1
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Charria-Girón E, Zeng H, Gorelik TE, Pahl A, Truong KN, Schrey H, Surup F, Marin-Felix Y. Arcopilins: A New Family of Staphylococcus aureus Biofilm Disruptors from the Soil Fungus Arcopilus navicularis. J Med Chem 2024; 67:15029-15040. [PMID: 39141525 PMCID: PMC11403616 DOI: 10.1021/acs.jmedchem.4c00585] [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: 08/16/2024]
Abstract
Biofilms represent a key challenge in the treatment of microbial infections; for instance, Staphylococcus aureus causes chronic or fatal infections by forming biofilms on medical devices. Herein, the fungus Arcopilus navicularis was found to produce a novel family of PKS-NRPS metabolites that are able to disrupt preformed biofilms of S. aureus. Arcopilins A-F (1-6), tetramic acids, and arcopilin G (7), a 2-pyridone, were elucidated using HR-ESI-MS and one-dimensional (1D) and two-dimensional (2D) nuclear magnetic resonance (NMR) spectroscopy. Their absolute configuration was established by the synthesis of MPTA-esters for 2, analysis of 1H-1H coupling constants, and ROESY correlations, along with comparison with the crystal structure of 7. Arcopilin A (1) not only effectively disrupts preformed biofilms of S. aureus but also potentiates the activity of gentamicin and vancomycin up to 115- and 31-fold times, respectively. Our findings demonstrate the potential application of arcopilins for the conjugated treatment of infections caused by S. aureus with antibiotics unable to disrupt preformed biofilms.
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Affiliation(s)
- Esteban Charria-Girón
- Department Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstrasse 7, 38124 Braunschweig, Germany
- Institute of Microbiology, Technische Universität Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany
| | - Haoxuan Zeng
- Department Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstrasse 7, 38124 Braunschweig, Germany
- Institute of Microbiology, Technische Universität Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany
| | - Tatiana E Gorelik
- Department Structure and Function of Proteins, Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany
- Department Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Campus E8.1, 66123 Saarbrücken, Germany
| | - Alexandra Pahl
- Department Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstrasse 7, 38124 Braunschweig, Germany
| | - Khai-Nghi Truong
- Rigaku Europe SE, Hugenottenallee 167, 63263 Neu-Isenburg, Germany
| | - Hedda Schrey
- Department Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstrasse 7, 38124 Braunschweig, Germany
- Institute of Microbiology, Technische Universität Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany
| | - Frank Surup
- Department Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstrasse 7, 38124 Braunschweig, Germany
- Institute of Microbiology, Technische Universität Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany
| | - Yasmina Marin-Felix
- Department Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstrasse 7, 38124 Braunschweig, Germany
- Institute of Microbiology, Technische Universität Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany
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2
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Tang Y, Wu N, Xu J, Zhang X, Li Y, Wang X. Metal-Free Cascade Formation of C-C and C-N Bond for the Construction of 3-Cyano-2-Pyridones with Insecticidal Properties. Molecules 2024; 29:2792. [PMID: 38930857 PMCID: PMC11206961 DOI: 10.3390/molecules29122792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 06/07/2024] [Accepted: 06/09/2024] [Indexed: 06/28/2024] Open
Abstract
A straightforward and efficient methodology has been developed for the synthesis of 3-cyano-2-pyridones via the C-C and C-N bond formation processes. A total of 51 diverse 3-cyano-2-pyridone derivatives were obtained in moderate to excellent yields. This reaction featured advantages such as a metal-free process, wide functional group tolerance, simple operation, and mild conditions. A plausible mechanism for the reaction was proposed. 3-cyano-2-pyridones as ricinine analogues for insecticidal properties were evaluated, and the compound 3ci (LC50 = 2.206 mg/mL) showed the best insecticidal property.
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Affiliation(s)
| | | | | | - Xiaopo Zhang
- Engineering Research Center of Tropical Medicine Innovation and Transformation of Ministry of Education, International Joint Research Center of Human-Machine Intelligent Collaborative for Tumor Precision Diagnosis and Treatment of Hainan Province, Hainan Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Academy of Medical Sciences, Hainan Medical University, Haikou 571199, China; (Y.T.); (N.W.); (J.X.)
| | - Youbin Li
- Engineering Research Center of Tropical Medicine Innovation and Transformation of Ministry of Education, International Joint Research Center of Human-Machine Intelligent Collaborative for Tumor Precision Diagnosis and Treatment of Hainan Province, Hainan Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Academy of Medical Sciences, Hainan Medical University, Haikou 571199, China; (Y.T.); (N.W.); (J.X.)
| | - Xuesong Wang
- Engineering Research Center of Tropical Medicine Innovation and Transformation of Ministry of Education, International Joint Research Center of Human-Machine Intelligent Collaborative for Tumor Precision Diagnosis and Treatment of Hainan Province, Hainan Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Academy of Medical Sciences, Hainan Medical University, Haikou 571199, China; (Y.T.); (N.W.); (J.X.)
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3
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Jamieson CS, Ohashi M, Houk KN, Tang Y. Computational Prediction and Experimental Validation of a Bridged Cation Intermediate in Akanthomycin Biosynthesis. J Am Chem Soc 2022; 144:5280-5283. [PMID: 35297629 DOI: 10.1021/jacs.2c02288] [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
Here we report a computation-driven chemoenzymatic synthesis and biosynthesis of the natural product deoxyakanthomycin, an atropisomeric pyridone natural product that features a 7-membered carbocycle with five stereocenters, one of which a quaternary center. The one-step synthesis from a biosynthetic precursor is based on computational analysis that predicted a σ-bridged cation mediated cyclization mechanism to form deoxyakanthomycin. The σ-bridged cation rationalizes the observed substrate-controlled selectivity; diastereoselectivity arises from attack of water anti to the σ-bridging, as is generally found for σ-bridged cations. Our studies also reveal a unifying biosynthetic strategy for 2-pyridone natural products that derive from a common o-quinone methide to create diverse structures.
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Affiliation(s)
- Cooper S Jamieson
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095, United States
| | - Masao Ohashi
- Department of Chemical and Biomolecular Engineering, University of California Los Angeles, Los Angeles, California 90095, United States
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095, United States
| | - Yi Tang
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095, United States.,Department of Chemical and Biomolecular Engineering, University of California Los Angeles, Los Angeles, California 90095, United States
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4
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Demertzidou VP, Kourgiantaki M, Zografos AL. A multifunctional divergent scaffold to access the formal syntheses of various sesquiterpenoids. Org Biomol Chem 2021; 19:8687-8690. [PMID: 34553736 DOI: 10.1039/d1ob01716k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of a divergent scaffold able to access an array of diverse natural sesquiterpenoids is described. The route unifies the scope of previously reported plans of our group to allow the scalable synthesis of 8,12-furo and lactone sesquiterpenoid carbocyclic cores of elemanes, germacranes, guaianes, cadinanes, lindenanes and myliols. The formal syntheses of furogermenone, methyl-curdionolide, zedoarol, qweicurculactone, lindenene and sarcandralactone A are reported.
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Affiliation(s)
- Vera P Demertzidou
- Aristotle University of Thessaloniki, Department of Chemistry, Laboratory of Organic Chemistry, University Campus, Chemistry Old Building, Thessaloniki 54124, Greece.
| | - Maria Kourgiantaki
- Aristotle University of Thessaloniki, Department of Chemistry, Laboratory of Organic Chemistry, University Campus, Chemistry Old Building, Thessaloniki 54124, Greece.
| | - Alexandros L Zografos
- Aristotle University of Thessaloniki, Department of Chemistry, Laboratory of Organic Chemistry, University Campus, Chemistry Old Building, Thessaloniki 54124, Greece.
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5
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Abstract
4-Hydroxy-2-pyridone alkaloids have attracted attention for synthetic and biosynthetic studies due to their broad biological activities and structural diversity. Here, we elucidated the pathway and chemical logic of (-)-sambutoxin (1) biosynthesis. In particular, we uncovered the enzymatic origin of the tetrahydropyran moiety and showed that the p-hydroxyphenyl group is installed via a late-stage, P450-catalyzed oxidation of the phenylalanine-derived side chain rather than via a direct incorporation of tyrosine.
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Affiliation(s)
- Eun Bin Go
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Lee Joon Kim
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Hosea M Nelson
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
- Department of Chemistry, California Institute of Technology, Pasadena, California 91125, United States
| | - Masao Ohashi
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
| | - Yi Tang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States
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6
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Bhat AH, Quiroga GN, La-Venia A, Grover HK, Riveira MJ. Biomimetic Domino Knoevenagel/Cycloisomerization Strategy for the Synthesis of Citridone A and Derivatives. J Org Chem 2021; 86:12226-12236. [PMID: 34410723 DOI: 10.1021/acs.joc.1c01542] [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
Studies on Knoevenagel condensations between conjugated dienals and 4-hydroxy-2-pyridone/quinolone-type 1,3-dicarbonyl equivalents led to the development of a simple one-pot strategy to access citridone A and related synthetic cyclopenta[b]furopyridones/quinolones. The present work highlights the power of domino cascades in the synthesis of natural product frameworks and may help promote future studies on this promising new class of pyridone alkaloids.
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Affiliation(s)
- Aabid H Bhat
- Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland A1B 3X7, Canada
| | - Gastón N Quiroga
- Instituto de Química Rosario, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario-CONICET, Suipacha 531, S2002LRK Rosario, Argentina
| | - Agustina La-Venia
- Instituto de Química Rosario, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario-CONICET, Suipacha 531, S2002LRK Rosario, Argentina
| | - Huck K Grover
- Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland A1B 3X7, Canada
| | - Martín J Riveira
- Instituto de Química Rosario, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario-CONICET, Suipacha 531, S2002LRK Rosario, Argentina
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7
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Liao D, Yang S, Ma K, Wang X, Lei X. Stereoselective synthesis of the C16–C25 fragment of alchivemycins A and B. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Guan Q, Lin C, Chen S, Gao F, Shen L. Palladium‐Catalyzed Selective Carbofunctionalization of Inert γ‐C(
sp
3
)−O Bonds with 4‐Hydroxypyridin‐2(
1H
)‐ones and 4‐Hydroxy‐
2H
‐pyran‐2‐ones. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Qifan Guan
- Jiangxi Engineering Laboratory of Waterborne Coatings College of Chemistry and Chemical Engineering Jiangxi Science & Technology Normal University Nanchang 330013 People's Republic of China
| | - Cong Lin
- Jiangxi Engineering Laboratory of Waterborne Coatings College of Chemistry and Chemical Engineering Jiangxi Science & Technology Normal University Nanchang 330013 People's Republic of China
| | - Sai Chen
- Jiangxi Engineering Laboratory of Waterborne Coatings College of Chemistry and Chemical Engineering Jiangxi Science & Technology Normal University Nanchang 330013 People's Republic of China
| | - Fei Gao
- Jiangxi Engineering Laboratory of Waterborne Coatings College of Chemistry and Chemical Engineering Jiangxi Science & Technology Normal University Nanchang 330013 People's Republic of China
| | - Liang Shen
- Jiangxi Engineering Laboratory of Waterborne Coatings College of Chemistry and Chemical Engineering Jiangxi Science & Technology Normal University Nanchang 330013 People's Republic of China
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9
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Zhang Z, Qiao T, Watanabe K, Tang Y. Concise Biosynthesis of Phenylfuropyridones in Fungi. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008321] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhuan Zhang
- Department of Chemical and Biomolecular Engineering University of California Los Angeles CA 90095 USA
- Department of Chemistry and Biochemistry University of California Los Angeles CA 90095 USA
| | - Tianzhang Qiao
- Department of Chemical and Biomolecular Engineering University of California Los Angeles CA 90095 USA
| | - Kenji Watanabe
- Department of Pharmaceutical Sciences University of Shizuoka Shizuoka Japan
| | - Yi Tang
- Department of Chemical and Biomolecular Engineering University of California Los Angeles CA 90095 USA
- Department of Chemistry and Biochemistry University of California Los Angeles CA 90095 USA
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10
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Concise Biosynthesis of Phenylfuropyridones in Fungi. Angew Chem Int Ed Engl 2020; 59:19889-19893. [DOI: 10.1002/anie.202008321] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/28/2020] [Indexed: 01/13/2023]
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11
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12
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Katsina T, Papoulidou KE, Zografos AL. Umpolung-like Cross-coupling of Tosylhydrazones with 4-Hydroxy-2-pyridones under Palladium Catalysis. Org Lett 2019; 21:8110-8115. [DOI: 10.1021/acs.orglett.9b03119] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Tania Katsina
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | | | - Alexandros L. Zografos
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
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13
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Phakdeeyothin K, Yotphan S. Metal-free regioselective direct thiolation of 2-pyridones. Org Biomol Chem 2019; 17:6432-6440. [PMID: 31218319 DOI: 10.1039/c9ob01061k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A highly regioselective metal-free direct C-H thiolation of 2-pyridones with disulfides or thiols has been developed. A combination of persulfate and a commercially available halide source such as LiCl, NCS or I2 enables the successful direct incorporation of a sulfide moiety into the 5-position of pyridone under mild conditions, providing a useful and convenient approach for the preparation of a diverse array of 5-thio-substituted pyridones in moderate to excellent yields.
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Affiliation(s)
- Kunita Phakdeeyothin
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
| | - Sirilata Yotphan
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
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14
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Chen SC, Liu ZM, Tan HB, Chen YC, Li SN, Li HH, Guo H, Zhu S, Liu HX, Zhang WM. Tersone A-G, New Pyridone Alkaloids from the Deep-Sea Fungus Phomopsis tersa. Mar Drugs 2019; 17:md17070394. [PMID: 31277263 PMCID: PMC6669727 DOI: 10.3390/md17070394] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 06/28/2019] [Accepted: 07/01/2019] [Indexed: 01/12/2023] Open
Abstract
Four phenylfuropyridone racemates, (±)-tersones A-C and E (1–3, 5), one phenylpyridone racemate, (±)-tersone D (4), one new pyridine alkaloid, tersone F (6), single new phenylfuropyridone, tersone G (7) and two known analogs 8 and 9 were isolated from the deep-sea fungus Phomopsis tersa. Their structures and absolute configurations were characterized on the basis of comprehensive spectroscopic analyses, single-crystal X-ray diffraction experiments, and electronic circular dichroism (ECD) calculations. Moreover, compounds 1–9 were evaluated for in vitro antimicrobial and cytotoxic activity. Compounds 5b and 8b exhibited antibacterial activity against S. aureus with the MIC value of 31.5 μg/mL, while compound 5b showed cytoxic activities against SF-268, MCF-7, HepG-2 and A549 cell lines with IC50 values of 32.0, 29.5, 39.5 and 33.2 μM, respectively.
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Affiliation(s)
- Shan-Chong Chen
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Zhao-Ming Liu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Hai-Bo Tan
- Program for Natural Products Chemical Biology, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Yu-Chan Chen
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Sai-Ni Li
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Hao-Hua Li
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Heng Guo
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Shuang Zhu
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Hong-Xin Liu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China.
| | - Wei-Min Zhang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China.
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15
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Maity S, Das D, Sarkar S, Samanta R. Direct Pd(II)-Catalyzed Site-Selective C5-Arylation of 2-Pyridone Using Aryl Iodides. Org Lett 2018; 20:5167-5171. [DOI: 10.1021/acs.orglett.8b02112] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saurabh Maity
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Debapratim Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Souradip Sarkar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Rajarshi Samanta
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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16
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Botubol-Ares J, Hanson JR, Hernández-Galán R, Collado IG. Mild Epoxidation of Allylic Alcohols Catalyzed by Titanium(III) Complexes: Selectivity and Mechanism. ACS OMEGA 2017; 2:3083-3090. [PMID: 31457640 PMCID: PMC6641598 DOI: 10.1021/acsomega.7b00386] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 06/13/2017] [Indexed: 05/16/2023]
Abstract
A novel methodology for the epoxidation of a broad range of primary, secondary, and tertiary allylic alcohols is described using tert-butyl hydroperoxide as oxidant and Ti(III) species generated by reduction of Ti(IV) complexes, with manganese (0) in 1,4-dioxane under mild reaction conditions. The reaction proceeded with wide substrate scope and high chemo- and diastereoselectivity. A mechanistic pathway for the reaction is also discussed.
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Affiliation(s)
- José
Manuel Botubol-Ares
- Departamento
de Química Orgánica, Facultad de Ciencias, Instituto
de Biomoléculas, Universidad de Cádiz, Campus Universitario Puerto Real
s/n, 11510 Puerto
Real, Cádiz, Spain
| | - James R. Hanson
- Department
of Chemistry, University of Sussex, Brighton, Sussex BN1 9QJ, U.K.
| | - Rosario Hernández-Galán
- Departamento
de Química Orgánica, Facultad de Ciencias, Instituto
de Biomoléculas, Universidad de Cádiz, Campus Universitario Puerto Real
s/n, 11510 Puerto
Real, Cádiz, Spain
| | - Isidro G. Collado
- Departamento
de Química Orgánica, Facultad de Ciencias, Instituto
de Biomoléculas, Universidad de Cádiz, Campus Universitario Puerto Real
s/n, 11510 Puerto
Real, Cádiz, Spain
- E-mail:
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17
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Abstract
The acid-promoted cycloisomerization of conjugated dienals and linearly-conjugated dienones for the synthesis of five-membered ring systems is reviewed.
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Affiliation(s)
- Martín J. Riveira
- Departamento de Química Orgánica
- Instituto de Química Rosario (CONICET – UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Suipacha 531
| | - Lucía A. Marsili
- Departamento de Química Orgánica
- Instituto de Química Rosario (CONICET – UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Suipacha 531
| | - Mirta P. Mischne
- Departamento de Química Orgánica
- Instituto de Química Rosario (CONICET – UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Suipacha 531
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18
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Affiliation(s)
- Pierrick Ondet
- Institut de Chimie de Nice; UMR 7272; Université Nice Sophia Antipolis; Parc Valrose 06108 Nice Cedex 2 France
| | - Gilles Lemière
- Institut de Chimie de Nice; UMR 7272; Université Nice Sophia Antipolis; Parc Valrose 06108 Nice Cedex 2 France
| | - Elisabet Duñach
- Institut de Chimie de Nice; UMR 7272; Université Nice Sophia Antipolis; Parc Valrose 06108 Nice Cedex 2 France
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19
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Diaz Ropero BPF, Elsegood MRJ, Fairley G, Pritchard GJ, Weaver GW. Pyridone Functionalization: Regioselective Deprotonation of 6-Methylpyridin-2(1H)- and -4(1H)-one Derivatives. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601156] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | | | - Gary Fairley
- Darwin Building (310), Cambridge Science Park; AstraZeneca R&D
- Oncology iMed; Milton Road CB4 0WG Cambridge UK
| | | | - George W. Weaver
- Department of Chemistry; Loughborough University; LE11 3TU Loughborough UK
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20
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Demertzidou VP, Zografos AL. Platinum-catalyzed cycloisomerizations of a common enyne: a divergent entry to cyclopropane sesquiterpenoids. Formal synthesis of sarcandralactone A. Org Biomol Chem 2016; 14:6942-6. [PMID: 27353206 DOI: 10.1039/c6ob01226d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A common enyne scaffold, resembling the structures of natural elemanes was found to be an excellent substrate for highly regioselective cycloisomerizations to produce diverse cyclopropane sesquiterpenoids. Platinum-catalysis was utilized to produce either lindenane or myliol cores, found in natural products, starting from enyne acetate 10 and its corresponding allene 12 respectively. Based on this concept, a second generation strategy allows the formal synthesis of sarcandralactone A.
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Affiliation(s)
- Vera P Demertzidou
- Department of Chemistry, Laboratory of Organic Chemistry, Aristotle University of Thessaloniki, University Campus, 54124, Thessaloniki, Greece.
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21
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Garcia-Castro M, Zimmermann S, Sankar MG, Kumar K. Gerüstdiversitätsbasierte Synthese und ihre Anwendung bei der Sonden- und Wirkstoffsuche. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201508818] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Miguel Garcia-Castro
- Abteilung Chemische Biologie; Max-Planck-Institut für molekulare Physiologie; Otto-Hahn-Straße 11 44227 Dortmund Deutschland
| | - Stefan Zimmermann
- Abteilung Chemische Biologie; Max-Planck-Institut für molekulare Physiologie; Otto-Hahn-Straße 11 44227 Dortmund Deutschland
| | - Muthukumar G. Sankar
- Abteilung Chemische Biologie; Max-Planck-Institut für molekulare Physiologie; Otto-Hahn-Straße 11 44227 Dortmund Deutschland
| | - Kamal Kumar
- Abteilung Chemische Biologie; Max-Planck-Institut für molekulare Physiologie; Otto-Hahn-Straße 11 44227 Dortmund Deutschland
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22
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Garcia-Castro M, Zimmermann S, Sankar MG, Kumar K. Scaffold Diversity Synthesis and Its Application in Probe and Drug Discovery. Angew Chem Int Ed Engl 2016; 55:7586-605. [DOI: 10.1002/anie.201508818] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 01/19/2016] [Indexed: 01/19/2023]
Affiliation(s)
- Miguel Garcia-Castro
- Department of Chemical Biology; Max Planck Institute of Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
| | - Stefan Zimmermann
- Department of Chemical Biology; Max Planck Institute of Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
| | - Muthukumar G. Sankar
- Department of Chemical Biology; Max Planck Institute of Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
| | - Kamal Kumar
- Department of Chemical Biology; Max Planck Institute of Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
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23
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Zhai H, Hrabar M, Gries R, Gries G, Britton R. Total Synthesis, Stereochemical Assignment, and Field-Testing of the Sex Pheromone of the StrepsipteranXenos peckii. Chemistry 2016; 22:6190-3. [DOI: 10.1002/chem.201505097] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Huimin Zhai
- Department of Chemistry; Simon Fraser University; Burnaby British Columbia V5A 1S6 Canada
| | - Michael Hrabar
- Department of Biological Sciences; Simon Fraser University; Burnaby British Columbia V5A 1S6 Canada
| | - Regine Gries
- Department of Biological Sciences; Simon Fraser University; Burnaby British Columbia V5A 1S6 Canada
| | - Gerhard Gries
- Department of Biological Sciences; Simon Fraser University; Burnaby British Columbia V5A 1S6 Canada
| | - Robert Britton
- Department of Chemistry; Simon Fraser University; Burnaby British Columbia V5A 1S6 Canada
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24
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Ye W, Schneller SW. The Synthesis of Both Diastereomers of 5'-Methylhomoaristeromycin. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2016; 35:105-13. [PMID: 26822838 DOI: 10.1080/15257770.2015.1114131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The preparation of the C-5' diastereomers of 5'-homoaristeromycin has been achieved in 6 steps beginning with readily available (3aR,6aR)-2,2-dimethyl-2H,3aH,4H,6aH-cyclopenta[1,3]dioxol-4-one in a Michael reaction employing chiral Evans N-acyloxazolidinones that served to direct the requisite side chain stereochemistry. The two targets were evaluated against a battery of viruses and found to possess activity only towards yellow fever. Both compounds were non-cytotoxic.
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Affiliation(s)
- Wei Ye
- a Molette Laboratory for Drug Discovery, Department of Chemistry and Biochemistry, Auburn University , Auburn , Alabama 36849
| | - Stewart W Schneller
- a Molette Laboratory for Drug Discovery, Department of Chemistry and Biochemistry, Auburn University , Auburn , Alabama 36849
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25
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Li Y, Xie F, Li X. Formal Gold- and Rhodium-Catalyzed Regiodivergent C–H Alkynylation of 2-Pyridones. J Org Chem 2016; 81:715-22. [DOI: 10.1021/acs.joc.5b02410] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yunyun Li
- Dalian Institute of Chemical
Physics, Chinese Academy of Science, Dalian 116023, China
| | - Fang Xie
- Dalian Institute of Chemical
Physics, Chinese Academy of Science, Dalian 116023, China
| | - Xingwei Li
- Dalian Institute of Chemical
Physics, Chinese Academy of Science, Dalian 116023, China
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26
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Affiliation(s)
- Hiroshi Tomoda
- Graduate School of Pharmaceutical Sciences, Kitasato University
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27
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Katsina T, Anagnostaki EE, Mitsa F, Sarli V, Zografos AL. Palladium-catalyzed direct alkenylation of 4-hydroxy-2-pyridones. RSC Adv 2016. [DOI: 10.1039/c5ra26360c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The first direct 3-alkenylation of N-substituted 4-hydroxy-2-pyridones with unactivated alkenes is reported through a palladium acetate catalyzed, oxidative coupling.
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Affiliation(s)
- Tania Katsina
- Aristotle University of Thessaloniki
- Department of Chemistry
- Laboratory of Organic Chemistry
- Thessaloniki
- Greece
| | - Elissavet E. Anagnostaki
- Aristotle University of Thessaloniki
- Department of Chemistry
- Laboratory of Organic Chemistry
- Thessaloniki
- Greece
| | - Foteini Mitsa
- Aristotle University of Thessaloniki
- Department of Chemistry
- Laboratory of Organic Chemistry
- Thessaloniki
- Greece
| | - Vasiliki Sarli
- Aristotle University of Thessaloniki
- Department of Chemistry
- Laboratory of Organic Chemistry
- Thessaloniki
- Greece
| | - Alexandros L. Zografos
- Aristotle University of Thessaloniki
- Department of Chemistry
- Laboratory of Organic Chemistry
- Thessaloniki
- Greece
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28
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Hrabar M, Zhai H, Gries R, Schaefer PW, Draper J, Britton R, Gries G. (7E,11E)-3,5,9,11-Tetramethyltridecadienal: Sex Pheromone of the Strepsipteran Xenos peckii. J Chem Ecol 2015; 41:732-9. [PMID: 26271674 DOI: 10.1007/s10886-015-0613-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 07/20/2015] [Accepted: 07/30/2015] [Indexed: 10/23/2022]
Abstract
Xenos peckii is a strepsipteran parasitoid of the common North American paper wasp, Polistes fuscatus. Mate-seeking X. peckii males respond to a long-range sex pheromone emitted by the female, which remains permanently embedded within the abdomen of a mobile host wasp. During peak pheromone signalling, we excised the female from her host, severed the cephalothorax containing the pheromone gland, extracted it in hexane, and analyzed aliquots of combined extracts by coupled gas chromatographic-electroantennographic detection (GC-EAD). These analyses revealed a candidate pheromone component (CPC) that consistently elicited strong responses from male antennae. We identified the CPC as (7E,11E)-3,5,9,11-tetramethyltridecadienal based on its retention indices (RI) on three GC-columns, RI inter-column differentials, mass and NMR spectra, and synthesis of an authentic standard that matched the GC-retention and spectrometric characteristics of the CPC. For a field experiment, we prepared (7E,11E)-3,5,9R,11-tetramethyltridecadienal and (7E,11E)-3,5,9S,11-tetramethyltridecadienal. Xenos peckii males were caught in traps baited with either compound singly or a 1:1 mixture of the two but not in unbaited control traps. The sex pheromone of X. peckii resembles that reported for the strepsipterans Stylops mellittae and S. muelleri, (R,R,R)-3,5,9-trimethyldodecanal, suggesting a common biosynthetic pathway across taxonomic genera.
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Affiliation(s)
- Michael Hrabar
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Huimin Zhai
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada.,Chemistry Department, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Regine Gries
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | | | - Jason Draper
- Chemistry Department, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Robert Britton
- Chemistry Department, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada.
| | - Gerhard Gries
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada.
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29
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Riveira MJ, Quiroga GN, Mata EG, Gandon V, Mischne MP. Cycloisomerization of Conjugated Trienones and Isomeric 2H-Pyrans: Unified Strategy toward Cyclopenta[b]furans. J Org Chem 2015; 80:6515-9. [DOI: 10.1021/acs.joc.5b00818] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Martín J. Riveira
- Instituto
de Química Rosario-CONICET, Facultad de Ciencias Bioquímicas
y Farmacéuticas, Universidad Nacional de Rosario, Suipacha
531, 2000 Rosario, Santa Fe, Argentina
| | - Gastón N. Quiroga
- Instituto
de Química Rosario-CONICET, Facultad de Ciencias Bioquímicas
y Farmacéuticas, Universidad Nacional de Rosario, Suipacha
531, 2000 Rosario, Santa Fe, Argentina
| | - Ernesto G. Mata
- Instituto
de Química Rosario-CONICET, Facultad de Ciencias Bioquímicas
y Farmacéuticas, Universidad Nacional de Rosario, Suipacha
531, 2000 Rosario, Santa Fe, Argentina
| | - Vincent Gandon
- ICMMO
(UMR CNRS 8182), Université Paris-sud 11, 91405 Orsay Cedex, France
- Institut de Chimie
des Substances Naturelles, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
| | - Mirta P. Mischne
- Instituto
de Química Rosario-CONICET, Facultad de Ciencias Bioquímicas
y Farmacéuticas, Universidad Nacional de Rosario, Suipacha
531, 2000 Rosario, Santa Fe, Argentina
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30
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Dutta U, Deb A, Lupton DW, Maiti D. The regioselective iodination of quinolines, quinolones, pyridones, pyridines and uracil. Chem Commun (Camb) 2015; 51:17744-7. [DOI: 10.1039/c5cc07799k] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A radical based direct C–H iodination protocol for quinolines, quinolones, pyridones, pyridines, and uracil has been developed.
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Affiliation(s)
- Uttam Dutta
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai - 400076
- India
- IITB-Monash Research Academy
| | - Arghya Deb
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai - 400076
- India
| | - David W. Lupton
- IITB-Monash Research Academy
- Mumbai - 400076
- India
- School of Chemistry
- Monash University
| | - Debabrata Maiti
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai - 400076
- India
- IITB-Monash Research Academy
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31
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Modak A, Rana S, Maiti D. Iron-Catalyzed Regioselective Direct Arylation at the C-3 Position of N-Alkyl-2-pyridone. J Org Chem 2014; 80:296-303. [DOI: 10.1021/jo502362k] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Atanu Modak
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sujoy Rana
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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32
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Li H, Zhang Y, Xie X, Ma H, Zhao C, Zhao G, She X. Bioinspired Total Synthesis of Gymnothelignan N. Org Lett 2014; 16:4440-3. [DOI: 10.1021/ol501960j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Huilin Li
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yuanyuan Zhang
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xingang Xie
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Haichen Ma
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Changgui Zhao
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Gaoyuan Zhao
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xuegong She
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Lanzhou 730000, People’s Republic of China
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33
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Synthesis and biological activity of Citridone A and its derivatives. J Antibiot (Tokyo) 2014; 67:445-50. [DOI: 10.1038/ja.2014.14] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 01/22/2014] [Accepted: 01/27/2014] [Indexed: 11/08/2022]
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34
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Anagnostaki EE, Fotiadou AD, Demertzidou V, Zografos AL. Palladium catalyzed C3-arylation of 4-hydroxy-2-pyridones. Chem Commun (Camb) 2014; 50:6879-82. [DOI: 10.1039/c4cc02166e] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The direct 3-arylation of 4-hydroxy-2-pyridones has been achieved for the first time by utilizing ligand free palladium(ii) catalysis under mild conditions.
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Affiliation(s)
- Elissavet E. Anagnostaki
- Laboratory of Organic Chemistry
- Department of Chemistry
- Aristotle University of Thessaloniki
- Thessaloniki 54124, Greece
| | - Anna D. Fotiadou
- Laboratory of Organic Chemistry
- Department of Chemistry
- Aristotle University of Thessaloniki
- Thessaloniki 54124, Greece
| | - Vera Demertzidou
- Laboratory of Organic Chemistry
- Department of Chemistry
- Aristotle University of Thessaloniki
- Thessaloniki 54124, Greece
| | - Alexandros L. Zografos
- Laboratory of Organic Chemistry
- Department of Chemistry
- Aristotle University of Thessaloniki
- Thessaloniki 54124, Greece
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35
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Abstract
This review covers uses of bismuth catalysts since 2005 with a special emphasis on the emerging applications of such catalysts. Low toxicity, low catalytic loading, synergistic effects with other catalysts, and some hydrocompatibility properties confer to bismuth salts major advantages. The expanding activity in the field clearly highlights the growing potential of bismuth catalysts. The article is not a comprehensive review on bismuth catalysis but a selection of its most promising uses in challenging synthetic transformations.
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Affiliation(s)
- Thierry Ollevier
- Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec (Québec) G1V 0A6, Canada.
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36
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Chong Q, Xin X, Wang C, Wu F, Wan B. Synthesis of functionalized 2-pyridones via Michael addition and cyclization reaction of amines, alkynes and dialkyl acetylene dicarboxylates. RSC Adv 2013. [DOI: 10.1039/c3ra43189d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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37
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Fotiadou AD, Zografos AL. Electrocyclization of Oxatrienes in the Construction of Structurally Complex Pyranopyridones. Org Lett 2012; 14:5664-7. [DOI: 10.1021/ol3026457] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anna D. Fotiadou
- Department of Chemistry, Laboratory of Organic Chemistry, Aristotle University of Thessaloniki, University Campus, 54124, Thessaloniki, Greece
| | - Alexandros L. Zografos
- Department of Chemistry, Laboratory of Organic Chemistry, Aristotle University of Thessaloniki, University Campus, 54124, Thessaloniki, Greece
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38
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Miller Y, Miao L, Hosseini AS, Chemler SR. Copper-catalyzed intramolecular alkene carboetherification: synthesis of fused-ring and bridged-ring tetrahydrofurans. J Am Chem Soc 2012; 134:12149-56. [PMID: 22720755 PMCID: PMC3430129 DOI: 10.1021/ja3034075] [Citation(s) in RCA: 139] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Fused-ring and bridged-ring tetrahydrofuran scaffolds are found in a number of natural products and biologically active compounds. A new copper-catalyzed intramolecular carboetherification of alkenes for the synthesis of bicyclic tetrahydrofurans is reported herein. The reaction involves Cu-catalyzed intramolecular addition of alcohols to unactivated alkenes and subsequent aryl C-H functionalization provides the C-C bond. Mechanistic studies indicate a primary carbon radical intermediate is involved and radical addition to the aryl ring is the likely C-C bond-forming mechanism. Preliminary catalytic enantioselective reactions are promising (up to 75% ee) and provide evidence that copper is involved in the alkene addition step, likely through a cis-oxycupration mechanism. Catalytic enantioselective alkene carboetherification reactions are rare and future development of this new method into a highly enantioselective process is promising. During the course of the mechanistic studies a protocol for alkene hydroetherification was also developed.
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Affiliation(s)
- Yan Miller
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Lei Miao
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Azade S. Hosseini
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Sherry R. Chemler
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
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39
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Kumarihamy M, Khan SI, Jacob M, Tekwani BL, Duke SO, Ferreira D, Nanayakkara ND. Antiprotozoal and antimicrobial compounds from the plant pathogen Septoria pistaciarum. JOURNAL OF NATURAL PRODUCTS 2012; 75:883-9. [PMID: 22530813 PMCID: PMC3361971 DOI: 10.1021/np200940b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Four new 1,4-dihydroxy-5-phenyl-2-pyridinone alkaloids, 17-hydroxy-N-(O-methyl)septoriamycin A (1), 17-acetoxy-N-(O-methyl)septoriamycin A (2), 13-(S)-hydroxy-N-(O-methyl)septoriamycin A (3), and 13-(R)-hydroxy-N-(O-methyl)septoriamycin A (4), together with the known compounds (+)-cercosporin (5), (+)-14-O-acetylcercosporin (6), (+)-di-O-acetylcercosporin (7), lumichrome, and brassicasterol, were isolated from an ethyl acetate extract of a culture medium of Septoria pistaciarum. Methylation of septoriamycin A (8) with diazomethane yielded three di-O-methyl analogues, two of which existed as mixtures of rotamers. We previously reported antimalarial activity of septoriamycin A. This compound also exhibited significant activity against Leishmania donovani promastigotes. Compounds 5-7 showed moderate in vitro activity against L. donovani promastigotes and chloroquine-sensitive (D6) and -resistant (W2) strains of Plasmodium falciparum, whereas compound 5 was fairly active against methicillin-sensitive and methicillin-resistant strains of Staphylococcus aureus. Compounds 5-7 also displayed moderate phytotoxic activity against both a dicot (lettuce, Lactuca sativa) and a monocot (bentgrass, Agrostis stolonifera) and cytotoxicity against a panel of cell lines.
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40
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Anagnostaki EE, Zografos AL. “Common synthetic scaffolds” in the synthesis of structurally diverse natural products. Chem Soc Rev 2012; 41:5613-25. [DOI: 10.1039/c2cs35080g] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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41
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Chen Y, Wang F, Jia A, Li X. Palladium-catalyzed selective oxidative olefination and arylation of 2-pyridones. Chem Sci 2012. [DOI: 10.1039/c2sc20869e] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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