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Journal articles on the topic '7-hydroxycoumarins'

Author: Grafiati

Published: 6 June 2025

Last updated: 2 August 2025

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1

Traven, Valery F., Larisa I. Vorobjeva, Tatjana A. Chibisova, Edward Andrew Carberry, and Noelle Jean Beyer. "Electronic absorption spectra and structure of hydroxycoumarin derivatives and their ionized forms." Canadian Journal of Chemistry 75, no. 4 (1997): 365–76. http://dx.doi.org/10.1139/v97-042.

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Electronic absorption spectra of 18 hydroxycoumarin derivatives and their ionized forms have been studied. Close agreement between experimental and the PPP CI calculated electron absorption band energies has been found in most cases. Strong polarization of the carbonyl function of the pyrone ring in the 7-hydroxycoumarin derivatives, H-bonding between the hydroxyl group and neighboring substituent in the ortho-substituted hydroxycoumarins, as well as their tautomeric transformations, have been suggested in the discussion of the electronic absorption spectra of the hydroxycoumarin derivatives.

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2

ALOK, KUMAR MITRA, DE APARNA, KARCHAUDHURI NILAY, KUMAR MISRA SWAPAN, and KUMAR MUKHOPADHYAY APURBA. "Synthesis of Coumarins in Search of Better Nonpeptidic HIV Protease Inhibitors." Journal of Indian Chemical Society Vol. 75, Oct-Dec 1998 (1998): 666–71. https://doi.org/10.5281/zenodo.5916038.

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Department of Chemistry, University of Calcutta, 92, Acharya Prafulla Chandra Road, Calcutta-700 009 <em>Manuscript received 7 August 1998</em> 3-Substituted-4-hydroxycoumarins have been recently identified as active nonpeptidic HIV protease inhibitors. In order to get more potent inhibitors, synthesis of a number of 3-substituted-4-hydroxycoumarins have been designed. Nucleophilicity of C-3 in 4- hydroxycoum arin is exploited by reacting with an electrophile 3-carbethoxycoumarin to achieve a new C-3 substituted-4-hydroxycoumarin. But the product identified is a benzopyranodicoumarin (2), whic

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3

Huitink, Geraldine M. "Studies of 7-hydroxycoumarins." Talanta 35, no. 12 (1988): 973–76. http://dx.doi.org/10.1016/0039-9140(88)80231-5.

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4

Datta, Mrityunjoy. "Synthesis of Linear 6-Allylated-7-hydroxycoumarins: para-Claisen Rearrangement of 2'-Allylated/Prenylated Derivatives of 4'-Prenyloxy Cinnamic Acid." Asian Journal of Chemistry 37, no. 1 (2024): 100–104. https://doi.org/10.14233/ajchem.2025.32937.

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Linear 6-allylated-7-hydroxycoumarins were synthesized by the para-Claisen rearrangement of 4'-prenyloxy cinnamic acid derivatives under refluxing condition in N,N-diethylaniline. This method eliminates the requirement for an additional Lewis acid, such as boron trifluoride etherate or trichloride, to convert 7-alkoxycoumarins into 7-hydroxycoumarins, unlike alternative techniques.

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5

Bondarenko, S. P., M. S. Frasinyuk, and V. P. Khilya. "Aminomethylation of 3-aryl-7-hydroxycoumarins." Chemistry of Heterocyclic Compounds 46, no. 5 (2010): 529–35. http://dx.doi.org/10.1007/s10593-010-0541-y.

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6

Timonen, Juri, Paula Aulaskari, Pipsa Hirva, and Pirjo Vainiotalo. "Negative Ion Electrospray Ionization Mass Spectrometry and Computational Studies on Substituted 7-Hydroxycoumarins." European Journal of Mass Spectrometry 15, no. 5 (2009): 595–603. http://dx.doi.org/10.1255/ejms.1019.

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Twenty-two substituted 7-hydroxycoumarins were studied by negative ion electrospray ionization collision-induced dissociation (CID) mass spectrometry. Fragmentation pathways were also investigated by computation method using the B3LYP density functional theory. In general, the most important fragmentations of the 7-hydroxycoumarin [M – H]− ions were the elimination of CO2 and CO which agreed with the calculated energies of the proposed fragmentation reactions. In most cases, methyl group elimination was also favorable. Methyl group elimination occurred in three different ways, the most interes

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7

Smith, Gerald J., Roderick J. Weston, Ying Tang, Yinrong Lu, and Jolon M. Dyer. "Photoproducts of 7-Hydroxycoumarins in Aqueous Solution." Australian Journal of Chemistry 65, no. 10 (2012): 1451. http://dx.doi.org/10.1071/ch12292.

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Near-UV irradiation of aqueous solutions of 7-hydroxy-6-methoxycoumarin (scopoletin) and 6,7-dihydroxycoumarin (esculetin) resulted in the formation of dimers. Substantially greater amounts of the 7-hydroxy-6-methoxycoumarin photodimer were produced compared with that of 6,7-dihydroxycoumarin. Fluorescence spectra indicated that the initial photolytic reaction involves the excited state of the phenolate form of the monomeric coumarin. The electro-spray ionization (ESI) mass spectrum suggested that the major product (with a sodiated quasimolecular ion at m/z 405) from the photolysis of scopolet

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8

Liu, Chang-Ling, Miao Li, Ai-Ying Guan, Hong Zhang, and Zheng-Ming Li. "Design, Synthesis and Fungicidal Activity of Novel (E)-Methyl 2-{2-[(coumarin-7-yloxy)methyl]phenyl}-3-methoxyacrylates." Natural Product Communications 2, no. 8 (2007): 1934578X0700200. http://dx.doi.org/10.1177/1934578x0700200811.

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A number of 7-hydroxycoumarins (5), on treatment with one equivalent of ( E)-methyl 2-{2-[(chloromethyl)phenyl]}-3-methoxyacrylate (6) at 80°C for 6–8 h, afforded ( E)-methyl 2-{2-[(coumarin-7-yloxy)methyl]phenyl}-3-methoxyacrylates (2) in 80–85% yields. The 7-hydroxycoumarins (5) were in turn prepared from resorcinols (3) and substituted ethyl 3-oxopropanoate (4). Subsequently, results of biological activities evaluated in the greenhouse indicated that several of these compounds have good fungicidal activity against cucumber downy mildew (CDM) at 25g ai/ha.

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9

Rashid, Mohammad A., James A. Armstrong, Alexander I. Gray, and Peter G. Waterman. "Novel C-Geranyl 7-Hydroxycoumarins from the Aerial Parts of Eriostemon tomentellus." Zeitschrift für Naturforschung B 47, no. 2 (1992): 284–87. http://dx.doi.org/10.1515/znb-1992-0221.

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From the aerial parts of Eriostemon tomentellus five coumarins have been isolated. These have been characterized as ostruthin (6-geranyl-7-hydroxycoumarin (1)) and the novel compounds, 8-geranyl-7-hydroxycoumarin (2), (E)-6-(7-hydroxy-3,7-dimethylocta-2,5-dienyl)- 7-hydroxycoumarin (3), (E)-6-(7-hydroperoxy-3,7-dimethylocta-2,5-dienyl)-7-hydroxycoumarin (4), and 6-(6-hydroxy-3,7-dimethylocta-2,7-dienyl)-7-hydroxycoumarin (5). In addition tembamide (2-{4-methoxyphenyl}-2-hydroxy-N-benzoylethylamine (6 ) was isolated and the l3C NMR spectrum reported for the first time.

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10

Abrams, Barny. "Mono-Chlorinated 3-Carboxy-7-Hydroxycoumarin: A Highly Fluorescent and Water-Soluble Violet Excitable Dye for Cell Analysis." Blood 112, no. 11 (2008): 4929. http://dx.doi.org/10.1182/blood.v112.11.4929.4929.

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Abstract In our search for new violet excitable dyes with improved photochemical properties, we examined several halogen substituted 7-hydroxycoumarins and found that chlorinated derivatives could be as bright as their fluorinated analogs. In particular, mono-chlorinated 3-carboxy-7-hydroxycoumarin (V450) has a quantum yield equal to 3-carboxy-6,8- difluoro-7-hydroxycoumarin (Pacific Blue™). Antibodies specific to various cell surface markers (CD3, CD4, CD45) were labeled with V450 and tested in single color flow cytometry assays. Our results show that conjugates of V450 are brighter than the

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11

Frasinyuk, M. S., A. V. Turov, V. I. Vinogradova, and V. P. Khilya. "Aminomethylation of cytisine by 3-hetaryl-7-hydroxycoumarins." Chemistry of Natural Compounds 43, no. 2 (2007): 176–80. http://dx.doi.org/10.1007/s10600-007-0073-6.

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12

Simkovitch, Ron, Luís Pinto da Silva, Joaquim C. G. Esteves da Silva, and Dan Huppert. "Comparison of the Photoprotolytic Processes of Three 7-Hydroxycoumarins." Journal of Physical Chemistry B 120, no. 39 (2016): 10297–310. http://dx.doi.org/10.1021/acs.jpcb.6b01383.

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13

Shilin, S. V., M. M. Garazd, and V. P. Khilya. "Synthesis of dipeptide derivatives of 3,4-substituted 7-hydroxycoumarins." Chemistry of Natural Compounds 44, no. 3 (2008): 301–5. http://dx.doi.org/10.1007/s10600-008-9047-6.

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14

Hoefnagel, Anthonius J., Eric A. Gunnewegh, Roger S. Downing, and Herman van Bekkum. "Synthesis of 7-hydroxycoumarins catalysed by solid acid catalysts." Journal of the Chemical Society, Chemical Communications, no. 2 (1995): 225. http://dx.doi.org/10.1039/c39950000225.

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15

Talekar, P. R. "Copper triflate catalysed synthesis of Coumarinophosphorothioates." International Journal of Advance and Applied Research 5, no. 23 (2024): 183–85. https://doi.org/10.5281/zenodo.13622067.

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Abstract:  A new method was developed to prepare coumarino-phosphoro-thioates (2a-g) from 7-hydroxycoumarins (1a-g). This approach uses O, O-diethyl phosphorochloridothioate along, & employs copper triflate as the driving force...

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16

A., D. GHARDE, and J. GHIYA B. "Reaction of 7-Hydroxycoumarins with activated DMSO and Dibromomethane : Formation of Dicoumarols." Journal of Indian Chemical Society Vol. 72, Mar 1995 (1995): 209–10. https://doi.org/10.5281/zenodo.5902106.

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Nutan Adarsha College, Umrer, Nagpur Dcpartment of Chemistry, Institute of Science. Nagpur-440 001 <em>Manuscript received 17 August 1993, revised 3 November 1993, accepted 19 November 1993</em> Reaction of 7-Hydroxycoumarins with activated DMSO and Dibromomethane : Formation of Dicoumarols

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17

Moskvina, V. S., V. P. Khilya, and A. A. Ishchenko. "Structure and spectral-luminescent properties of 6-isoxazolyl-7-hydroxycoumarins." Optics and Spectroscopy 112, no. 4 (2012): 506–13. http://dx.doi.org/10.1134/s0030400x12040157.

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18

Kozlova, I. K. "Synthesis of o-acylamino-4-methyl-7-hydroxycoumarins (4-methylumbelliferones)." Chemistry of Heterocyclic Compounds 21, no. 7 (1985): 750–53. http://dx.doi.org/10.1007/bf00519138.

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19

Lanterna, Anabel E., María González-Béjar, Mathieu Frenette, and Juan C. Scaiano. "Photophysics of 7-mercapto-4-methylcoumarin and derivatives: complementary fluorescence behaviour to 7-hydroxycoumarins." Photochemical & Photobiological Sciences 16, no. 8 (2017): 1284–89. http://dx.doi.org/10.1039/c7pp00121e.

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20

Raunio, Hannu, Olli Pentikäinen, and Risto O. Juvonen. "Coumarin-Based Profluorescent and Fluorescent Substrates for Determining Xenobiotic-Metabolizing Enzyme Activities In Vitro." International Journal of Molecular Sciences 21, no. 13 (2020): 4708. http://dx.doi.org/10.3390/ijms21134708.

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in vivo methods, such as spectrophotometric, fluorometric, mass spectrometric,and radioactivity-based techniques. In fluorescence-based assays, the reaction produces a fluorescentproduct from a nonfluorescent substrate or vice versa. Fluorescence-based enzyme assays areusually highly sensitive and specific, allowing measurements on small specimens of tissues withlow enzyme activities. Fluorescence assays are also amenable to miniaturization of the reactionmixtures and can thus be done in high throughput. 7-Hydroxycoumarin and its derivatives arewidely used as fluorophores due to their desirabl

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21

HOEFNAGEL, A. J., E. A. GUNNEWEGH, R. S. DOWNING, and H. VAN BEKKUM. "ChemInform Abstract: Synthesis of 7-Hydroxycoumarins Catalyzed by Solid Acid Catalysts." ChemInform 26, no. 24 (2010): no. http://dx.doi.org/10.1002/chin.199524127.

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22

Gao, Fan, Deng Tao, Cheng Ju, et al. "Regioselectivity of aminomethylation in 3-acetyl-7-hydroxycoumarins: Mannich bases and Betti bases." New Journal of Chemistry 45, no. 22 (2021): 9864–71. http://dx.doi.org/10.1039/d1nj01584b.

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23

Seixas de Melo, J., and P. F. Fernandes. "Spectroscopy and photophysics of 4- and 7-hydroxycoumarins and their thione analogs." Journal of Molecular Structure 565-566 (May 2001): 69–78. http://dx.doi.org/10.1016/s0022-2860(01)00458-6.

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24

Gadirov, R. M., L. G. Samsonova, T. N. Kopylova, N. I. Selivanov, V. P. Hilya, and V. V. Ishchenko. "Spectral and luminescent properties of substituted 7-hydroxycoumarins and their sensor possibilities." Russian Physics Journal 56, no. 2 (2013): 213–19. http://dx.doi.org/10.1007/s11182-013-0017-5.

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25

Garazd, Ya L., and M. M. Garazd. "Modified Coumarins. 39. Synthesis of Aloperine-Containing Mannich Bases of 7-Hydroxycoumarins." Chemistry of Natural Compounds 53, no. 3 (2017): 444–47. http://dx.doi.org/10.1007/s10600-017-2019-y.

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26

Roubinet, Benoît, Arnaud Chevalier, Pierre-Yves Renard, and Anthony Romieu. "A Synthetic Route to 3-(Heteroaryl)-7-hydroxycoumarins Designed for Biosensing Applications." European Journal of Organic Chemistry 2015, no. 1 (2014): 166—^82. http://dx.doi.org/10.1002/ejoc.201403215.

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27

Moriya, Tetsuo. "Excited-State Reactions of Coumarins. VII. The Solvent-Dependent Fluorescence of 7-Hydroxycoumarins." Bulletin of the Chemical Society of Japan 61, no. 6 (1988): 1873–86. http://dx.doi.org/10.1246/bcsj.61.1873.

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28

Nemai, C. Ganguly, K. Sukai Arun, Dutta Sanjoy, and De Prithwiraj. "Mitsunobu coupling of 7-hydroxycoumarins with allylic and propargylic alcohols : A facile direct access to tertiary allyl coumarinyl ethers." Journal of Indian Chemical Society Vol. 78, Aug 2001 (2001): 380–82. https://doi.org/10.5281/zenodo.5873027.

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Department of Chemistry, University of Kalyani, Kalyani-741 235, India <em>Manuscript received 11 December 2000, accepted 8 March 2001</em> Allylic and propargylic alcohols are coupled with 7-hydroxycoumarins under Mitsunobu conditions using diethyl azodicarboxylate (DEAD) and triphenylphosphine to afford the corresponding cournarinyl ethers without any rearrangement in good-to-acceptable yields. This route provides direct access to the 1,1-dimethylallyloxycournarins which arc key intermediates for the Claisen rearrangement-based synthesis of linear and angular coumarins.

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29

Kuranov, Sergey, Mariya Marenina, Dmitriy Ivankin, et al. "The Study of Hypoglycemic Activity of 7-Terpenylcoumarins." Molecules 27, no. 24 (2022): 8663. http://dx.doi.org/10.3390/molecules27248663.

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Natural and synthetic coumarins are often considered privileged scaffolds for obtaining pharmacological agents with hypoglycemic activity. Chemical modification of coumarins often leads to antidiabetic agents with greater efficacy. In the present work, twenty monoterpene-substituted 7-hydroxycoumarins were synthesized. A new approach using the Mitsunobu reaction was shown to be effective for the synthesis of target compounds. All of the synthesized compounds were evaluated in an oral glucose tolerance test, and two of them containing geranyl and (-)-myrtenyl substituents showed in vivo hypogly

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30

Laufer, M. "Synthesis of 7-hydroxycoumarins by Pechmann reaction using Nafion resin/silica nanocomposites as catalysts." Journal of Catalysis 218, no. 2 (2003): 315–20. http://dx.doi.org/10.1016/s0021-9517(03)00073-3.

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31

Kopylova, T. N., L. G. Samsonova, R. M. Gadirov, O. V. Shablykina, V. P. Khilya, and V. V. Ishchenko. "Spectral, luminescent, and lasing properties of 3-(benzothiazolyl-2)-7-hydroxy-and-8-hydroxycoumarins." Optics and Spectroscopy 100, no. 1 (2006): 34–40. http://dx.doi.org/10.1134/s0030400x06010085.

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32

RASHID, M. A., J. A. ARMSTRONG, A. I. GRAY, and P. G. WATERMAN. "ChemInform Abstract: Novel C-Geranyl 7-Hydroxycoumarins from the Aerial Parts of Eriostemon tomentellus." ChemInform 23, no. 19 (2010): no. http://dx.doi.org/10.1002/chin.199219323.

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33

GHARDE, A. D., and B. J. GHIYA. "ChemInform Abstract: Reaction of 7-Hydroxycoumarins with Activated DMSO and Dibromomethane: Formation of Dicoumarols." ChemInform 27, no. 21 (2010): no. http://dx.doi.org/10.1002/chin.199621152.

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34

Mirjalili, Bi Bi Fatemeh, Abdolhamid Bamoniri, and Seyede Azita Fazeli-Attar. "Nano-BFn/cellulose: a bio-based nano-catalyst for synthesis of bio-active 7-hydroxycoumarins." Research on Chemical Intermediates 48, no. 2 (2022): 839–51. http://dx.doi.org/10.1007/s11164-021-04634-0.

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35

Baggett, N., M. A. Case, P. R. Darby та C. J. Gray. "Action of almond β-d-glucosidase on fluorogenic substrates derived from 4-substituted 7-hydroxycoumarins". Enzyme and Microbial Technology 15, № 9 (1993): 742–48. http://dx.doi.org/10.1016/0141-0229(93)90004-l.

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36

Xiao, Zhangping, Deng Chen, Shanshan Song, et al. "7-Hydroxycoumarins Are Affinity-Based Fluorescent Probes for Competitive Binding Studies of Macrophage Migration Inhibitory Factor." Journal of Medicinal Chemistry 63, no. 20 (2020): 11920–33. http://dx.doi.org/10.1021/acs.jmedchem.0c01160.

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37

Prashant, Avula, Gazula Levi David Krupadanam, and Gutety Srimannarayana. "DDQ Oxidation of 6- or 8-Allyl-7-hydroxycoumarins. A New Synthesis of Benzodipyrandiones and Furobenzopyranones." Bulletin of the Chemical Society of Japan 65, no. 4 (1992): 1191–93. http://dx.doi.org/10.1246/bcsj.65.1191.

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38

Li, Kun, Yue Zhang, Zeyu Hong, et al. "Design, Synthesis and Fungicidal Activity of Ester Derivatives of 4-(3,4-Dichloroisothiazole) 7-Hydroxy Coumarin." Molecules 28, no. 13 (2023): 5205. http://dx.doi.org/10.3390/molecules28135205.

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The development of new fungicides is vital for safeguarding crops and ensuring sustainable agriculture. Building on our previous finding that 4-(3,4-dichloroisothiazole)-7-hydroxy coumarins can be used as fungicidal leads, 44 novel coumarin ester derivatives were designed and synthesized to evaluate whether esterification could enhance their fungicidal activity. In vitro fungicidal bioassays indicated that compound 2ai displayed good activity against Alternaria solani, Botrytis cinereal, Cercospora arachidicola, Physalospora piricola and Sclerotinia sclerotiorum, with an EC50 value ranging fro

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39

Aicolina, L. E., I. H. Leaver, and I. W. Stapleton. "Fluorescence quenching studies of the self-association in ater of fluorescent surfactants. Alkaryl-2-pyrazolines and alkyl-7-hydroxycoumarins." Dyes and Pigments 11, no. 3 (1989): 213–32. http://dx.doi.org/10.1016/0143-7208(89)80006-3.

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40

Yan, Da-Wei, Cheng-Di Huang, Hang-Hang Zheng та ін. "Meroterpene-Like α-Glucosidase Inhibitors Based on Biomimetic Reactions Starting from β-Caryophyllene". Molecules 25, № 2 (2020): 260. http://dx.doi.org/10.3390/molecules25020260.

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Background: Natural meroterpenes derived from phloroglucinols and β-caryophyllene have shown high inhibitory activity against α-glucosidase or cancer cells, however, the chemical diversity of this type of skeletons in Nature is limited. Methods: To expand the chemical space and explore their inhibitory activities against α-glucosidase (EC 3.2.1.20), we employed β-caryophyllene and some natural moieties (4-hydroxycoumarins, lawsone or syncarpic acid) to synthesize new types of meroterpene-like skeletons. All the products (including side products) were isolated and characterized by NMR, HR-MS, a

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41

Moriya, Tetsuo. "Excited-State Reactions of Coumarins in Aqueous Solutions. VI. Fluorescence Quenching of 7-Hydroxycoumarins by Chloride Ions in Acidic Solutions." Bulletin of the Chemical Society of Japan 61, no. 3 (1988): 753–59. http://dx.doi.org/10.1246/bcsj.61.753.

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42

Kirkiacharian, Serge, Anh Tuan Lormier, Henri Chidiack, Françoise Bouchoux та Evelyne Cérède. "Synthesis and binding affinity to human α and β estrogen receptors of various 7-hydroxycoumarins substituted at 4- and 3,4- positions". Il Farmaco 59, № 12 (2004): 981–86. http://dx.doi.org/10.1016/j.farmac.2004.08.004.

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43

Ganguly, Nemai C., Arun K. Sukai, Sanjoy Dutta, and Prithwiraj De. "ChemInform Abstract: Mitsunobu Coupling of 7-Hydroxycoumarins with Allylic and Propargylic Alcohols: A Facile Direct Access to Tertiary Allyl Coumarinyl Ethers." ChemInform 33, no. 18 (2010): no. http://dx.doi.org/10.1002/chin.200218130.

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44

PRASHANT, A., G. L. D. KRUPADANAM, and G. SRIMANNARAYANA. "ChemInform Abstract: DDQ Oxidation of 6- or 8-Allyl-7-hydroxycoumarins. A New Synthesis of Benzodipyrandiones (II) and (V) and Furobenzopyranones." ChemInform 23, no. 31 (2010): no. http://dx.doi.org/10.1002/chin.199231185.

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45

M, Bashir,, and Usman, R. A. "Antibacterial Potentials of Methanol Extract of Acalypha wilkesiana Leaves on Selected Foodborne Pathogens." BIMA JOURNAL OF SCIENCE AND TECHNOLOGY GOMBE 9, no. 1A (2025): 120–28. https://doi.org/10.64290/bima.v9i1a.890.

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ABSTRACT Acalypha wilkesiana is one of the weed plants with many potential metabolites that are important medicinally. This study aimed to investigate the antibacterial activity of A. wilkesiana methanol leaves extract against some food-borne pathogens and identify its metabolites. The agar well diffusion method was used to study the growth inhibition of four (4) bacterial species; Staphylococcus aureus, Bacillus cereus, Salmonella spp, and Escherichia coli with an initial concentration of 250 µg/ml methanol leaves extract of A. wilkesiana and final concentration of 2000 µg/ml. The agar well d

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46

Bogan, Declan P., Ciaran F. Duffy, and Richard O'Kennedy. "In vitro glucuronidation of 7-hydroxycoumarin and determination of 7-hydroxycoumarin and 7-hydroxycoumarin glucuronide by capillary electrophoresis." Journal of Chromatography A 772, no. 1-2 (1997): 321–26. http://dx.doi.org/10.1016/s0021-9673(97)00063-0.

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47

Ovcharenko, Valentyn, Peter Zhminko, Olena Reshavska, and Evgen Slastya. "Toxic properties of 7-hydroxycoumarine." Toxicology Letters 180 (October 2008): S172. http://dx.doi.org/10.1016/j.toxlet.2008.06.282.

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48

Krikštaponis, Arūnas, Gintaras Urbelis, and Rolandas Meškys. "The First Step of Biodegradation of 7-Hydroxycoumarin in Pseudomonas mandelii 7HK4 Depends on an Alcohol Dehydrogenase-Type Enzyme." International Journal of Molecular Sciences 22, no. 4 (2021): 1552. http://dx.doi.org/10.3390/ijms22041552.

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Coumarins are well known secondary metabolites widely found in various plants. However, the degradation of these compounds in the environment has not been studied in detail, and, especially, the initial stages of the catabolic pathways of coumarins are not fully understood. A soil isolate Pseudomonas mandelii 7HK4 is able to degrade 7-hydroxycoumarin (umbelliferone) via the formation of 3-(2,4-dihydroxyphenyl)propionic acid, but the enzymes catalyzing the α-pyrone ring transformations have not been characterized. To elucidate an upper pathway of the catabolism of 7-hydroxycoumarin, 7-hydroxyco

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49

Bogan, Declan P., R. D. Thornes, M. Tegtmeier, E. A. Schafer, and Richard O'Kennedy. "Direct determination of 7-hydroxycoumarin and 7-hydroxycoumarin-glucuronide in urine by using capillary electrophoresis." Analyst 121, no. 2 (1996): 243. http://dx.doi.org/10.1039/an9962100243.

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