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Chen ML, Chou CW, Zhu JL, Tsai MH. Access to cyclohexadiene and benzofuran derivatives via catalytic arene cyclopropanation of α-cyanodiazocarbonyl compounds. Org Biomol Chem 2024. [PMID: 38904217 DOI: 10.1039/d4ob00696h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
The arene cyclopropanation between diazo compounds and benzene is well known to produce a tautomeric mixture of norcaradiene and cycloheptatriene in favour of the latter species. Nevertheless, previous studies have suggested that the initially formed norcaradiene can be stabilized by a C-7 cyano group with prevention of its 6π-electrocyclic ring opening. According to this feature, a synthetic route to functionalized cyclohexadienes has been designed using α-cyanodiazoacetates and α-diazo-β-ketonitriles as the starting materials, respectively. The Rh2(esp)2-catalyzed arene cyclopropanation of α-cyanodiazoacetates in benzene afforded the expected 7-alkoxycarbonyl-7-cyanonorcaradienes as isolable compounds, which then served as templates for the second cyclopropanation with ethyl diazoacetate or α-cyanodiazocarbonyls to enable the formation of bis(cyclopropanated) adducts. Their subsequent treatment with SmI2 triggered a double ring-opening process, allowing for the generation of 1,4- and/or 1,3-cyclohexadienes as either regio- or diastereomeric mixtures. On the other hand, the norcaradienes generated from phenyl- or methyl-substituted α-diazo-β-ketonitriles were found to undergo an in situ rearrangement to yield dihydrobenzofurans that could be converted to benzofuran derivatives by DDQ oxidation.
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Affiliation(s)
- Mei-Lin Chen
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, R.O.C..
| | - Chi-Wen Chou
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, R.O.C..
| | - Jia-Liang Zhu
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, R.O.C..
| | - Ming-Hsuan Tsai
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, R.O.C..
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2
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Li X, Wu P, Wang W, Xue J, Li H, Tan H, Wei X. Anti-MRSA Dimeric and Brominated Phenyltetracenoids Produced by Streptomyces morookaense SC1169. JOURNAL OF NATURAL PRODUCTS 2023; 86:2571-2579. [PMID: 37947788 DOI: 10.1021/acs.jnatprod.3c00788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Eleven new phenyltetracenoid polyketides, streptovertimycins U (1) and V (2), 14-bromo-streptovertidione (3), streptovertimycins W-Y (4-6), and streptovertimycins Z1-Z5 (7-11), together with the known congeners fasamycins R (12) and S (13) and accramycins A (14) and B (15), were isolated from the NaBr-supplemented rice-grown cultures of Streptomyces morookaense SC1169. Their structures were elucidated by extensive spectroscopic analysis, single-crystal X-ray diffraction analysis, and theoretical computations of ECD spectra. Compounds 1 and 2 are methylene-bridged dimers of accramycin A, and compounds 3 and 7-11 are brominated fasamycin congeners. Compounds 5 and 8-14 exhibited activity against the drug-resistant bacteria MRSA and VRE (MIC = 0.6-5.0 μg/mL), and the dimer 1 displayed activity against MRSA (MIC = 2.5 μg/mL). Compounds 6-15 showed cytotoxicity against the human carcinoma A549, HeLa, HepG2, and MCF-7 cells in the IC50 range between 1.7 and 9.2 μM.
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Affiliation(s)
- Xiaoxia Li
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
- School of Life Sciences, University of Chinese Academy of Sciences, Yuquanlu 19A, Beijing 100049, People's Republic of China
| | - Ping Wu
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
| | - Wanfang Wang
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
- School of Life Sciences, University of Chinese Academy of Sciences, Yuquanlu 19A, Beijing 100049, People's Republic of China
| | - Jinghua Xue
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
| | - Hanxiang Li
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
| | - Haibo Tan
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
| | - Xiaoyi Wei
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
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3
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A Convenient Diels-Alder Approach toward Potential Polyketide-like Antibiotics Using α-Activated α,β-Unsaturated 4,4-Dimethyl-1-tetralones as Dienophiles. Molecules 2023; 28:molecules28062739. [PMID: 36985714 PMCID: PMC10057133 DOI: 10.3390/molecules28062739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 03/22/2023] Open
Abstract
Making use of a Diels–Alder approach based on various α,β-unsaturated 2-carbomethoxy-4,4-dimethyl-1-tetralones as novel dienophiles, the corresponding polycyclic adducts could be efficiently synthesized in good to high yields (74~99%) in the presence of Lewis acid (e.g., SnCl4). Accordingly, a synthetically useful platform is established to provide a focused aromatic polyketide-like library for screening of potential natural and non-natural antimicrobial agents.
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4
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Jiang K, Yan X, Deng Z, Lei C, Qu X. Expanding the Chemical Diversity of Fasamycin Via Genome Mining and Biocatalysis. JOURNAL OF NATURAL PRODUCTS 2022; 85:943-950. [PMID: 35325544 DOI: 10.1021/acs.jnatprod.1c01089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Genome mining and biocatalytic modification of chemical structures are critical methods to develop new antibiotics. In this study, eight new fasamycins (3, 4, 6, and 8-12) along with five known analogues (1, 2, 5, 7, and 13) were obtained by the overexpression of two phosphopantetheinyl transferases (PPtases) in Streptomyces kanamyceticus and biocatalytic transformation with two halogenases. These new compounds displayed significant activity against Staphylococcus aureus and Bacillus subtilis, in particular, C-29-methyl and C-2/C-22-halogen derivatives. This study increases the chemical diversity of bioactive fasamycin derivatives and provides useful halogenation tools for engineering their scaffolds.
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Affiliation(s)
- Kai Jiang
- State Key Laboratory of Microbial Metabolism & School of Life Sciences and Biotechnology and Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaoli Yan
- State Key Laboratory of Microbial Metabolism & School of Life Sciences and Biotechnology and Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zixin Deng
- State Key Laboratory of Microbial Metabolism & School of Life Sciences and Biotechnology and Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chun Lei
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Xudong Qu
- State Key Laboratory of Microbial Metabolism & School of Life Sciences and Biotechnology and Joint International Research Laboratory of Metabolic and Developmental Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
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5
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Zhang Q, He H, Gao S. Total Synthesis of Streptovertidione and Bioinspired Transformation to Streptovertidine A and Formicapyridine A. Chem Commun (Camb) 2022; 58:4239-4242. [DOI: 10.1039/d2cc00947a] [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
We report herein a concise total synthesis of streptovertidione, and its transformation to streptovertidine A and formicapyridine A through a bioinspired pyridination. This stratage features: 1) a one-pot Ti(O-iPr)4-mediated photoenolization/Diels-Alder...
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6
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Zheng J, Wu X, Li WDZ. A model study for the total synthesis of lophotoxin. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Abstract
We report the development of a chemoenzymatic approach toward fasamycin A, a halogenated naphthacenoid that exhibits activities against methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus faecalis. The synthesis was accomplished in a convergent manner: two fragments were combined together in a Sammes annulation to afford a dimethylnaphthacenone system. Finally, an enzymatic halogenation was employed to introduce the requisite chlorine substituent of the natural product at a late stage.
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Affiliation(s)
- Jian Li
- The Scripps Research Institute, Department of Chemistry, 130 Scripps Way, Jupiter, Florida 33458 United States
| | - Hans Renata
- The Scripps Research Institute, Department of Chemistry, 130 Scripps Way, Jupiter, Florida 33458 United States
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8
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Zhang T, Yu M, Huang H. Fe-catalyzed Fukuyama-type indole synthesis triggered by hydrogen atom transfer. Chem Sci 2021; 12:10501-10505. [PMID: 34447542 PMCID: PMC8356753 DOI: 10.1039/d1sc03058b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 07/05/2021] [Indexed: 02/03/2023] Open
Abstract
Fe, Co, and Mn hydride-initiated radical olefin additions have enjoyed great success in modern synthesis, yet the extension of other hydrogen radicalophiles instead of olefins remains largely elusive. Herein, we report an efficient Fe-catalyzed intramolecular isonitrile-olefin coupling reaction delivering 3-substituted indoles, in which isonitrile was firstly applied as the hydrogen atom acceptor in the radical generation step by MHAT. The protocol features low catalyst loading, mild reaction conditions, and excellent functional group tolerance.
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Affiliation(s)
- Tianze Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China Hefei 230026 P. R. China
| | - Min Yu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China Hefei 230026 P. R. China
| | - Hanmin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China Hefei 230026 P. R. China
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9
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Silva TS, Coelho F. Methodologies for the synthesis of quaternary carbon centers via hydroalkylation of unactivated olefins: twenty years of advances. Beilstein J Org Chem 2021; 17:1565-1590. [PMID: 34290837 PMCID: PMC8275869 DOI: 10.3762/bjoc.17.112] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 06/21/2021] [Indexed: 01/01/2023] Open
Abstract
Olefin double-bond functionalization has been established as an excellent strategy for the construction of elaborate molecules. In particular, the hydroalkylation of olefins represents a straightforward strategy for the synthesis of new C(sp3)–C(sp3) bonds, with concomitant formation of challenging quaternary carbon centers. In the last 20 years, numerous hydroalkylation methodologies have emerged that have explored the diverse reactivity patterns of the olefin double bond. This review presents examples of olefins acting as electrophilic partners when coordinated with electrophilic transition-metal complexes or, in more recent approaches, when used as precursors of nucleophilic radical species in metal hydride hydrogen atom transfer reactions. This unique reactivity, combined with the wide availability of olefins as starting materials and the success reported in the construction of all-carbon C(sp3) quaternary centers, makes hydroalkylation reactions an ideal platform for the synthesis of molecules with increased molecular complexity.
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Affiliation(s)
- Thiago S Silva
- Laboratory of Synthesis of Natural Products and Drugs, Department of Organic Chemistry, Chemistry Institute, University of Campinas, PO Box 6154 - 13083-970, Campinas - SP, Brazil
| | - Fernando Coelho
- Laboratory of Synthesis of Natural Products and Drugs, Department of Organic Chemistry, Chemistry Institute, University of Campinas, PO Box 6154 - 13083-970, Campinas - SP, Brazil
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10
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Li X, Wu P, Li H, Xue J, Xu H, Wei X. Antibacterial and Cytotoxic Phenyltetracenoid Polyketides from Streptomyces morookaense. JOURNAL OF NATURAL PRODUCTS 2021; 84:1806-1815. [PMID: 34081476 DOI: 10.1021/acs.jnatprod.1c00208] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Formicapyridine-type racemates, streptovertidines A (1) and B (2), a 7,24-seco-fasamycin, streptovertidione (3), and the fasamycin-type streptovertimycins I-T (4-15), together with 13 known fasamycin congeners (16-28), were isolated from soil-derived Streptomyces morookaense SC1169. Their structures were elucidated by extensive spectroscopic analysis and theoretical computations of ECD spectra. The fasamycin-type compounds 5, 8-12, 14, and 15 exhibited activity against the drug-resistant bacteria MRSA and VRE (MIC: 1.25-10.0 μg/mL). All isolates, except 3, 4, 10, and 24, displayed cytotoxicity against at least one of the human carcinoma A549, HeLa, HepG2, and MCF-7 cells (IC50 < 10.0 μM), of which some were also cytotoxic to the noncancerous Vero cells. Taken together, the activity data demonstrated that the fasamycin-type compounds were more selective to the tested bacteria over the mammalian cells. Structure-activity relationship analysis suggested that chlorination at C-2 in antibacterial fasamycin-type compounds improves the activity and selectivity to the bacteria. Theoretical simulations of reaction paths and chemical reactions for conversion of 3 to 1 were carried out and supported that the pyridine ring formation in formicapyridines proceeds nonenzymatically via 1,5-dicarbonyl condensation with ammonia.
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Affiliation(s)
- Xiaoxia Li
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
- School of Life Sciences, University of Chinese Academy of Sciences, Yuquanlu 19A, Beijing 100049, People's Republic of China
| | - Ping Wu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
| | - Hanxiang Li
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
| | - Jinghua Xue
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
| | - Hanhong Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Xiaoyi Wei
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
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11
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Satham L, Suresh A, Namboothiri INN. Synthesis of Sulfonyloxindoles via Functional Group Exchange Between 3‐Sulfonylphthalide and Isatylidenemalononitrile. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100148] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Alati Suresh
- Department of Chemistry Indian Institute of Technology Bombay Mumbai 400 076 India
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12
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Amin S, Alam MM, Akhter M, Najmi AK, Siddiqui N, Husain A, Shaquiquzzaman M. A review on synthetic procedures and applications of phosphorus oxychloride (POCl 3) in the last biennial period (2018–19). PHOSPHORUS SULFUR 2021. [DOI: 10.1080/10426507.2020.1831499] [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)
- Shaista Amin
- Drug Design & Medicinal Chemistry Lab, Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - M. Mumtaz Alam
- Drug Design & Medicinal Chemistry Lab, Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Mymoona Akhter
- Drug Design & Medicinal Chemistry Lab, Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - A. K. Najmi
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Nadeem Siddiqui
- Drug Design & Medicinal Chemistry Lab, Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Asif Husain
- Drug Design & Medicinal Chemistry Lab, Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - M. Shaquiquzzaman
- Drug Design & Medicinal Chemistry Lab, Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
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13
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Lai YH, Mondal S, Su HT, Huang SC, Wu MH, Huang IW, Yang Lauderdale TL, Song JS, Shia KS, Mong KKT. Total synthesis of landomycins Q and R and related core structures for exploration of the cytotoxicity and antibacterial properties. RSC Adv 2021; 11:9426-9432. [PMID: 35423459 PMCID: PMC8695357 DOI: 10.1039/d1ra01088c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 02/23/2021] [Indexed: 12/27/2022] Open
Abstract
Herein, we report the total synthesis of landomycins Q and R as well as the aglycone core, namely anhydrolandomycinone and a related core analogue. The synthesis features an acetate-assisted arylation method for construction of the hindered B-ring in the core component and a one-pot aromatization-deiodination-denbenzylation procedure to streamline the global functional and protecting group manuipulation. Subsequent cytotoxicity and antibacterial studies revealed that the landomycin R is a potential antibacterial agent against methicillin-resistant Staphylococcus aureus.
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Affiliation(s)
- Yao-Hsuan Lai
- National Chiao Tung University Hsinchu 30010 Taiwan Republic of China
| | - Soumik Mondal
- National Chiao Tung University Hsinchu 30010 Taiwan Republic of China.,National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan Republic of China
| | - Hsin-Tzu Su
- National Chiao Tung University Hsinchu 30010 Taiwan Republic of China.,National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan Republic of China
| | - Sheng-Cih Huang
- National Chiao Tung University Hsinchu 30010 Taiwan Republic of China.,National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan Republic of China
| | - Mine-Hsine Wu
- National Health Research Institutes Miaoli County 35053 Taiwan Republic of China
| | - I-Wen Huang
- National Health Research Institutes Miaoli County 35053 Taiwan Republic of China
| | | | - Jen-Shin Song
- National Health Research Institutes Miaoli County 35053 Taiwan Republic of China
| | - Kak-Shan Shia
- National Health Research Institutes Miaoli County 35053 Taiwan Republic of China
| | - Kwok-Kong Tony Mong
- National Chiao Tung University Hsinchu 30010 Taiwan Republic of China.,National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan Republic of China
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14
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Xie Y, Huang W, Qin S, Fu S, Liu B. Catalytic radical cascade cyclization of alkene-tethered enones to fused bicyclic cyclopropanols. Org Chem Front 2021. [DOI: 10.1039/d1qo01312b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fused bicyclic cyclopropanols were achieved via an unprecedented HAT-triggered radical cascade reaction of alkene-tethered enones in the presence of an iron catalyst.
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Affiliation(s)
- Ying Xie
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, 643000, China
| | - Wei Huang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Song Qin
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Shaomin Fu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
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15
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Discovery of New Antibacterial Accramycins from a Genetic Variant of the Soil Bacterium, Streptomyces sp. MA37. Biomolecules 2020; 10:biom10101464. [PMID: 33092156 PMCID: PMC7590149 DOI: 10.3390/biom10101464] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/12/2020] [Accepted: 10/18/2020] [Indexed: 12/29/2022] Open
Abstract
Continued mining of natural products from the strain Streptomyces sp. MA37 in our laboratory led to the discovery of a minor specialized metabolite (SM) called accramycin A. Owing to its low yield (0.2 mg/L) in the wild type strain, we investigated the roles of regulatory genes in the corresponding biosynthetic gene cluster (acc BGC) through gene inactivation with the aim of improving the titer of this compound. One of the resulting mutants (∆accJ) dramatically upregulated the production of accramycin A 1 by 330-fold (66 mg/L). Furthermore, ten new metabolites, accramycins B-K 2-11, were discovered, together with two known compounds, naphthacemycin B112 and fasamycin C 13 from the mutant extract. This suggested that accJ, annotated as multiple antibiotic resistance regulator (MarR), is a negative regulator gene in the accramycin biosynthesis. Compounds 1-13 inhibited the Gram-positive pathogens (Staphylococcus aureus, Enterococcus faecalis) and clinical isolates Enterococcus faecium (K59-68 and K60-39) and Staphylococcus haemolyticus with minimal inhibitory concentration (MIC) values in the range of 1.5-12.5 µg/mL. Remarkably, compounds 1-13 displayed superior activity against K60-39 (MIC = 3.1-6.3 µg/mL) compared to ampicillin (MIC = 25 µg/mL), and offered promising potential for the development of accramycin-based antibiotics that target multidrug-resistant Enterococcus clinical isolates. Our results highlight the importance of identifying the roles of regulatory genes in natural product discovery.
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16
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Yuan J, Wang L, Ren J, Huang JP, Yu M, Tang J, Yan Y, Yang J, Huang SX. Antibacterial Pentacyclic Polyketides from a Soil-Derived Streptomyces. JOURNAL OF NATURAL PRODUCTS 2020; 83:1919-1924. [PMID: 32519857 DOI: 10.1021/acs.jnatprod.0c00161] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Nine new pentacyclic polyketides, fasamycins G-K (1-5) and formicamycins N-Q (6-9), along with 10 known analogues (10-19), were isolated from a rhizospheric soil-derived Streptomyces sp. KIB-1414. Their structures and absolute configurations were elucidated by interpretation of NMR and HRMS data and comparisons of CD data. The compounds were active against methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus aureus, Bacillus subtilis, and Escherichia coli strains, with MIC values ranging from 0.20 to 50.00 μg/mL.
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Affiliation(s)
- Jie Yuan
- State Key Laboratory of Phytochemistry and Plant Resources in West China and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Li Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
- University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jinqiu Ren
- State Key Laboratory of Phytochemistry and Plant Resources in West China and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
- University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jian-Ping Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West China and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
| | - Mingming Yu
- State Key Laboratory of Phytochemistry and Plant Resources in West China and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
- University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jun Tang
- State Key Laboratory of Phytochemistry and Plant Resources in West China and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
- University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yijun Yan
- State Key Laboratory of Phytochemistry and Plant Resources in West China and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
| | - Jing Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
| | - Sheng-Xiong Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West China and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
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17
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Huang J, Shia K. Development of a Cross‐Conjugated Vinylogous [4+2] Anionic Annulation and Application to the Total Synthesis of Natural Antibiotic (±)‐ABX. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jing‐Kai Huang
- Institute of Biotechnology and Pharmaceutical ResearchNational Health Research Institutes 35 Keyan Road Zhunan Miaoli County 35053 Taiwan, R.O.C
| | - Kak‐Shan Shia
- Institute of Biotechnology and Pharmaceutical ResearchNational Health Research Institutes 35 Keyan Road Zhunan Miaoli County 35053 Taiwan, R.O.C
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18
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Huang JK, Shia KS. Development of a Cross-Conjugated Vinylogous [4+2] Anionic Annulation and Application to the Total Synthesis of Natural Antibiotic (±)-ABX. Angew Chem Int Ed Engl 2020; 59:6540-6545. [PMID: 31944523 PMCID: PMC7187479 DOI: 10.1002/anie.201914657] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 01/02/2020] [Indexed: 12/14/2022]
Abstract
The cross‐conjugated vinylogous [4+2] anionic annulation has been newly developed, the cascade process of which has a high preference for regiochemical control and chemoselectivity, giving rise to exclusively Michael‐type adducts in moderate to high yields (up to 94 %, 35 examples). By making use of this approach as a key operation, the first total synthesis of natural antibiotic ABX, in racemic form, has been successfully achieved in a concise 7‐step sequence with an overall yield of about 20 %.
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Affiliation(s)
- Jing-Kai Huang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli County, 35053, Taiwan, R.O.C
| | - Kak-Shan Shia
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli County, 35053, Taiwan, R.O.C
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19
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Yang L, Li X, Wu P, Xue J, Xu L, Li H, Wei X. Streptovertimycins A-H, new fasamycin-type antibiotics produced by a soil-derived Streptomyces morookaense strain. J Antibiot (Tokyo) 2020; 73:283-289. [PMID: 31949315 PMCID: PMC7223045 DOI: 10.1038/s41429-020-0277-6] [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: 11/08/2019] [Revised: 12/23/2019] [Accepted: 12/27/2019] [Indexed: 12/16/2022]
Abstract
Eight new fasamycin-type polyketides, streptovertimycins A-H (1-8), were isolated from soil-derived Streptomyces morookaense SC1169 cultivated on wheat grains. Their structures were established by extensive spectroscopic analysis and theoretical computations of ECD spectra. Compounds 1-8 have a fasamycin-type pentacyclic structure featuring a 15-O-methyl group. They exhibited potent activity against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecium (VRE) with MIC values in the range of 0.63-5.0 μg/ml. The activity profile provided new insights into the structure-activity relationships of fasamycin-type antibiotics.
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Affiliation(s)
- Li Yang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Lab Building No. 2, CAS, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China.,University of Chinese Academy of Sciences, Yuquanlu 19A, 100049, Beijing, PR China
| | - Xiaoxia Li
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Lab Building No. 2, CAS, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China.,University of Chinese Academy of Sciences, Yuquanlu 19A, 100049, Beijing, PR China
| | - Ping Wu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Lab Building No. 2, CAS, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China. .,South China Branch of Innovation Academy for Drug Discovery and Development, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China.
| | - Jinghua Xue
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Lab Building No. 2, CAS, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China.,South China Branch of Innovation Academy for Drug Discovery and Development, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China
| | - Liangxiong Xu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Lab Building No. 2, CAS, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China.,School of Life Sciences, Huizhou University, Huizhou, 516001, PR China
| | - Hanxiang Li
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Lab Building No. 2, CAS, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China.,South China Branch of Innovation Academy for Drug Discovery and Development, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China
| | - Xiaoyi Wei
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization/Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Lab Building No. 2, CAS, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China. .,South China Branch of Innovation Academy for Drug Discovery and Development, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, PR China.
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20
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Chen X, Gao D, Wang D, Xu T, Liu W, Tian P, Tong X. Access to Aryl‐Naphthaquinone Atropisomers by Phosphine‐Catalyzed Atroposelective (4+2) Annulations of δ‐Acetoxy Allenoates with 2‐Hydroxyquinone Derivatives. Angew Chem Int Ed Engl 2019; 58:15334-15338. [DOI: 10.1002/anie.201908923] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/13/2019] [Indexed: 01/05/2023]
Affiliation(s)
- Xin Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & TechnologySchool of Petrochemical EngineeringChangzhou University 1 Gehu Road Changzhou 213164 China
| | - Dingding Gao
- The Research Center of Chiral DrugsInnovation Research Institute of Traditional Chinese MedicineShanghai University of Traditional Chinese Medicine Shanghai 201203 China
| | - Dong Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & TechnologySchool of Petrochemical EngineeringChangzhou University 1 Gehu Road Changzhou 213164 China
| | - Tong Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & TechnologySchool of Petrochemical EngineeringChangzhou University 1 Gehu Road Changzhou 213164 China
| | - Wei Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & TechnologySchool of Petrochemical EngineeringChangzhou University 1 Gehu Road Changzhou 213164 China
| | - Ping Tian
- The Research Center of Chiral DrugsInnovation Research Institute of Traditional Chinese MedicineShanghai University of Traditional Chinese Medicine Shanghai 201203 China
| | - Xiaofeng Tong
- Jiangsu Key Laboratory of Advanced Catalytic Materials & TechnologySchool of Petrochemical EngineeringChangzhou University 1 Gehu Road Changzhou 213164 China
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21
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Chen X, Gao D, Wang D, Xu T, Liu W, Tian P, Tong X. Access to Aryl‐Naphthaquinone Atropisomers by Phosphine‐Catalyzed Atroposelective (4+2) Annulations of δ‐Acetoxy Allenoates with 2‐Hydroxyquinone Derivatives. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908923] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Xin Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University 1 Gehu Road Changzhou 213164 China
| | - Dingding Gao
- The Research Center of Chiral Drugs Innovation Research Institute of Traditional Chinese Medicine Shanghai University of Traditional Chinese Medicine Shanghai 201203 China
| | - Dong Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University 1 Gehu Road Changzhou 213164 China
| | - Tong Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University 1 Gehu Road Changzhou 213164 China
| | - Wei Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University 1 Gehu Road Changzhou 213164 China
| | - Ping Tian
- The Research Center of Chiral Drugs Innovation Research Institute of Traditional Chinese Medicine Shanghai University of Traditional Chinese Medicine Shanghai 201203 China
| | - Xiaofeng Tong
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University 1 Gehu Road Changzhou 213164 China
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22
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Affiliation(s)
- Shuai Wang
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - George A. Kraus
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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23
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Takikawa H, Nishii A, Sakai T, Suzuki K. Aryne-based strategy in the total synthesis of naturally occurring polycyclic compounds. Chem Soc Rev 2018; 47:8030-8056. [DOI: 10.1039/c8cs00350e] [Citation(s) in RCA: 164] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review has outlined the strategies and tactics of using arynes in the total syntheses of polycyclic natural products.
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Affiliation(s)
- Hiroshi Takikawa
- Graduate School of Pharmaceutical Sciences
- Kyoto University
- Kyoto 606-8501
- Japan
| | - Arata Nishii
- Department of Chemistry
- Tokyo Institute of Technology
- Tokyo 152-8551
- Japan
| | - Takahiro Sakai
- Department of Chemistry
- Tokyo Institute of Technology
- Tokyo 152-8551
- Japan
| | - Keisuke Suzuki
- Department of Chemistry
- Tokyo Institute of Technology
- Tokyo 152-8551
- Japan
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