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Fu K, Yang X, Yu Z, Song L, Shi L. Revealing the nature of covalently tethered distonic radical anions in the generation of heteroatom-centered radicals: evidence for the polarity-matching PCET pathway. Chem Sci 2024; 15:12398-12409. [PMID: 39118625 PMCID: PMC11304808 DOI: 10.1039/d4sc02602k] [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: 04/19/2024] [Accepted: 06/27/2024] [Indexed: 08/10/2024] Open
Abstract
Recognition of the intermediacy and regulation of reactivity patterns of radical intermediates in radical chemistry have profound impacts on harnessing and developing the full potential of open-shell species in synthetic settings. In this work, the possibility of in situ formation of O/N-X intermediates from Brønsted base covalently tethered carbonyl hypohalites (BCTCs) for the generation of heteroatom-centered radicals has certainly been excluded by NMR experiments and density functional theory calculations. Instead, the spectroscopic analyses reveal that the BCTCs serve as precursors of tether-tunable distonic radical anions (TDRAs) which have been unequivocally substantiated to be involved in the direct cleavage of O/N-H bonds to generate the corresponding heteroatom-centered radicals. Meanwhile, a deep insight into the properties and reactivities of the resulting TDRAs indicates that the introduction of a tethered Brønsted base on the parent open-shell species reinforces their stabilities and leads to a reversal of electrophilicity. Moreover, the dual descriptor values and electrophilicity indices are calculated based on eleven reported radical reactions involving various electrophilic/nucleophilic radical species, further confirming their validity in the prediction of the polar effect and the polarity-matching consistency between nucleophilic TDRAs and protic O/N-H bonds. The additional halogen-free experiments mediated by the combination of phthaloyl peroxide and TEMPO also prove the feasibility of the TDRA-assisted philicity-regulation approach. Lastly, detailed intrinsic bond orbital (IBO) and Hirschfeld spin population analyses are employed to elucidate that the H-atom abstraction processes are the polarity-matching proton-coupled electron transfer (PCET) pathways, with a degree of oxidative asynchronicity.
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Affiliation(s)
- Kang Fu
- School of Chemistry and Chemical Engineering, School of Science(shenzhen), Harbin Institute of Technology Harbin 150001 China
| | - Xihui Yang
- School of Chemistry and Chemical Engineering, School of Science(shenzhen), Harbin Institute of Technology Harbin 150001 China
| | - Zhiyou Yu
- School of Chemistry and Chemical Engineering, School of Science(shenzhen), Harbin Institute of Technology Harbin 150001 China
| | - Lijuan Song
- School of Chemistry and Chemical Engineering, School of Science(shenzhen), Harbin Institute of Technology Harbin 150001 China
| | - Lei Shi
- School of Chemistry and Chemical Engineering, School of Science(shenzhen), Harbin Institute of Technology Harbin 150001 China
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2
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Mairhofer C, Naderer D, Waser M. Tetrabutylammonium iodide-catalyzed oxidative α-azidation of β-ketocarbonyl compounds using sodium azide. Beilstein J Org Chem 2024; 20:1510-1517. [PMID: 38978746 PMCID: PMC11228824 DOI: 10.3762/bjoc.20.135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 06/28/2024] [Indexed: 07/10/2024] Open
Abstract
We herein report the oxidative α-azidation of carbonyl compounds by using NaN3 in the presence of dibenzoyl peroxide catalyzed by tetrabutylammonium iodide (TBAI). By utilizing these readily available bulk chemicals a variety of cyclic β-ketocarbonyl derivatives can be efficiently α-azidated under operationally simple conditions. Control experiments support a mechanistic scenario involving in situ formation of an ammonium hypoiodite species which first facilitates the α-iodination of the pronucleophile, followed by a phase-transfer-catalyzed nucleophilic substitution by the azide. Furthermore, we also show that an analogous α-nitration by using NaNO2 under otherwise identical conditions is possible as well.
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Affiliation(s)
- Christopher Mairhofer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
| | - David Naderer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
| | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
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3
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Shamnad A, Nayak KH, Babu BP. Metal-Free Bisamidation of N-Tosylhydrazones with Carboxylic Acids Promoted by Tetrabutylammonium Iodide and tert-Butyl Hydroperoxide. J Org Chem 2024; 89:6545-6554. [PMID: 38630068 DOI: 10.1021/acs.joc.4c00156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2024]
Abstract
A versatile reaction between N-tosylhydrazones and carboxylic acids to access bisamides is reported. This metal-free, room-temperature reaction was catalyzed by TBAI, while TBHP served as the oxidant. Broad substrate scope and good functional group tolerance are the key features of the strategy. Subsequent intramolecular N-arylation of suitably substituted bisamides readily afforded functionalized 3-indazolones.
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Affiliation(s)
- Ali Shamnad
- Department of Chemistry, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore 575025, Karnataka, India
| | - Kalinga H Nayak
- Department of Chemistry, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore 575025, Karnataka, India
| | - Beneesh P Babu
- Department of Chemistry, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore 575025, Karnataka, India
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4
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Murata R, Shitamichi K, Hiramatsu M, Matsubara S, Uraguchi D, Asano K. trans-Cyclooctenes as Scavengers of Bromine Involved in Catalytic Bromination. Chemistry 2024; 30:e202303399. [PMID: 38117956 DOI: 10.1002/chem.202303399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Indexed: 12/22/2023]
Abstract
Scavengers that capture reactive chemical substances are used to prevent the decomposition of materials. However, in the field of catalysis, the development of scavengers that inhibit background pathways has attracted little attention, although the concept will open up an otherwise inaccessible reaction space. In catalytic bromination, fast non-catalyzed background reactions disturb the catalytic control of the selectivity, even when using N-bromoamide reagents, which have a milder reactivity than bromine (Br2 ). Here, we developed a trans-cyclooctene (TCO) bearing a 2-pyridylethyl group to efficiently retard background reactions by capturing Br2 in bromocyclization using N-bromosuccinimide. The use of less than a stoichiometric amount of the TCO was sufficient to inhibit non-catalyzed reactions, and mechanistic studies using the TCO revealed that in situ-generated Br2 provides non-catalyzed reaction pathways based on a chain mechanism. The TCO is useful as an additive for improving enantioselectivity and regioselectivity in catalytic reactions. Cooperative systems using the TCO with selective catalysts offer an alternative strategy for optimizing catalyst-controlled selectivity during bromination. Moreover, it also served as an indicator of Br2 involved in catalytic reaction pathways; thus, the TCO was useful as a probe for mechanistic investigations into the involvement of Br2 in bromination reactions of interest.
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Affiliation(s)
- Ryuichi Murata
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
| | - Kenta Shitamichi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
| | - Masatsugu Hiramatsu
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
| | - Daisuke Uraguchi
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan
- List Sustainable Digital Transformation Catalyst Collaboration Research Platform, Institute for Chemical Reaction Design and Discovery (ICReDD List-PF), Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan
| | - Keisuke Asano
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan
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5
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Mairhofer C, Waser M. Dibenzoylperoxide as a Versatile Oxidant for Oxidative Azidations of Phenols Using Quaternary Ammonium Iodides or Bromides. Adv Synth Catal 2023; 365:2757-2762. [DOI: 10.1002/adsc.202300405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Indexed: 09/02/2023]
Abstract
AbstractDibenzoylperoxide emerged as a versatile oxidant for quaternary ammonium iodide or bromide‐catalyzed reactions of phenol derivatives with NaN3. While the use of iodides allowed for efficient benzylic azidations under these oxidative conditions, the use of bromides allowed for dearomative azidations instead. Both approaches have been successfully applied to different phenol derivatives and a first proof‐of‐concept for an enantioselective variant using chiral quat. ammonium bromides has been obtained as well.
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Affiliation(s)
- Christopher Mairhofer
- Institute of Organic Chemistry Johannes Kepler University Linz Altenbergerstr. 69 4040 Linz Austria
| | - Mario Waser
- Institute of Organic Chemistry Johannes Kepler University Linz Altenbergerstr. 69 4040 Linz Austria
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6
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Liu FL, Mei L, Wang LT, Zhou Y, Tang K, Li T, Yi R, Wei WT. Radical bicyclization of 1,6-enynes with sulfonyl hydrazides by the use of TBAI/TBHP in the aqueous phase. Chem Commun (Camb) 2023; 59:6391-6394. [PMID: 37157973 DOI: 10.1039/d3cc01102j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A novel 5-exo-dig/6-endo-trig bicyclization of 1,6-enynes with sulfonyl hydrazides in the aqueous phase using the cheap and available tetrabutylammonium iodide (TBAI)-tert-butyl hydroperoxide (TBHP) combined system is reported. The resulting reaction of diverse nitrogen- and oxygen-polyheterocycles displays high chemical selectivity, high step-economy, and a moderate substrate scope. Moreover, iodosulfonylation can be realized by modulating the structure of the 1,6-enynes.
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Affiliation(s)
- Fa-Liang Liu
- School of Materials Science and Chemical Engineering, Institute of Mass Spectrometry, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Lan Mei
- School of Materials Science and Chemical Engineering, Institute of Mass Spectrometry, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Ling-Tao Wang
- School of Materials Science and Chemical Engineering, Institute of Mass Spectrometry, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Yu Zhou
- School of Materials Science and Chemical Engineering, Institute of Mass Spectrometry, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Keqi Tang
- School of Materials Science and Chemical Engineering, Institute of Mass Spectrometry, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Ting Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan, 473061, China.
| | - Rongnan Yi
- Criminal Technology Department, Hunan Police Academy, Changsha, Hunan, 410138, China
| | - Wen-Ting Wei
- School of Materials Science and Chemical Engineering, Institute of Mass Spectrometry, Ningbo University, Ningbo, Zhejiang, 315211, China.
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7
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zheng H, Chen X, Zuo J, Ye J, Zhao C, Xu J. Syntheses of spiro-oxindoles via KI/oxone-mediated oxidation/cyclization of homotryptamine and homotryptophol derivatives. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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8
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Qin Y, Zhang Z, Ye X, Tan CH. Ion Pair Catalyst - Pentanidinium. CHEM REC 2023:e202200304. [PMID: 36762723 DOI: 10.1002/tcr.202200304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 01/27/2023] [Indexed: 02/11/2023]
Abstract
In this account, we further describe our already developed N-sp2 hybrid guanidinium as an efficient phase-transfer catalyst and ion pair catalysis based on N-sp2 hybrid pentanidinium and its application in some new reactions. The sp3 hybrid quaternary ammonium salt has a tetrahedral structure, which means that three sides of it can be effectively steric, allowing the remaining side to be close to the substrate. However, the sp2 hybrid ammonium salt allows the substrate to form ion pairs from both directions respectively, so it is a greater challenge to control the stereoselectivity of the reaction. Van der Waals forces, such as hydrogen bonds and π - π ${\pi -\pi }$ interactions, have been used to make electrophiles approach from a certain direction, leading to a higher enantioselectivity. Based on the above idea, we designed an N-sp2 hybrid phase-transfer catalyst, pentanidinium. Pentanidinium has five conjugated nitrogen atoms, one of which has a formal positive charge, which is necessary for it to become an ion pair catalyst. We have confirmed that pentanidinium can catalyze α-hydroxylation of 3-substituted-2-oxindoles, Michael addition of 3-alkyloxindoles with vinyl sulfone, and alkylation reactions of sulfenate anions and dihydrocoumarins, desymmetrization of pro-chiral sulfinate to afford enantioenriched sulfinate esters. Pentanidinium with side chain structure changes can also be catalyzed efficiently with enantioconvergent halogenophilic nucleophilic substitution, including azidation and thioesterification. In the reaction catalyzed by pentanidinium, it always attracts us with the advantages of low catalytic load and good enantioselectivity.
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Affiliation(s)
- Yimin Qin
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, Zhejiang Province, P.R. China
| | - Zhenqiang Zhang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, Zhejiang Province, P.R. China
| | - Xinyi Ye
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, Zhejiang Province, P.R. China
| | - Choon-Hong Tan
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
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9
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Zheng M, Huang C, Yan JZ, Xie SL, Ke SJ, Xia HD, Duan YN. In Situ Hypoiodite-Catalyzed Oxidative Rearrangement of Chalcones: Scope and Mechanistic Investigation. J Org Chem 2023; 88:1504-1514. [PMID: 36660775 DOI: 10.1021/acs.joc.2c02291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
It is highly desirable to avoid using rare or toxic metals for oxidative reactions in the synthesis of pharmaceuticals and fine chemicals. Hypervalent iodine compounds are environmentally benign alternatives, but their catalytic use has been quite limited. Herein, the protocol for in situ hypoiodite-catalyzed oxidative rearrangement of chalcones is first realized under mild and metal-free conditions, which provided a nontoxic, environmental-benign, and catalytic alternative to the thallium-based protocol. Also, the applicability and effectiveness of this catalytic protocol got well demonstrated via gram-scale synthesis and product derivatization. What is more, control and NMR tracking experiments were performed to figure out the possible catalytic species and intermediates.
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Affiliation(s)
- Meiqiong Zheng
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, P. R. China.,Shantou University, Shantou 515031, P. R. China
| | - Chao Huang
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, P. R. China
| | - Jian-Zhong Yan
- Industry & Technology Service Center, Shantou Hi-tech Industrial Development Zone, Shantou 515031, P. R. China
| | - Shu-Li Xie
- Shantou University, Shantou 515031, P. R. China
| | - Shao-Jia Ke
- Shantou Food Inspection and Testing Center, Shantou 515031, P. R. China
| | - Hai-Dong Xia
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, P. R. China
| | - Ya-Nan Duan
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, P. R. China
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10
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Odagi M, Mori I, Sugimoto K, Nagasawa K. Enantioselective Oxidative Enolate Coupling of Oxindoles Catalyzed by Chiral Guanidinium Hypoiodite. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Minami Odagi
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Io Mori
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Kota Sugimoto
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Kazuo Nagasawa
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
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11
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Sugimoto K, Mori I, Kato T, Yasui K, Xu B, Tan CH, Odagi M, Nagasawa K. Guanidinium Hypoiodite-Catalyzed Intramolecular Oxidative Coupling Reaction of Oxindoles with β-Dicarbonyls. J Org Chem 2023. [PMID: 36702628 DOI: 10.1021/acs.joc.2c02500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Spiro[indoline-3,4'-piperidine] is a fundamental motif present in various biologically active compounds. Here, we report an intramolecular oxidative coupling reaction of oxindoles with β-dicarbonyls in the presence of a guanidinium hypoiodite catalyst, providing spiro-coupling products in moderate to excellent yields. Furthermore, a chiral hypoiodite catalyst derived from the chiral guanidinium organocatalyst is effective for the challenging asymmetric carbon-carbon bond-forming reaction, affording optically active spiro[indoline-3,4'-piperidines].
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Affiliation(s)
- Kota Sugimoto
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Io Mori
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Takanari Kato
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Koji Yasui
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Ban Xu
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Choon Hong Tan
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Minami Odagi
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Kazuo Nagasawa
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
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12
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Ji J, Zeng C, Wu P, Wang Y, Chen X, Yan X. Improved Whole-Cell Biocatalyst for the Synthesis of Vitamin E Precursor 2,3,5-Trimethylhydroquinone. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:1162-1169. [PMID: 36621524 DOI: 10.1021/acs.jafc.2c07768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
2,3,5-Trimethylhydroquinone (2,3,5-TMHQ) is the key precursor in the synthesis of vitamin E. It is still a major challenge to produce 2,3,5-TMHQ under mild reaction conditions by chemical methods. The monooxygenase system MpdAB can specifically catalyze the conversion of 2,3,6-trimethylphenol (2,3,6-TMP) to 2,3,5-TMHQ. However, the weak catalytic capacity of wild-type MpdA and the cytotoxicity of the substrate limited the production efficiency of 2,3,5-TMHQ. Here, homologous modeling and saturation mutation were performed to increase the catalytic activity of MpdA. Two variants, L128A and L128K, with higher activity toward 2,3,6-TMP (1.86-1.87-fold) were obtained. On the other hand, an evolved strain B5-4M-evolved with enhanced resistance to 2,3,6-TMP (8.15-fold higher for 1000 μM 2,3,6-TMP) was obtained through adaptive laboratory evolution. Subsequently, a 5.29-fold (or 4.87-fold) improvement in 2,3,5-TMHQ production was achieved by a strain B5-4M-evolved harboring L128K (or L128A) and MpdB, in comparison with that of the wild type (strain B5-4M expressing MpdAB). This study provides better genetic resources for producing 2,3,5-TMHQ and proves that the synthesis efficiency of 2,3,5-TMHQ can be improved through enzyme modification and adaptive laboratory evolution.
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Affiliation(s)
- Junbin Ji
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, People's Republic of China
- Nanjing Key Laboratory of Quality and Safety of Agricultural Products, College of Food Science, Nanjing XiaoZhuang University, Nanjing 211171, Jiangsu, People's Republic of China
| | - Caiting Zeng
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, People's Republic of China
| | - Panpan Wu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, People's Republic of China
| | - Yuying Wang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, People's Republic of China
| | - Xueting Chen
- Shanghai Fisheries Research Institute, Shanghai Fisheries Technical Extension Station, Shanghai 200433, People's Republic of China
| | - Xin Yan
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, People's Republic of China
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13
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Waser M, Winter M, Mairhofer C. (Thio)urea containing chiral ammonium salt catalysts. CHEM REC 2022:e202200198. [PMID: 36175162 DOI: 10.1002/tcr.202200198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 08/25/2022] [Indexed: 11/08/2022]
Abstract
(Thio)-urea-containing bifunctional quaternary ammonium salts emerged as powerful non-covalently interacting organocatalysts over the course of the last decade. The most commonly employed catalysts in this field are either based on Cinchona alkaloids, α-amino acids, or trans-cyclohexane-1,2-diamine. Our group has been heavily engaged in the design and use of such catalysts, i. e. trans-cyclohexane-1,2-diamine-based ones for around 10 years now, and it is therefore the intention of this short personal account to provide an overview of the, at least in our opinion, most significant and pioneering achievements in this field by looking on catalyst design and asymmetric method development, with a special focus on our own contributions.
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Affiliation(s)
- Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040, Linz, Austria
| | - Michael Winter
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040, Linz, Austria
| | - Christopher Mairhofer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040, Linz, Austria
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14
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Ralbovsky NM, Smith JP. Process analytical technology and its recent applications for asymmetric synthesis. Talanta 2022; 252:123787. [DOI: 10.1016/j.talanta.2022.123787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 07/25/2022] [Indexed: 11/27/2022]
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15
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Guan Z, Zhong X, Ye Y, Li X, Cong H, Yi H, Zhang H, Huang Z, Lei A. Selective radical cascade (4+2) annulation with olefins towards the synthesis of chroman derivatives via organo-photoredox catalysis. Chem Sci 2022; 13:6316-6321. [PMID: 35733882 PMCID: PMC9159083 DOI: 10.1039/d2sc00903j] [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: 02/12/2022] [Accepted: 04/21/2022] [Indexed: 12/02/2022] Open
Abstract
Due to the importance of chroman frameworks in medicinal chemistry, the development of novel synthetic methods for these structures is gaining increasing interest of chemists. Reported here is a new (4 + 2) radical annulation approach for the construction of these functional six-membered frameworks via photocatalysis. Featuring mild reaction conditions, the protocol allows readily available N-hydroxyphthalimide esters and electron-deficient olefins to be converted into a wide range of valuable chromans in a highly selective manner. Moreover, the present strategy can be used in the late-stage functionalization of natural product derivatives and biologically active compounds, which demonstrated the potential application. This method is complementary to the traditional Diels–Alder [4 + 2] cycloaddition reaction of ortho-quinone methides and electron-rich dienophiles, since electron-deficient dienophiles were smoothly transformed into the desired chromans. We have developed a (4 + 2) radical annulation approach for the synthesis of diverse chromans. This method is complementary to the traditional Diels–Alder [4 + 2] annulation of ortho-quinone methides and electron-rich dienophiles.![]()
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Affiliation(s)
- Zhipeng Guan
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 Hubei People's Republic of China
| | - Xingxing Zhong
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 Hubei People's Republic of China
| | - Yayu Ye
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 Hubei People's Republic of China
| | - Xiangwei Li
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 Hubei People's Republic of China
| | - Hengjiang Cong
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 Hubei People's Republic of China
| | - Hong Yi
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 Hubei People's Republic of China
| | - Heng Zhang
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 Hubei People's Republic of China
| | - Zhiliang Huang
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 Hubei People's Republic of China
| | - Aiwen Lei
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 Hubei People's Republic of China
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16
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Röser K, Scheucher A, Mairhofer C, Bechmann M, Waser M. Oxidative decarboxylative ammonium hypoiodite-catalysed dihydrobenzofuran synthesis. Org Biomol Chem 2022; 20:3273-3276. [PMID: 35363244 DOI: 10.1039/d2ob00463a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The catalytic use of quaternary ammonium iodides under oxidative conditions allows for the direct conversion of readily available β-ketolactones into dihydrobenzofurans via a decarboxylative oxidative cycloetherification sequence facilitated by an in situ formed ammonium hypoiodite species.
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Affiliation(s)
- Katharina Röser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, Linz 4040, Austria.
| | - Anna Scheucher
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, Linz 4040, Austria.
| | - Christopher Mairhofer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, Linz 4040, Austria.
| | - Matthias Bechmann
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, Linz 4040, Austria.
| | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, Linz 4040, Austria.
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17
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Tanaka H, Ukegawa N, Uyanik M, Ishihara K. Hypoiodite-Catalyzed Oxidative Umpolung of Indoles for Enantioselective Dearomatization. J Am Chem Soc 2022; 144:5756-5761. [PMID: 35319875 PMCID: PMC8991020 DOI: 10.1021/jacs.2c01852] [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] [Indexed: 01/05/2023]
Abstract
![]()
Here we report the
oxidative umpolung of 2,3-disubstituted indoles
toward enantioselective dearomative aza-spirocyclization to give the
corresponding spiroindolenines using chiral quaternary ammonium hypoiodite
catalysis. Mechanistic studies revealed the umpolung reactivity of
C3 of indoles by iodination of the indole nitrogen atom. Moreover,
the introduction of pyrazole as an electron-withdrawing auxiliary
group at C2 suppressed a competitive dissociative racemic pathway,
and enantioselective spirocyclization proceeded to give not only spiropyrrolidines
but also four-membered spiroazetidines that are otherwise difficult
to access.
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Affiliation(s)
- Hiroki Tanaka
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Naoya Ukegawa
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Muhammet Uyanik
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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18
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Nakashima K, Minai A, Okuaki Y, Matsushima Y, Hirashima SI, Miura T. Organocatalytic one-pot asymmetric synthesis of 6-trifluoromethyl-substituted 7,8-dihydrochromen-6-ol. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153733] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Wang D, Zhang W, Lu X, Zhou H, Zhong F. Cinchona Alkaloid Derived Iodide Catalyzed Enantioselective Oxidative α-Amination of Carbonyl Compounds toward the Construction of Spiroindolyloxindole. Org Lett 2022; 24:842-847. [PMID: 35025513 DOI: 10.1021/acs.orglett.1c04118] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Novel cinchona alkaloid derived iodide catalysts were developed for the enantioselective oxidative α-amination of 2-oxindoles, providing various functionalized spiropyrrolidine oxindoles in high yields and with good enantioselectivities. This iodide/ROOH catalytic system features a one-step synthesis of a catalyst with multiple functionalities, ease of operation, and good scalability, thereby enriching the repertoire of iodide catalysis for enantioselective oxidative coupling reactions.
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Affiliation(s)
- Dangui Wang
- School of Pharmacy, Weifang Medical University, Weifang 261053, People's Republic of China.,Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Wentao Zhang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Xunbo Lu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Hongwei Zhou
- College of Biological, Chemical Science and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing 314001, People's Republic of China
| | - Fangrui Zhong
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
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20
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Yang Y, Liu L, Li K, Zha Z, Sun Q, Wang Z. Iodine-mediated oxythiolation of o-vinylanilides with disulfides for the synthesis of benzoxazines. RSC Adv 2022; 12:7347-7351. [PMID: 35424675 PMCID: PMC8982212 DOI: 10.1039/d2ra01078j] [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: 02/18/2022] [Accepted: 02/23/2022] [Indexed: 11/21/2022] Open
Abstract
An efficient iodine-mediated oxythiolation of o-vinylanilides with disulfides was developed. By virtue of this method, a series of thio-tethered benzoxazine derivatives were synthesized in good to excellent yields. The reaction features high yields, is metal-free, and has a wide substrate scope. An efficient iodine-mediated oxythiolation of o-vinylanilides with disulfides was developed. The reaction features high yields, is metal-free, and has a wide substrate scope.![]()
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Affiliation(s)
- Yu Yang
- School of Chemistry and Chemical Engineering, Hefei Normal University, Hefei, 230601, China
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Liyan Liu
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Kuiliang Li
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Zhenggen Zha
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Qi Sun
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Zhiyong Wang
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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21
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Uyanik M, Nagata D, Ishihara K. Hypoiodite-catalysed oxidative homocoupling of arenols and tandem oxidation/cross-coupling of hydroquinones with arenes. Chem Commun (Camb) 2021; 57:11625-11628. [PMID: 34673855 DOI: 10.1039/d1cc05171g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We report the hypoiodite-catalyzed oxidative C-C homocoupling of arenols to biarenols or biquinones using aqueous hydrogen peroxide as an oxidant. In addition, by combining hypoiodite catalysis and lipophilic Lewis acid-assisted Brønsted acid catalysis under aqueous conditions, we achieved a tandem oxidation/cross-coupling reaction of hydroquinones with electron-rich arenes. These results highlight the substantial scope of hypoiodite/acid co-catalysis for use in oxidative coupling reactions.
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Affiliation(s)
- Muhammet Uyanik
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan.
| | - Dai Nagata
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan.
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan.
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22
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Xiao BX, Jiang B, Yan RJ, Zhu JX, Xie K, Gao XY, Ouyang Q, Du W, Chen YC. A Palladium Complex as an Asymmetric π-Lewis Base Catalyst for Activating 1,3-Dienes. J Am Chem Soc 2021; 143:4809-4816. [PMID: 33730847 DOI: 10.1021/jacs.1c01420] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Here we report that palladium(0) complexes can coordinate in a η2 fashion to 1,3-dienes and significantly raise the energy of their highest occupied molecular orbital (HOMO) by donating the electrons from the d-orbitals to the empty antibonding molecular orbitals of double bonds (π*) via back-bonding. Thus, the uncoordinated double bond, as a more reactive partner on the basis of the principle of vinylogy, can directly attack imines, furnishing a formal hydrodienylation reaction enantioselectively. A chemoselective cascade vinylogous addition/allylic alkylation difunctionalization process between 1,3-dienes and imines with a nucleophilic group is also compatible, by trapping in situ formed π-allylpalladium species after initial ene addition. This π-Lewis base catalytic mode, featuring simple η2coordination, vinylogous activation, and compatibility with both conjugated neutral polyenes and electron-deficient polyenes, is elucidated by control experiments and density functional theory (DFT) calculations.
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Affiliation(s)
- Ben-Xian Xiao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, People's Republic of China
| | - Bo Jiang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, People's Republic of China
| | - Ru-Jie Yan
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, People's Republic of China
| | - Jian-Xiang Zhu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, People's Republic of China
| | - Ke Xie
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, People's Republic of China
| | - Xin-Yue Gao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, People's Republic of China
| | - Qin Ouyang
- College of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, People's Republic of China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, People's Republic of China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, People's Republic of China.,College of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, People's Republic of China
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23
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Ghosh P, Ganguly B, Das S. NaI/KI/NH 4I and TBHP as powerful oxidation systems: use in the formation of various chemical bonds. Org Biomol Chem 2021; 19:2146-2167. [PMID: 33629084 DOI: 10.1039/d0ob02169e] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In modern organic synthesis, the execution of reactions in the absence of expensive transition metals has received significant attention from the view-point of green chemistry and sustainable development. As a consequence, the combination of MI-TBHP as an oxidation system (M = Na, K, NH4) has opened a new avenue with significant impact for the succinct synthesis of complex heterocycle molecules via the construction of various chemical bonds [C-X (X = C, N, S, O), N-X (X = N, P) and S-N]. This comprehensive review article delineates the progress of recent developments in this emerging area, with an in-depth discussion on the substrate scope, limitations and proper mechanistic underpinnings. We hope this review will highlight the great potential of this MI-TBHP as a powerful oxidation system and inspire researchers to conduct further endeavors in this domain.
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Affiliation(s)
- Prasanjit Ghosh
- Department of Chemistry, University of North Bengal, Darjeeling - 734013, India.
| | - Bhaskar Ganguly
- Department of Chemistry, University of North Bengal, Darjeeling - 734013, India.
| | - Sajal Das
- Department of Chemistry, University of North Bengal, Darjeeling - 734013, India.
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24
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Saini P, Sonika, Singh G, Kaur G, Singh J, Singh H. Robust and Versatile Cu(I) metal frameworks as potential catalysts for azide-alkyne cycloaddition reactions: Review. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111432] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Zhang W, Xiang S, Fan W, Jin J, Li Y, Huang D. A three-component iodine-catalyzed oxidative coupling reaction: a heterodifunctionalization of 3-methylindoles. Org Biomol Chem 2021; 19:5794-5799. [PMID: 34109340 DOI: 10.1039/d1ob00730k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A metal-free method for the synthesis of heterodifunctional indole derivatives is developed through TBHP/KI-mediated oxidative coupling. The reaction constructs C-O and C-C bonds in succession with the help of tert-butyl peroxy radicals generated by the TBHP/KI catalytic system, enabling the direct realization of the heterodifunctionalization of indole in one pot. The product of this reaction is a novel heterodifunctional compound. This work might provide a new effective method for the synthesis of polycyclic indole compounds.
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Affiliation(s)
- Wei Zhang
- Fujian Normal University, College of Chemistry and Materials Science, Fuzhou 350007, China. and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Shiqun Xiang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Weibin Fan
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Jiang Jin
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Yinghua Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Deguang Huang
- Fujian Normal University, College of Chemistry and Materials Science, Fuzhou 350007, China. and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
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26
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Uyanik M, Tanaka H, Ishihara K. I
+
/TBHP Catalysis For Tandem Oxidative Cyclization To Indolo[2,3‐
b
]quinolines. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000570] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Muhammet Uyanik
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Hiroki Tanaka
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
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27
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Zhao R, Fu K, Fang Y, Zhou J, Shi L. Site-Specific C(sp 3 )-H Aminations of Imidates and Amidines Enabled by Covalently Tethered Distonic Radical Anions. Angew Chem Int Ed Engl 2020; 59:20682-20690. [PMID: 32706927 DOI: 10.1002/anie.202008806] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/21/2020] [Indexed: 11/11/2022]
Abstract
The utilization of N-centered radicals to synthesize nitrogen-containing compounds has attracted considerable attention recently, due to their powerful reactivities and the concomitant construction of C-N bonds. However, the generation and control of N-centered radicals remain particularly challenging. We report a tethering strategy using SOMO-HOMO-converted distonic radical anions for the site-specific aminations of imidates and amidines with aid of the non-covalent interaction. This reaction features a remarkably broad substrate scope and also enables the late-stage functionalization of bioactive molecules. Furthermore, the reaction mechanism is thoroughly investigated through kinetic studies, Raman spectroscopy, electron paramagnetic resonance spectroscopy, and density functional theory calculations, revealing that the aminations likely involve direct homolytic cleavage of N-H bonds and subsequently controllable 1,5 or 1,6 hydrogen atom transfer.
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Affiliation(s)
- Rong Zhao
- School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Kang Fu
- School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Yuanding Fang
- School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Jia Zhou
- School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Lei Shi
- School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China.,Beijing National Laboratory for Molecular Sciences, Beijing, 100190, China
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28
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Zhu L, Li J, Yang J, Au-Yeung HY. Cross dehydrogenative C-O coupling catalysed by a catenane-coordinated copper(i). Chem Sci 2020; 11:13008-13014. [PMID: 34094485 PMCID: PMC8163234 DOI: 10.1039/d0sc05133k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Catalytic activity of copper(i) complexes supported by phenanthroline-containing catenane ligands towards a new C(sp3)–O dehydrogenative cross-coupling of phenols and bromodicarbonyls is reported. As the phenanthrolines are interlocked by the strong and flexible mechanical bond in the catenane, the active catalyst with an open copper coordination site can be revealed only transiently and the stable, coordinatively saturated Cu(i) pre-catalyst is quickly regenerated after substrate transformation. Compared with a control Cu(i) complex supported by non-interlocked phenanthrolines, the catenane-supported Cu(i) is highly efficient with a broad substrate scope, and can be applied in gram-scale transformations without a significant loss of the catalytic activity. This work demonstrates the advantages of the catenane ligands that provide a dynamic and responsive copper coordination sphere, highlighting the potential of the mechanical bond as a design element in transition metal catalyst development. The use of a catenane-supported copper(i) complex for the cross dehydrogenative C–O coupling of phenols and bromodicarbonyls is described.![]()
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Affiliation(s)
- Lihui Zhu
- Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong P. R. China
| | - Jiasheng Li
- Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong P. R. China
| | - Jun Yang
- Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong P. R. China
| | - Ho Yu Au-Yeung
- Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong P. R. China .,State Key Laboratory of Synthetic Chemistry, The University of Hong Kong Pokfulam Road Hong Kong P. R. China
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29
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Nishiguchi Y, Tomizuka A, Moriyama K. Formal Ring Contraction of Cyclic
N
‐Sulfonamides via C−N Bond Cleavage and α‐Amination by Oxidation of Halides. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001034] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yuna Nishiguchi
- Department of Chemistry Graduate School of Science and Soft Molecular Activation Research Center Chiba University 1-33 Yayoi-cho, Inage-ku Chiba 263-8522 Japan
| | - Akihiko Tomizuka
- Department of Chemistry Graduate School of Science and Soft Molecular Activation Research Center Chiba University 1-33 Yayoi-cho, Inage-ku Chiba 263-8522 Japan
| | - Katsuhiko Moriyama
- Department of Chemistry Graduate School of Science and Soft Molecular Activation Research Center Chiba University 1-33 Yayoi-cho, Inage-ku Chiba 263-8522 Japan
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30
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Uyanik M, Tanaka H, Ishihara K. Hypoiodite-Catalyzed Chemoselective Tandem Oxidation of Homotryptamines to Peroxy- and Epoxytetrahydropyridoindolenines. Org Lett 2020; 22:8049-8054. [PMID: 32996315 DOI: 10.1021/acs.orglett.0c03001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We developed the hypoiodite-catalyzed tandem dearomative peroxycyclization of homotryptamine derivatives to peroxytetrahydropyridoindolenines under mild conditions. During the course of a mechanistic study, we found that a tandem oxidative cyclization/epoxidation as an unexpected reaction proceeded in the presence of TEMPO as an additive. Intramolecular oxidative aminocyclization of homotryptamines at the C-2 position would give tetrahydropyridoindole, a common intermediate for both reactions. Control experiments suggested that while oxidative coupling with TBHP at the C-3 position might afford peroxyindolenines, a preferential electrophilic addition of TEMPO+, which might be generated in situ by the hypoiodite-catalyzed oxidation of TEMPO, at C-3 position followed by elimination and epoxidation might give epoxyindolenines. This serendipitous finding prompted us to develop a chemoselective divergent synthesis of peroxy- and epoxyindolenines by simple modification of the reaction conditions.
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Affiliation(s)
- Muhammet Uyanik
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Hiroki Tanaka
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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31
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Xin HL, Pang B, Choi J, Akkad W, Morimoto H, Ohshima T. C-C Bond Cleavage of Unactivated 2-Acylimidazoles. J Org Chem 2020; 85:11592-11606. [PMID: 32819091 DOI: 10.1021/acs.joc.0c01458] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
2-Acylimidazoles are widely used as post-transformable carboxylic acid equivalents in chemoselective and enantioselective reactions. Their transformations, however, require pretreatment with highly reactive, toxic methylating reagents to facilitate C-C bond cleavage. Here, we demonstrate that such pretreatment can be avoided and the C-C bond cleaved under neutral conditions without the use of additional reagents or catalysts. The scope of the reaction, including the use of products reported in the literature as substrates, and some mechanistic insights are described.
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Affiliation(s)
- Hai-Long Xin
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Bo Pang
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Jeesoo Choi
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Walaa Akkad
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hiroyuki Morimoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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32
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Song XF, Ding TM, Zhu D, Huang J, Chen ZM. Lewis-Acid-Mediated Intramolecular Trifluoromethylthiolation of Alkenes with Phenols: Access to SCF 3-Containing Chromane and Dihydrobenzofuran Compounds. Org Lett 2020; 22:7052-7056. [PMID: 32840107 DOI: 10.1021/acs.orglett.0c02744] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A Lewis-acid-mediated intramolecular trifluoromethylthiolation of alkenes with phenols that can offer direct access to SCF3-containing chromane and dihydrobenzofuran compounds was disclosed for the first time. Numerous SCF3-containing chromanes were obtained in moderate to good yields using γ-substituted 2-allyphenols as substrates. Meanwhile, various SCF3-containing dihydrobenzofurans with oxa-quaternary centers were also delivered in moderate to good yields using β-substituted 2-allyphenols as substrates.
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Affiliation(s)
- Xu-Feng Song
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Tong-Mei Ding
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Deng Zhu
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jie Huang
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Zhi-Min Chen
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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33
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Zhao R, Fu K, Fang Y, Zhou J, Shi L. Site‐Specific C(sp
3
)–H Aminations of Imidates and Amidines Enabled by Covalently Tethered Distonic Radical Anions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Rong Zhao
- School of Science Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China
| | - Kang Fu
- School of Science Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China
| | - Yuanding Fang
- School of Science Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China
| | - Jia Zhou
- School of Science Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China
| | - Lei Shi
- School of Science Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 China
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34
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Yoshida K, Inoue H, Oji Y, Suzuki H, Takao KI. Enantioselective Organocatalytic Construction of Spirochroman Derivatives. J Org Chem 2020; 85:10189-10197. [PMID: 32672459 DOI: 10.1021/acs.joc.0c00589] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Highly enantioselective organocatalytic construction of spirochromans containing a tetrasubstituted stereocenter was developed. Intramolecular oxy-Michael addition was catalyzed with a bifunctional cinchona alkaloid thiourea catalyst. A variety of spirochroman compounds containing a tetrasubstituted stereocenter were obtained with excellent enantioselectivities of up to 99% enantiomeric excess. The reaction was applied to the asymmetric formal synthesis of (-)-(R)-cordiachromene.
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Affiliation(s)
- Keisuke Yoshida
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Hiroki Inoue
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yurika Oji
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Hina Suzuki
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Ken-Ichi Takao
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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35
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Mairhofer C, Novacek J, Waser M. Synergistic Ammonium (Hypo)Iodite/Imine Catalysis for the Asymmetric α-Hydroxylation of β-Ketoesters. Org Lett 2020; 22:6138-6142. [PMID: 32706973 PMCID: PMC7418104 DOI: 10.1021/acs.orglett.0c02198] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Indexed: 12/14/2022]
Abstract
The synergistic use of chiral bifunctional ammonium iodide catalysts in combination with simple catalytically relevant aldimines allows for an unprecedented asymmetric α-hydroxylation reaction of β-ketoesters using H2O2. The reaction proceeds via in situ formation of a hypervalent iodine species, which then reacts with the used aldimine to generate an activated electrophilic oxygen transfer reagent.
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Affiliation(s)
- Christopher Mairhofer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
| | | | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
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36
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Uyanik M, Sahara N, Tsukahara M, Hattori Y, Ishihara K. Chemo‐ and Enantioselective Oxidative α‐Azidation of Carbonyl Compounds. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007552] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Muhammet Uyanik
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Naoto Sahara
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Mayuko Tsukahara
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Yuhei Hattori
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
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37
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Uyanik M, Sahara N, Tsukahara M, Hattori Y, Ishihara K. Chemo‐ and Enantioselective Oxidative α‐Azidation of Carbonyl Compounds. Angew Chem Int Ed Engl 2020; 59:17110-17117. [DOI: 10.1002/anie.202007552] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Muhammet Uyanik
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Naoto Sahara
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Mayuko Tsukahara
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Yuhei Hattori
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
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38
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Yang Q, Li S, Wang J(J. Asymmetric Synthesis of Chiral Chromanes by Copper‐Catalyzed Hydroamination of 2
H
‐Chromenes. ChemCatChem 2020. [DOI: 10.1002/cctc.202000601] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Qingjing Yang
- School of Chemistry and Chemical EngineeringHarbin Institute of Technology Harbin 150080 P. R. China
- Department of ChemistrySouthern University of Science and Technology Shenzhen Guangdong 518055 P. R. China
| | - Sifeng Li
- Department of ChemistrySouthern University of Science and Technology Shenzhen Guangdong 518055 P. R. China
| | - Jun (Joelle) Wang
- Department of ChemistrySouthern University of Science and Technology Shenzhen Guangdong 518055 P. R. China
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39
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Macías-Benítez P, Moreno-Dorado FJ, Guerra FM. Microwave-Enhanced Coupling of Carboxylic Acids with Liquid Ketones and Cyclic Ethers Using Tetrabutylammonium Iodide/ t-Butyl Hydroperoxide. J Org Chem 2020; 85:6027-6043. [PMID: 32270681 DOI: 10.1021/acs.joc.0c00519] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The oxidative coupling of carboxylic acids with liquid ketones and cyclic ethers has been accomplished in minutes using t-butyl hydroperoxide in the presence of tetrabutylammonium iodide under microwave irradiation in the absence of a solvent. In addition to drastically shortening the reaction times, the use of microwaves resulted, in general, in yields equal to or higher than those obtained by conventional heating.
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Affiliation(s)
- Pablo Macías-Benítez
- Departamento de Quı́mica Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - F Javier Moreno-Dorado
- Departamento de Quı́mica Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Francisco M Guerra
- Departamento de Quı́mica Orgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
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40
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Uyanik M, Nishioka K, Kondo R, Ishihara K. Chemoselective oxidative generation of ortho-quinone methides and tandem transformations. Nat Chem 2020; 12:353-362. [DOI: 10.1038/s41557-020-0433-4] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 01/29/2020] [Indexed: 12/27/2022]
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41
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Huang B, Yang C, Zhou J, Xia W. Electrochemically generated N-iodoaminium species as key intermediates for selective methyl sulphonylimination of tertiary amines. Chem Commun (Camb) 2020; 56:5010-5013. [DOI: 10.1039/c9cc09869k] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study presents a straightforward protocol for approaching N-sulphonylamidines via an electricity-driven, iodine-mediated cross dehydrogenative condensation (CDC) between sulphonamides and tertiary amines.
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Affiliation(s)
- Binbin Huang
- State Key Lab of Urban Water Resource and Environment
- School of Science, Harbin Institute of Technology (Shenzhen)
- Shenzhen 518055
- China
| | - Chao Yang
- State Key Lab of Urban Water Resource and Environment
- School of Science, Harbin Institute of Technology (Shenzhen)
- Shenzhen 518055
- China
| | - Jia Zhou
- State Key Lab of Urban Water Resource and Environment
- School of Science, Harbin Institute of Technology (Shenzhen)
- Shenzhen 518055
- China
| | - Wujiong Xia
- State Key Lab of Urban Water Resource and Environment
- School of Science, Harbin Institute of Technology (Shenzhen)
- Shenzhen 518055
- China
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42
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Tan C, Liu Y, Liu X, Jia H, Xu K, Huang S, Wang J, Tan J. Stereoselective synthesis of trans-aziridines via intramolecular oxidative C(sp3)–H amination of β-amino ketones. Org Chem Front 2020. [DOI: 10.1039/c9qo01489f] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
An expedient strategy for the synthesis of trans-2,3-disubstituted via the intramolecular KI/TBHP mediated oxidative dehydrogenative C(sp3)–H amination reaction was presented.
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Affiliation(s)
- Chen Tan
- Department of Organic Chemistry
- College of Chemistry
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Yongguo Liu
- Beijing Key Laboratory of Flavor Chemistry
- Beijing Technology and Business University (BTBU)
- Beijing 100048
- China
| | - Xinyuan Liu
- Department of Organic Chemistry
- College of Chemistry
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Huanxin Jia
- Department of Organic Chemistry
- College of Chemistry
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Kun Xu
- College of Chemistry and Pharmaceutical Engineering
- Nanyang Normal University
- Nanyang
- China
| | - Sihan Huang
- Department of Organic Chemistry
- College of Chemistry
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Jingwen Wang
- Department of Organic Chemistry
- College of Chemistry
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Jiajing Tan
- Department of Organic Chemistry
- College of Chemistry
- Beijing University of Chemical Technology
- Beijing 100029
- China
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43
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Uyanik M, Sahara N, Katade O, Ishihara K. Chemoselective Oxidative Spiroetherification and Spiroamination of Arenols Using I+/Oxone Catalysis. Org Lett 2019; 22:560-564. [DOI: 10.1021/acs.orglett.9b04324] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Muhammet Uyanik
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Naoto Sahara
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Outa Katade
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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44
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Uyanik M, Kato T, Sahara N, Katade O, Ishihara K. High-Performance Ammonium Hypoiodite/Oxone Catalysis for Enantioselective Oxidative Dearomatization of Arenols. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04322] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Muhammet Uyanik
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Takehiro Kato
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Naoto Sahara
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Outa Katade
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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45
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Manaprasertsak A, Tharamak S, Schedl C, Roller A, Widhalm M. Improved Access to Chiral Tetranaphthoazepinium-Based Organocatalysts Using Aqueous Ammonia as Nitrogen Source. Molecules 2019; 24:molecules24213844. [PMID: 31731415 PMCID: PMC6864439 DOI: 10.3390/molecules24213844] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 10/22/2019] [Accepted: 10/23/2019] [Indexed: 11/16/2022] Open
Abstract
The class of 3,3'-diaryl substituted tetranaphthobisazepinium bromides has found wide application as highly efficient C2-symmetrical phase-transfer catalysts (PTCs, Maruoka type catalysts). Unfortunately, the synthesis requires a large number of steps and hampers the build-up of catalyst libraries which are often desired for screening experiments. Here, we present a more economic strategy using dinaphthoazepine 7 as the common key intermediate. Only at this stage various aryl substituents are introduced, and only two individual steps are required to access target structures. This protocol was applied to synthesize ten tetranaphthobisazepinium compounds 1a-1j. Their efficiency as PTCs was tested in the asymmetric substitution of tert-butyl 2-((diphenylmethylene)amino)acetate. Enantioselectivities up to 92% have been observed with new catalysts.
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Affiliation(s)
- Auraya Manaprasertsak
- Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand; (A.M.); (S.T.)
| | - Sorachat Tharamak
- Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand; (A.M.); (S.T.)
| | - Christina Schedl
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Wien, Austria;
| | - Alexander Roller
- Institute of Inorganic Chemistry, University of Vienna, Währinger Straße 42, Wien 1090, Austria;
| | - Michael Widhalm
- Institute of Chemical Catalysis, University of Vienna, Währinger Straße 38, 1090 Wien, Austria
- Correspondence: ; Tel.: +43-01-4277-70305
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46
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Wang D, Lu X, Sun S, Yu H, Su H, Wu Y, Zhong F. Unified and Benign Synthesis of Spirooxindoles via Bifunctional and Recyclable Iodide-Salt-Catalyzed Oxidative Coupling in Water. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900751] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Dangui Wang
- Key laboratory of Material Chemistry for Energy Conversion and Storage; Ministry of Education; Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica; School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology (HUST); 1037 Luoyu Road 430074 Wuhan China
- Shenzhen Huazhong University of Science and Technology Research Institute; 518000 Shenzhen PR China
| | - Xunbo Lu
- Key laboratory of Material Chemistry for Energy Conversion and Storage; Ministry of Education; Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica; School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology (HUST); 1037 Luoyu Road 430074 Wuhan China
| | - Shaohan Sun
- Key laboratory of Material Chemistry for Energy Conversion and Storage; Ministry of Education; Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica; School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology (HUST); 1037 Luoyu Road 430074 Wuhan China
| | - Huaibin Yu
- Key laboratory of Material Chemistry for Energy Conversion and Storage; Ministry of Education; Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica; School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology (HUST); 1037 Luoyu Road 430074 Wuhan China
| | - Huimin Su
- Key laboratory of Material Chemistry for Energy Conversion and Storage; Ministry of Education; Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica; School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology (HUST); 1037 Luoyu Road 430074 Wuhan China
| | - Yuzhou Wu
- Key laboratory of Material Chemistry for Energy Conversion and Storage; Ministry of Education; Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica; School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology (HUST); 1037 Luoyu Road 430074 Wuhan China
| | - Fangrui Zhong
- Key laboratory of Material Chemistry for Energy Conversion and Storage; Ministry of Education; Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica; School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology (HUST); 1037 Luoyu Road 430074 Wuhan China
- Shenzhen Huazhong University of Science and Technology Research Institute; 518000 Shenzhen PR China
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47
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Enantioselective, Organocatalytic, Dissymmetric 1,4- and 1,2-Addition of Malononitrile to a Keto-bisenone Followed by an Oxa-Michael Addition Cascade. Org Lett 2019; 21:5793-5797. [PMID: 31298544 DOI: 10.1021/acs.orglett.9b01705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An unprecedented enantioselective dissymmetric 1,4- and 1,2-addition of malononitrile to a keto-bisenone followed by an oxa-Michael addition cascade to trap the in situ generated unstable tertiary alcohol have been developed. The quinine-derived amino-squaramide bifunctional organocatalyst worked efficiently and provides the oxa-spiro-[4,4]-nonanes in good yields and excellent diastereo- and enantioselectivities (up to 99:1 dr and 99% ee). Notably, a complete chemoselective addition of a methylene unit to an aliphatic-tethered enone over the aromatic-tethered enone was observed.
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48
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Yang N, Yuan G. One-pot synthesis of 1,3,4-oxadiazol-2(3H)-ones with CO 2 as a C1 synthon promoted by hypoiodite. Org Biomol Chem 2019; 17:6639-6644. [PMID: 31243402 DOI: 10.1039/c9ob01200a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A convenient and efficient route has been developed to synthesize 1,3,4-oxadiazol-2(3H)-ones from CO2, hydrazines and aryl or aliphatic aldehydes. Promoted by hypoiodite (IO-) generated in situ from KI and oxidant TBHP, the one-pot synthesis could proceed smoothly to afford the desired products in moderate to high yields. Mechanism studies revealed that nitrile imine was an important intermediate in this transformation. Notably, a commercial herbicide Oxadiazon could be successfully synthesized by this route.
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Affiliation(s)
- Na Yang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P.R. China.
| | - Gaoqing Yuan
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P.R. China.
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49
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Lauberteaux J, Pichon D, Baslé O, Mauduit M, Marcia de Figueiredo R, Campagne J. Acyl‐Imidazoles: A Privileged Ester Surrogate for Enantioselective Synthesis. ChemCatChem 2019. [DOI: 10.1002/cctc.201900754] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jimmy Lauberteaux
- ICGM – UMR 5253Univ Montpellier, CNRS, ENSCM 240 Avenue du Professeur Emile Jeanbrau 34296 Montpellier Cedex 5 France
| | - Delphine Pichon
- Univ RennesEcole Nationale Supérieure de Chimie de Rennes CNRS, ISCR UMR 6226 11 Allée de Beaulieu CS 50837, 35708 Rennes Cedex 7 France
| | - Olivier Baslé
- Laboratoire de Chimie de Coordination, CNRS, UPR 8241 205 Route de Narbonne 31077 Toulouse Cedex 4 France
| | - Marc Mauduit
- Univ RennesEcole Nationale Supérieure de Chimie de Rennes CNRS, ISCR UMR 6226 11 Allée de Beaulieu CS 50837, 35708 Rennes Cedex 7 France
| | - Renata Marcia de Figueiredo
- ICGM – UMR 5253Univ Montpellier, CNRS, ENSCM 240 Avenue du Professeur Emile Jeanbrau 34296 Montpellier Cedex 5 France
| | - Jean‐Marc Campagne
- ICGM – UMR 5253Univ Montpellier, CNRS, ENSCM 240 Avenue du Professeur Emile Jeanbrau 34296 Montpellier Cedex 5 France
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50
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Kazi I, Guha S, Sekar G. Halogen Bond-Assisted Electron-Catalyzed Atom Economic Iodination of Heteroarenes at Room Temperature. J Org Chem 2019; 84:6642-6654. [DOI: 10.1021/acs.joc.9b00174] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Imran Kazi
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
| | - Somraj Guha
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
| | - Govindasamy Sekar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
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