1
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OuYang M, OuYang J, Dong Y, Li J, Yang W. Lewis Acid-Catalyzed Tandem Reaction Strategy for the Synthesis of Dihydrophenalene-Fused Lactones. J Org Chem 2024; 89:6322-6333. [PMID: 38634794 DOI: 10.1021/acs.joc.4c00314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
A Lewis acid-catalyzed tandem reaction strategy for the construction of a dihydrophenalene-lactone tetracyclic skeleton has been disclosed. Starting with 2-naphthol-tethered ketones and active methylene esters, the tandem reaction catalyzed by Sc(OTf)3 proceeded well to afford an array of dihydrophenalene-fused lactones with moderate to high efficiency and diastereoselectivity. Moreover, the synthetic utility of this protocol was demonstrated by easy gram-scale preparation and diverse product transformations.
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Affiliation(s)
- Mingjing OuYang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Jiewen OuYang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Yibin Dong
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Jinwei Li
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Wen Yang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
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2
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Yoshioka K, Iwasaki H, Hanaki M, Ito S, Iwamoto Y, Ichihara R, Nambu H. A SmI 2-mediated reductive cyclisation reaction using the trifluoroacetamide group as the radical precursor. Org Biomol Chem 2024; 22:1988-1992. [PMID: 38363092 DOI: 10.1039/d3ob02040a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
A samarium(II)-mediated reductive cyclisation reaction with the aminoketyl radical from the trifluoroacetamide group for synthesising 2-trifluoromethylindolines was developed. This reaction is the first example of using an acyclic amide group, which is considered difficult to react with SmI2, in a reductive cyclisation. Additionally, the conversion of the obtained product into 2-trifluoromethylindole was achieved.
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Affiliation(s)
- Kota Yoshioka
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono-cho, Yamashina-ku, Kyoto, 607-8412, Japan.
| | - Hiroki Iwasaki
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono-cho, Yamashina-ku, Kyoto, 607-8412, Japan.
| | - Mako Hanaki
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono-cho, Yamashina-ku, Kyoto, 607-8412, Japan.
| | - Saho Ito
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono-cho, Yamashina-ku, Kyoto, 607-8412, Japan.
| | - Yuzuha Iwamoto
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono-cho, Yamashina-ku, Kyoto, 607-8412, Japan.
| | - Rio Ichihara
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono-cho, Yamashina-ku, Kyoto, 607-8412, Japan.
| | - Hisanori Nambu
- Kyoto Pharmaceutical University, 1 Misasagi-Shichono-cho, Yamashina-ku, Kyoto, 607-8412, Japan.
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3
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OuYang M, Yuan M, Li J, Yang W. Brønsted Acid-Catalyzed Tandem Double Friedel-Crafts Alkylation to Construct a Dihydrophenalene Skeleton Bearing an All-Carbon Quaternary Center. J Org Chem 2024; 89:576-588. [PMID: 38145504 DOI: 10.1021/acs.joc.3c02310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
An efficient Brønsted acid-catalyzed tandem reaction has been developed for the construction of a dihydrophenalene skeleton bearing an all-carbon quaternary center. Starting with 2-naphthol-tethered ketones and indoles, the tandem reaction catalyzed by TsOH monohydrate proceeded smoothly with good to excellent efficiency through a double Friedel-Crafts alkylation process. Moreover, the synthetic utility of this method was demonstrated by easy gram-scale preparation and product transformations to fused hexacyclic compounds.
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Affiliation(s)
- Mingjing OuYang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Min Yuan
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Jinwei Li
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Wen Yang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
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4
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Ocampos FMM, de Souza AJB, Antar GM, Wouters FC, Colnago LA. Phytotoxicity of Schiekia timida Seed Extracts, a Mixture of Phenylphenalenones. Molecules 2021; 26:4197. [PMID: 34299471 PMCID: PMC8304753 DOI: 10.3390/molecules26144197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 07/03/2021] [Accepted: 07/06/2021] [Indexed: 11/16/2022] Open
Abstract
Phenylphenalenones, metabolites found in Schiekia timida (Haemodoraceae), are a class of specialized metabolites with many biological activities, being phytoalexins in banana plants. In the constant search to solve the problem of glyphosate and to avoid resistance to commercial herbicides, this work aimed to investigate the phytotoxic effect of the methanolic extract of S. timida seeds. The chemical composition of the seed extract was directly investigated by NMR and UPLC-QToF MS and the pre- and post-emergence phytotoxic effect on a eudicotyledonous model (Lactuca sativa) and a monocotyledonous model (Allium cepa) was evaluated through germination and seedling growth tests. Three concentrations of the extract (0.25, 0.50, and 1.00 mg/mL) were prepared, and four replicates for each of them were analyzed. Three major phenylphenalenones were identified by NMR spectroscopy: 4-hydroxy-anigorufone, methoxyanigorufone, and anigorufone, two of those reported for the first time in S. timida. The presence of seven other phenylphenalenones was suggested by the LC-MS analyses. The phenylphenalenone mixture did not affect the germination rate, but impaired radicle and hypocotyl growth on both models. The effect in the monocotyledonous model was statistically similar to glyphosate in the lowest concentration (0.25 mg/mL). Therefore, although more research on this topic is required to probe this first report, this investigation suggests for the first time that phenylphenalenone compounds may be post-emergence herbicides.
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Affiliation(s)
| | - Ana Julia Borim de Souza
- Faculdade de Ciências, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Bauru CEP 17033-360, SP, Brazil;
| | - Guilherme Medeiros Antar
- Instituto de Biociências, Departamento de Botânica, Universidade de São Paulo (USP), Butantã, São Paulo CEP 05508-090, SP, Brazil;
| | - Felipe Christoff Wouters
- Departamento de Química, Universidade Federal de São Carlos (UFSCAR), São Carlos CEP 13565-905, SP, Brazil;
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5
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Castaño LM, Gómez AF, Gil J, Durango D. Perinaphthenone and derivatives as control agents of phytopathogenic fungi: fungitoxicity and metabolism. Heliyon 2021; 7:e06354. [PMID: 33748457 PMCID: PMC7969902 DOI: 10.1016/j.heliyon.2021.e06354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 01/13/2021] [Accepted: 02/19/2021] [Indexed: 11/29/2022] Open
Abstract
Metabolism and in vitro fungitoxicity of perinaphthenone against three economically important fungi of the citrus, Botryodiplodia spp., Botrytis spp. and Fusarium spp. were investigated. Perinaphthenone exhibited significant antifungal activity at 62.5 μM and above. Even, the inhibitory effect against Fusarium spp. was significantly enhanced by exposure to direct light. In addition, the metabolism of perinaphthenone by the three fungi was studied. Results show that perinaphthenone was transformed almost completely during the first 24 h; two major products, whose concentration increased progressively during the twelve days of the test, were isolated and identified as 2,3-dihydro-1H-phenalen-1-ol and 2,3-dihydro-phenalen-1-one. Although both metabolic products displayed a considerable fungistatic effect, their slightly lower activities in comparison to perinaphthenone indicate that the transformation was a detoxification process. Studies on the relationship between the effect of some substituents in the perinaphthenone core and the mycelial growth inhibition of Botryodiplodia spp. were also carried out. Results show that the α, β-unsaturated carbonyl system is an important structural requirement but not the only to be necessary for the strong antifungal activity of perinaphthenone. In general, the antifungal properties of perinaphthenone may be modulated through the incorporation of substituents in the naphthalene core or in the α, β-unsaturated carbonyl system. It is concluded that perinaphthenone could be used as an antifungal agent or as a structural template for the development of new fungicide compounds.
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Affiliation(s)
- Luisa M. Castaño
- Universidad Nacional de Colombia-Sede Medellín, Facultad de Ciencias, Escuela de Química, Carrera 65, 59A-110, Medellín, Colombia
| | - Andrés F. Gómez
- Universidad Nacional de Colombia-Sede Medellín, Facultad de Ciencias, Escuela de Química, Carrera 65, 59A-110, Medellín, Colombia
| | - Jesús Gil
- Universidad Nacional de Colombia-Sede Medellín, Facultad de Ciencias Agrarias, Departamento de Ingeniería Agrícola y Alimentos, Carrera 65, 59A-110, Medellín, Colombia
| | - Diego Durango
- Universidad Nacional de Colombia-Sede Medellín, Facultad de Ciencias, Escuela de Química, Carrera 65, 59A-110, Medellín, Colombia
- Corresponding author.
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6
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Kuo C, Rao NS, Patil PB, Chiang T, Kavala V, Yao C. Synthesis of Perinaphthenones
via
BF
3
.
Et
2
O Mediated One‐Pot Cascade 4,5‐Annulation Reactions of 1‐Naphthols and Ynones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Chun‐Wei Kuo
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei 116, R.O.C. Taiwan
| | - Naidu Sambasiva Rao
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei 116, R.O.C. Taiwan
| | - Prakash Bhimrao Patil
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei 116, R.O.C. Taiwan
| | - Ting‐Ta Chiang
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei 116, R.O.C. Taiwan
| | - Veerababurao Kavala
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei 116, R.O.C. Taiwan
| | - Ching‐Fa Yao
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei 116, R.O.C. Taiwan
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7
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De Bonfils P, Verron E, Sandoval-Altamirano C, Jaque P, Moreau X, Gunther G, Nun P, Coeffard V. Unusual Oxidative Dealkylation Strategy toward Functionalized Phenalenones as Singlet Oxygen Photosensitizers and Photophysical Studies. J Org Chem 2020; 85:10603-10616. [DOI: 10.1021/acs.joc.0c01140] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Paul De Bonfils
- CEISAM UMR CNRS 6230, Université de Nantes, F-44000 Nantes, France
| | - Elise Verron
- CEISAM UMR CNRS 6230, Université de Nantes, F-44000 Nantes, France
| | - Catalina Sandoval-Altamirano
- Facultad de Quı́mica y Biologı́a, Universidad de Santiago de Chile, Casilla 40, correo 33, Santiago 518000, Chile
| | - Pablo Jaque
- Facultad de Ciencias Quı́micas y Farmacéuticas, Departamento de Quı́mica Orgánica y Fisicoquı́mica, Universidad de Chile, Casilla 233, Santiago 8380492, Chile
| | - Xavier Moreau
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, 78035 Versailles, France
| | - German Gunther
- Facultad de Ciencias Quı́micas y Farmacéuticas, Departamento de Quı́mica Orgánica y Fisicoquı́mica, Universidad de Chile, Casilla 233, Santiago 8380492, Chile
| | - Pierrick Nun
- CEISAM UMR CNRS 6230, Université de Nantes, F-44000 Nantes, France
| | - Vincent Coeffard
- CEISAM UMR CNRS 6230, Université de Nantes, F-44000 Nantes, France
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8
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Barrera J, Patiño E, Otálvaro F. Improved synthesis of natural isomeric naphthoxanthenones. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151359] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Szamosvári D, Schuhmacher T, Hauck CR, Böttcher T. A thiochromenone antibiotic derived from the Pseudomonas quinolone signal selectively targets the Gram-negative pathogen Moraxella catarrhalis. Chem Sci 2019; 10:6624-6628. [PMID: 31367314 PMCID: PMC6624978 DOI: 10.1039/c9sc01090d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 05/23/2019] [Indexed: 01/20/2023] Open
Abstract
The Pseudomonas quinolone signal (PQS) is an important quorum sensing signal of the pathogen Pseudomonas aeruginosa. We discovered an additional activity of PQS as a narrow spectrum antibiotic. Exploiting the privileged structure of PQS by the synthesis of heteroatom-substituted analogues led to a class of 2-alkyl-3-hydroxythiochromen-4-ones with highly potent antibiotic activity against the nasopharyngeal pathogen Moraxella catarrhalis. Synthetic optimization resulted in minimum inhibitory concentrations in the nanomolar range even for clinical isolates of M. catarrhalis. Surprisingly, the growth of other human pathogens and commensals, including closely related Moraxella species, was not inhibited, indicating exceptional species selectivity. Mechanistic studies revealed that the antibiotic was bactericidal and likely inhibits a target in the primary energy metabolism causing rapid depletion of the cellular ATP pool.
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Affiliation(s)
- Dávid Szamosvári
- Department of Chemistry , Konstanz Research School Chemical Biology , Zukunftskolleg , University of Konstanz , 78457 Konstanz , Germany .
| | - Tamara Schuhmacher
- Department of Biology , University of Konstanz , 78457 Konstanz , Germany .
| | - Christof R Hauck
- Department of Biology , University of Konstanz , 78457 Konstanz , Germany .
| | - Thomas Böttcher
- Department of Chemistry , Konstanz Research School Chemical Biology , Zukunftskolleg , University of Konstanz , 78457 Konstanz , Germany .
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10
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Wang MZ, Ku CF, Si TX, Tsang SW, Lv XM, Li XW, Li ZM, Zhang HJ, Chan ASC. Concise Synthesis of Natural Phenylphenalenone Phytoalexins and a Regioisomer. JOURNAL OF NATURAL PRODUCTS 2018; 81:98-105. [PMID: 29281282 DOI: 10.1021/acs.jnatprod.7b00709] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Concise total syntheses of the natural phytoalexins 2-hydroxy-8-(4-hydroxyphenyl)phenalen-1-one (1), 2-hydroxy-8-(3,4-dihydroxyphenyl)phenalen-1-one (2), and hydroxyanigorufone (4), together with regioisomer 3 are accomplished in 11 or 12 steps. The synthetic strategy features a Friedel-Crafts acylation to construct the 1H-phenalen-1-one tricyclic core followed by a Suzuki cross-coupling to obtain the target compounds.
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Affiliation(s)
- Ming-Zhong Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, People's Republic of China
- School of Chinese Medicine, Hong Kong Baptist University , 7 Baptist University Road, Kowloon Tong, Hong Kong SAR, People's Republic of China
| | - Chuen-Fai Ku
- School of Chinese Medicine, Hong Kong Baptist University , 7 Baptist University Road, Kowloon Tong, Hong Kong SAR, People's Republic of China
| | - Tong-Xu Si
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, People's Republic of China
| | - Siu-Wai Tsang
- School of Chinese Medicine, Hong Kong Baptist University , 7 Baptist University Road, Kowloon Tong, Hong Kong SAR, People's Republic of China
| | - Xiao-Meng Lv
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, People's Republic of China
| | - Xiao-Wan Li
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, People's Republic of China
| | - Zheng-Ming Li
- State Key Laboratory of Elemento-organic Chemistry, Research Institute of Elemento-organic Chemistry, Nankai University , Tianjin 300071, People's Republic of China
| | - Hong-Jie Zhang
- School of Chinese Medicine, Hong Kong Baptist University , 7 Baptist University Road, Kowloon Tong, Hong Kong SAR, People's Republic of China
| | - Albert S C Chan
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, People's Republic of China
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11
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Fukuyama T, Sugimori T, Maetani S, Ryu I. Synthesis of perinaphthenones through rhodium-catalyzed dehydrative annulation of 1-naphthoic acids with alkynes. Org Biomol Chem 2018; 16:7583-7587. [DOI: 10.1039/c8ob01453a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A convenient method for the synthesis of perinaphthenones via rhodium-catalyzed dehydrative annulation of naphthoic acids with alkynes, which gave good to high yields of perinaphthenones, was developed.
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Affiliation(s)
- Takahide Fukuyama
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Osaka 599-8531
- Japan
| | - Taiki Sugimori
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Osaka 599-8531
- Japan
| | - Shinji Maetani
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Osaka 599-8531
- Japan
| | - Ilhyong Ryu
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Osaka 599-8531
- Japan
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12
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13
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Song R, Feng Y, Wang D, Xu Z, Li Z, Shao X. Phytoalexin Phenalenone Derivatives Inactivate Mosquito Larvae and Root-knot Nematode as Type-II Photosensitizer. Sci Rep 2017; 7:42058. [PMID: 28169356 PMCID: PMC5294642 DOI: 10.1038/srep42058] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 01/05/2017] [Indexed: 12/25/2022] Open
Abstract
Phytoalexins phenalenones (PNs) are phytochemicals biosynthesized inside the plant in responsive to exterior threat. PNs are excellent type-II photosensitizers, which efficiently produce singlet oxygen upon light irradiation. Based on the core functional structure of PNs, novel PN derivatives were synthesized here and their singlet oxygen generating abilities and their phototoxicity were evaluated. At the presence of light, these PNs have photoinduced toxicity towards Aedes albopictus larvae and nematode Meloidogyne incognita, while the activity lost in the dark. The obvious tissue damage was observed on the treated mosquito larvae and nematode due to the generation of singlet oxygen. Our results revealed the potential of phenalenones as photoactivated agents for mosquito and root-knot nematode management together with light.
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Affiliation(s)
- Runjiang Song
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Yian Feng
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Donghui Wang
- College of Life Sciences, Peking University, Beijing 100871, China
| | - Zhiping Xu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Zhong Li
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Xusheng Shao
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
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14
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Brkljača R, Schneider B, Hidalgo W, Otálvaro F, Ospina F, Lee S, Hoshino M, Fujita M, Urban S. Application of the Crystalline Sponge Method to Revise the Structure of the Phenalenone Fuliginone. Molecules 2017; 22:molecules22020211. [PMID: 28146104 PMCID: PMC6155586 DOI: 10.3390/molecules22020211] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 01/25/2017] [Indexed: 11/16/2022] Open
Abstract
The structure of fuliginone was revised from a phenyl substituted phenalenone to a hydroxyl substituted phenalenone as a result of its re-purification via HPLC with subsequent NMR analysis together with an independent synthesis and analysis of the crystal structure, which was secured via the crystalline sponge method. On-flow High Performance Liquid Chromatography coupled to Nuclear Magnetic Resonance spectroscopy (HPLC-NMR) was employed to confirm the presence of the natural product in the plant extract and to monitor for any possible degradation or conversion of the compound.
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Affiliation(s)
- Robert Brkljača
- School of Science (Applied Chemistry and Environmental Science), RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia;
| | - Bernd Schneider
- Max-Planck-Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Str. 8, D-07745 Jena, Germany; (B.S.); (W.H.)
| | - William Hidalgo
- Max-Planck-Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Str. 8, D-07745 Jena, Germany; (B.S.); (W.H.)
| | - Felipe Otálvaro
- Instituto de Química, Síntesis y Biosíntesis de Metabolitos Naturales, Universidad de Antioquia, AA 1226 Medellín, Colombia; (F.Ot.); (F.Os.)
| | - Felipe Ospina
- Instituto de Química, Síntesis y Biosíntesis de Metabolitos Naturales, Universidad de Antioquia, AA 1226 Medellín, Colombia; (F.Ot.); (F.Os.)
| | - Shoukou Lee
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan; (S.L.); (M.H.); (M.F.)
| | - Manabu Hoshino
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan; (S.L.); (M.H.); (M.F.)
| | - Makoto Fujita
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan; (S.L.); (M.H.); (M.F.)
| | - Sylvia Urban
- School of Science (Applied Chemistry and Environmental Science), RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia;
- Correspondence: ; Tel.: +61-3-9925-3376
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15
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Comparison of the ionizing radiation effects on cochineal, annatto and turmeric natural dyes. Radiat Phys Chem Oxf Engl 1993 2016. [DOI: 10.1016/j.radphyschem.2015.09.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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