1
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Dong Q, Yang YH, Lv XJ, Liu JH, Liu YK. Synthesis of 2,3-Dialkyl-5-hydroxybenzofurans via a One-pot, Three-step Reaction Sequence of 2-Monosubstituted 1,3-Diketones and 1,4-Benzoquinones. J Org Chem 2024; 89:7138-7147. [PMID: 38695505 DOI: 10.1021/acs.joc.4c00511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
An economical one-pot, three-step reaction sequence of readily available 2-monosubstituted 1,3-diketones and 1,4-benzoquinones has been explored for the facile access of 2,3-dialkyl-5-hydroxybenzofurans. By using cheap K2CO3 and conc. HCl as the reaction promoters, the reaction occurs smoothly via sequential Michael addition, aromatization, retro-Claisen, deacylation, hemiketalization, and dehydration processes under mild conditions in a practical manner. Additionally, an interesting phenomenon was observed during the derivatization studies, where the dihydroquinoline was converted into tetrahydroquinoline and quinoline products, respectively, via a disproportionation process.
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Affiliation(s)
- Qing Dong
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Yu-Huan Yang
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Xue-Jiao Lv
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Jia-Hui Liu
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Yan-Kai Liu
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
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2
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Synthesis of functionalized flavones from 3-halo-2-(methylthio)-4H-chromen-4-ones. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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Yan Q, Jiang Y, Song X, Lu G, Zhang Q, Du Z, Chan ASC, Zou Y. Synthesis of Phenolic Coumestans via a Sequential Dehydrogenation/Oxa-Michael Addition Reaction of 2',4'-Dihydroxyl-3-arylcoumarins. J Org Chem 2022; 87:5785-5794. [PMID: 35420815 DOI: 10.1021/acs.joc.2c00120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A facile and practical approach for the synthesis of natural coumestans and derivatives starting from 2',4'-dihydroxyl-3-arylcoumarins has been developed. The process involved a seqential intramolecular dehydrogenation/oxa-Micheal reaction efficiently promoted by 1,8-diazabicyclo[5.4.0]undec-7-ene at 40 °C under metal- and ligand-free conditions with good functional group compatibility.
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Affiliation(s)
- Qinfang Yan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Yi Jiang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Xianheng Song
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Guoqing Lu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Qianzhong Zhang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Zhibo Du
- Zhongshan WanHan Pharmaceutical Company, Ltd., Zhongshan 528451, People's Republic of China
| | - Albert S C Chan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China.,Zhongshan WanHan Pharmaceutical Company, Ltd., Zhongshan 528451, People's Republic of China
| | - Yong Zou
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China.,Zhongshan WanHan Pharmaceutical Company, Ltd., Zhongshan 528451, People's Republic of China
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4
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Singh N, Rajotiya K, Lamba N, Singh HL, Ameta KL, Singh S. Versatile approach for the synthesis of furo-coumarin derivatives. CURR ORG CHEM 2022. [DOI: 10.2174/1385272826666220126155703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
Owing to useful physio-chemical properties of furo-coumarin derivatives, their synthetic and mechanistic investigation has been reported here. We have demonstrated a range of synthetic approach to access furan-fused coumarin derivatives. Many metal mediated, base and acid catalyzed approach have been revealed for the construction of thiscoumarin based fused heterocycles of biological importance. In addition to this, microwave assisted synthetic routes have been also revealed. The last and useful approach for the synthesis of these heterocycles includes use of purely solvent as a reaction media for synthesizing these interesting classes of heterocycles.
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Affiliation(s)
- Nidhi Singh
- Department of Chemistry, University of Allahabad, Allahabad, UP, India
| | - Krishna Rajotiya
- Mody University of Science and Technology, Lakshmangarh-Rajasthan 332311, India
| | - Nikita Lamba
- Mody University of Science and Technology, Lakshmangarh-Rajasthan 332311, India
| | - H. L. Singh
- Mody University of Science and Technology, Lakshmangarh-Rajasthan 332311, India
| | - K. L. Ameta
- Mody University of Science and Technology, Lakshmangarh-Rajasthan 332311, India
| | - Shivendra Singh
- Mody University of Science and Technology, Lakshmangarh-Rajasthan 332311, India
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5
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Semwal R, Badhani G, Adimurthy S. Pd-catalyzed annulation of imidazo[1,2- a]pyridines with coumarins and indoles: synthesis of benzofuran and indole fused heterocycles. Chem Commun (Camb) 2022; 58:1585-1588. [PMID: 35018924 DOI: 10.1039/d1cc06803b] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Palladium-catalyzed annulation of imidazo[1,2-a]pyridines with coumarins provided benzofuran fused transannulated products in good to excellent yields via a decarbonylative approach, while imidazo[1,2-a]pyridines with N-methyl indoles in the presence of palladium and base yielded conjugated imidazopyridine fused indole derivatives. Additional experiments revealed that the presence of the phenyl ring at the C-2 position of imidazo[1,2-a]pyridines is essential for the annulation than the alkyl groups. Both transformations follow the ionic mechanism by Pd-catalyzed double C-H bond activation. All the annulated products were shown to exhibit high fluorescence characteristics and their photophysical properties were evaluated.
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Affiliation(s)
- Rashmi Semwal
- Academy of Scientific & Innovative Research, Ghaziabad; CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India.
| | - Gaurav Badhani
- Academy of Scientific & Innovative Research, Ghaziabad; CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India.
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research, Ghaziabad; CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India.
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6
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Shinde VN, Rangan K, Kumar D, Kumar A. Palladium-Catalyzed Weakly Coordinating Lactone-Directed C-H Bond Functionalization of 3-Arylcoumarins: Synthesis of Bioactive Coumestan Derivatives. J Org Chem 2021; 86:9755-9770. [PMID: 34181412 DOI: 10.1021/acs.joc.1c01097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A palladium-catalyzed highly regioselective ortho-selective C-H functionalization of 3-arylcoumarins has been developed. The method utilizes the weakly coordinating lactone as a directing group. The versatility of the strategy is highlighted by developing methodologies for alkenylation, halogenation, fluoroalkoxylation, and hydroxylation. Different functional groups were well tolerated, and functionalized coumarins were obtained in moderate to high yields. The method also showed good selectivity for monofunctionalization versus difunctionalization. The generated ortho-hydroxy derivatives were cyclized in the presence of DDQ, thus developing a simple and fast method for the synthesis of bioactive coumestan from 3-arylcoumarins.
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Affiliation(s)
- Vikki N Shinde
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Krishnan Rangan
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Telangana 500078, India
| | - Dalip Kumar
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Anil Kumar
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India
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7
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Huang D, Wu X. t-BuOK-promoted methylthiolation of aryl fluorides with dimethyldisulfide under transition-metal-free and mild conditions. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2021.109778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Xu C, Wei N, Zhu D, Wang M. Cyclopentene Synthesis by a Catalytic [3+2] Annulation of Donor‐Acceptor Cyclopropanes with Polarized Alkenes. ChemistrySelect 2020. [DOI: 10.1002/slct.202002967] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Cong Xu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry Northeast Normal University 5268 Renmin Street Changchun, 130024 China
| | - Na Wei
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry Northeast Normal University 5268 Renmin Street Changchun, 130024 China
| | - Dongsheng Zhu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry Northeast Normal University 5268 Renmin Street Changchun, 130024 China
| | - Mang Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry Northeast Normal University 5268 Renmin Street Changchun, 130024 China
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9
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Lou J, Wang Q, Wu P, Wang H, Zhou YG, Yu Z. Transition-metal mediated carbon-sulfur bond activation and transformations: an update. Chem Soc Rev 2020; 49:4307-4359. [PMID: 32458881 DOI: 10.1039/c9cs00837c] [Citation(s) in RCA: 130] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Carbon-sulfur bond cross-coupling has become more and more attractive as an alternative protocol to establish carbon-carbon and carbon-heteroatom bonds. Diverse transformations through transition-metal-catalyzed C-S bond activation and cleavage have recently been developed. This review summarizes the advances in transition-metal-catalyzed cross-coupling via carbon-sulfur bond activation and cleavage since late 2012 as an update of the critical review on the same topic published in early 2013 (Chem. Soc. Rev., 2013, 42, 599-621), which is presented by the categories of organosulfur compounds, that is, thioesters, thioethers including heteroaryl, aryl, vinyl, alkyl, and alkynyl sulfides, ketene dithioacetals, sulfoxides including DMSO, sulfones, sulfonyl chlorides, sulfinates, thiocyanates, sulfonium salts, sulfonyl hydrazides, sulfonates, thiophene-based compounds, and C[double bond, length as m-dash]S functionality-bearing compounds such as thioureas, thioamides, and carbon disulfide, as well as the mechanistic insights. An overview of C-S bond cleavage reactions with stoichiometric transition-metal reagents is briefly given. Theoretical studies on the reactivity of carbon-sulfur bonds by DFT calculations are also discussed.
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Affiliation(s)
- Jiang Lou
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China. and University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Quannan Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China. and University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Ping Wu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China. and University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Hongmei Wang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, P. R. China.
| | - Yong-Gui Zhou
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China.
| | - Zhengkun Yu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China. and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, P. R. China
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10
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Song X, Luo X, Sheng J, Li J, Zhu Z, Du Z, Miao H, Yan M, Li M, Zou Y. Copper-catalyzed intramolecular cross dehydrogenative coupling approach to coumestans from 2'-hydroxyl-3-arylcoumarins. RSC Adv 2019; 9:17391-17398. [PMID: 35519854 PMCID: PMC9064580 DOI: 10.1039/c9ra01909j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 05/27/2019] [Indexed: 12/14/2022] Open
Abstract
A copper-catalyzed intramolecular cross dehydrogenative C-O coupling reaction of 2'-hydroxyl-3-arylcoumarins was developed. This protocol provided a facile and efficient strategy for the construction of natural coumestans and derivatives in moderate to high yields. This transformation exhibited good functional group compatibility and was amenable to substrates with free phenolic hydroxyl groups.
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Affiliation(s)
- Xianheng Song
- School of Pharmaceutical Sciences, Sun Yat-sen University Guangzhou 510640 P. R. China
| | - Xiang Luo
- School of Pharmaceutical Sciences, Sun Yat-sen University Guangzhou 510640 P. R. China
| | - Jianfei Sheng
- School of Pharmaceutical Sciences, Sun Yat-sen University Guangzhou 510640 P. R. China
| | - Jianheng Li
- School of Pharmaceutical Sciences, Sun Yat-sen University Guangzhou 510640 P. R. China
| | - Zefeng Zhu
- School of Pharmaceutical Sciences, Sun Yat-sen University Guangzhou 510640 P. R. China
| | - Zhibo Du
- Zhongshan WanHan Pharmceutical Co., Ltd Zhongshan 528451 P. R. China
| | - Hui Miao
- School of Pharmaceutical Sciences, Sun Yat-sen University Guangzhou 510640 P. R. China
| | - Meng Yan
- School of Pharmaceutical Sciences, Sun Yat-sen University Guangzhou 510640 P. R. China
| | - Mingkang Li
- School of Pharmaceutical Sciences, Sun Yat-sen University Guangzhou 510640 P. R. China
| | - Yong Zou
- School of Pharmaceutical Sciences, Sun Yat-sen University Guangzhou 510640 P. R. China
- Zhongshan WanHan Pharmceutical Co., Ltd Zhongshan 528451 P. R. China
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11
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Zhao C, Meng X, Lu R, Xie H, Liu J. Sulfur-containing polymers from terpolymerization of active methylene compounds, carbon disulfide, and dihalohydrocarbons: synthesis and properties. Polym Chem 2019. [DOI: 10.1039/c9py01121h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Sulfur-containing polymers with a high refractive index were synthesized via terpolymerization of active methylene compounds, CS2, and dihalohydrocarbons in excellent yields with high molecular weights.
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Affiliation(s)
- Chen Zhao
- National & Local United Engineering Laboratory for Power Battery
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
| | - Xianghe Meng
- National & Local United Engineering Laboratory for Power Battery
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
| | - Rou Lu
- National & Local United Engineering Laboratory for Power Battery
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
| | - Haiming Xie
- National & Local United Engineering Laboratory for Power Battery
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
| | - Jun Liu
- National & Local United Engineering Laboratory for Power Battery
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
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12
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Xu C, Wang M, Liu Q. Recent Advances in Metal‐Catalyzed Bond‐Forming Reactions of Ketene
S,S
‐Acetals. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801070] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Cong Xu
- National Engineering Laboratory for Druggable Gene and Protein ScreeningSchool of Life SciencesNortheast Normal University Changchun 130024 People's Republic of China
| | - Mang Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & SynthesisFaculty of ChemistryNortheast Normal University Changchun 130024 People's Republic of China
| | - Qun Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & SynthesisFaculty of ChemistryNortheast Normal University Changchun 130024 People's Republic of China
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13
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Wang Q, Liu Z, Lou J, Yu Z. Palladium-Catalyzed C-S Bond Cleavage with Allenoates: Synthesis of Tetrasubstituted 2-Alkenylfuran Derivatives. Org Lett 2018; 20:6007-6011. [PMID: 30256115 DOI: 10.1021/acs.orglett.8b02253] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Palladium-catalyzed C-S cleavage of tetrasubstituted internal alkene α-oxo ketene dithioacetals was realized with allenoates as the coupling partners, efficiently affording tetrasubstituted 2-alkenylfuran derivatives with excellent regioselectivity under mild conditions. Allenoates acted as C1 synthons in the desulfurative [4 + 1] annulation.
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Affiliation(s)
- Quannan Wang
- Dalian Institute of Chemical Physics , Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Zhuqing Liu
- Dalian Institute of Chemical Physics , Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Jiang Lou
- Dalian Institute of Chemical Physics , Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Zhengkun Yu
- Dalian Institute of Chemical Physics , Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China.,State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 354 Fenglin Road , Shanghai 200032 , China
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14
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Kim H, Lee J, Shin H, Sohn JH. Boric Ester and Thiourea as Coupling Partners in a Copper-Mediated Oxidative Dehydrosulfurative Carbon–Oxygen Cross-Coupling Reaction. Org Lett 2018; 20:1961-1965. [DOI: 10.1021/acs.orglett.8b00502] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hyeji Kim
- Department of Chemistry, College of Natural Sciences, Chungnam National University, Dajeon 305-706, Korea
| | - Jihong Lee
- Department of Chemistry, College of Natural Sciences, Chungnam National University, Dajeon 305-706, Korea
| | - Hyunik Shin
- Yonsung Fine Chemicals R&D Center, 602 Innoplex 2, 306 Sinwon-ro, Yeongtong-gu, Suwon 443-380 Korea
| | - Jeong-Hun Sohn
- Department of Chemistry, College of Natural Sciences, Chungnam National University, Dajeon 305-706, Korea
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15
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16
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Cheng HG, Chen H, Liu Y, Zhou Q. The Liebeskind-Srogl Cross-Coupling Reaction and its Synthetic Applications. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201700651] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hong-Gang Cheng
- College of Chemistry and Molecular Sciences; Wuhan University; 430072 Wuhan P. R. China
| | - Han Chen
- College of Chemistry and Molecular Sciences; Wuhan University; 430072 Wuhan P. R. China
| | - Yue Liu
- College of Chemistry and Molecular Sciences; Wuhan University; 430072 Wuhan P. R. China
| | - Qianghui Zhou
- College of Chemistry and Molecular Sciences; Wuhan University; 430072 Wuhan P. R. China
- The Institute for Advanced Studies; Wuhan University; 430072 Wuhan P. R. China
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17
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Yang B, Wang ZX. Transition-Metal-Free Cross-Coupling of Aryl and Heteroaryl Thiols with Arylzinc Reagents. Org Lett 2017; 19:6220-6223. [DOI: 10.1021/acs.orglett.7b03145] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bo Yang
- CAS
Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory
for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhong-Xia Wang
- CAS
Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory
for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
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18
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Kim H, Phan NHT, Shin H, Lee HS, Sohn JH. Dehydrosulfurative arylation with concomitant oxidative dehydrogenation for rapid access to pyrimidine derivatives. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.10.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Li J, Xu C, Wei N, Wang M. Synthesis of 2,2-Difluorinated 4-Isoflavanols/4-Thioisoflavanols via a Base-Catalyzed [4 + 2] Annulation Reaction of gem-Difluoroolefins. J Org Chem 2017; 82:11348-11357. [DOI: 10.1021/acs.joc.7b01635] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiaheng Li
- Jilin
Province Key Laboratory of Organic Functional Molecular Design and
Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Cong Xu
- Jilin
Province Key Laboratory of Organic Functional Molecular Design and
Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Na Wei
- Jilin
Province Key Laboratory of Organic Functional Molecular Design and
Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Mang Wang
- Jilin
Province Key Laboratory of Organic Functional Molecular Design and
Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
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20
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Naik MM, Kamat VP, Tilve SG. Copper-mediated synthesis of coumestans via C(sp 2 )-H functionalization: Protective group free route to coumestrol and 4′- O -methylcoumestrol. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.07.057] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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21
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Neog K, Borah A, Gogoi P. Palladium(II)-Catalyzed C–H Bond Activation/C–C and C–O Bond Formation Reaction Cascade: Direct Synthesis of Coumestans. J Org Chem 2016; 81:11971-11977. [DOI: 10.1021/acs.joc.6b01966] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Kashmiri Neog
- Applied Organic Chemistry
Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Assam Jorhat 785006, India
| | - Ashwini Borah
- Applied Organic Chemistry
Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Assam Jorhat 785006, India
| | - Pranjal Gogoi
- Applied Organic Chemistry
Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Assam Jorhat 785006, India
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22
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Sheng J, Xu T, Zhang E, Zhang X, Wei W, Zou Y. Synthesis of Coumestrol and Aureol. JOURNAL OF NATURAL PRODUCTS 2016; 79:2749-2753. [PMID: 27704859 DOI: 10.1021/acs.jnatprod.6b00510] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A total synthesis of coumestrol (1) and aureol (2) is described. The Perkin condensation of 2-bromo-4-hydroxylphenylacetic acid (6) and o-hydroxybenzaldehydes (7) gave the corresponding 2'-bromo-3-arylcoumarins (9). A copper-catalyzed consecutive hydroxylation and aerobic oxidative coupling of 9 under microwave conditions facilitated the total synthesis of 1 and 2, respectively, with spectroscopic data highly similar to those of natural products.
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Affiliation(s)
- Jianfei Sheng
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, 510006, People's Republic of China
- Zhongshan WanYuan New Drug R&D Co., Ltd. , Zhongshan City, 528451, People's Republic of China
| | - Tianlong Xu
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences , Guangzhou, 510650, People's Republic of China
- Zhongshan WanYuan New Drug R&D Co., Ltd. , Zhongshan City, 528451, People's Republic of China
| | - Ensheng Zhang
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences , Guangzhou, 510650, People's Republic of China
- Zhongshan WanYuan New Drug R&D Co., Ltd. , Zhongshan City, 528451, People's Republic of China
| | - Xuejing Zhang
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, 510006, People's Republic of China
- Zhongshan WanYuan New Drug R&D Co., Ltd. , Zhongshan City, 528451, People's Republic of China
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Sun Yat-sen University , Guangzhou, 510080, People's Republic of China
| | - Wentao Wei
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, 510006, People's Republic of China
- Zhongshan WanYuan New Drug R&D Co., Ltd. , Zhongshan City, 528451, People's Republic of China
| | - Yong Zou
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, 510006, People's Republic of China
- Zhongshan WanYuan New Drug R&D Co., Ltd. , Zhongshan City, 528451, People's Republic of China
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Sun Yat-sen University , Guangzhou, 510080, People's Republic of China
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23
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Nayak M, Jung Y, Kim I. Syntheses of pterocarpenes and coumestans via regioselective cyclodehydration. Org Biomol Chem 2016; 14:8074-87. [PMID: 27503798 DOI: 10.1039/c6ob01451h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A highly efficient synthetic route to pterocarpenes and coumestans is described. BCl3-mediated dehydrative cyclization of 1,3-diaryloxyacetones under mild conditions permitted regioselective ring closure to afford 3-((2-iodoaryloxy)methyl)benzofurans which were converted to the corresponding pterocarpenes by Pd-catalyzed intramolecular direct arylation. The subsequent benzylic oxidation led to coumestans. This sequence was applied to the formal syntheses of coumestrol and the proposed structure of plicadin as well as total syntheses of flemichapparins B and C.
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Affiliation(s)
- Maloy Nayak
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon, 21983, Republic of Korea.
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24
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Chang J, Liu B, Yang Y, Wang M. Pd-Catalyzed C-S Activation/Isocyanide Insertion/Hydrogenation Enables a Selective Aerobic Oxidation/Cyclization. Org Lett 2016; 18:3984-7. [PMID: 27498923 DOI: 10.1021/acs.orglett.6b01780] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Unique imidoylation of thioorganics with isocyanides endows an unprecedented aerobic oxidation process. Catalyzed by Pd(Ph3P)2Cl2 in the presence of Ph3SiH under N2 then upon exposure to air, a wide range of α-acyl ketene dithioacetals react with isocyanides to afford 5-hydroxy-α,β-unsaturated γ-lactams via a C-S bond activation, isocyanide migratory insertion, hydrogenation, selective aerobic oxidation, and intramolecular nucleophilic addition sequence.
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Affiliation(s)
- Jian Chang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Bangyu Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Yang Yang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Mang Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University , Changchun 130024, China.,State Key Laboratory of Fine Chemicals, Dalian University of Technology , Dalian 116024, China
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25
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Baralle A, Yorimitsu H, Osuka A. Pd-NHC-Catalyzed Alkynylation of General Aryl Sulfides with Alkynyl Grignard Reagents. Chemistry 2016; 22:10768-72. [DOI: 10.1002/chem.201602315] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Indexed: 12/30/2022]
Affiliation(s)
- Alexandre Baralle
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Hideki Yorimitsu
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Atsuhiro Osuka
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
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26
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Zhang J, Qiu J, Xiao C, Yu L, Yang F, Tang J. Tandem Demethylation/Annulation/Oxidation of 2,3-Bis(2-methoxyphenyl)-3-oxopropanals for One-Pot Construction of Coumestans. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600122] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jiefeng Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development & Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road 200062 Shanghai P. R. China
| | - Jiakun Qiu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development & Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road 200062 Shanghai P. R. China
| | - Chunmei Xiao
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development & Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road 200062 Shanghai P. R. China
| | - Lifang Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development & Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road 200062 Shanghai P. R. China
| | - Fan Yang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development & Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road 200062 Shanghai P. R. China
| | - Jie Tang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development & Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road 200062 Shanghai P. R. China
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27
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Bhanuchandra M, Baralle A, Otsuka S, Nogi K, Yorimitsu H, Osuka A. Palladium-Catalyzed ipso-Borylation of Aryl Sulfides with Diborons. Org Lett 2016; 18:2966-9. [DOI: 10.1021/acs.orglett.6b01305] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Bhanuchandra
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Alexandre Baralle
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shinya Otsuka
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Keisuke Nogi
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hideki Yorimitsu
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Atsuhiro Osuka
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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28
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Mackey K, Pardo LM, Prendergast AM, Nolan MT, Bateman LM, McGlacken GP. Cyclization of 4-Phenoxy-2-coumarins and 2-Pyrones via a Double C–H Activation. Org Lett 2016; 18:2540-3. [DOI: 10.1021/acs.orglett.6b00751] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Katrina Mackey
- Department of Chemistry and Analytical & Biological Chemistry Research Facility, University College Cork, College Road, Cork, Ireland
| | - Leticia M. Pardo
- Department of Chemistry and Analytical & Biological Chemistry Research Facility, University College Cork, College Road, Cork, Ireland
| | - Aisling M. Prendergast
- Department of Chemistry and Analytical & Biological Chemistry Research Facility, University College Cork, College Road, Cork, Ireland
| | - Marie-T. Nolan
- Department of Chemistry and Analytical & Biological Chemistry Research Facility, University College Cork, College Road, Cork, Ireland
| | - Lorraine M. Bateman
- Department of Chemistry and Analytical & Biological Chemistry Research Facility, University College Cork, College Road, Cork, Ireland
| | - Gerard P. McGlacken
- Department of Chemistry and Analytical & Biological Chemistry Research Facility, University College Cork, College Road, Cork, Ireland
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29
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Gao K, Yorimitsu H, Osuka A. α‐Arylation of Ketimines with Aryl Sulfides at a Low Palladium Catalyst Loading. Angew Chem Int Ed Engl 2016; 55:4573-6. [DOI: 10.1002/anie.201600248] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Ke Gao
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Hideki Yorimitsu
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Atsuhiro Osuka
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
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30
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Gao K, Yorimitsu H, Osuka A. α‐Arylation of Ketimines with Aryl Sulfides at a Low Palladium Catalyst Loading. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600248] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Ke Gao
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Hideki Yorimitsu
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Atsuhiro Osuka
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
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31
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Nolan MT, Pardo LM, Prendergast AM, McGlacken GP. Intramolecular Direct Arylation of 3-Halo-2-pyrones and 2-Coumarins. J Org Chem 2015; 80:10904-13. [DOI: 10.1021/acs.joc.5b02027] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Marie-T. Nolan
- Department of Chemistry and
Analytical and Biological Chemistry Research Facility, University College Cork, College Road, Cork, Ireland
| | - Leticia M. Pardo
- Department of Chemistry and
Analytical and Biological Chemistry Research Facility, University College Cork, College Road, Cork, Ireland
| | - Aisling M. Prendergast
- Department of Chemistry and
Analytical and Biological Chemistry Research Facility, University College Cork, College Road, Cork, Ireland
| | - Gerard P. McGlacken
- Department of Chemistry and
Analytical and Biological Chemistry Research Facility, University College Cork, College Road, Cork, Ireland
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32
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New synthetic approach for the preparation of 2-aryl-thiazolo[4,5-b]pyridines via Liebeskind–Srogl reaction. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2015.05.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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33
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Palladium-Catalyzed Zinc-Amide-Mediated CH Arylation of Fluoroarenes and Heteroarenes with Aryl Sulfides. Chemistry 2015; 21:14703-7. [DOI: 10.1002/chem.201502101] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Indexed: 12/23/2022]
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34
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Liu B, Chang J, Zheng G, Song X, Wang M. Palladium-Catalyzed Desulfurative Carbocyclizations of α-(3-Butenoyl) Ketene Dithioacetals in the Presence of Silanes. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500453] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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35
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Abidi N, Schmink JR. Synthesis of Disubstituted Dithioethers: tert-Butoxide Promoted Elimination/Ring Opening of 1,3-Dithianes Followed by Palladium-Catalyzed C–S Bond Formation. J Org Chem 2015; 80:4123-31. [DOI: 10.1021/acs.joc.5b00547] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nissa Abidi
- Department
of Chemistry, Bryn Mawr College, 101 N. Merion Avenue, Bryn Mawr, Pennsylvania 19010, United States
| | - Jason R. Schmink
- Department
of Chemistry, Bryn Mawr College, 101 N. Merion Avenue, Bryn Mawr, Pennsylvania 19010, United States
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36
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Ming W, Liu X, Wang L, Liu J, Wang M. Tandem Thien- and Benzannulations of α-Alkenoyl-α-alkynyl Ketene Dithioacetals with Cyanoacetates: Synthesis of Functionalized Benzo[b]thiophenes. Org Lett 2015; 17:1746-9. [DOI: 10.1021/acs.orglett.5b00523] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenbo Ming
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Xiaocui Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Lianjie Wang
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Jun Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Mang Wang
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
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37
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Zhu F, Wang ZX. Palladium-Catalyzed Coupling of Azoles or Thiazoles with Aryl Thioethers via C–H/C–S Activation. Org Lett 2015; 17:1601-4. [DOI: 10.1021/acs.orglett.5b00510] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Feng Zhu
- CAS
Key Laboratory of Soft Matter Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhong-Xia Wang
- CAS
Key Laboratory of Soft Matter Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
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38
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Singh S, Srivastava A, Mobin SM, Samanta S. A remarkable solvent effect on the reaction of 4-hydroxycoumarin with (E)-3-aryl-2-nitroprop-2-enol: Facile synthesis of highly substituted furo/pyrano[3,2-c]chromenes. RSC Adv 2015. [DOI: 10.1039/c4ra10610e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The solvent dependent reaction of 4-hydroxycoumarin with (E)-3-aryl-2-nitroprop-2-enol has been reported for the synthesis functionalized furo/pyrano[3,2-c]chromenes in water and DMSO media.
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39
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A new route to the versatile synthesis of thiopyrano[2,3-b:6,5-b′]diindoles via 2-(alkylthio)-indole-3-carbaldehydes. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.08.100] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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40
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Otsuka S, Fujino D, Murakami K, Yorimitsu H, Osuka A. Palladium-Catalyzed Cross-Coupling of Unactivated Aryl Sulfides with Arylzinc Reagents under Mild Conditions. Chemistry 2014; 20:13146-9. [DOI: 10.1002/chem.201404380] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2014] [Indexed: 11/10/2022]
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41
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Xi GL, Liu ZQ. Coumestan inhibits radical-induced oxidation of DNA: is hydroxyl a necessary functional group? JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:5636-5642. [PMID: 24911109 DOI: 10.1021/jf500013v] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Coumestan is a natural tetracycle with a C═C bond shared by a coumarin moiety and a benzofuran moiety. In addition to the function of the hydroxyl group on the antioxidant activity of coumestan, it is worth exploring the influence of the oxygen-abundant scaffold on the antioxidant activity as well. In this work, seven coumestans containing electron-withdrawing and electron-donating groups were synthesized to evaluate the abilities to trap 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonate) cationic radical (ABTS(•+)), 2,2'-diphenyl-1-picrylhydrazyl radical (DPPH), and galvinoxyl radical, respectively, and to inhibit the oxidations of DNA mediated by (•)OH, Cu(2+)/glutathione (GSH), and 2,2'-azobis(2-amidinopropane hydrochloride) (AAPH), respectively. It was found that all of the coumestans used herein can quench the aforementioned radicals and can inhibit (•)OH-, Cu(2+)/GSH-, and AAPH-induced oxidations of DNA. In particular, substituent-free coumestan exhibits higher ability to quench DPPH and to inhibit AAPH-induced oxidation of DNA than Trolox. In addition, nonsubstituted coumestan shows a similar ability to inhibit (•)OH- and Cu(2+)/GSH-induced oxidations of DNA relative to that of Trolox. The antioxidant effectiveness of the coumestan can be attributed to the lactone in the coumarin moiety and, therefore, a hydroxyl group may not be a necessary functional group for coumestan to be an antioxidant.
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Affiliation(s)
- Gao-Lei Xi
- Department of Organic Chemistry, College of Chemistry, Jilin University , Changchun 130021, China
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42
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Gladow D, Reissig HU. Perfluoroalkyl-Substituted Thiophenes and Pyrroles from Donor–Acceptor Cyclopropanes and Heterocumulenes: Synthesis and Exploration of their Reactivity. J Org Chem 2014; 79:4492-502. [DOI: 10.1021/jo500534t] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Daniel Gladow
- Institut für Chemie
und Biochemie, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany
| | - Hans-Ulrich Reissig
- Institut für Chemie
und Biochemie, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany
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43
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Dong Y, Liu B, Chen P, Liu Q, Wang M. Palladium-Catalyzed CS Activation/Aryne Insertion/Coupling Sequence: Synthesis of Functionalized 2-Quinolinones. Angew Chem Int Ed Engl 2014; 53:3442-6. [DOI: 10.1002/anie.201310340] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Indexed: 11/10/2022]
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44
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Dong Y, Liu B, Chen P, Liu Q, Wang M. Palladium-Catalyzed CS Activation/Aryne Insertion/Coupling Sequence: Synthesis of Functionalized 2-Quinolinones. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310340] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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45
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Wei E, Liu B, Lin S, Zhao B, Liang F. Halonium-initiated double oxa-cyclization cascade as a synthetic strategy for halogenated furo[3,2-c]pyran-4-ones. Org Biomol Chem 2013; 11:7212-7. [DOI: 10.1039/c3ob41526k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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