene transfer reagents was established in 2019: the sulfilimines. These are safe, inexpensive and readily available. They can conveniently be stored and handled, and thus represent ideal reagents for the fast and modular modification of scaffolds and the preparation of libraries by intermolecular reactions of two components. Both the practical methods for synthesizing sulfilimines and the versatility of these ylidic species in gold-catalyzed preparation of structural diversity, for both heterocycles and carbocycles, will be outlined in this Concept article.
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Affiliation(s)
- Xianhai Tian
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Lina Song
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - A. Stephen K. Hashmi
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
- Chemistry DepartmentFaculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia
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45
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Luo M, Zhu X, Liu R, Yu S, Wei W. FeCl3-Promoted Annulation of 2-Haloindoles: Switchable Synthesis of Spirooxindole-chromeno[2,3-b]indoles and Spirooxindole-chromeno[3,2-b]indoles. J Org Chem 2020; 85:3638-3654. [DOI: 10.1021/acs.joc.9b03300] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Mupeng Luo
- School of Life Science and Technology (SLST), ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, 99 Haike Road, Shanghai 201210, China
| | - Xinlei Zhu
- Ammoxidation Business Unit Shanghai R&D Center, Anshan Hifichem Company, Ltd., Shanghai 201100, China
| | - Rufeng Liu
- Ammoxidation Business Unit Shanghai R&D Center, Anshan Hifichem Company, Ltd., Shanghai 201100, China
| | - Shunming Yu
- Ammoxidation Business Unit Shanghai R&D Center, Anshan Hifichem Company, Ltd., Shanghai 201100, China
| | - Wanguo Wei
- School of Life Science and Technology (SLST), ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, 99 Haike Road, Shanghai 201210, China
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46
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Tian X, Song L, Farshadfar K, Rudolph M, Rominger F, Oeser T, Ariafard A, Hashmi ASK. Acyl Migration versus Epoxidation in Gold Catalysis: Facile, Switchable, and Atom-Economic Synthesis of Acylindoles and Quinoline Derivatives. Angew Chem Int Ed Engl 2020; 59:471-478. [PMID: 31622542 PMCID: PMC6972584 DOI: 10.1002/anie.201912334] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Indexed: 12/13/2022]
Abstract
We report a switchable synthesis of acylindoles and quinoline derivatives via gold-catalyzed annulations of anthranils and ynamides. α-Imino gold carbenes, generated in situ from anthranils and an N,O-coordinated gold(III) catalyst, undergo electrophilic attack to the aryl π-bond, followed by unexpected and highly selective 1,4- or 1,3-acyl migrations to form 6-acylindoles or 5-acylindoles. With the (2-biphenyl)di-tert-butylphosphine (JohnPhos) ligand, gold(I) carbenes experienced carbene/carbonyl additions to deliver quinoline oxides. Some of these epoxides are valuable substrates for the preparation of 3-hydroxylquinolines, quinolin-3(4H)-ones, and polycyclic compounds via facile in situ rearrangements. The reaction can be efficiently conducted on a gram scale and the obtained products are valuable substrates for preparing other potentially useful compounds. A computational study explained the unexpected selectivities and the dependency of the reaction pathway on the oxidation state and ligands of gold. With gold(III) the barrier for the formation of the strained oxirane ring is too high; whereas with gold(I) this transition state becomes accessible. Furthermore, energetic barriers to migration of the substituents on the intermediate sigma-complexes support the observed substitution pattern in the final product.
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Affiliation(s)
- Xianhai Tian
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Lina Song
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Kaveh Farshadfar
- Department of ChemistryIslamic Azad University, Central Tehran Branch, PoonakTehranIran
| | - Matthias Rudolph
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Frank Rominger
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Thomas Oeser
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Alireza Ariafard
- Department of ChemistryIslamic Azad University, Central Tehran Branch, PoonakTehranIran
- School of Physical SciencesUniversity of TasmaniaPrivate Bag 75HobartTasmania7001Australia
| | - A. Stephen K. Hashmi
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
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47
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Hong K, Zhou S, Hu W, Xu X. Rh-Catalyzed nitrene alkyne metathesis/formal C–N bond insertion cascade: synthesis of 3-iminoindolines. Org Chem Front 2020. [DOI: 10.1039/d0qo00294a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A Rh-catalyzed nitrene/alkyne metathesis (NAM) cascade reaction terminated by a formal C–N bond insertion has been developed, which provides facile access to the tricyclic 3-iminoindolines in good yields with broad substrate scope.
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Affiliation(s)
- Kemiao Hong
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- China
| | - Su Zhou
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- China
| | - Wenhao Hu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- China
| | - Xinfang Xu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- China
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48
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Zhou Z, Xu Y, Zhu B, Li P, Hu G, Yang F, Xu S, Zhang X. One-pot synthesis of 3-hydroxy-2-oxindoles via acyloin rearrangements of 2-hydroxy-indolin-3-ones generated in situ from 2-alkynyl arylazides. NEW J CHEM 2020. [DOI: 10.1039/d0nj04588h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A novel one-pot method to prepare 3-hydroxy-2-oxindoles via acyloin rearrangements of 2-hydroxy-indolin-3-ones generated in situ from 2-alkynyl arylazides has been described.
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Affiliation(s)
- Zhiqiang Zhou
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Yao Xu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Boyu Zhu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Ping Li
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Guiwen Hu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Fan Yang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Shijie Xu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Xiaoxiang Zhang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
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49
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Li P, Zhu B, Xu Y, Zhou Z, Hu G, Yang F, Xu S, Zhang X. Palladium-catalyzed one-pot cycloaddition reactions of thioureas with 3H-indol-3-ones generated in situ from 2-alkynyl arylazides: rapid and efficient access to imidazoloindolines. Org Chem Front 2020. [DOI: 10.1039/d0qo00799d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
An efficient palladium-catalyzed one-pot synthesis of imidazoloindolines from 2-alkynyl arylazides under mild reaction conditions has been described.
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Affiliation(s)
- Ping Li
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Boyu Zhu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Yao Xu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Zhiqiang Zhou
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Guiwen Hu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Fan Yang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Shijie Xu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Xiaoxiang Zhang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
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50
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Intrieri D, Carminati DM, Zardi P, Damiano C, Manca G, Gallo E, Mealli C. Indoles from Alkynes and Aryl Azides: Scope and Theoretical Assessment of Ruthenium Porphyrin-Catalyzed Reactions. Chemistry 2019; 25:16591-16605. [PMID: 31626355 DOI: 10.1002/chem.201904224] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 10/17/2019] [Indexed: 01/24/2023]
Abstract
A symbiotic experimental/computational study analyzed the Ru(TPP)(NAr)2 -catalyzed one-pot formation of indoles from alkynes and aryl azides. Thirty different C3 -substituted indoles were synthesized and the best performance, in term of yields and regioselectivities, was observed when reacting ArC≡CH alkynes with 3,5-(EWG)2 C6 H3 N3 azides, whereas the reaction was less efficient when using electron-rich aryl azides. A DFT analysis describes the reaction mechanism in terms of the energy costs and orbital/electronic evolutions; the limited reactivity of electron-rich azides was also justified. In summary, PhC≡CH alkyne interacts with one NAr imido ligand of Ru(TPP)(NAr)2 to give a residually dangling C(Ph) group, which, by coupling with a C(H) unit of the N-aryl substituent, forms a 5+6 bicyclic molecule. In the process, two subsequent spin changes allow inverting the conformation of the sp2 C(Ph) atom and its consequent electrophilic-like attack to the aromatic ring. The bicycle isomerizes to indole via a two-step outer sphere H-migration. Eventually, a 'Ru(TPP)(NAr)' mono-imido active catalyst is reformed after each azide/alkyne reaction.
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Affiliation(s)
- Daniela Intrieri
- Department of Chemistry, University of Milan, Via Golgi 19, 20133, Milan, Italy
| | - Daniela Maria Carminati
- Department of Chemistry, University of Rochester, 416 Hutchison Hall, New York, NY, 14627-0216, USA
| | - Paolo Zardi
- Department of Chemical Sciences, University of Padua, Via F. Marzolo 1, 35131, Padua, Italy
| | - Caterina Damiano
- Department of Chemistry, University of Milan, Via Golgi 19, 20133, Milan, Italy
| | - Gabriele Manca
- Istituto di Chimica dei Composti OrganoMetallici, ICCOM-CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy
| | - Emma Gallo
- Department of Chemistry, University of Milan, Via Golgi 19, 20133, Milan, Italy
| | - Carlo Mealli
- Istituto di Chimica dei Composti OrganoMetallici, ICCOM-CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy
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