1
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Liu H, Yan Q, Zeng Y, Hou X, Wang Y, Li L, Li Z. Metal-free nitro/azido cyclization of 1-acryloyl-2-cyanoindoles to access NO 2/N 3-featuring pyrrolo[1,2- a] indolediones. Org Biomol Chem 2024; 22:6490-6494. [PMID: 39072684 DOI: 10.1039/d4ob01001a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
An H2O/heating or [bis(trifluoroacetoxy)iodo]benzene promoted radical cascade nitro/azide cyclization of 1-acryloyl-2-cyanoindoles with tert-butyl nitrite/azidotrimethylsilane was accomplished, which offered a series of nitro/azide-featuring pyrrolo[1,2-a]indolediones in good yields. Meanwhile, some scale-up experiments and substituent transformations were performed to test the synthetic value. In addition, the corresponding radical intermediates were successfully detected by HRMS to support the possible reaction pathway.
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Affiliation(s)
- Huaqing Liu
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei, 071002, P. R. China.
| | - Qinqin Yan
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei, 071002, P. R. China.
| | - Yanzhao Zeng
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei, 071002, P. R. China.
| | - Xinyi Hou
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei, 071002, P. R. China.
| | - Ying Wang
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei, 071002, P. R. China.
| | - Lijun Li
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei, 071002, P. R. China.
| | - Zejiang Li
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Hebei University, Baoding, Hebei, 071002, P. R. China.
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2
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Zachmann AKZ, Drappeau JA, Liu S, Alexanian EJ. C(sp 3)-H (N-Phenyltetrazole)thiolation as an Enabling Tool for Molecular Diversification. Angew Chem Int Ed Engl 2024; 63:e202404879. [PMID: 38657161 DOI: 10.1002/anie.202404879] [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: 03/11/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 04/26/2024]
Abstract
Methods enabling the broad diversification of C(sp3)-H bonds from a common intermediate are especially valuable in chemical synthesis. Herein, we report a site-selective (N-phenyltetrazole)thiolation of aliphatic and (hetero)benzylic C(sp3)-H bonds using a commercially available disulfide to access N-phenyltetrazole thioethers. The thioether products are readily elaborated in diverse fragment couplings for C-C, C-O, or C-N construction. The C-H functionalization proceeds via a radical-chain pathway involving hydrogen atom transfer by the electron-poor N-phenyltetrazolethiyl radical. Hexafluoroisopropanol was found to be essential to reactions involving aliphatic C(sp3)-H thiolation, with computational analysis consistent with dual hydrogen bonding of the N-phenyltetrazolethiyl radical imparting increased radical electrophilicity to facilitate the hydrogen atom transfer. Substrate is limiting reagent in all cases, and the reaction displays an exceptional functional group tolerance well suited to applications in late-stage diversification.
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Affiliation(s)
- Ashley K Z Zachmann
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Justine A Drappeau
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Shubin Liu
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Research Computing Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Erik J Alexanian
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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3
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Qiao K, Yang JF, Chen Z, Zhu Y, Jiang WF, Li F, Shi L. Minisci-Type Dehydrogenative Coupling of C(sp 3)-H and N-Heteroaromatics Enabled by Photoelectrochemical Hydrogen Atom Transfer. Org Lett 2024; 26:5805-5810. [PMID: 38949597 DOI: 10.1021/acs.orglett.4c01998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
Minisci-type dehydrogenative coupling of C(sp3)-H and N-heteroaromatics was performed with N-hydroxysuccinimide as a hydrogen atom transfer catalyst in a photoelectrochemical cell composed of a mesoporous BiVO4 photoanode and a Pt electrode. In the absence of metal catalysts and chemical oxidants, a range of N-heteroarenes (e.g., quinolines, isoquinolines, and quinoxaline) can undergo coupling with various C(sp3)-H partners to form the corresponding products in excellent yields.
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Affiliation(s)
- Kaikai Qiao
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Jun-Feng Yang
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Zhi Chen
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yong Zhu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - Wen-Feng Jiang
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Fei Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - Lei Shi
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
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4
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Queffélec C, Pati PB, Pellegrin Y. Fifty Shades of Phenanthroline: Synthesis Strategies to Functionalize 1,10-Phenanthroline in All Positions. Chem Rev 2024; 124:6700-6902. [PMID: 38747613 DOI: 10.1021/acs.chemrev.3c00543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
1,10-Phenanthroline (phen) is one of the most popular ligands ever used in coordination chemistry due to its strong affinity for a wide range of metals with various oxidation states. Its polyaromatic structure provides robustness and rigidity, leading to intriguing features in numerous fields (luminescent coordination scaffolds, catalysis, supramolecular chemistry, sensors, theranostics, etc.). Importantly, phen offers eight distinct positions for functional groups to be attached, showcasing remarkable versatility for such a simple ligand. As a result, phen has become a landmark molecule for coordination chemists, serving as a must-use ligand and a versatile platform for designing polyfunctional arrays. The extensive use of substituted phenanthroline ligands with different metal ions has resulted in a diverse array of complexes tailored for numerous applications. For instance, these complexes have been utilized as sensitizers in dye-sensitized solar cells, as luminescent probes modified with antibodies for biomaterials, and in the creation of elegant supramolecular architectures like rotaxanes and catenanes, exemplified by Sauvage's Nobel Prize-winning work in 2016. In summary, phen has found applications in almost every facet of chemistry. An intriguing aspect of phen is the specific reactivity of each pair of carbon atoms ([2,9], [3,8], [4,7], and [5,6]), enabling the functionalization of each pair with different groups and leading to polyfunctional arrays. Furthermore, it is possible to differentiate each position in these pairs, resulting in non-symmetrical systems with tremendous versatility. In this Review, the authors aim to compile and categorize existing synthetic strategies for the stepwise polyfunctionalization of phen in various positions. This comprehensive toolbox will aid coordination chemists in designing virtually any polyfunctional ligand. The survey will encompass seminal work from the 1950s to the present day. The scope of the Review will be limited to 1,10-phenanthroline, excluding ligands with more intracyclic heteroatoms or fused aromatic cycles. Overall, the primary goal of this Review is to highlight both old and recent synthetic strategies that find applicability in the mentioned applications. By doing so, the authors hope to establish a first reference for phenanthroline synthesis, covering all possible positions on the backbone, and hope to inspire all concerned chemists to devise new strategies that have not yet been explored.
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Affiliation(s)
| | | | - Yann Pellegrin
- Nantes Université, CEISAM UMR 6230, F-44000 Nantes, France
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5
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Wan Q, Wu XD, Hou ZW, Ma Y, Wang L. Organophotoelectrocatalytic C(sp 2)-H alkylation of heteroarenes with unactivated C(sp 3)-H compounds. Chem Commun (Camb) 2024; 60:5502-5505. [PMID: 38699797 DOI: 10.1039/d4cc01335b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
An organophotoelectrocatalytic method for the C(sp2)-H alkylation of heteroarenes with unactivated C(sp3)-H compounds through dehydrogenation cross-coupling has been developed. The C(sp2)-H alkylation combines organic catalysis, photochemistry and electrochemistry, avoiding the need for external metal-reagents, HAT-reagents, and oxidants. This protocol exhibits good substrate tolerance and functional group compatibility, providing a straightforward and powerful pathway to access a variety of alkylated heteroarenes under green conditions.
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Affiliation(s)
- Qinhui Wan
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
| | - Xia-Die Wu
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
| | - Zhong-Wei Hou
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
| | - Yongmin Ma
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
| | - Lei Wang
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
- College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, P. R. China
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6
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Yang JF, Liu YF, Wei LL, Qiao KK, Zhao YQ, Shi L. Minisci-Type Dehydrogenative Coupling of N-Heteroaromatic Rings with Inert C(sp 3)-H Enabled by a Visible-Light-Catalyzed Intermolecular Hydrogen Atom Transfer Process. J Org Chem 2024; 89:4249-4260. [PMID: 38443760 DOI: 10.1021/acs.joc.4c00093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
The Minisci-type dehydrogenative coupling of N-heteroaromatic rings with inert C-H or Si-H partners via visible-light-catalyzed hydrogen atom transfer has been reported. This methodology allows the coupling reactions to be carried out in water as a solvent under air atmospheric conditions with visible-light illumination. A wide range of inert C-H and Si-H partners could be directly coupled with various N-aromatic heterocycles to deliver products in good to excellent yields.
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Affiliation(s)
- Jun-Feng Yang
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yun-Fei Liu
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Lin-Lin Wei
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Kai-Kai Qiao
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yan-Qiu Zhao
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Lei Shi
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
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7
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Kumar Jha R, Rohilla K, Jain S, Parganiha D, Kumar S. Blue-Light Irradiated Mn(0)-Catalyzed Hydroxylation and C(sp 3 )-H Functionalization of Unactivated Alkanes with C(sp 2 )-H Bonds of Quinones for Alkylated Hydroxy Quinones and Parvaquone. Chemistry 2024; 30:e202303537. [PMID: 37991931 DOI: 10.1002/chem.202303537] [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: 11/14/2023] [Revised: 11/20/2023] [Accepted: 11/22/2023] [Indexed: 11/24/2023]
Abstract
Site-selective C(sp3 )-H functionalization of unreactive hydrocarbons is always challenging due to its inherited chemical inertness, slightly different reactivity of various C-H bonds, and intrinsically high bond dissociation energies. Here, a site-selective C-H alkylation of naphthoquinone with unactivated hydrocarbons using Mn2 (CO)10 as a catalyst under blue-light (457 nm) irradiation without any external acid or base and pre-functionalization is presented. The selective C-H functionalization of tertiary over secondary and secondary over primary C(sp3 )-H bonds in abundant chemical feedstocks was achieved, and hydroxylation of quinones was realized in situ by employing the developed methodology. This protocol provides a new catalytic system for the direct construction of high-value-added compounds, namely, parvaquone (a commercially available drug used to treat theileriosis) and its derivatives under ambient reaction conditions. Moreover, this operationally simple protocol applies to various linear-, branched-, and cyclo-alkanes with high degrees of site selectivity under blue-light irradiated conditions and could provide rapid and straightforward access to versatile methodologies for upgrading feedstock chemicals. Mechanistic insight by radical trapping, radical scavenging, EPR, and other controlled experiments well corroborated with DFT studies suggest that the reaction proceeds by a radical pathway.
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Affiliation(s)
- Raushan Kumar Jha
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh, 462066, India
| | - Komal Rohilla
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh, 462066, India
| | - Saket Jain
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh, 462066, India
| | - Devendra Parganiha
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh, 462066, India
| | - Sangit Kumar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh, 462066, India
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8
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Cao X, Wei L, Yang J, Song H, Wei Y. A visible-light-induced bromine radical initiates direct C-H alkylation of heteroaromatics. Org Biomol Chem 2024; 22:1157-1161. [PMID: 38224149 DOI: 10.1039/d3ob02047a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Herein, a photoinduced direct C(sp2)-H alkylation of N-heteroaromatics by using commercially available tetrabutylammonium tribromide (TBATB) as a HAT reagent is described. The method uses O2 as the oxidant, and features metal-free, mild reaction conditions and good functional group compatibility.
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Affiliation(s)
- Xiangxue Cao
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi, 832003, China.
| | - Lanfeng Wei
- Xinjiang Key Laboratory of Coal Mine Disaster Intelligent Prevention and Emergency Response, Xinjiang Institute of Engineering, Urumqi 830023, China.
| | - Jinbo Yang
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi, 832003, China.
| | - Huanhuan Song
- Bingtuan Energy Development Institute, Shihezi University, Shihezi, 832003, China.
| | - Yu Wei
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi, 832003, China.
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9
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Li QY, Cheng S, Ye Z, Huang T, Yang F, Lin YM, Gong L. Visible light-triggered selective C(sp 2)-H/C(sp 3)-H coupling of benzenes with aliphatic hydrocarbons. Nat Commun 2023; 14:6366. [PMID: 37821440 PMCID: PMC10567795 DOI: 10.1038/s41467-023-42191-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 10/02/2023] [Indexed: 10/13/2023] Open
Abstract
The direct and selective coupling of benzenes with aliphatic hydrocarbons is a promising strategy for C(sp2)-C(sp3) bond formation using readily available starting materials, yet it remains a significant challenge. In this study, we have developed a simplified photochemical system that incorporates catalytic amounts of iron(III) halides as multifunctional reagents and air as a green oxidant to address this synthetic problem. Under mild conditions, the reaction between a strong C(sp2)-H bond and a robust C(sp3)-H bond has been achieved, affording a broad range of cross-coupling products with high yields and commendable chemo-, site-selectivity. The iron halide acts as a multifunctional reagent that responds to visible light, initiates C-centered radicals, induces single-electron oxidation to carbocations, and participates in a subsequent Friedel-Crafts-type process. The gradual release of radical species and carbocation intermediates appears to be critical for achieving desirable reactivity and selectivity. This eco-friendly, cost-efficient approach offers access to various building blocks from abundant hydrocarbon feedstocks, and demonstrates the potential of iron halides in sustainable synthesis.
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Affiliation(s)
- Qian-Yu Li
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Shiyan Cheng
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Ziqi Ye
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Tao Huang
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Fuxing Yang
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Yu-Mei Lin
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China.
| | - Lei Gong
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China.
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, 361005, China.
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10
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Roy S, Panja S, Sahoo SR, Chatterjee S, Maiti D. Enroute sustainability: metal free C-H bond functionalisation. Chem Soc Rev 2023; 52:2391-2479. [PMID: 36924227 DOI: 10.1039/d0cs01466d] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
The term "C-H functionalisation" incorporates C-H activation followed by its transformation. In a single line, this can be defined as the conversion of carbon-hydrogen bonds into carbon-carbon or carbon-heteroatom bonds. The catalytic functionalisation of C-H bonds using transition metals has emerged as an atom-economical technique to engender new bonds without activated precursors which can be considered as a major drawback while attempting large-scale synthesis. Replacing the transition-metal-catalysed approach with a metal-free strategy significantly offers an alternative route that is not only inexpensive but also environmentally benign to functionalize C-H bonds. Recently metal free synthetic approaches have been flourishing to functionalize C-H bonds, motivated by the search for greener, cost-effective, and non-toxic catalysts. In this review, we will highlight the comprehensive and up-to-date discussion on recent examples of ground-breaking research on green and sustainable metal-free C-H bond functionalisation.
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Affiliation(s)
- Sayan Roy
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Subir Panja
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Sumeet Ranjan Sahoo
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Sagnik Chatterjee
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India. .,Department of Interdisciplinary Program in Climate Studies, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
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11
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Liu XH, Yu HY, Huang JY, Zhou XT, Xue C, Ji HB. Time-resolved EPR revealed C(sp 3)–H activation through a photo-enhanced phthalimide- N-oxyl (PINO) radical. Chem Commun (Camb) 2023; 59:243-246. [DOI: 10.1039/d2cc05906a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The time-resolved EPR technique under operando photochemical conditions as an efficient strategy to investigate the fast formation of abundant long-lived PINO radicals and their activation of the C(sp3)–H reaction is reported.
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Affiliation(s)
- Xiao-Hui Liu
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Hai-Yang Yu
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Jia-Ying Huang
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Xian-Tai Zhou
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Can Xue
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Hong-Bing Ji
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
- Advanced Energy Science and Technology Guangdong Laboratory, Huizhou, Guangdong, 516003, China
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12
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Le Saux E, Georgiou E, Dmitriev IA, Hartley WC, Melchiorre P. Photochemical Organocatalytic Functionalization of Pyridines via Pyridinyl Radicals. J Am Chem Soc 2022; 145:47-52. [PMID: 36574031 PMCID: PMC9837848 DOI: 10.1021/jacs.2c12466] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We report a photochemical method for the functionalization of pyridines with radicals derived from allylic C-H bonds. Overall, two substrates undergo C-H functionalization to form a new C(sp2)-C(sp3) bond. The chemistry harnesses the unique reactivity of pyridinyl radicals, generated upon single-electron reduction of pyridinium ions, which undergo effective coupling with allylic radicals. This novel mechanism enables distinct positional selectivity for pyridine functionalization that diverges from classical Minisci chemistry. Crucial was the identification of a dithiophosphoric acid that masters three catalytic tasks, sequentially acting as a Brønsted acid for pyridine protonation, a single electron transfer (SET) reductant for pyridinium ion reduction, and a hydrogen atom abstractor for the activation of allylic C(sp3)-H bonds. The resulting pyridinyl and allylic radicals then couple with high regioselectivity.
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Affiliation(s)
- Emilien Le Saux
- ICIQ
− Institute of Chemical Research of Catalonia, Avinguda Països Catalans
16, 43007 Tarragona, Spain,URV
− Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Eleni Georgiou
- ICIQ
− Institute of Chemical Research of Catalonia, Avinguda Països Catalans
16, 43007 Tarragona, Spain,URV
− Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Igor A. Dmitriev
- ICIQ
− Institute of Chemical Research of Catalonia, Avinguda Països Catalans
16, 43007 Tarragona, Spain,URV
− Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Will C. Hartley
- ICIQ
− Institute of Chemical Research of Catalonia, Avinguda Països Catalans
16, 43007 Tarragona, Spain
| | - Paolo Melchiorre
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy,
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13
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Prajapati VD, Prajapati RV, Purohit VB, Avalani JR, Sapariya NH, Kamani RD, Karad SC, Raval DK. N‐Chlorosuccinimide Mediated Regioselective Sulfenylation and Halogenation of 4
H
‐Pyrido[1,2‐
a
]pyrimidin‐4‐ones at Room Temperature. ChemistrySelect 2022. [DOI: 10.1002/slct.202204126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Vaibhav D. Prajapati
- Department of Chemistry Sardar Patel University Vallabh Vidyanagar- 388120 Gujarat India
| | - Ronak V. Prajapati
- Department of Chemistry Sardar Patel University Vallabh Vidyanagar- 388120 Gujarat India
| | - Vishal B. Purohit
- International Centre for Research on Innovative Biobased Materials (ICRI-BioM)- International Research Agenda Lodz University of Technology Zeromskiego 116 90-924 Lodz Poland
| | - Jemin R. Avalani
- Shri A. N. Patel P. G. Institute of Science & Research Anand 388001, Gujarat India
| | | | - Ronak D. Kamani
- Department of Chemistry Sardar Patel University Vallabh Vidyanagar- 388120 Gujarat India
| | - Sharad C. Karad
- Department of Chemistry Sardar Patel University Vallabh Vidyanagar- 388120 Gujarat India
| | - Dipak K. Raval
- Department of Chemistry Sardar Patel University Vallabh Vidyanagar- 388120 Gujarat India
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14
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Miller AS, Alexanian EJ. Heteroarylation of unactivated C-H bonds suitable for late-stage functionalization. Chem Sci 2022; 13:11878-11882. [PMID: 36320922 PMCID: PMC9580477 DOI: 10.1039/d2sc04605a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 09/25/2022] [Indexed: 11/21/2022] Open
Abstract
The late-stage introduction of diverse heterocycles onto complex small molecules enables efficient access to new medicinally relevant compounds. An attractive approach to such a transformation would utilize the ubiquitous aliphatic C-H bonds of a complex substrate. Herein, we report a system that enables direct C-H heteroarylation using a stable, commercially available O-alkenylhydroxamate with heterocyclic sulfone partners. The C-H heteroarylation proceeds efficiently with a range of aliphatic substrates and common heterocycles, and is a rare example of heteroarylation of strong C-H bonds. Importantly, the present approach is amenable to late-stage functionalization as the substrate is the limiting reagent in all cases.
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Affiliation(s)
- Austin S. Miller
- Department of Chemistry, The University of North Carolina at Chapel HillChapel HillNorth Carolina 27599USA
| | - Erik J. Alexanian
- Department of Chemistry, The University of North Carolina at Chapel HillChapel HillNorth Carolina 27599USA
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15
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Li JF, Pan D, Wang HR, Zhang T, Li Y, Huang G, Ye M. Enantioselective C2-H Alkylation of Pyridines with 1,3-Dienes via Ni-Al Bimetallic Catalysis. J Am Chem Soc 2022; 144:18810-18816. [PMID: 36205623 DOI: 10.1021/jacs.2c09306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A chiral phosphine oxide-ligated Ni-Al bimetallic catalyst was used to realize an enantioselective C2-H alkylation of pyridines without the need of a C2-block. A wide range of pyridines, including unsubstituted pyridine, C3, C4, and C2-substituted pyridines, and even complex pyridine-containing bioactive molecules are well compatible with the reaction, providing up to 81% yield and up to 97% ee.
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Affiliation(s)
- Jiang-Fei Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Frontiers Science Center for New Organic Matter, Tianjin 300071, China
| | - Deng Pan
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, China
| | - Hao-Rui Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Frontiers Science Center for New Organic Matter, Tianjin 300071, China
| | - Tao Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Frontiers Science Center for New Organic Matter, Tianjin 300071, China
| | - Yi Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Frontiers Science Center for New Organic Matter, Tianjin 300071, China
| | - Genping Huang
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, China
| | - Mengchun Ye
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Frontiers Science Center for New Organic Matter, Tianjin 300071, China.,Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
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16
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Liu XH, Yu HY, Huang JY, Su JH, Xue C, Zhou XT, He YR, He Q, Xu DJ, Xiong C, Ji HB. Biomimetic catalytic aerobic oxidation of C-sp(3)-H bonds under mild conditions using galactose oxidase model compound Cu IIL. Chem Sci 2022; 13:9560-9568. [PMID: 36091900 PMCID: PMC9400635 DOI: 10.1039/d2sc02606f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 07/28/2022] [Indexed: 11/21/2022] Open
Abstract
Developing highly efficient catalytic protocols for C-sp(3)-H bond aerobic oxidation under mild conditions is a long-desired goal of chemists. Inspired by nature, a biomimetic approach for the aerobic oxidation of C-sp(3)-H by galactose oxidase model compound CuIIL and NHPI (N-hydroxyphthalimide) was developed. The CuIIL-NHPI system exhibited excellent performance in the oxidation of C-sp(3)-H bonds to ketones, especially for light alkanes. The biomimetic catalytic protocol had a broad substrate scope. Mechanistic studies revealed that the CuI-radical intermediate species generated from the intramolecular redox process of CuIILH2 was critical for O2 activation. Kinetic experiments showed that the activation of NHPI was the rate-determining step. Furthermore, activation of NHPI in the CuIIL-NHPI system was demonstrated by time-resolved EPR results. The persistent PINO (phthalimide-N-oxyl) radical mechanism for the aerobic oxidation of C-sp(3)-H bond was demonstrated.
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Affiliation(s)
- Xiao-Hui Liu
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University Zhuhai 519082 China
| | - Hai-Yang Yu
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University Zhuhai 519082 China
| | - Jia-Ying Huang
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University Zhuhai 519082 China
| | - Ji-Hu Su
- CAS Key Laboratory of Microscale Magnetic Resonance, University of Science and Technology of China Hefei 230026 China
| | - Can Xue
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University Zhuhai 519082 China
| | - Xian-Tai Zhou
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University Zhuhai 519082 China
| | - Yao-Rong He
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University Guangzhou 510275 China
| | - Qian He
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University Guangzhou 510275 China
| | - De-Jing Xu
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University Zhuhai 519082 China
| | - Chao Xiong
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University Guangzhou 510275 China
| | - Hong-Bing Ji
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University Guangzhou 510275 China
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17
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Bhakat M, Khatua B, Guin J. Photocatalytic Aerobic Coupling of Azaarenes and Alkanes via Nontraditional Cl • Generation. Org Lett 2022; 24:5276-5280. [PMID: 35839079 DOI: 10.1021/acs.orglett.2c01784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Herein, we demonstrate a nonconventional photocatalytic generation of Cl• from a common chlorinated solvent, dichloroethane, under aerobic conditions and its successful utilization toward the cross-dehydrogenative coupling of alkanes and azaarenes via hydrogen atom transfer with Cl•. The process is free from chloride salt, toxic oxidant, and UV light. It is applicable to a broad spectrum of substrates. The proposed mechanism involving Cl• is supported by a series of mechanistic investigations.
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Affiliation(s)
- Manotosh Bhakat
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata-700032, India
| | - Bitasik Khatua
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata-700032, India
| | - Joyram Guin
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata-700032, India
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18
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Yu M, Zhou Z, Chen Y, Wang Z, Wang W, Sun K. Regioselective C 6-H Hydroxyalkylation of Purines and Purine Nucleosides via α-C-H Functionalization of Alcohols at Room Temperature. Org Lett 2022; 24:4886-4891. [PMID: 35775741 DOI: 10.1021/acs.orglett.2c01680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The highly regioselective C6-H hydroxylalkylation of purines and purine nucleosides within 10 min via the α-C(sp3)-H functionalization of alcohols at room temperature is reported here for the first time. The reaction tolerated various functional groups, which have the potential for further modification to afford other valuable molecules. The reported method avoids metal catalysts, light, and protecting groups, giving a direct strategy to access 6-substitued alkylated purines and nucleosides with pharmaceutical bioactivities.
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Affiliation(s)
- Mingwu Yu
- School of Chemistry and Materials Science, Ludong University, Yantai, Shandong 264025, P. R. China
| | - Zheng Zhou
- School of Chemistry and Materials Science, Ludong University, Yantai, Shandong 264025, P. R. China
| | - Yiwen Chen
- School of Chemistry and Materials Science, Ludong University, Yantai, Shandong 264025, P. R. China
| | - Zhichuan Wang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, Shandong 264005, P. R. China
| | - Weili Wang
- School of Chemistry and Materials Science, Ludong University, Yantai, Shandong 264025, P. R. China
| | - Kai Sun
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, Shandong 264005, P. R. China
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19
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Shee M, Singh NDP. Photogenerated Azido Radical Mediated Oxidation: Access to Carbonyl Functionality from Alcohols, Alkylarenes, and Olefins via Organophotoredox. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maniklal Shee
- Department of Chemistry Indian Institute of Technology Kharagpur 721302 Kharagpur West Bengal India
| | - N. D. Pradeep Singh
- Department of Chemistry Indian Institute of Technology Kharagpur 721302 Kharagpur West Bengal India
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20
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Sharique M, Majhi J, Dhungana RK, Kammer LM, Krumb M, Lipp A, Romero E, Molander GA. A practical and sustainable two-component Minisci alkylation via photo-induced EDA-complex activation. Chem Sci 2022; 13:5701-5706. [PMID: 35694363 PMCID: PMC9116295 DOI: 10.1039/d2sc01363k] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 04/09/2022] [Indexed: 12/18/2022] Open
Abstract
An operationally simple, open-air, and efficient light-mediated Minisci C-H alkylation method is described, based on the formation of an electron donor-acceptor (EDA) complex between nitrogen-containing heterocycles and redox-active esters. In contrast to previously reported protocols, this method does not require a photocatalyst, an external single electron transfer agent, or an oxidant additive. Achieved under mildly acidic and open-air conditions, the reaction incorporates primary-, secondary-, and tertiary radicals, including bicyclo[1.1.1]pentyl (BCP) radicals, along with various heterocycles to generate Minisci alkylation products in moderate to good yields. Additionally, the method is exploited to generate a stereo-enriched, hetereoaryl-substituted carbohydrate.
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Affiliation(s)
- Mohammed Sharique
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Jadab Majhi
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Roshan K Dhungana
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Lisa Marie Kammer
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Matthias Krumb
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Alexander Lipp
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Eugénie Romero
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
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21
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Ruan S, Zhou C, Li L, Wang L, Liu J, Li P. Microwave-accelerated and benzoyl peroxide (BPO)-initiated cyclization of 1,5-enynes having cyano groups with cyclic alkanes under metal-free conditions. Org Biomol Chem 2022; 20:3817-3822. [PMID: 35467683 DOI: 10.1039/d2ob00430e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A novel and efficient method for preparing exocyclic indan derivatives, with this method involving benzoyl peroxide (BPO)-initiated cyclization of 1,5-enynes having cyano groups with simple cyclic alkanes under microwave irradiation, has been developed. The presented approach showed advantages of simple conditions, an environmentally friendly protocol, good functional-group tolerance, and high yields of products.
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Affiliation(s)
- Shuchen Ruan
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Chao Zhou
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Laiqiang Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Lei Wang
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China. .,Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China.
| | - Jie Liu
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Pinhua Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China. .,Anhui Laboratory of Clean Catalytic Engineering and College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. of China.
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22
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Umakoshi Y, Takemoto Y, Tsubouchi A, Zhdankin VV, Yoshimura A, Saito A. Dehydrogenative Cycloisomerization/Arylation Sequence of
N
‐Propargyl Carboxamides with Arenes by Iodine(III)‐Catalysis. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yuki Umakoshi
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
| | - Yusuke Takemoto
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
| | - Akira Tsubouchi
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
| | - Viktor V. Zhdankin
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
| | - Akira Yoshimura
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
- Research School of Chemistry and Applied Biomedical Sciences The Tomsk Polytechnic University, postCode/>634050 Tomsk Russia
| | - Akio Saito
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
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23
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Zeng CL, Wang H, Gao D, Zhang Z, Ji D, He W, Liu CK, Yang Z, Fang Z, Guo K. CF 3SO 2Na-Mediated Visible-Light-Induced Cross-Dehydrogenative Coupling of Heteroarenes with Aliphatic C(sp 3)-H Bonds. Org Lett 2022; 24:3244-3248. [PMID: 35446591 DOI: 10.1021/acs.orglett.2c01032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Minisci-type reaction is one of the important means to construct C(sp3)-H functionalization of heteroarenes. According to traditional methods, stoichiometric amounts of precious transition metal catalysts and chemical oxidants were required at high temperatures. Here, a green and gentle novel Minisci-type method was developed via visible-light-induced cross-dehydrogenative coupling of heteroarenes with aliphatic C(sp3)-H bonds under oxidant-free and transition-metal-catalyst-free conditions. Only the catalytic equivalent of CF3SO2Na and room temperature were required to maintain an efficient reaction.
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Affiliation(s)
- Cui-Lian Zeng
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P.R. China
| | - Hao Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P.R. China
| | - Di Gao
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P.R. China
| | - Zhen Zhang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P.R. China
| | - Dong Ji
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P.R. China
| | - Wei He
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P.R. China
| | - Cheng-Kou Liu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P.R. China
| | - Zhao Yang
- College of Engineering, China Pharmaceutical University, Nanjing 210003, P.R. China
| | - Zheng Fang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P.R. China.,State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, P.R. China
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P.R. China.,State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, P.R. China
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24
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25
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Wang M, Zhang Y, Yang X, Sun P. Phenanthrenequinone (PQ) catalyzed cross-dehydrogenative coupling of alkanes with quinoxalin-2(1 H)-ones and simple N-heteroarenes under visible light irradiation. Org Biomol Chem 2022; 20:2467-2472. [PMID: 35262545 DOI: 10.1039/d2ob00278g] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A direct and convenient strategy to 3-alkylquinoxalin-2(1H)-ones and other alkyl N-heteroarenes via a photocatalyzed alkylation of quinoxalin-2(1H)-ones and other N-heterocycles with commercially available, low-cost alkanes under ambient conditions using phenanthrenequinone (PQ) as a photocatalyst was developed. This transformation has advantages of environment-friendly protocol, mild conditions, good functional-group tolerance, and high yields of products.
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Affiliation(s)
- Min Wang
- 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. .,Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; Department of chemistry, Huaibei Normal University, Huaibei, Anhui 235000, China.
| | - Yicheng Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; Department of chemistry, Huaibei Normal University, Huaibei, Anhui 235000, China.
| | - Xinyu Yang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; Department of chemistry, Huaibei Normal University, Huaibei, Anhui 235000, 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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26
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Tan Z, He X, Xu K, Zeng C. Electrophotocatalytic C-H Functionalization of N-Heteroarenes with Unactivated Alkanes under External Oxidant-Free Conditions. CHEMSUSCHEM 2022; 15:e202102360. [PMID: 34967138 DOI: 10.1002/cssc.202102360] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/29/2021] [Indexed: 06/14/2023]
Abstract
The Minisci alkylation of N-heteroarenes with unactivated alkanes under external oxidant-free conditions provides an economically attractive route to access alkylated N-heteroarenes but remains underdeveloped. Herein, a new electrophotocatalytic strategy to access alkyl radicals from strong C(sp3 )-H bonds was reported for the following Minisci alkylation reactions in the absence of chemical oxidants. This strategy realized the first example of cerium-catalyzed Minisci alkylation reaction directly from abundant unactivated alkanes with excellent atom economy. It is anticipated that the general design principle would enrich catalytic strategies to explore the functionalizations of strong C(sp3 )-H bonds under external oxidant-free conditions with H2 evolution.
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Affiliation(s)
- Zhoumei Tan
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P.R. China
| | - Xinrui He
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P.R. China
| | - Kun Xu
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P.R. China
| | - Chengchu Zeng
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P.R. China
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27
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Liang Y, Niu L, Liang X, Wang S, Wang P, Lei A. Electrooxidation‐Induced
C(sp
3
)‐H/ C(sp
2
)‐H
Radical‐Radical
Cross‐coupling between Xanthanes and Electron‐rich Arenes. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200020] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuwei Liang
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University Wuhan Hubei 430072 China
| | - Linbin Niu
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University Wuhan Hubei 430072 China
| | - Xing‐An Liang
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University Wuhan Hubei 430072 China
| | - Shengchun Wang
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University Wuhan Hubei 430072 China
| | - Pengjie Wang
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University Wuhan Hubei 430072 China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University Wuhan Hubei 430072 China
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28
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Shee M, Singh NDP. Chemical versatility of azide radical: journey from a transient species to synthetic accessibility in organic transformations. Chem Soc Rev 2022; 51:2255-2312. [PMID: 35229836 DOI: 10.1039/d1cs00494h] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The generation of azide radical (N3˙) occurs from its precursors primarily via a single electron transfer (SET) process or homolytic cleavage by chemical methods or advanced photoredox/electrochemical methods. This in situ generated transient open-shell species has unique characteristic features that set its reactivity. In the past, the azide radical was widely used for various studies in radiation chemistry as a 1e- oxidant of biologically important molecules, but now it is being exploited for synthetic applications based on its addition and intermolecular hydrogen atom transfer (HAT) abilities. Due to the significant role of nitrogen-containing molecules in synthesis, drug discovery, biological, and material sciences, the direct addition onto unsaturated bonds for the simultaneous construction of C-N bond with other (C-X) bonds are indeed worth highlighting. Moreover, the ability to generate O- or C-centered radicals by N3˙ via electron transfer (ET) and intermolecular HAT processes is also well documented. The purpose of controlling the reactivity of this short-lived intermediate in organic transformations drives us to survey: (i) the history of azide radical and its structural properties (thermodynamic, spectroscopic, etc.), (ii) chemical reactivities and kinetics, (iii) methods to produce N3˙ from various precursors, (iv) several significant azide radical-mediated transformations in the field of functionalization with unsaturated bonds, C-H functionalization via HAT, tandem, and multicomponent reaction with a critical analysis of underlying mechanistic approaches and outcomes, (v) concept of taming the reactivity of azide radicals for potential opportunities, in this review.
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Affiliation(s)
- Maniklal Shee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
| | - N D Pradeep Singh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
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29
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Wang X, Lei J, Guo S, Zhang Y, Ye Y, Tang S, Sun K. Radical selenation of C(sp 3)-H bonds to asymmetric selenides and mechanistic study. Chem Commun (Camb) 2022; 58:1526-1529. [PMID: 35050276 DOI: 10.1039/d1cc06323e] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Selenides are important structural motifs with a broad range of biological activities and versatile transformational abilities. In this study, a novel and mild method was developed for the facile synthesis of asymmetric selenides under metal-free conditions. The key features of this reaction include good functional-group tolerance, the use of readily available reagents and cheap, low-toxicity solvent, and amenability to gram-scale synthesis. The results of preliminary radical-trapping experiments and a kinetic isotope effect study support a radical process.
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Affiliation(s)
- Xin Wang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, Shandong, P. R. China.
| | - Jia Lei
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, Shandong, P. R. China.
| | - Sa Guo
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, Shandong, P. R. China.
| | - Yan Zhang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, Shandong, P. R. China.
| | - Yong Ye
- College of Chemistry, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Shi Tang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, China
| | - Kai Sun
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, Shandong, P. R. China.
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30
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Hui C, Antonchick AP. Iodonitrene: a direct metal-free electrophilic aminating reagent. Org Chem Front 2022. [DOI: 10.1039/d2qo00739h] [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
Iodonitrene is a new type of reactive electrophilic aminating reagent that opens up opportunities for new discoveries.
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Affiliation(s)
- Chunngai Hui
- Max Planck Institute of Molecular Physiology, Department of Chemical Biology, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany
- Technical University Dortmund, Faculty of Chemistry and Chemical Biology, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Andrey P. Antonchick
- Max Planck Institute of Molecular Physiology, Department of Chemical Biology, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany
- Technical University Dortmund, Faculty of Chemistry and Chemical Biology, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
- Nottingham Trent University, School of Science and Technology, Department of Chemistry and Forensics, Clifton Lane, NG11 8NS Nottingham, UK
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31
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Sebastian D, Willoughby PH, Lakshman MK. Cross-dehydrogenative coupling of ethers and amides with the tautomerizable quinazolinones, and mechanistic studies. Org Biomol Chem 2022; 20:5735-5746. [DOI: 10.1039/d2ob00874b] [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
Cross-dehydrogenative coupling reactions have been utilized to alkylate 4(3H)-quinazolinones with ethers and amides, using catalytic n-Bu4NI and t-BuOOH as oxidant. Reactions with amides represent the first examples under such conditions....
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32
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Chang C, Zhang H, Wu X, Zhu C. Radical trifunctionalization of hexenenitrile via remote cyano migration. Chem Commun (Camb) 2021; 58:1005-1008. [PMID: 34940775 DOI: 10.1039/d1cc06687k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel radical-mediated trifunctionalization of hexenenitriles via the strategy of remote functional group migration is disclosed. A portfolio of functionalized hexenenitriles are employed as substrates. After difunctionalization of the unactivated alkenyl part via remote cyano migration, the in situ formed radical intermediate is captured by an azido radical, thus enabling the trifunctionalization. The reaction features mild conditions and broad functional group compatibility, leading to valuable products bearing multiple useful groups. This protocol further extends the scope of remote functional group migration.
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Affiliation(s)
- Chenyang Chang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, China.
| | - Huihui Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, China.
| | - Xinxin Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, China.
| | - Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, China. .,Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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33
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Weigel WK, Dang HT, Feceu A, Martin DBC. Direct radical functionalization methods to access substituted adamantanes and diamondoids. Org Biomol Chem 2021; 20:10-36. [PMID: 34651636 DOI: 10.1039/d1ob01916c] [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
Adamantane derivatives have diverse applications in the fields of medicinal chemistry, catalyst development and nanomaterials, owing to their unique structural, biological and stimulus-responsive properties, among others. The synthesis of substituted adamantanes and substituted higher diamondoids is frequently achieved via carbocation or radical intermediates that have unique stability and reactivity when compared to simple hydrocarbon derivatives. In this review, we discuss the wide range of radical-based functionalization reactions that directly convert diamondoid C-H bonds to C-C bonds, providing a variety of products incorporating diverse functional groups (alkenes, alkynes, arenes, carbonyl groups, etc.). Recent advances in the area of selective C-H functionalization are highlighted with an emphasis on the H-atom abstracting species and their ability to activate the particularly strong C-H bonds that are characteristic of these caged hydrocarbons, providing insights that can be applied to the C-H functionalization of other substrate classes.
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Affiliation(s)
- William K Weigel
- Chemistry, University of Iowa, Iow City, Iowa, USA.,University of California Riverside, Riverside, California, USA.
| | - Hoang T Dang
- Chemistry, University of Iowa, Iow City, Iowa, USA
| | - Abigail Feceu
- University of California Riverside, Riverside, California, USA.
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34
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Liu Y, Shi B, Liu Z, Gao R, Huang C, Alhumade H, Wang S, Qi X, Lei A. Time-Resolved EPR Revealed the Formation, Structure, and Reactivity of N -Centered Radicals in an Electrochemical C(sp 3)-H Arylation Reaction. J Am Chem Soc 2021; 143:20863-20872. [PMID: 34851107 DOI: 10.1021/jacs.1c09341] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Electrochemical synthesis has been rapidly developed over the past few years, while a vast majority of the reactions proceed through a radical pathway. Understanding the properties of radical intermediates is crucial in the mechanistic study of electrochemical transformations and will be beneficial for developing new reactions. Nevertheless, it is rather difficult to determine the "live" radical intermediates due to their high reactivity. In this work, the formation and structure of sulfonamide N-centered radicals have been researched directly by using the time-resolved electron paramagnetic resonance (EPR) technique under electrochemical conditions. Supported by the EPR results, the reactivity of N-centered radicals as a mediator in the hydrogen atom transfer (HAT) approach has been discussed. Subsequently, these mechanistic study results have been successfully utilized in the discovery of an unactivated C(sp3)-H arylation reaction. The kinetic experiments have revealed the rate-determined step is the anodic oxidation of sulfonamides.
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Affiliation(s)
- Yichang Liu
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
| | - Biyin Shi
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
| | - Zhao Liu
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
| | - Renfei Gao
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
| | - Cunlong Huang
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
| | - Hesham Alhumade
- Department of Chemical and Materials Engineering, Center of Research Excellence in Renewable Energy and Power Ststems, King Abdulzaziz University, Jeddah 21589, Saudi Arabia
| | - Shengchun Wang
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
| | - Xiaotian Qi
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
| | - Aiwen Lei
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China.,Department of Chemical and Materials Engineering, Abdulzaziz University, Jeddah 21589, Saudi Arabia
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35
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Rieder S, Meléndez C, Dénès F, Jangra H, Mulliri K, Zipse H, Renaud P. Radical chain monoalkylation of pyridines. Chem Sci 2021; 12:15362-15373. [PMID: 34976357 PMCID: PMC8635225 DOI: 10.1039/d1sc02748d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 10/21/2021] [Indexed: 12/27/2022] Open
Abstract
The monoalkylation of N-methoxypyridinium salts with alkyl radicals generated from alkenes (via hydroboration with catecholborane), alkyl iodides (via iodine atom transfer) and xanthates is reported. The reaction proceeds under neutral conditions since no acid is needed to activate the heterocycle and no external oxidant is required. A rate constant for the addition of a primary radical to N-methoxylepidinium >107 M-1 s-1 was experimentally determined. This rate constant is more than one order of magnitude larger than the one measured for the addition of primary alkyl radicals to protonated lepidine demonstrating the remarkable reactivity of methoxypyridinium salts towards radicals. The reaction has been used for the preparation of unique pyridinylated terpenoids and was extended to a three-component carbopyridinylation of electron-rich alkenes including enol esters, enol ethers and enamides.
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Affiliation(s)
- Samuel Rieder
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Camilo Meléndez
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Fabrice Dénès
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Harish Jangra
- Department of Chemistry, LMU München Butenandtstrasse 5-13 81377 München Germany
| | - Kleni Mulliri
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Hendrik Zipse
- Department of Chemistry, LMU München Butenandtstrasse 5-13 81377 München Germany
| | - Philippe Renaud
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
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36
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Reyes JM, Tumaneng JVM, Yu GU. Facile Grignard Reaction Demonstration Using Molecular Sieved Dried Solvent. ACS CHEMICAL HEALTH & SAFETY 2021. [DOI: 10.1021/acs.chas.1c00015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jude M. Reyes
- Department of Chemistry, School of Science and Engineering, Ateneo de Manila University, Quezon City 1108, Philippines
| | - John Vincent M. Tumaneng
- Department of Chemistry, School of Science and Engineering, Ateneo de Manila University, Quezon City 1108, Philippines
| | - Gilbert U. Yu
- Department of Chemistry, School of Science and Engineering, Ateneo de Manila University, Quezon City 1108, Philippines
- Philippine Institute of Pure and Applied Chemistry, Loyola Heights, Katipunan, Quezon City 1800, Philippines
- Chemistry Department, De La Salle University, William Hall 502, 2401 Taft Avenue, Manila 0922, Philippines
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37
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Li J, Huang CY, Han JT, Li CJ. Development of a Quinolinium/Cobaloxime Dual Photocatalytic System for Oxidative C–C Cross-Couplings via H2 Release. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04073] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jianbin Li
- Department of Chemistry, FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Chia-Yu Huang
- Department of Chemistry, FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Jing-Tan Han
- Department of Chemistry, FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry, FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
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38
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Sarmah BK, Konwar M, Das A. Copper-Catalyzed Oxidative Dehydrogenative Reaction of Quinoline- N-Oxides with Donor-Acceptor Cyclopropanes: Installation of a Tertiary Alkyl Motif at C2 Position. Org Lett 2021; 23:8390-8395. [PMID: 34633204 DOI: 10.1021/acs.orglett.1c03115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A copper-catalyzed oxidative dehydrogenative reaction of quinoline N-oxides with donor-acceptor cyclopropanes has been demonstrated to construct C2-alkylated quinolines containing a γ-keto diester motif. The use of molecular oxygen as an oxidant, excellent site-selectivity, and good functional group tolerance are the important features in this process. The preliminary mechanistic studies demonstrate that the catalyst plays a dual role as a Lewis acid and a redox catalyst.
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Affiliation(s)
- Bikash Kumar Sarmah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Monuranjan Konwar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Animesh Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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39
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Jiang X, Du X, Chen K, Han H, Xu D, Zhu B, Jiang L, Fang L, Yu C. Metal-free C3 α-aminoalkylation of quinoxalin-2(1H)-ones with amines. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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40
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Li Y, Liu H, Huang Z, Wang H, Yu Z. Palladium-catalyzed cross-dehydrogenative-coupling of nitro-substituted internal alkenes with terminal alkenes. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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41
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Byun Y, Moon J, An W, Mishra NK, Kim HS, Ghosh P, Kim IS. Transition-Metal-Free Alkylation and Acylation of Benzoxazinones with 1,4-Dihydropyridines. J Org Chem 2021; 86:12247-12256. [PMID: 34406002 DOI: 10.1021/acs.joc.1c01558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The direct functionalization of N-heterocycles is a vital transformation for the development of pharmaceuticals, functional materials, and other chemical entities. Herein, the transition-metal-free alkylation and acylation of C(sp2)-H bonds in biologically relevant 2-benzoxazinones with 1,4-dihydropyridines as readily accessible radical surrogates is described. Excellent functional group compatibility and a broad substrate scope were attained. Gram-scale reaction and transformations of the synthesized adducts via Suzuki coupling with heteroaryl boronic acids demonstrated the synthetic potential of the developed protocol.
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Affiliation(s)
- Youjung Byun
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Junghyea Moon
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Won An
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | | | - Hyung Sik Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Prithwish Ghosh
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - In Su Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
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42
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Li Z, Wu L, Guo J, Shao Y, Song Y, Ding Y, Zhu L, Yao X. Light‐Promoted Minisci Coupling Reaction of Ethers and Aza Aromatics Catalyzed by Au/TiO
2
Heterogeneous Photocatalyst. ChemCatChem 2021. [DOI: 10.1002/cctc.202100298] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhanchong Li
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Liangying Wu
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Jiabao Guo
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Yifei Shao
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Yang Song
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Yuzhou Ding
- Department of Chemistry School of Pharmacy Nanjing Medical University Nanjing 211166 P. R. China
| | - Li Zhu
- Department of Chemistry School of Pharmacy Nanjing Medical University Nanjing 211166 P. R. China
| | - Xiaoquan Yao
- Department of Applied Chemistry College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
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43
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Huang J, Chen Z, Wu J. Recent Progress in Methyl-Radical-Mediated Methylation or Demethylation Reactions. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02010] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jiapian Huang
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry & Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, P. R. China
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Zhiyuan Chen
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry & Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, P. R. China
| | - Jie Wu
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
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44
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Liu H, Yu JT, Pan C. Diacyl peroxides: practical reagents as aryl and alkyl radical sources. Chem Commun (Camb) 2021; 57:6707-6724. [PMID: 34137395 DOI: 10.1039/d1cc02322e] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Diacyl peroxides, which can be easily synthesized from corresponding carboxylic acids, are commonly utilized as radical initiators and one electron oxidants. Under thermal, transition-metal catalysis or irradiation conditions the cleavage of relatively weak O-O bonds would occur followed by CO2 extrusion to generate the corresponding aryl or alkyl radicals. Thus, diacyl peroxides can be employed as ideal arylating and alkylating reagents in organic synthesis, including C-H/N-H arylation/alkylation, aryl/alkyl radical addition to unsaturated bonds, hetero arylation/alkylation, eliminative arylation/alkylation, perfluoroalkylation etc. Moreover, these arylation/alkylation protocols have been successfully utilized in the synthesis and late-stage functionalization of natural products as well as bioactive molecules. In this review, recent advances on arylation and alkylation using diacyl peroxides as aryl and alkyl radical sources are summarized and discussed.
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Affiliation(s)
- Han Liu
- School of Petrochemical Engineering, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou 213164, P. R. China.
| | - Jin-Tao Yu
- School of Petrochemical Engineering, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou 213164, P. R. China.
| | - Changduo Pan
- School of Petrochemical Engineering, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou 213164, P. R. China. and School of Chemistry & Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.
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45
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Ikeda Y, Mandai T, Yonekura K, Shirakawa E. Alkylation of Heteroaryl Chlorides through Homolytic Aromatic Substitution by Alkyl Radicals Derived from Alkyl Formates. CHEM LETT 2021. [DOI: 10.1246/cl.210015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuko Ikeda
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Tomoya Mandai
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Kyohei Yonekura
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Eiji Shirakawa
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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46
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Ghosh P, Chhetri G, Perl E, Das S. [Bis(trifluoroacetoxy)iodo]benzene Mediated C‐3 Selenylation of Pyrido[1,2‐
a
]Pyrimidin‐4‐Ones Under Ambient Conditions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001426] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Prasanjit Ghosh
- Department of Chemistry University of North Bengal India Darjeeling 734013
| | - Gautam Chhetri
- Department of Chemistry University of North Bengal India Darjeeling 734013
| | - Eliyahu Perl
- University of Cincinnati College of Medicine USA
| | - Sajal Das
- Department of Chemistry University of North Bengal India Darjeeling 734013
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47
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Proctor RJ, Chuentragool P, Colgan AC, Phipps RJ. Hydrogen Atom Transfer-Driven Enantioselective Minisci Reaction of Amides. J Am Chem Soc 2021; 143:4928-4934. [PMID: 33780237 PMCID: PMC8033566 DOI: 10.1021/jacs.1c01556] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Indexed: 01/20/2023]
Abstract
Minisci-type reactions constitute one of the most powerful methods for building up complexity around basic heteroarenes. The most desirable variants involve formal oxidative coupling of a C-H bond on each partner, leading back to the simplest possible starting materials. We herein disclose a method that enables such a coupling of linear amides and heteroarenes with full control of enantioselectivity at the newly formed stereocenter as well as site selectivity on both the heteroarene and the amide. This is achieved by the use of a chiral phosphoric acid catalyst in conjunction with diacetyl as a combined hydrogen atom transfer reagent and oxidant. Diacetyl is directly photoexcitable, and thus, no extraneous photocatalyst is required: an added feature that contributes to the simplicity and practicality of the protocol.
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Affiliation(s)
- Rupert
S. J. Proctor
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Padon Chuentragool
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Avene C. Colgan
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Robert J. Phipps
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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48
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Lee W, Jung S, Kim M, Hong S. Site-Selective Direct C–H Pyridylation of Unactivated Alkanes by Triplet Excited Anthraquinone. J Am Chem Soc 2021; 143:3003-3012. [DOI: 10.1021/jacs.1c00549] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wooseok Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Sungwoo Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Minseok Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Sungwoo Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
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49
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50
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Shen J, Zhang Y, Yu Y, Wang M. Metal-free visible-light-induced photoredox-catalyzed intermolecular pyridylation/phosphinoylation of alkenes. Org Chem Front 2021. [DOI: 10.1039/d0qo01218a] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A visible-light-induced and photoredox-catalyzed intermolecular pyridylation/phosphinoylation of alkenes using 4-cyanopyridine and diphenylphosphine oxide under mild metal-free conditions has been reported.
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Affiliation(s)
- Jiaxuan Shen
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering Henan Normal University
- Xinxiang
| | - Yipin Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering Henan Normal University
- Xinxiang
| | - Yanjiang Yu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering Henan Normal University
- Xinxiang
| | - Manman Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering Henan Normal University
- Xinxiang
| |
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