1
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Mahapatra D, Sau A, Ghosh T, Roy A, Kundu S. Co(II)-Catalyzed Additive-Free Transfer Hydrogenation of N-Heteroarenes at Room Temperature. Org Lett 2024. [PMID: 38976355 DOI: 10.1021/acs.orglett.4c02090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Traditional catalyst development relies on multistep synthesis and isolation of ligand and precatalyst. Designing a catalytic system that can be assembled in situ from easily accessible starting materials can decrease the reaction complexity and enhance the synthetic utility. Herein, we report an inexpensive and commercially available CoBr2·H2O/terpyridine-catalyzed effective and straightforward transfer hydrogenation (TH) protocol for N-heteroarenes, utilizing NH3·BH3 (AB) under ambient conditions. Synthesis of diverse substrates and bioactive molecules demonstrated a practical applicability. Control experiments and DFT studies elucidate the mechanism.
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Affiliation(s)
- Divya Mahapatra
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Anirban Sau
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Tanmoy Ghosh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Arkamitra Roy
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Sabuj Kundu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
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2
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Li P, Shi M, Yang K, Jing T, Kang Z, Hu W, Qian Y. Diastereoselective Synthesis of 4-Hydroxy-2-quinolinones via Formal [2 + 4] Cycloaddition Reactions Using α-Diazo Pyrazoleamides as C2 Synthons. Org Lett 2024; 26:5554-5559. [PMID: 38912750 DOI: 10.1021/acs.orglett.4c01956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2024]
Abstract
A rhodium-catalyzed highly stereoselective formal [2 + 4]-cycloaddition reaction of α-diazo pyrazoleamides and 2-aminophenyl ketones that produces 4-hydroxy-2-quinolinones in good yields with excellent diastereoselectivities has been developed. A pyrazolium ylide species that is generated from α-diazo pyrazoleamides is used as a C2 synthon for this cycloaddition. This protocol offers an efficient approach to a variety of 4-hydroxy-2-quinolinones featuring sequential quaternary centers.
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Affiliation(s)
- Pei Li
- State Key Laboratory of Anti-Infective Drug Discovery and Development, Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Maoqing Shi
- State Key Laboratory of Anti-Infective Drug Discovery and Development, Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Kaixin Yang
- State Key Laboratory of Anti-Infective Drug Discovery and Development, Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Tongfei Jing
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
| | - Zhenghui Kang
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
| | - Wenhao Hu
- State Key Laboratory of Anti-Infective Drug Discovery and Development, Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Yu Qian
- State Key Laboratory of Anti-Infective Drug Discovery and Development, Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
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3
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Hanessian S. My 50-Plus Years of Academic Research Collaborations with Industry. A Retrospective. J Org Chem 2024; 89:9147-9186. [PMID: 38865159 DOI: 10.1021/acs.joc.4c00652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
A retrospective is presented highlighting the synthesis of selected "first-in-kind" natural products, their synthetic analogues, structure elucidations, and rationally designed bioactive synthetic compounds that were accomplished because of collaborations with past and present pharmaceutical and agrochemical companies. Medicinal chemistry projects involving structure-based design exploiting cocrystal structures of small molecules with biologically relevant enzymes, receptors, and bacterial ribosomes with synthetic small molecules leading to marketed products, clinical candidates, and novel drug prototypes were realized in collaboration. Personal reflections, historical insights, behind the scenes stories from various long-term projects are shared in this retrospective article.
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Affiliation(s)
- Stephen Hanessian
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Succ. Centre-ville, Montréal, Québec, Canada H3C 3J7
- Department of Pharmaceutical Sciences, University of California, Irvine, California 91266, United States
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4
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Sau A, Mahapatra D, Maji A, Dey S, Roy A, Kundu S. Methyl Formate, an Alternative Transfer Hydrogenating Agent for Chemoselective Reduction of N-Heteroarenes and Azoarenes. Org Lett 2024; 26:4486-4491. [PMID: 38770879 DOI: 10.1021/acs.orglett.4c01293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
The search for efficient molecular hydrogen precursors and their catalytic exploration is necessary for the evolution of catalytic transfer hydrogenation. Methyl formate (MF) having high hydrogen content still remains unexplored for such transformations. Herein, we disclosed a bifunctional Ir(III)-complex catalyzed chemoselective TH protocol for N-heteroarenes and azoarenes using MF. A variety of substrates including ten bioactive molecules have been synthesized under mild reaction conditions. A probable mechanistic pathway was proposed based on control experiments and mechanistic studies.
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Affiliation(s)
- Anirban Sau
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Divya Mahapatra
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Ankur Maji
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Sadhan Dey
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Arkamitra Roy
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Sabuj Kundu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
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5
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Khadem S, Marles RJ. Natural 3,4-Dihydro-2(1 H)-quinolinones - part III: biological activities. Nat Prod Res 2024:1-8. [PMID: 38795182 DOI: 10.1080/14786419.2024.2357663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 05/14/2024] [Indexed: 05/27/2024]
Abstract
Natural products have played a crucial role in drug discovery, but their development is hindered by challenges such as inadequate availability and complex synthesis methods. However, both natural and synthetic compounds that have the core structure of 3,4-dihydro-2(1H)-quinolinone, also known as 2-oxo-1,2,3,4-tetrahydroquinoline (2O-THQ), display a diverse array of effects in both central and peripheral tissues, with some showing therapeutic potential in treating various disorders. Despite the significance of this family of compounds, the current literature lacks comprehensive coverage of their biological functions. This article aims to address this gap by extensively reviewing the biological activities of 2O-THQ alkaloids from diverse organisms and exploring their potential to serve as a source of innovative bioactive natural products.
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Affiliation(s)
- Shahriar Khadem
- Safe Environments Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, Canada
| | - Robin J Marles
- Retired Senior Scientific Advisor, Health Canada, Ottawa, Canada
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6
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Guo FW, Gao Y, Gu YC, Shao CL. Scalable total synthesis of aflaquinolone I and confirmation of the absolute configuration. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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7
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Gadali KE, Rafya M, Mansouri AEE, Maatallah M, Van-derlee A, Mehdi A, Ouahrouch A, Benkhalti F, Sanghvi YS, Taourirte M, Lazrek HB. Synthesis, structural characterization and antibacterial activity evaluation of novel quinolone-1,2,3-triazole-benzimidazole hybrids. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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8
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Wang S, Zhang J, Wang JS, Ying J, Wu XF. Palladium-Catalyzed Cascade Carbonylative Synthesis of Perfluoroalkyl and Carbonyl-Containing 3,4-Dihydroquinolin-2(1 H)-one Derivatives. Org Lett 2022; 24:8843-8847. [DOI: 10.1021/acs.orglett.2c03636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Shangyuan Wang
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jiangjie Zhang
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jian-Shu Wang
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jun Ying
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Xiao-Feng Wu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, Liaoning, China
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straβe 29a, 18059 Rostock, Germany
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9
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Buljan A, Roje M. Application of Green Chiral Chromatography in Enantioseparation of Newly Synthesized Racemic Marinoepoxides. Mar Drugs 2022; 20:md20080530. [PMID: 36005533 PMCID: PMC9409916 DOI: 10.3390/md20080530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/13/2022] [Accepted: 08/14/2022] [Indexed: 11/16/2022] Open
Abstract
Enantioseparation of the newly synthesized series of novel quinoline-2(1H)-one epoxide structures rac-6a-c and rac-8a-c, named marinoepoxides, is described. Marinoepoxide rac-6a, the key intermediate in the total synthesis of natural products marinoaziridines A and B, as well as their structural analogues, was synthesized by addition of the achiral ylide generated in situ from the sulfonium salt 5 or 7, to the carbon-oxygen double bond of the corresponding quinoline-2(1H)-one-4-carbaldehyde 4a-c in good yield. Separation of enantiomers of (±)-2,3,3-trisubstituted marinoepoxides rac-6a-c and (±)-trans-2,3-disubstituted marinoepoxides rac-8a-c was studied using two immobilized polysaccharide type chiral stationary phases (CSPs); tris-(3,5-dichlorophenylcarbamoyl)cellulose stationary phase (CHIRAL ART Cellulose-SC) and tris-(3,5-dimethylphenylcarbamoyl)amylose stationary phase (CHIRAL ART Amylose-SA). Enantioseparation conditions were explored by high-performance liquid chromatography (HPLC) using dimethyl carbonate/alcohol mixtures and n-hexane/ethanol (80/20, v/v) as mobile phase, and by supercritical fluid chromatography (SFC) using CO2/alcohol mixtures as mobile phase. In all examined racemates, enantioseparation was successfully achieved, but its efficiency largely depended on the structure of chiral selector and type/composition of the mobile phase.
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Affiliation(s)
| | - Marin Roje
- Correspondence: ; Tel.: +385-1-45-71-283
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10
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Shi P, Tu Y, Kong D, Wu P, Ma D, Bolm C. Iron‐Catalyzed Intramolecular Arene C(sp
2
)−H Amidations under Mechanochemical Conditions. Angew Chem Int Ed Engl 2022; 61:e202204874. [PMID: 35511087 PMCID: PMC9401578 DOI: 10.1002/anie.202204874] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Indexed: 02/06/2023]
Abstract
In a ball mill, FeBr3‐catalyzed intramolecular amidations lead to 3,4‐dihydro‐2(1H)‐quinolinones in good to almost quantitative yields. The reactions do not require a solvent and are easy to perform. No additional ligand is needed for the iron catalyst. Both 4‐substituted aryl and β‐substituted dioxazolones provide products with high selectivity. Mechanistically, an electrophilic spirocyclization followed by C−C migration explains the formation of rearranged products.
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Affiliation(s)
- Peng Shi
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Yongliang Tu
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Deshen Kong
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Peng Wu
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Ding Ma
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Carsten Bolm
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
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11
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Singh J, Patel RI, Sharma A. Visible‐Light‐Mediated C‐2 Functionalization and Deoxygenative Strategies in Heterocyclic
N
‐Oxides. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jitender Singh
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247667 India
| | - Roshan I. Patel
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247667 India
| | - Anuj Sharma
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247667 India
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12
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Shi P, Tu Y, Kong D, Wu P, Ma D, Bolm C. Iron‐Catalyzed Intramolecular Arene C(sp
2
)−H Amidations under Mechanochemical Conditions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202204874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Peng Shi
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Yongliang Tu
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Deshen Kong
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Peng Wu
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Ding Ma
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Carsten Bolm
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Germany
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13
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Zhu Y, Ying J, Wu XF. Cobalt-catalyzed carbonylative cyclization of N-(2-Vinylphenyl)nicotinamides to access (NH)-quinolin-2(1H)-ones. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Guo FW, Mou XF, Qu Y, Wei MY, Chen GY, Wang CY, Gu YC, Shao CL. Scalable total synthesis of (+)-aniduquinolone A and its acid-catalyzed rearrangement to aflaquinolones. Commun Chem 2022; 5:35. [PMID: 36697782 PMCID: PMC9814574 DOI: 10.1038/s42004-022-00655-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 02/21/2022] [Indexed: 01/28/2023] Open
Abstract
The strong antibacterial, antiviral and anticancer activities demonstrated by quinolones make them promising lead structures and important synthetic targets for drug discovery. Here, we report, to the best of our knowledge, the first scalable total synthesis of antiviral (+)-aniduquinolone A, possessing a 3,4-dioxygenated 5-hydroxy-4-aryl-quinolin-2(1H)-one skeleton. This synthetic strategy explores E-stereoselective Horner-Wadsworth-Emmons (HWE) olefination as the key step to assemble isopropenyl substituted tetrahydrofuran onto the 3,4-dioxygenated 5-hydroxy-4-aryl-quinolin-2(1H)-one core, which is built by highly diastereoselective intramolecular aldol reaction. Moreover, two sets of stereoisomers of aniduquinolone A with substantially overlapping NMR data were synthesized completely and assigned unambiguously by comprehensive analysis of both their spectroscopic and X-ray diffraction data. Unexpectedly, aflaquinolones A, C, and D that feature different 2,4-dimethyl cyclohexanone moieties were transformed successfully from (+)-aniduquinolone A by treating with TFA. The methodology delineated herein can be applied broadly to the synthesis of natural alkaloids containing the core structure of 3,4-dioxygenated 5-hydroxy-4-aryl-quinolin-2(1H)-one.
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Affiliation(s)
- Feng-Wei Guo
- grid.4422.00000 0001 2152 3263Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China ,grid.484590.40000 0004 5998 3072Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266200 China
| | - Xiao-Feng Mou
- grid.4422.00000 0001 2152 3263Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China ,grid.440761.00000 0000 9030 0162School of Pharmacy, Yantai University, Yantai, 264005 China
| | - Yong Qu
- grid.4422.00000 0001 2152 3263Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China ,grid.484590.40000 0004 5998 3072Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266200 China
| | - Mei-Yan Wei
- grid.4422.00000 0001 2152 3263Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China
| | - Guang-Ying Chen
- grid.440732.60000 0000 8551 5345College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158 China
| | - Chang-Yun Wang
- grid.4422.00000 0001 2152 3263Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China ,grid.484590.40000 0004 5998 3072Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266200 China
| | - Yu-Cheng Gu
- grid.426114.40000 0000 9974 7390Syngenta Jealott’s Hill International Research Centre, Bracknell, Berkshire RG42 6EY UK
| | - Chang-Lun Shao
- grid.4422.00000 0001 2152 3263Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003 China ,grid.484590.40000 0004 5998 3072Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266200 China
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15
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Shou J, Feng G, He JY, Bai QF, Li X. Photoredox One-Pot Synthesis of 3,4-Dihydroquinolin-2(1H)-ones. Synlett 2022. [DOI: 10.1055/s-0041-1737910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractA photoredox one-pot strategy for efficient accessing 3,4-dihydroquinolin-2(1H)-ones from anilines, oxalyl chloride, and electron-deficient alkenes is disclosed. The new approach features excellent synthetic efficiency, readily available starting materials, and simple operations. It is compatible with a variety of anilines and electron-deficient alkenes. A broad array of 3,4-dihydroquinolin-2(1H)-ones were prepared.
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Affiliation(s)
- Jianxin Shou
- Office of Science and Technology, Shaoxing University
| | - Gaofeng Feng
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University
| | - Jing-Yao He
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University
| | - Qi-Fan Bai
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University
| | - Xuewen Li
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University
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16
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Guo Y, Contesini FJ, Wang X, Ghidinelli S, Tornby DS, Andersen TE, Mortensen UH, Larsen TO. Biosynthesis of Calipyridone A Represents a Fungal 2-Pyridone Formation without Ring Expansion in Aspergillus californicus. Org Lett 2022; 24:804-808. [PMID: 35045257 DOI: 10.1021/acs.orglett.1c03792] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A chemical investigation of the filamentous fungus Aspergillus californicus led to the isolation of a polyketide-nonribosomal peptide hybrid, calipyridone A (1). A putative biosynthetic gene cluster cpd for production of 1 was next identified by genome mining. The role of the cpd cluster in the production of 1 was confirmed by multiple gene deletion experiments in the host strain as well as by heterologous expression of the hybrid gene cpdA inAspergillus oryzae. Moreover, chemical analyses of the mutant strains allowed the biosynthesis of 1 to be elucidated. The results indicate that the generation of the 2-pyridone moiety of 1 via nucleophilic attack of the iminol nitrogen to the carbonyl carbon is different from the biosynthesis of other fungal 2-pyridone products through P450-catalyzed tetramic acid ring expansions. In addition, two biogenetic intermediates, calipyridones B and C, showed modest inhibition effects on the plaque-forming ability of SARS-CoV-2.
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Affiliation(s)
- Yaojie Guo
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, 2800 Kongens Lyngby, Denmark.,Department of Microbiology, Zhejiang University School of Medicine, Yuhangtang Road 866, Hangzhou 310058, China
| | - Fabiano J Contesini
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, 2800 Kongens Lyngby, Denmark
| | - Xinhui Wang
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, 2800 Kongens Lyngby, Denmark
| | - Simone Ghidinelli
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Ditte S Tornby
- Department of Clinical Research, University of Southern Denmark, Winløwsparken 21, 2. sal, 5000 Odense, Denmark
| | - Thomas E Andersen
- Department of Clinical Research, University of Southern Denmark, Winløwsparken 21, 2. sal, 5000 Odense, Denmark
| | - Uffe H Mortensen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, 2800 Kongens Lyngby, Denmark
| | - Thomas O Larsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, 2800 Kongens Lyngby, Denmark
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17
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Yang ML, Pan HL, Kong HH, Ding MW. One-pot and divergent synthesis of polysubstituted quinolin-2(1 H)-ones and oxireno[2,3- c]quinolin-2(1a H,3 H,7b H)-ones via sequential Ugi/Knoevenagel condensation/hydrolysis and Ugi/Corey–Chaykovsky epoxidation reactions. Org Chem Front 2022. [DOI: 10.1039/d2qo01130a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new one-pot and divergent synthesis of multisubstituted quinolin-2(1H)-ones and oxireno[2,3-c]quinolin-2(1aH,3H,7bH)-ones was developed.
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Affiliation(s)
- Mao-Lin Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Central China Normal University, Wuhan 430079, P. R. China
| | - Hong-Ling Pan
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Central China Normal University, Wuhan 430079, P. R. China
| | - Han-Han Kong
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Central China Normal University, Wuhan 430079, P. R. China
| | - Ming-Wu Ding
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Central China Normal University, Wuhan 430079, P. R. China
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18
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Ramirez M, Vece V, Hanessian S, Houk KN. Computational and Further Experimental Explorations of the Competing Cascades Following Claisen Rearrangements of Aryl Propargyl Ethers: Substituent Effects on Reactivity and Regioselectivity. J Org Chem 2021; 86:17955-17964. [PMID: 34846894 DOI: 10.1021/acs.joc.1c02296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a computational investigation of two reaction cascades occurring following the Claisen rearrangements of aryl propargyl ethers to the alternate ortho positions in unsymmetrical reactants. Our computations explain how substituents influence reactivity and regioselectivity. Rearrangement to the substituted ortho carbon leads to a tricyclo[3.2.1.0]octane core, while rearrangement to an unsubstituted ortho carbon leads to a benzopyran. Density functional theory with ωB97X-D indicates that these reactions involve rate-determining Claisen rearrangements followed by subsequent reaction cascades of the Claisen rearrangement products depending on the presence or absence of a substituent at the ortho carbon.
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Affiliation(s)
- Melissa Ramirez
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Vito Vece
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Centre-Ville, Montréal, Québec, Canada, H3C3J7
| | - Stephen Hanessian
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Centre-Ville, Montréal, Québec, Canada, H3C3J7
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
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19
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Yan H, Jia SK, Geng YH, Han JJ, Hua YZ, Wang MC. Dinuclear zinc-catalyzed asymmetric Friedel-Crafts alkylation/cyclization of 3-aminophenols with α,α-dicyanoolefins. Chem Commun (Camb) 2021; 57:9854-9857. [PMID: 34490871 DOI: 10.1039/d1cc04177k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
An enantioselective Friedel-Crafts alkylation/cyclization tandem reaction of 3-aminophenols with α,α-dicyanoolefins has been performed successfully using a chiral dinuclear zinc catalyst, leading to a range of chiral 2-amino-4H-chromenes (up to 98% yield and >99% ee). To the best of our knowledge, this is the first asymmetric example of the dinuclear zinc-catalysed functionalization of aromatic C(sp2)-H bonds.
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Affiliation(s)
- Hang Yan
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Shi-Kun Jia
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Yu-Huan Geng
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Jiao-Jiao Han
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Yuan-Zhao Hua
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Min-Can Wang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
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20
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Kinetic Resolution of
2‐Substituted
1,
2‐Dihydroquinolines
by
Rhodium‐Catalyzed
Asymmetric Hydroarylation
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000742] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Jia WL, Ces SV, Fernández-Ibáñez MÁ. Divergent Total Syntheses of Yaequinolone-Related Natural Products by Late-Stage C-H Olefination. J Org Chem 2021; 86:6259-6277. [PMID: 33886329 PMCID: PMC8154619 DOI: 10.1021/acs.joc.1c00042] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Divergent total syntheses of 10 yaequinolone-related natural products have been achieved for the first time by late-stage C-H olefination of 3,4-dioxygenated 4-aryl-5-hydroxyquinolin-2(1H)-ones, core structures of this family of natural products. A robust synthetic methodology to construct the core structures has been established, and the C-H olefination reaction has been carried out with synthetically useful yields and high levels of site-selectivity under mild reaction conditions in the presence of a Pd/S,O-ligand catalyst.
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Affiliation(s)
- Wen-Liang Jia
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Sabela Vega Ces
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - M Ángeles Fernández-Ibáñez
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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22
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Sun W, Ling CH, Au CM, Yu WY. Ruthenium-Catalyzed Intramolecular Arene C(sp 2)-H Amidation for Synthesis of 3,4-Dihydroquinolin-2(1 H)-ones. Org Lett 2021; 23:3310-3314. [PMID: 33900093 DOI: 10.1021/acs.orglett.1c00781] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the [Ru(p-cymene)(l-proline)Cl] ([Ru1])-catalyzed cyclization of 1,4,2-dioxazol-5-ones to form dihydroquinoline-2-ones in excellent yields with excellent regioselectivity via a formal intramolecular arene C(sp2)-H amidation. The reactions of the 2- and 4-substituted aryl dioxazolones proceeds initially through spirolactamization via electrophilic amidation at the arene site, which is para or ortho to the substituent. A Hammett correlation study showed that the spirolactamization is likely to occur by electrophilic nitrenoid attack at the arene, which is characterized by a negative ρ value of -0.73.
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Affiliation(s)
- Wenlong Sun
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Cho-Hon Ling
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Chi-Ming Au
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Wing-Yiu Yu
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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23
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Dai C, Li X, Zhang K, Li XN, Wang W, Zang Y, Chen X, Li Q, Wei M, Chen C, Zhu H, Zhang Y. Pesimquinolones I-S, eleven new quinolone alkaloids produced by Penicillium simplicissimum and their inhibitory activity on NO production. Bioorg Chem 2021; 108:104635. [PMID: 33484940 DOI: 10.1016/j.bioorg.2021.104635] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 01/04/2021] [Accepted: 01/04/2021] [Indexed: 11/17/2022]
Abstract
Eleven undescribed quinolone alkaloids, pesimquinolones I-S (1-4 and 6-12), as well as eleven known congeners (5 and 13-22), were isolated from the solid culture broth of the fungus Penicillium simplicissimum. Their chemical structures with absolute configurations were established by a combination of NMR spectroscopy, single-crystal X-ray crystallography, and modified Mosher's methods. Pesimquinolones I-K (1-3) represent the first examples of natural occurring quinolone alkaloids that possess a 6/6/6/6 tetracyclic ring system. The anti-inflammatory activities of selected compounds on LPS-induced nitric oxide (NO) production in adherent cells were evaluated. Compounds 1 and 2 showed suppressive effects on the production of NO, with IC50 values of 10.13 and 8.10 μM, respectively.
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Affiliation(s)
- Chong Dai
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Xiaoxin Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Kailin Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China; Hubei Hualong Bio-Chemical Pharmaceutical Limited Company, Xiaogan 432800, People's Republic of China
| | - Xiao-Nian Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
| | - Wenjing Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Yi Zang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Xia Chen
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Qin Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Mengsha Wei
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Chunmei Chen
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Hucheng Zhu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China.
| | - Yonghui Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China.
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24
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Szymor-Pietrzak D, Khan MN, Pagès A, Kumar A, Depner N, Clive DLJ. Formation of 3-Aminophenols from Cyclohexane-1,3-diones. J Org Chem 2021; 86:619-631. [PMID: 33274938 DOI: 10.1021/acs.joc.0c02284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
meta-Aminophenols are formed by the action of DBU on 3-amino-2-chlorocyclohex-2-en-1-ones at room temperature in MeCN. The chloro compounds are generated by treating 3-aminocyclohex-2-en-1-ones with the easily prepared halogenating agent BnNMe3·ICl2 in MeOH-CH2Cl2. The amino group must carry two substituents, either two aryl, one aryl and one alkyl, or two alkyl groups; 3-aminocyclohex-2-en-1-ones of this type are readily made from cyclohex-2-en-1-one and a primary or secondary amine.
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Affiliation(s)
- Damian Szymor-Pietrzak
- Undergraduate research participant, Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Muhammad N Khan
- Visiting Scholar from the Chemistry Department, COMSATS University, Islamabad, Abbottabad Campus, Abbottabad 22010, Pakistan
| | - Anaïs Pagès
- Research Intern from Ecole Nationale Supérieure d'Ingénieurs de Caen, Caen 14050, France
| | - Ajay Kumar
- Visiting Scholar from the Chemistry Department, Indian Institute of Technology (IIT), Gandhinagar 382355, India
| | - Noah Depner
- Undergraduate research participant, Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Derrick L J Clive
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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25
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Dai C, Chen C, Guan D, Chen H, Wang F, Wang W, Zang Y, Li Q, Wei M, Li X, Zhang X, Wang J, Zhou Q, Zhu H, Zhang Y. Pesimquinolones produced by Penicillium simplicissimum and their inhibitory activity on nitric oxide production. PHYTOCHEMISTRY 2020; 174:112327. [PMID: 32222549 DOI: 10.1016/j.phytochem.2020.112327] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 02/19/2020] [Accepted: 02/20/2020] [Indexed: 06/10/2023]
Abstract
Eight undescribed quinolone alkaloids, pesimquinolones A-H, as well as six known compounds, were isolated from the solid culture broth of the fungus Penicillium simplicissimum. Their chemical structures were characterized by combined analyses of NMR spectroscopy and single-crystal X-ray crystallography. Pesimquinolones A-G are the first examples of naturally occurring quinolone alkaloids possessing a limonene moiety. Their anti-inflammatory activities on LPS-induced nitric oxide (NO) production in adherent cells were evaluated. Pesimquinolones A, E, G, and H showed promising suppressive effect on the production of NO with IC50 values of 1.94, 1.29, 1.20, and 1.23 μM, respectively.
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Affiliation(s)
- Chong Dai
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Chunmei Chen
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Danyingzi Guan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Hailun Chen
- Faculty of Medicine, Dentistry and Health, University of Sheffield, South Yorkshire, Sheffield, United Kingdom
| | - Fuxin Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Wenjing Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yi Zang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Qin Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Mengsha Wei
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiaoxin Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiaotian Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Jianping Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Qun Zhou
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
| | - Hucheng Zhu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
| | - Yonghui Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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26
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Bhattacharya D, Tomar R, Babu SA. Conversion of 2,3‐Dihydrobenzo[
b
][1,4]dioxine‐2‐carboxamides to 3‐Oxoquinolin‐2(1
H
)‐ones via Ring‐Opening and Formal 6‐
endo
‐trig Cyclization‐Involved Heck Reactions. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000096] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Debabrata Bhattacharya
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306 (India)
| | - Radha Tomar
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306 (India)
| | - Srinivasarao Arulananda Babu
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306 (India)
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27
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Xu-Xu QF, Zhang X, You SL. Enantioselective Synthesis of 4-Allyl Tetrahydroquinolines via Copper(I) Hydride-Catalyzed Hydroallylation of 1,2-Dihydroquinolines. Org Lett 2020; 22:1530-1534. [PMID: 32009411 DOI: 10.1021/acs.orglett.0c00113] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
CuCl/(R,R)-Ph-BPE-catalyzed asymmetric hydroallylation of 1,2-dihydroquinolines, prepared from readily available quinolines, was developed. The optically active tetrahydroquinolines (THQs) bearing an allylic functionality at position 4 were obtained in good yields and excellent enantioselectivity. The introduced allylic groups are amenable to diverse transformations, thus offering chances to rapidly expand the THQ libraries.
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Affiliation(s)
- Qing-Feng Xu-Xu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Xiao Zhang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
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28
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Trinh KH, Tran PH, Nguyen TT, Doan SH, Le M, Nguyen TT, Phan NT. Direct oxidative C(sp
3
)─H/C(sp
2
)─H coupling reaction using recyclable Sr‐doped LaCoO
3
perovskite catalyst. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5515] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Khang H. Trinh
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Phuong H. Tran
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Thanh T. Nguyen
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Son H. Doan
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Minh‐Vien Le
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Tung T. Nguyen
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
| | - Nam T.S. Phan
- Faculty of Chemical EngineeringHCMC University of Technology VNU‐HCM, 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
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29
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Schwan J, Kleoff M, Heretsch P, Christmann M. Five-Step Synthesis of Yaequinolones J1 and J2. Org Lett 2020; 22:675-678. [PMID: 31909626 DOI: 10.1021/acs.orglett.9b04455] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A concise synthesis of yaequinolones J1 and J2 is reported. The route is based on the aryne insertion into the σ-C-N bond of an unsymmetric imide followed by a diastereoselective aldol cyclization of the resulting N-acylated aminobenzophenone. The chromene motif is generated in the first step by an organocatalytic tandem Knoevenagel electrocyclization of citral and 2-bromoresorcinol. The approach adheres to the ideality principle, using almost exclusively strategic bond-forming reactions.
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Affiliation(s)
- Johannes Schwan
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Merlin Kleoff
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Philipp Heretsch
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Mathias Christmann
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
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30
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Yasui K, Kamitani M, Tobisu M. N‐Heterocyclic Carbene Catalyzed Concerted Nucleophilic Aromatic Substitution of Aryl Fluorides Bearing α,β‐Unsaturated Amides. Angew Chem Int Ed Engl 2019; 58:14157-14161. [DOI: 10.1002/anie.201907837] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/23/2019] [Indexed: 02/05/2023]
Affiliation(s)
- Kosuke Yasui
- Department of Applied Chemistry Graduate School of Engineering Osaka University Suita Osaka 565-0871 Japan
| | - Miharu Kamitani
- Department of Applied Chemistry Graduate School of Engineering Osaka University Suita Osaka 565-0871 Japan
| | - Mamoru Tobisu
- Department of Applied Chemistry Graduate School of Engineering Osaka University Suita Osaka 565-0871 Japan
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31
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Yasui K, Kamitani M, Tobisu M. N‐Heterocyclic Carbene Catalyzed Concerted Nucleophilic Aromatic Substitution of Aryl Fluorides Bearing α,β‐Unsaturated Amides. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907837] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kosuke Yasui
- Department of Applied Chemistry Graduate School of Engineering Osaka University Suita Osaka 565-0871 Japan
| | - Miharu Kamitani
- Department of Applied Chemistry Graduate School of Engineering Osaka University Suita Osaka 565-0871 Japan
| | - Mamoru Tobisu
- Department of Applied Chemistry Graduate School of Engineering Osaka University Suita Osaka 565-0871 Japan
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32
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Visagie CM, Yilmaz N, Vanderwolf K, Renaud JB, Sumarah MW, Houbraken J, Assebgui R, Seifert KA, Malloch D. Penicillium diversity in Canadian bat caves, including a new species, P. speluncae. Fungal Syst Evol 2019; 5:1-15. [PMID: 32467912 PMCID: PMC7250010 DOI: 10.3114/fuse.2020.05.01] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Penicillium species were commonly isolated during a fungal survey of bat hibernacula in New Brunswick and Quebec, Canada. Strains were isolated from arthropods, bats, rodents (i.e. the deer mouse Peromyscus maniculatus), their dung, and cave walls. Hundreds of fungal strains were recovered, of which Penicillium represented a major component of the community. Penicillium strains were grouped by colony characters on Blakeslee's malt extract agar. DNA sequencing of the secondary identification marker, beta-tubulin, was done for representative strains from each group. In some cases, ITS and calmodulin were sequenced to confirm identifications. In total, 13 species were identified, while eight strains consistently resolved into a unique clade with P. discolor, P. echinulatum and P. solitum as its closest relatives. Penicillium speluncae is described using macroand micromorphological characters, multigene phylogenies (including ITS, beta-tubulin, calmodulin and RNA polymerase II second largest subunit) and extrolite profiles. Major extrolites produced by the new species include cyclopenins, viridicatins, chaetoglobosins, and a microheterogenous series of cyclic and linear tetrapeptides.
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Affiliation(s)
- C M Visagie
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Faculty of Natural and Agricultural Sciences, University of Pretoria, P. Bag X20, Hatfield 0028, Pretoria, South Africa
| | - N Yilmaz
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Faculty of Natural and Agricultural Sciences, University of Pretoria, P. Bag X20, Hatfield 0028, Pretoria, South Africa
| | - K Vanderwolf
- New Brunswick Museum, 277 Douglas Avenue, Saint John, New Brunswick, E2K 1E5, Canada
| | - J B Renaud
- London Research & Development Centre, Agriculture & Agri-Food Canada, London, Ontario, N5V 4T3, Canada
| | - M W Sumarah
- London Research & Development Centre, Agriculture & Agri-Food Canada, London, Ontario, N5V 4T3, Canada
| | - J Houbraken
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, Utrecht, 3584 CT, Netherlands
| | - R Assebgui
- Biodiversity (Mycology), Eastern Cereal and Oilseed Research Centre, 960 Carling Ave., Ottawa, Ontario, K1A 0C6, Canada
| | - K A Seifert
- Biodiversity (Mycology), Eastern Cereal and Oilseed Research Centre, 960 Carling Ave., Ottawa, Ontario, K1A 0C6, Canada
| | - D Malloch
- New Brunswick Museum, 277 Douglas Avenue, Saint John, New Brunswick, E2K 1E5, Canada
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33
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Wu C, Liao J, Ge S. Cobalt‐Catalyzed Enantioselective Hydroboration/Cyclization of 1,7‐Enynes: Asymmetric Synthesis of Chiral Quinolinones Containing Quaternary Stereogenic Centers. Angew Chem Int Ed Engl 2019; 58:8882-8886. [DOI: 10.1002/anie.201903377] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 04/15/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Caizhi Wu
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Jiayu Liao
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Shaozhong Ge
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
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34
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Wu C, Liao J, Ge S. Cobalt‐Catalyzed Enantioselective Hydroboration/Cyclization of 1,7‐Enynes: Asymmetric Synthesis of Chiral Quinolinones Containing Quaternary Stereogenic Centers. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903377] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Caizhi Wu
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Jiayu Liao
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Shaozhong Ge
- Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
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35
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Kim K, Choi H, Kang D, Hong S. Visible-Light Excitation of Quinolinone-Containing Substrates Enables Divergent Radical Cyclizations. Org Lett 2019; 21:3417-3421. [DOI: 10.1021/acs.orglett.9b01155] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Kiho Kim
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Hangyeol Choi
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Dahye Kang
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Sungwoo Hong
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
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36
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Muthukrishnan I, Sridharan V, Menéndez JC. Progress in the Chemistry of Tetrahydroquinolines. Chem Rev 2019; 119:5057-5191. [PMID: 30963764 DOI: 10.1021/acs.chemrev.8b00567] [Citation(s) in RCA: 229] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tetrahydroquinoline is one of the most important simple nitrogen heterocycles, being widespread in nature and present in a broad variety of pharmacologically active compounds. This Review summarizes the progress achieved in the chemistry of tetrahydroquinolines, with emphasis on their synthesis, during the period from mid-2010 to early 2018.
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Affiliation(s)
- Isravel Muthukrishnan
- Department of Chemistry, School of Chemical and Biotechnology , SASTRA Deemed University , Thanjavur 613401 , Tamil Nadu , India
| | - Vellaisamy Sridharan
- Department of Chemistry, School of Chemical and Biotechnology , SASTRA Deemed University , Thanjavur 613401 , Tamil Nadu , India.,Department of Chemistry and Chemical Sciences , Central University of Jammu , Rahya-Suchani (Bagla) , District-Samba, Jammu 181143 , Jammu and Kashmir , India
| | - J Carlos Menéndez
- Unidad de Química Orgańica y Farmacéutica, Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia , Universidad Complutense , 28040 Madrid , Spain
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37
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Petkowski JJ, Bains W, Seager S. Natural Products Containing 'Rare' Organophosphorus Functional Groups. Molecules 2019; 24:E866. [PMID: 30823503 PMCID: PMC6429109 DOI: 10.3390/molecules24050866] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 02/13/2019] [Accepted: 02/22/2019] [Indexed: 12/25/2022] Open
Abstract
Phosphorous-containing molecules are essential constituents of all living cells. While the phosphate functional group is very common in small molecule natural products, nucleic acids, and as chemical modification in protein and peptides, phosphorous can form P⁻N (phosphoramidate), P⁻S (phosphorothioate), and P⁻C (e.g., phosphonate and phosphinate) linkages. While rare, these moieties play critical roles in many processes and in all forms of life. In this review we thoroughly categorize P⁻N, P⁻S, and P⁻C natural organophosphorus compounds. Information on biological source, biological activity, and biosynthesis is included, if known. This review also summarizes the role of phosphorylation on unusual amino acids in proteins (N- and S-phosphorylation) and reviews the natural phosphorothioate (P⁻S) and phosphoramidate (P⁻N) modifications of DNA and nucleotides with an emphasis on their role in the metabolism of the cell. We challenge the commonly held notion that nonphosphate organophosphorus functional groups are an oddity of biochemistry, with no central role in the metabolism of the cell. We postulate that the extent of utilization of some phosphorus groups by life, especially those containing P⁻N bonds, is likely severely underestimated and has been largely overlooked, mainly due to the technological limitations in their detection and analysis.
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Affiliation(s)
- Janusz J Petkowski
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA.
| | - William Bains
- Rufus Scientific, 37 The Moor, Melbourn, Royston, Herts SG8 6ED, UK.
| | - Sara Seager
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA.
- Department of Physics, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA.
- Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA.
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38
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Chate AV, Redlawar AA, Bondle GM, Sarkate AP, Tiwari SV, Lokwani DK. A new efficient domino approach for the synthesis of coumarin-pyrazolines as antimicrobial agents targeting bacteriald-alanine-d-alanine ligase. NEW J CHEM 2019. [DOI: 10.1039/c9nj00703b] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The inhibition ofd-alanine-d-alanine ligase (Ddl) prevents bacterial growth, which makes this enzyme an attractive and viable target in the urgent search for novel effective antimicrobial drugs.
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Affiliation(s)
- Asha V. Chate
- Department of Chemistry, Dr Babasaheb Ambedkar Marathwada University
- Aurangabad-431 004
- India
| | - Ankita A. Redlawar
- Department of Chemistry, Dr Babasaheb Ambedkar Marathwada University
- Aurangabad-431 004
- India
| | - Giribala M. Bondle
- Department of Chemistry, Dr Babasaheb Ambedkar Marathwada University
- Aurangabad-431 004
- India
| | - Aniket P. Sarkate
- Department of Chemical Technology, Dr Babasaheb Ambedkar Marathwada University
- Aurangabad-431004
- India
| | - Shailee V. Tiwari
- Department of Pharmaceutical Chemistry, Durgamata Institute of Pharmacy
- Parbhani-431401
- India
| | - Deepak K. Lokwani
- R. C. Patel Institute of Pharmaceutical Education & Research
- Shirpur-425405
- India
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39
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Schwan J, Kleoff M, Hartmayer B, Heretsch P, Christmann M. Synthesis of Quinolinone Alkaloids via Aryne Insertions into Unsymmetric Imides in Flow. Org Lett 2018; 20:7661-7664. [PMID: 30479132 DOI: 10.1021/acs.orglett.8b03392] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A general strategy for the synthesis of 3,4-dioxygenated quinolin-2-one natural products is reported. The key step is a regioselective insertion of arynes into unsymmetric imides. When performed in continuous flow, the reaction proceeds within minutes, while lower yields and longer reaction times are observed in batch. The resulting N-acylated 2-aminobenzophenones were transformed to (±)-peniprequinolone, (±)-aflaquinolones E and F, (±)-6-deoxyaflaquinolone E, (±)-quinolinones A and B, and (±)-aniduquinolone C in 1-3 steps.
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Affiliation(s)
- Johannes Schwan
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Merlin Kleoff
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Bence Hartmayer
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Philipp Heretsch
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
| | - Mathias Christmann
- Institut für Chemie und Biochemie , Freie Universität Berlin , Takustr. 3 , 14195 Berlin , Germany
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40
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Chang WC, Liu P, Guo Y. Mechanistic Elucidation of Two Catalytically Versatile Iron(II)- and α-Ketoglutarate-Dependent Enzymes: Cases Beyond Hydroxylation. COMMENT INORG CHEM 2018. [DOI: 10.1080/02603594.2018.1509856] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Wei-chen Chang
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, USA
| | - Pinghua Liu
- Department of Chemistry, Boston University, Boston, Massachusetts, USA
| | - Yisong Guo
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
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41
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Vece V, Jakkepally S, Hanessian S. Total Synthesis and Absolute Stereochemical Assignment of the Insecticidal Metabolites Yaequinolones J1 and J2. Org Lett 2018; 20:4277-4280. [PMID: 29975546 DOI: 10.1021/acs.orglett.8b01701] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A highly stereocontrolled total synthesis of (-)-yaequinolone J1 and (+)-yaequinolone J2 was accomplished using an Evans auxiliary to establish a syn-diol unit in an acyclic appendage to a preformed benzopyran core bearing a homoprenyl group. The first total synthesis of a complex member of this family of 3,4-dioxygenated 3,4-dihydro 4-aryl quinolin-2-(1 H)-ones also allowed the assignment of absolute stereochemistry, thereby suggesting the same for several members of this family of biogenetically related alkaloids hitherto reported with relative configurations of stereogenic carbons for some and absolute assignments relying on empirical data for others.
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Affiliation(s)
- Vito Vece
- Department of Chemistry , Université de Montréal , P.O. Box 6128, Succ., Centre-ville, Montréal , Québec , Canada , H3C 3J7
| | - Shashidhar Jakkepally
- Department of Chemistry , Université de Montréal , P.O. Box 6128, Succ., Centre-ville, Montréal , Québec , Canada , H3C 3J7
| | - Stephen Hanessian
- Department of Chemistry , Université de Montréal , P.O. Box 6128, Succ., Centre-ville, Montréal , Québec , Canada , H3C 3J7
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42
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Doan SH, Nguyen VHH, Nguyen TH, Pham PH, Nguyen NN, Phan ANQ, Tu TN, Phan NTS. Cross-dehydrogenative coupling of coumarins with Csp3–H bonds using an iron–organic framework as a productive heterogeneous catalyst. RSC Adv 2018; 8:10736-10745. [PMID: 35541557 PMCID: PMC9078982 DOI: 10.1039/c8ra00872h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 03/08/2018] [Indexed: 11/21/2022] Open
Abstract
The iron–organic framework VNU-20 was utilized as an active heterogeneous catalyst for the cross-dehydrogenative coupling of coumarins with Csp3–H bonds in alkylbenzenes, cyclohexanes, ethers, and formamides.
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Affiliation(s)
- Son H. Doan
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Vu H. H. Nguyen
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Thuong H. Nguyen
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Phuc H. Pham
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Ngoc N. Nguyen
- Center for Innovative Materials and Architectures
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Anh N. Q. Phan
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Thach N. Tu
- Center for Innovative Materials and Architectures
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Nam T. S. Phan
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
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43
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Mou XF, Liu X, Xu RF, Wei MY, Fang YW, Shao CL. Scopuquinolone B, a new monoterpenoid dihydroquinolin-2(1H)-one isolated from the coral-derived Scopulariopsis sp. fungus. Nat Prod Res 2017; 32:773-776. [DOI: 10.1080/14786419.2017.1359177] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xiao-Feng Mou
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, Ocean University of China, Qingdao, The People’s Republic of China
| | - Xin Liu
- Technical Center, Beijing Entry-Exit Inspection and Quarantine Bureau, Beijing, The People’s Republic of China
| | - Ru-Fang Xu
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, Ocean University of China, Qingdao, The People’s Republic of China
| | - Mei-Yan Wei
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, Ocean University of China, Qingdao, The People’s Republic of China
- School of Pharmacy, Guangdong Medical University, Dongguan, The People’s Republic of China
| | - Yao-Wei Fang
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, Ocean University of China, Qingdao, The People’s Republic of China
- College of Marine Life and Fisheries, Huanghai Institute of Technology, Lianyungang, The People’s Republic of China
| | - Chang-Lun Shao
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, Ocean University of China, Qingdao, The People’s Republic of China
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Enzyme-catalyzed cationic epoxide rearrangements in quinolone alkaloid biosynthesis. Nat Chem Biol 2017; 13:325-332. [PMID: 28114276 PMCID: PMC5310975 DOI: 10.1038/nchembio.2283] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 11/28/2016] [Indexed: 11/08/2022]
Abstract
Epoxides are highly useful synthons and biosynthons for the construction of complex natural products during total synthesis and biosynthesis, respectively. Among enzyme-catalyzed epoxide transformations, a reaction that is notably missing, in regard to the synthetic toolbox, is cationic rearrangement that takes place under strong acid. This is a challenging transformation for enzyme catalysis, as stabilization of the carbocation intermediate upon epoxide cleavage is required. Here, we discovered two Brønsted acid enzymes that can catalyze two unprecedented epoxide transformations in biology. PenF from the penigequinolone pathway catalyzes a cationic epoxide rearrangement under physiological conditions to generate a quaternary carbon center, while AsqO from the aspoquinolone pathway catalyzes a 3-exo-tet cyclization to forge a cyclopropane-tetrahydrofuran ring system. The discovery of these new epoxide-modifying enzymes further highlights the versatility of epoxides in complexity generation during natural product biosynthesis.
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