1
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Nakashima K, Yordanov D, Matsushima Y, Hirashima SI, Miura T, Georgiev A. Rearrangement of C2-Spirooxindoles: Conversion to the 2-Hydroxyhemi-Indigo and Chromenoindole. J Org Chem 2024; 89:12401-12409. [PMID: 39190852 DOI: 10.1021/acs.joc.4c01362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
This study demonstrates the rearrangement of C2-spirooxindoles to the 2-hydroxyhemi-indigo and chromenoindole. The N-H-spirooxindole exhibits double proton translocation and its conversion to the (Z)-2-hydroxyhemi-indigo photoswitch with trifluoroacetic acid, while the N-methyl-spirooxindole undergoes structural rearrangement to the chromenoindole. The mechanism of the reactions was proposed, and the structure of the products was confirmed by one-dimensional (1D) and two-dimensional (2D) NMR spectra and X-ray structure analysis. The photoswitching performance of (Z)-2-hydroxyhemi-indigo, which allows the stabilization of the E-switched form by intramolecular hydrogen bonding, has been studied in solvents of different polarities. It was found that in the less polar solvents, the E-switched metastable isomer is characterized by high stability.
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Affiliation(s)
- Kosuke Nakashima
- Department of Pharmaceutical Chemistry, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji 192-0392, Tokyo, Japan
| | - Dancho Yordanov
- Department of Organic Chemistry, University of Chemical Technology and Metallurgy, 8 Street Kliment Ohridski Blvd., Sofia 1756, Bulgaria
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Avenue, Bldg. 9, Sofia 1113, Bulgaria
| | - Yasuyuki Matsushima
- Department of Pharmaceutical Chemistry, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji 192-0392, Tokyo, Japan
| | - Shin-Ichi Hirashima
- Department of Pharmaceutical Chemistry, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji 192-0392, Tokyo, Japan
| | - Tsuyoshi Miura
- Department of Pharmaceutical Chemistry, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji 192-0392, Tokyo, Japan
| | - Anton Georgiev
- Department of Organic Chemistry, University of Chemical Technology and Metallurgy, 8 Street Kliment Ohridski Blvd., Sofia 1756, Bulgaria
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2
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Clamor N, Damrath M, Kuczmera TJ, Duvinage D, Nachtsheim BJ. Synthesis of N-acyl carbazoles, phenoxazines and acridines from cyclic diaryliodonium salts. Beilstein J Org Chem 2024; 20:12-16. [PMID: 38213840 PMCID: PMC10777325 DOI: 10.3762/bjoc.20.2] [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: 09/26/2023] [Accepted: 12/21/2023] [Indexed: 01/13/2024] Open
Abstract
N-Acyl carbazoles can be efficiently produced through a single-step process using amides and cyclic diaryliodonium triflates. This convenient reaction is facilitated by copper iodide in p-xylene, using the commonly found activating ligand diglyme. We have tested this method with a wide range of amides and iodonium triflates, proving its versatility with numerous substrates. Beyond carbazoles, we also produced a variety of other N-heterocycles, such as acridines, phenoxazines, or phenazines, showcasing the robustness of our technique. In a broader sense, this new method creates two C-N bonds simultaneously based on a mono-halogenated starting material, thus allowing heterocycle formation with diminished halogen waste.
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Affiliation(s)
- Nils Clamor
- Institute for Organic and Analytical Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
| | - Mattis Damrath
- Institute for Organic and Analytical Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
| | - Thomas J Kuczmera
- Institute for Organic and Analytical Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
| | - Daniel Duvinage
- Institute for Inorganic and Crystallographic Chemistry, University of Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Boris J Nachtsheim
- Institute for Organic and Analytical Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
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3
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Elsherbini M, Moran WJ. Toward a General Protocol for Catalytic Oxidative Transformations Using Electrochemically Generated Hypervalent Iodine Species. J Org Chem 2023; 88:1424-1433. [PMID: 36689352 PMCID: PMC9903329 DOI: 10.1021/acs.joc.2c02309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A simple catalytic electrosynthetic protocol for oxidative transformations mediated by hypervalent iodine reagents has been developed. In this protocol, electricity drives the iodine(I)/iodine(III) catalytic cycle enabling catalysis with in situ generated hypervalent iodine species, thereby eliminating chemical oxidants and the inevitable chemical waste associated with their mode of action. In addition, no added electrolytic salts are needed in this process. The developed method has been validated using two different hypervalent iodine-mediated transformations: (i) the oxidative cyclization of N-allylic and N-homoallylic amides to the corresponding dihydrooxazole and dihydro-1,3-oxazine derivatives, respectively, and (ii) the α-tosyloxylation of ketones. Both reactions proceeded smoothly under the developed catalytic electrosynthetic conditions without reoptimization, featuring a wide substrate scope and excellent functional group tolerance. In addition, scale-up to gram-scale and catalyst recovery were easily achieved maintaining the high efficiency of the process.
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4
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Kuczmera TJ, Dietz A, Boelke A, Nachtsheim BJ. Synthesis and reactivity of azole-based iodazinium salts. Beilstein J Org Chem 2023; 19:317-324. [PMID: 36960303 PMCID: PMC10028571 DOI: 10.3762/bjoc.19.27] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/06/2023] [Indexed: 03/18/2023] Open
Abstract
A systematic investigation of imidazo- and pyrazoloiodazinium salts is presented. Besides a robust synthetic protocol that allowed us to synthesize these novel cyclic iodonium salts in their mono- and dicationic forms, we gained in-depth structural information through single-crystal analysis and demonstrated the ring opening of the heterocycle-bridged iodonium species. For an exclusive set of dicationic imidazoiodaziniums, we show highly delicate post-oxidation functionalizations retaining the hypervalent iodine center.
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Affiliation(s)
- Thomas J Kuczmera
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Annalena Dietz
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Andreas Boelke
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Boris J Nachtsheim
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
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5
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Linde E, Knippenberg N, Olofsson B. Synthesis of Cyclic and Acyclic ortho-Aryloxy Diaryliodonium Salts for Chemoselective Functionalizations. Chemistry 2022; 28:e202202453. [PMID: 36083826 PMCID: PMC10092902 DOI: 10.1002/chem.202202453] [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] [Indexed: 12/14/2022]
Abstract
Two regioselective, high-yielding one-pot routes to oxygen-bridged cyclic diaryliodonium salts and ortho-aryloxy-substituted acyclic diaryliodonium salts are presented. Starting from easily available ortho-iodo diaryl ethers, complete selectivity in formation of either the cyclic or acyclic product could be achieved by varying the reaction conditions. The complimentary reactivities of these novel ortho-oxygenated iodonium salts were demonstrated through a series of chemoselective arylations under metal-catalyzed and metal-free conditions, to deliver a range of novel, ortho-functionalized diaryl ether derivatives.
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Affiliation(s)
- Erika Linde
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Niels Knippenberg
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Berit Olofsson
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91, Stockholm, Sweden
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6
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Synthesis of benzo[b]thieno[2,3-c]quinolines via palladium-catalyzed ring-closing reaction. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Borissov A, Maurya YK, Moshniaha L, Wong WS, Żyła-Karwowska M, Stępień M. Recent Advances in Heterocyclic Nanographenes and Other Polycyclic Heteroaromatic Compounds. Chem Rev 2022; 122:565-788. [PMID: 34850633 PMCID: PMC8759089 DOI: 10.1021/acs.chemrev.1c00449] [Citation(s) in RCA: 213] [Impact Index Per Article: 106.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Indexed: 12/21/2022]
Abstract
This review surveys recent progress in the chemistry of polycyclic heteroaromatic molecules with a focus on structural diversity and synthetic methodology. The article covers literature published during the period of 2016-2020, providing an update to our first review of this topic (Chem. Rev. 2017, 117 (4), 3479-3716).
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Affiliation(s)
| | | | | | | | | | - Marcin Stępień
- Wydział Chemii, Uniwersytet
Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
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8
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Uppalabat T, Tapdara A, Khaikate O, Worakul T, Surawatanawong P, Leowanawat P, Soorukram D, Reutrakul V, Meesin J, Kuhakarn C. Synthesis of indolo- and benzothieno[3,2-c]quinolines via POCl3 mediated tandem cyclization of o-alkynylisocyanobenzenes derived from o-alkynyl-N-phenylformamides. NEW J CHEM 2022. [DOI: 10.1039/d2nj02791g] [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
A synthesis of indolo[3,2-c]quinolines and benzothieno[3,2-c]quinolines has been developed employing o-alkynyl-N-phenylformamide derivatives as the substrates. The reaction proceeded via a tandem process involving POCl3‒assisted intramolecular cyclization of the firstly formed...
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9
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M. Honnanayakanavar J, Owk O, Suresh S. Recent Advances in the Tandem Copper-Catalyzed Ullmann-Goldberg N-Arylation–Cyclization Strategies. Org Biomol Chem 2022; 20:2993-3028. [DOI: 10.1039/d2ob00082b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N‒Aryl bond formation under copper catalysis has been playing a pivotal role and has been extensively used as a key step in the total syntheses of several therapeutic molecules. The...
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10
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Fu J, Li B, Wang X, Liang Q, Peng X, Yang L, Wan T, Wang X, Lin B, Cheng M, Liu Y. Au(I)‐Catalyzed 6‐
endo
‐
dig
Cyclizations of Aromatic 1,
5‐Enynes
to 2‐(Naphthalen‐2‐yl)anilines Leading to Divergent Syntheses of Benzo[
α
]carbazole, Benzo[
c
,
h
]cinnoline and Dibenzo[
i
]phenanthridine Derivatives. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jiayue Fu
- Key Laboratory of Structure‐Based Drug Design and Discovery (Shenyang Pharmaceutical University), Ministry of Education Shenyang Liaoning 110016 China
- Wuya College of Innovation Shenyang Pharmaceutical University Shenyang Liaoning 110016 China
- Institute of Drug Research in Medicine Capital of China Benxi Liaoning 117000 China
| | - Bingbing Li
- Key Laboratory of Structure‐Based Drug Design and Discovery (Shenyang Pharmaceutical University), Ministry of Education Shenyang Liaoning 110016 China
- Wuya College of Innovation Shenyang Pharmaceutical University Shenyang Liaoning 110016 China
- Institute of Drug Research in Medicine Capital of China Benxi Liaoning 117000 China
| | - Xiugui Wang
- Key Laboratory of Structure‐Based Drug Design and Discovery (Shenyang Pharmaceutical University), Ministry of Education Shenyang Liaoning 110016 China
- Institute of Drug Research in Medicine Capital of China Benxi Liaoning 117000 China
| | - Qida Liang
- Key Laboratory of Structure‐Based Drug Design and Discovery (Shenyang Pharmaceutical University), Ministry of Education Shenyang Liaoning 110016 China
- Wuya College of Innovation Shenyang Pharmaceutical University Shenyang Liaoning 110016 China
- Institute of Drug Research in Medicine Capital of China Benxi Liaoning 117000 China
| | - Xiaoshi Peng
- Key Laboratory of Structure‐Based Drug Design and Discovery (Shenyang Pharmaceutical University), Ministry of Education Shenyang Liaoning 110016 China
- Institute of Drug Research in Medicine Capital of China Benxi Liaoning 117000 China
| | - Lu Yang
- Key Laboratory of Structure‐Based Drug Design and Discovery (Shenyang Pharmaceutical University), Ministry of Education Shenyang Liaoning 110016 China
- Wuya College of Innovation Shenyang Pharmaceutical University Shenyang Liaoning 110016 China
- Institute of Drug Research in Medicine Capital of China Benxi Liaoning 117000 China
| | - Tao Wan
- Liaoning Kangboshi Pharmaceutical Co. LTD Anshan Liaoning 114100 China
| | - Xinxiu Wang
- Key Laboratory of Structure‐Based Drug Design and Discovery (Shenyang Pharmaceutical University), Ministry of Education Shenyang Liaoning 110016 China
- Institute of Drug Research in Medicine Capital of China Benxi Liaoning 117000 China
| | - Bin Lin
- Key Laboratory of Structure‐Based Drug Design and Discovery (Shenyang Pharmaceutical University), Ministry of Education Shenyang Liaoning 110016 China
- Institute of Drug Research in Medicine Capital of China Benxi Liaoning 117000 China
| | - Maosheng Cheng
- Key Laboratory of Structure‐Based Drug Design and Discovery (Shenyang Pharmaceutical University), Ministry of Education Shenyang Liaoning 110016 China
- Institute of Drug Research in Medicine Capital of China Benxi Liaoning 117000 China
| | - Yongxiang Liu
- Key Laboratory of Structure‐Based Drug Design and Discovery (Shenyang Pharmaceutical University), Ministry of Education Shenyang Liaoning 110016 China
- Wuya College of Innovation Shenyang Pharmaceutical University Shenyang Liaoning 110016 China
- Institute of Drug Research in Medicine Capital of China Benxi Liaoning 117000 China
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11
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Nguyen Tien TA, Miliutina M, Radolko J, Thom R, Dang TT, Ehlers P, Langer P. Synthesis of chromeno[2,3-c]pyrrol-9(2H)-ones by domino Michael-Claisen-SNAr reactions of amino acid esters with 2-chlorophenylpropynones. Tetrahedron 2022. [DOI: 10.1016/j.tet.2021.132608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Kobayashi A, Matsuzawa T, Hosoya T, Yoshida S. Thioxanthone Synthesis from Benzoic Acid Esters through Directed ortho-Lithiation. CHEM LETT 2021. [DOI: 10.1246/cl.210293] [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)
- Akihiro Kobayashi
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Tsubasa Matsuzawa
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Suguru Yoshida
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
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13
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Antonkin NS, Vlasenko YA, Yoshimura A, Smirnov VI, Borodina TN, Zhdankin VV, Yusubov MS, Shafir A, Postnikov PS. Preparation and Synthetic Applicability of Imidazole-Containing Cyclic Iodonium Salts. J Org Chem 2021; 86:7163-7178. [PMID: 33944564 DOI: 10.1021/acs.joc.1c00483] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A novel approach to the preparation of imidazole-substituted cyclic iodonium salts has been developed via the oxidative cyclization of 1-phenyl-5-iodoimidazole using a cheap and available Oxone/H2SO4 oxidative system. The structure of the new polycyclic heteroarenes has been confirmed by single-crystal X-ray diffractometry, revealing the characteristic structure features for cyclic iodonium salts. The newly produced imidazole-flanked cyclic iodonium compounds were found to readily engage in a heterocyclization reaction with elemental sulfur, affording benzo[5,1-b]imidazothiazoles in good yields.
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Affiliation(s)
- Nikita S Antonkin
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
| | - Yulia A Vlasenko
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
| | - Akira Yoshimura
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
| | - Vladimir I Smirnov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky Str., 1, Irkutsk 664033, Russian Federation
| | - Tatyana N Borodina
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky Str., 1, Irkutsk 664033, Russian Federation
| | - Viktor V Zhdankin
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian Federation.,Department of Chemistry and Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812, United States
| | - Mekhman S Yusubov
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
| | - Alexandr Shafir
- Department of Biological Chemistry, IQAC-CSIC, c/Jordi Girona 18-26, Barcelona 08034, Spain
| | - Pavel S Postnikov
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian Federation.,Department of Solid-State Engineering, University of Chemistry and Technology, Prague 16628, Czech Republic
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14
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Elsherbini M, Moran WJ. Scalable electrochemical synthesis of diaryliodonium salts. Org Biomol Chem 2021; 19:4706-4711. [PMID: 33960987 DOI: 10.1039/d1ob00457c] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclic and acyclic diaryliodonium are synthesised by anodic oxidation of iodobiaryls and iodoarene/arene mixtures, respectively, in a simple undivided electrolysis cell in MeCN-HFIP-TfOH without any added electrolyte salts. This atom efficient process does not require chemical oxidants and generates no chemical waste. More than 30 cyclic and acyclic diaryliodonium salts with different substitution patterns were prepared in very good to excellent yields. The reaction was scaled-up to 10 mmol scale giving more than four grams of dibenzo[b,d]iodol-5-ium trifluoromethanesulfonate (>95%) in less than three hours. The solvent mixture of the large-scale experiment was recovered (>97%) and recycled several times without significant reduction in yield.
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Affiliation(s)
- Mohamed Elsherbini
- Department of Chemistry, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK.
| | - Wesley J Moran
- Department of Chemistry, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK.
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15
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Boelke A, Kuczmera TJ, Caspers LD, Lork E, Nachtsheim BJ. Iodolopyrazolium Salts: Synthesis, Derivatizations, and Applications. Org Lett 2020; 22:7261-7266. [PMID: 32880463 DOI: 10.1021/acs.orglett.0c02593] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of iodolopyrazolium triflates via an oxidative cyclization of 3-(2-iodophenyl)-1H-pyrazoles is described. The reaction is characterized by a broad substrate scope, and various applications of these novel cyclic iodolium salts acting as useful synthetic intermediates are demonstrated, in particular in site-selective ring openings. This was finally applied to generate derivatives of the anti-inflammatory drug celecoxib. Their application as highly active halogen-bond donors is shown as well.
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Affiliation(s)
- Andreas Boelke
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Thomas J Kuczmera
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Lucien D Caspers
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Enno Lork
- Institute for Inorganic Chemistry and Crystallography, University of Bremen, 28359 Bremen, Germany
| | - Boris J Nachtsheim
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
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16
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Mutsuura K, Sakata Y, Uchida K, Hosoya T, Yoshida S. Synthesis of Thioxanthones through Formal C–H Thiolation of Benzoic Acid Esters and Acid-mediated Direct Cyclization. CHEM LETT 2020. [DOI: 10.1246/cl.200190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Kotaro Mutsuura
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Yuki Sakata
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Keisuke Uchida
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Suguru Yoshida
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
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