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Journal articles on the topic 'Aromatic compounds hydroxylation'

Author: Grafiati

Published: 9 October 2021

Last updated: 30 July 2025

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1

Ullrich, René, and Martin Hofrichter. "Enzymatic hydroxylation of aromatic compounds." Cellular and Molecular Life Sciences 64, no. 3 (2007): 271–93. http://dx.doi.org/10.1007/s00018-007-6362-1.

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2

Abood, Amira, Ahmed Al-Fahad, Alan Scott, et al. "Kinetic characterisation of the FAD dependent monooxygenase TropB and investigation of its biotransformation potential." RSC Advances 5, no. 62 (2015): 49987–95. http://dx.doi.org/10.1039/c5ra06693j.

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3

SAFARI, NASSER, FARZAD BAHADORAN, MOHAMMAD REZA HOSEINZADEH, and REZA GHIASI. "Cytochrome P-450 model reaction: effects of substitution on the rate of aromatic hydroxylation." Journal of Porphyrins and Phthalocyanines 04, no. 03 (2000): 285–91. http://dx.doi.org/10.1002/(sici)1099-1409(200004/05)4:3<285::aid-jpp215>3.0.co;2-r.

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The study of haemin-catalysed oxidation reactions was extended to substituted aromatic rings. Both electron-donating and electron-withdrawing substituents on aromatic rings act as para- and meta-directing agents in the presence of tetrakis(2,6-dichlorophenyl)porphyrin iron(III) chloride as catalyst and m-chloroperbenzoic acid as oxidant. A new kinetic method for measuring relative rates of epoxidation of alkenes and related compounds has been developed; while steric hindrance results in decreasing the rate of hydroxylation, electron-rich and electron-withdrawing substituents were found to incr

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4

Capocasa, Giorgio, Giorgio Olivo, Alessia Barbieri, Osvaldo Lanzalunga, and Stefano Di Stefano. "Direct hydroxylation of benzene and aromatics with H2O2 catalyzed by a self-assembled iron complex: evidence for a metal-based mechanism." Catalysis Science & Technology 7, no. 23 (2017): 5677–86. http://dx.doi.org/10.1039/c7cy01895a.

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5

Holland, Herbert L., Benito Munoz, and Timothy R. B. Jones. "Side chain hydroxylation of aromatic compounds by fungi." Bioorganic Chemistry 16, no. 4 (1988): 388–93. http://dx.doi.org/10.1016/0045-2068(88)90024-7.

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6

Neufeld, Katharina, Jan Marienhagen, Ulrich Schwaneberg, and Jörg Pietruszka. "Benzylic hydroxylation of aromatic compounds by P450 BM3." Green Chemistry 15, no. 9 (2013): 2408. http://dx.doi.org/10.1039/c3gc40838h.

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7

Knack, Daniel, Corina Hagel, Maciej Szaleniec, Agnieszka Dudzik, Aleksander Salwinski, and Johann Heider. "Substrate and Inhibitor Spectra of Ethylbenzene Dehydrogenase: Perspectives on Application Potential and Catalytic Mechanism." Applied and Environmental Microbiology 78, no. 18 (2012): 6475–82. http://dx.doi.org/10.1128/aem.01551-12.

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ABSTRACTEthylbenzene dehydrogenase (EbDH) catalyzes the initial step in anaerobic degradation of ethylbenzene in denitrifying bacteria, namely, the oxygen-independent hydroxylation of ethylbenzene to (S)-1-phenylethanol. In our study we investigate the kinetic properties of 46 substrate analogs acting as substrates or inhibitors of the enzyme. The apparent kinetic parameters of these compounds give important insights into the function of the enzyme and are consistent with the predicted catalytic mechanism based on a quantum chemical calculation model. In particular, the existence of the propos

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8

MATSUBARA, Yoshio, Shunji UEZAWA, Makoto MORISAWA, Masakuni YOSHIHARA, and Toshihisa MAESHIMA. "Direct Hydroxylation of Aromatic Compounds Using Heterogeneous Catalytic Systems." KOBUNSHI RONBUNSHU 50, no. 8 (1993): 641–44. http://dx.doi.org/10.1295/koron.50.641.

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9

Jingjit, U., C. Bouchoule, M. Blanchard, and P. Canesson. "Oxygen activation at room temperature : hydroxylation of aromatic compounds." Catalysis Today 1, no. 1-2 (1987): 81–91. http://dx.doi.org/10.1016/0920-5861(87)80029-9.

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10

Das, Vijay Kumar, Satyabrat Gogoi, Boyapati Manoranjan Choudary, and Niranjan Karak. "A promising catalyst for exclusive para hydroxylation of substituted aromatic hydrocarbons under UV light." Green Chemistry 19, no. 18 (2017): 4278–83. http://dx.doi.org/10.1039/c7gc01653k.

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Herein, we describe a waterborne polymer/carbon dot nanocomposite system as an efficient, resourceful and sustainable photocatalyst for para-selective hydroxylation of substituted aromatic compounds using H<sub>2</sub>O<sub>2</sub> under UV light.

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11

Shul'pin, Georgiy B., Mikhail M. Vinogradov, and Lidia S. Shul'pina. "Oxidative functionalization of C–H compounds induced by the extremely efficient osmium catalysts (a review)." Catalysis Science & Technology 8, no. 17 (2018): 4287–313. http://dx.doi.org/10.1039/c8cy00659h.

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In recent years, osmium complexes have found applications not only in thecis-hydroxylation of olefins but also very efficient in the oxygenation of C–H compounds (saturated and aromatic hydrocarbons and alcohols) by hydrogen peroxide as well as organic peroxides.

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12

Holland, Herbert L., Eleanor J. Bergen, P. Chinna Chenchaiah, et al. "Side chain hydroxylation of aromatic compounds by fungi.: 1. Products and stereochemistry." Canadian Journal of Chemistry 65, no. 3 (1987): 502–7. http://dx.doi.org/10.1139/v87-087.

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The fungus Mortierellaisabellina can convert ethylbenzene and a number of para-substituted derivatives to the corresponding optically active 1-phenylethanols with enantiomeric excesses between 5 and 40% and chemical yields up to 45%. 2-Ethylnaphthalene, 2-ethylthiophene, and n-propylbenzene were similarly converted, as were the bicyclic compounds indane and tetralin. In most cases, the R absolute configuration of product predominated. The fungi Cunninghamellaechinulata var. elegans and Helminthosporium species are also capable of performing some of these transformations. M. isabellina and C. e

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13

Sato, Koichi, Taka-aki Hanaoka, Shu-ichi Niwa, Ciocilteu Stefan, Takemi Namba, and Fujio Mizukami. "Direct hydroxylation of aromatic compounds by a palladium membrane reactor." Catalysis Today 104, no. 2-4 (2005): 260–66. http://dx.doi.org/10.1016/j.cattod.2005.03.067.

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14

Brose, Thomas, Felix Holzscheiter, Gunter Mattersteig, Wilhelm Pritzkow, and Volkmar Voerckel. "Vicarious Nucleophilic Hydroxylation of aromatic nitro compounds with organic hydroperoxides." Journal f�r Praktische Chemie/Chemiker-Zeitung 334, no. 6 (1992): 497–504. http://dx.doi.org/10.1002/prac.19923340609.

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15

Neufeld, Katharina, Jan Marienhagen, Ulrich Schwaneberg, and Joerg Pietruszka. "ChemInform Abstract: Benzylic Hydroxylation of Aromatic Compounds by P450 BM3." ChemInform 45, no. 1 (2013): no. http://dx.doi.org/10.1002/chin.201401030.

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16

JAYATI, SENGUPTA, and H. DUNCAN LYNGDOH R. "Comparison of the Relative Physicochemical Role of Parent, Proximate and Ultimate Carcinogenic Forms of Aromatic Amines : A Semiempirical Molecular Orbital Study." Journal of Indian Chemical Society Vol. 74, Feb 1997 (1997): 119–22. https://doi.org/10.5281/zenodo.5875226.

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Institute of Self Organising System and Biophysics, North-Eastern Hill University. Mawlai, Shillong-793 022 Department of Chemistry. North-Eastern Hill University, Shillong· 793 003 <em>Manuscript received 28 May 1995, revised 17 July 1995, accepted 14 August 1995</em> It is widely beleived that <em>N</em>-hydroxylation of the parent aromatic a mines is the key activation pathway for carcinogenesis, leading to formation of ultimate carcinogen via arylhydroximic acids as proximate carcinogen. The candidate ultimate carcinogens for aromatic amines are the electrophilic arylnitrenium ions.

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17

Borges, Rosivaldo S., Ivanete C. Palheta, Sirlene S. B. Ota, et al. "Toward of Safer Phenylbutazone Derivatives by Exploration of Toxicity Mechanism." Molecules 24, no. 1 (2019): 143. http://dx.doi.org/10.3390/molecules24010143.

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A drug design for safer phenylbutazone was been explored by reactivity and docking studies involving single electron transfer mechanism, as well as toxicological predictions. Several approaches about its structural properties were performed through quantum chemistry calculations at the B3LYP level of theory, together with the 6-31+G(d,p) basis sets. Molecular orbital and ionization potential were associated to electron donation capacity. The spin densities contribution showed a preferential hydroxylation at the para-positions of phenyl ring when compared to other positions. In addition, on ele

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18

Munir, Widad A., and J. Barrett. "The metabolism of xenobiotic compounds by Hymenolepis diminuta (Cestoda: Cyclophyllidea)." Parasitology 91, no. 1 (1985): 145–56. http://dx.doi.org/10.1017/s0031182000056584.

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The hydrolytic, reductive and oxidative enzyme systems involved in the phase I biotrans formation of xenobiotic compounds have been investigated in Hymenolepis diminuta. Adult H. diminuta are able to carry out a range of hydrolytic and reductive reactions, but in common with other helminths oxidative detoxification reactions were absent (oxidative demethylation, aniline hydroxylation, nitrobenzene hydroxylation, biphenyl hydroxylation). These oxidative reactions were readily demonstrated in rat liver. Extracts of H. diminuta hydrolysed nitrophenylphosphates and inorganic pyrophosphate, but not

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19

Cui, Futong, and David Dolphin. "Iron porphyrin catalyzed oxidation of lignin model compounds: oxidation of phenylpropane and phenylpropene model compounds." Canadian Journal of Chemistry 73, no. 12 (1995): 2153–57. http://dx.doi.org/10.1139/v95-267.

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The oxidation of 1-(4-ethoxy-3-methoxyphenyl)propane (2) and 1-(4-ethoxy-3-methoxyphenyl)propene (3) by meso-tetra(2,6-dichloro-3-sulphonatophenyl)porphyrin iron chloride (TDCSPPFeCl, 1) and tert-butylhydroperoxide (t-BuOOH) are discussed. In addition to a Cα-hydroxylation product, demethoxylation and direct aromatic ring cleavage products were found in the oxidation of 2. When 3 was oxidized by 1 and t-BuOOH in aqueous acetonitrile, an acetonitrile-incorporated product was found. A mechanism for the oxidation of 3 is proposed. Keywords: lignin, ligninase, iron porphyrin, model, degradation.

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20

Ghani, Nurunajah Ab, Nor Hadiani Ismail, Yoshiaki Noma, and Yoshinori Asakawa. "Microbial Transformation of Some Natural and Synthetic Aromatic Compounds by Fungi: Aspergillus and Neurospora Strains." Natural Product Communications 12, no. 8 (2017): 1934578X1701200. http://dx.doi.org/10.1177/1934578x1701200822.

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Microbial transformation of chalcone (1), 4-hydroxychalcone (2) and 4′-hydroxychalcone (3), 1,1-diphenylmethane (4), 1,3-diphenylacetone (5), 1,3-diphenylpropane (6), bibenzyl (7), ( E)-stilbene (8a)- and ( Z)-stilbenes (8b), and phenylcyclohexane (9), (1 R,2 S)-1-phenyl-2-hydroxycyclohexane (9a) and (1 S,2 R)-1-phenyl-2-hydroxycyclohexane (9b), and a naturally occurring bis-bibenzyl, marchantin A (10) were performed by using Aspergillus niger TBUYN-2 and the other Aspergillus strains, and Neurospora crassa which were capable to hydrogenation and epoxidation of a conjugated double bond, and di

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21

Mithaishvili, Teimuraz, René Scalla, Devi Ugrekhelidze, Benedict Tsereteli, Tinatin Sadunishvili, and George Kvesitadze. "Degradation of Aromatic Compounds in Plants Grown under Aseptic Conditions." Zeitschrift für Naturforschung C 60, no. 1-2 (2005): 97–102. http://dx.doi.org/10.1515/znc-2005-1-218.

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The aim of the work is to investigate the ability of higher plants to absorb and detoxify environmental pollutants - aromatic compounds via aromatic ring cleavage. Transformation of 14C specifically labelled benzene derivatives, [1-6-14C]-nitrobenzene, [1-6-14C]-aniline, [1-14C]- and [7-14C]-benzoic acid, in axenic seedlings of maize (Zea mays L.), kidney bean (Phaseolus vulgaris L.), pea (Pisum sativum L.) and pumpkin (Cucurbita pepo L.) were studied. After penetration in plants, the above xenobiotics are transformed by oxidative or reductive reactions, conjugation with cell endogenous compou

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22

Song, Jinna, Xihe Bi, Qi Zhang, Kaki Raveendra Babu, and Zhouliang Huang. "Visible-Light-Induced Radical Polynitration of Arylboronic Acids: Synthesis of Polynitrophenols." Synthesis 50, no. 15 (2018): 2891–96. http://dx.doi.org/10.1055/s-0037-1610038.

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We report a visible light-assisted one-pot method for the synthesis of polynitrophenols through radical tandem hydroxylation and nitration of arylboronic acids by utilizing copper(II) nitrate trihydrate as the nitro source. This method features mild conditions, a simple procedure, and good functional group tolerance. Compared to conventional methods, this work provides a straightforward approach for the polynitration of aromatic compounds.

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23

Pelttari, Eila, Eliisa Karhumäki, Jane Langshaw, Hannu Peräkylä, and Hannu Elo. "Antimicrobial Properties of Substituted Salicylaldehydes and Related Compounds." Zeitschrift für Naturforschung C 62, no. 7-8 (2007): 487–97. http://dx.doi.org/10.1515/znc-2007-7-806.

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A systematic survey of the antimicrobial properties of substituted salicylaldehydes and some related aromatic aldehydes is reported. A total of 23 different compounds, each at four different concentrations, were studied using a panel of seven microbes (Aspergillus niger, Bacillus cereus, Candida albicans, Escherichia coli, Pseudomonas aeruginosa, Saccharomyces cerevisiae and Staphylococcus epidermidis) and employing the paper disc agar diffusion method. Several aldehydes, most notably halogenated, nitro-substituted and hydroxylated salicylaldehydes, displayed highly potent activity against the

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24

Spatafora, Carmela, Giuseppina Basini, Laura Baioni, Francesca Grasselli, Alfio Sofia, and Corrado Tringali. "Antiangiogenic Resveratrol Analogues by Mild m-CPBA Aromatic Hydroxylation of 3,5-Dimethoxystilbenes." Natural Product Communications 4, no. 2 (2009): 1934578X0900400. http://dx.doi.org/10.1177/1934578x0900400215.

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A mild treatment of the resveratrol analogue 3,5,4′-trimethoxystilbene 2 with m-CPBA afforded two hydroxylated methoxystilbenes 5 and 6 by direct aromatic hydroxylation. A similar protocol was applied to other stilbenes bearing a 3,5-dimethoxy moiety, namely tetramethoxystilbenes 7 and 10 to obtain respectively the hydroxylated analogues 8, 9 and 11, 12. The substrate 2 and the new compounds 5, 8 and 11 were evaluated as anti-angiogenic agents and proved significantly active in the range 1 – 100 μM.

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25

Semba, H., and K. Sakano. "A para -site-specific hydroxylation of aromatic compounds by Mycobacterium sp. strain 12523: stabilization of the hydroxylation activity." Applied Microbiology and Biotechnology 48, no. 2 (1997): 256–60. http://dx.doi.org/10.1007/s002530051047.

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26

Miyamoto, Takaki, Jeanielle Amurao, Eiji Minami, and Haruo Kawamoto. "Decomposition Mechanisms of Lignin-Related Aromatic Monomers in Solution Plasma." Plasma 8, no. 2 (2025): 14. https://doi.org/10.3390/plasma8020014.

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Lignin is a natural aromatic macromolecule present in wood and an abundant resource on Earth, yet it is hardly used. In this study, an aqueous solution plasma treatment was investigated for the catalyst-free production of valuable chemicals from lignin. To elucidate the decomposition mechanism, the aqueous solution plasma treatment was applied to the fundamental lignin aromatic model compounds—phenol, guaiacol, and syringol. The results showed that the decomposition rate followed the order syringol > guaiacol > phenol, indicating that electron-donating methoxy groups enhance reactivity.

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27

Cheng, Xiong, and Dujie Hou. "Characterization of Severely Biodegraded Crude Oils Using Negative-Ion ESI Orbitrap MS, GC-NCD and GC-SCD: Insights into Heteroatomic Compounds Biodegradation." Energies 14, no. 2 (2021): 300. http://dx.doi.org/10.3390/en14020300.

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A slightly and two severely biodegraded crude oils with the same origin were analysed using negative-ion electrospray ionization Orbitrap mass spectrometry (ESI Orbitrap MS), gas chromatography-nitrogen chemiluminescence detector (GC-NCD), and GC-sulfur chemiluminescence detector (GC-SCD) to investigate the composition of heteroatomic compounds and their fate during severe biodegradation and to provide insights into biodegradation pathway of hopanes, nitrogen- and sulfur-containing compounds. Twelve heteroatomic compound classes, including O1–O5, N1, N2, N1O1–N1O3, N1S1 and O3S1, were detected

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28

Cheng, Xiong, and Dujie Hou. "Characterization of Severely Biodegraded Crude Oils Using Negative-Ion ESI Orbitrap MS, GC-NCD and GC-SCD: Insights into Heteroatomic Compounds Biodegradation." Energies 14, no. 2 (2021): 300. http://dx.doi.org/10.3390/en14020300.

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A slightly and two severely biodegraded crude oils with the same origin were analysed using negative-ion electrospray ionization Orbitrap mass spectrometry (ESI Orbitrap MS), gas chromatography-nitrogen chemiluminescence detector (GC-NCD), and GC-sulfur chemiluminescence detector (GC-SCD) to investigate the composition of heteroatomic compounds and their fate during severe biodegradation and to provide insights into biodegradation pathway of hopanes, nitrogen- and sulfur-containing compounds. Twelve heteroatomic compound classes, including O1–O5, N1, N2, N1O1–N1O3, N1S1 and O3S1, were detected

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29

Skibiński, Robert, Jakub Trawiński, and Maciej Gawlik. "Characterization of Phase I Hepatic Metabolites of Anti-Premature Ejaculation Drug Dapoxetine by UHPLC-ESI-Q-TOF." Molecules 26, no. 13 (2021): 3794. http://dx.doi.org/10.3390/molecules26133794.

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Determination of the metabolism pathway of xenobiotics undergoing the hepatic pass is a crucial aspect in drug development since the presence of toxic biotransformation products may result in significant side effects during the therapy. In this study, the complete hepatic metabolism pathway of dapoxetine established according to the human liver microsome assay with the use of a high-resolution LC–MS system was described. Eleven biotransformation products of dapoxetine, including eight metabolites not reported in the literature so far, were detected and identified. N-dealkylation, hydroxylation

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30

Li, Qing-Shan, Jun Ogawa, Rolf D. Schmid, and Sakayu Shimizu. "Engineering Cytochrome P450 BM-3 for Oxidation of Polycyclic Aromatic Hydrocarbons." Applied and Environmental Microbiology 67, no. 12 (2001): 5735–39. http://dx.doi.org/10.1128/aem.67.12.5735-5739.2001.

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ABSTRACT Cytochrome P450 BM-3, a self-sufficient P450 enzyme fromBacillus megaterium that catalyzes the subterminal hydroxylation of long-chain fatty acids, has been engineered into a catalyst for the oxidation of polycyclic aromatic hydrocarbons. The activities of a triplet mutant (A74G/F87V/L188Q) towards naphthalene, fluorene, acenaphthene, acenaphthylene, and 9-methylanthracene were 160, 53, 109, 287, and 22/min, respectively. Compared with the activities of the wild type towards these polycyclic aromatic hydrocarbons, those of the mutant were improved by up to 4 orders of magnitude. The c

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31

Jung, Yeon Jung, Byung Soo Oh, Kyoung Suk Kim, Minoru Koga, Ryota Shinohara, and Joon-Wun Kang. "The degradation of diethyl phthalate (DEP) during ozonation: oxidation by-products study." Journal of Water and Health 8, no. 2 (2009): 290–98. http://dx.doi.org/10.2166/wh.2009.301.

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The degradation of diethyl phthalate (DEP) in an aqueous solution during ozonation was investigated by identifying the oxidation intermediates using GC–MS. The experiments were carried out in semi-batch mode with a 1.5 mg l−1-min ozone dose. The proposed degradation pathways were divided into hydrolysis of the aliphatic chain (pathway (A)) and hydroxylation resulting from ∙OH attack in the aromatic ring (pathway (B)). With increasing ozone dose, the aromatic ring of DEP was opened and acidic compounds, such as malonic acid, succinic acid and glutaric acid were formed. In addition, the ozonatio

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32

Kharitonov, Aleksandr S., Vladimir I. Sobolev, and Gennadii I. Panov. "Hydroxylation of aromatic compounds with nitrous oxide. New possibilities of oxidative catalysis on zeolites." Russian Chemical Reviews 61, no. 11 (1992): 1130–39. http://dx.doi.org/10.1070/rc1992v061n11abeh001021.

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33

Ensley, Harry E., P. Balakrishnan, and Christopher Hogan. "Unusual aromatic hydroxylation in the photooxygenation of 1-isopropylidene-2-indanone and related compounds." Tetrahedron Letters 30, no. 13 (1989): 1625–28. http://dx.doi.org/10.1016/s0040-4039(00)99537-6.

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Semba, H., M. Mukouyama, and K. Sakano. "A para -site-specific hydroxylation of various aromatic compounds by Mycobacterium sp. strain 12523." Applied Microbiology and Biotechnology 46, no. 4 (1996): 432–37. http://dx.doi.org/10.1007/s002530050841.

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35

Montgomery, Jane, Line Ste-Marie, Daniel Boismenu, and Luc Vachon. "Hydroxylation of aromatic compounds as indices of hydroxyl radical production: A cautionary note revisited." Free Radical Biology and Medicine 19, no. 6 (1995): 927–33. http://dx.doi.org/10.1016/0891-5849(95)02004-t.

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36

Semba, H., M. Mukouyama, and K. Sakano. "A para-site-specific hydroxylation of various aromatic compounds by Mycobacterium sp. strain 12523." Applied Microbiology and Biotechnology 46, no. 4 (1996): 432–37. http://dx.doi.org/10.1007/bf00166241.

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37

Wang, Xiao, Tianyong Zhang, Bin Li, Qiusheng Yang, and Shuang Jiang. "Efficient hydroxylation of aromatic compounds catalyzed by an iron(II) complex with H2 O2." Applied Organometallic Chemistry 28, no. 9 (2014): 666–72. http://dx.doi.org/10.1002/aoc.3178.

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38

Wong, T. S., N. Wu, D. Roccatano, M. Zacharias, and U. Schwaneberg. "Sensitive Assay for Laboratory Evolution of Hydroxylases toward Aromatic and Heterocyclic Compounds." Journal of Biomolecular Screening 10, no. 3 (2005): 246–52. http://dx.doi.org/10.1177/1087057104273336.

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Powerful directed evolution methods have been developed for tailoring proteins to our needs in industrial applications. Here, the authors report a medium-throughput assay system designed for screening mutant libraries of oxygenases capable of inserting a hydroxyl group into a C-H bond of aromatic or O-heterocyclic compounds and for exploring the substrate profile of oxygenases. The assay system is based on 4-aminoantipyrine (4-AAP), a colorimetric phenol detection reagent. By using 2 detection wavelengths (509 nm and 600 nm), the authors achieved a linear response from 50 to 800 μM phenol and

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39

Fang, Mengyuan, Tianhui Zhao, Xiaoli Zhao, et al. "Effect of Tube Diameters and Functional Groups on Adsorption and Suspension Behaviors of Carbon Nanotubes in Presence of Humic Acid." Nanomaterials 12, no. 9 (2022): 1592. http://dx.doi.org/10.3390/nano12091592.

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The adsorption and suspension behaviors of carbon nanotubes (CNTs) in the water environment determine the geochemical cycle and ecological risk of CNTs and the compounds attached to them. In this study, CNTs were selected as the research object, and the effect of tube diameters and functional groups (multiwall CNTs (MWNTs) and hydroxylated MWNTs (HMWNTs)) on the adsorption and suspension behaviors of the CNTs in the presence of humic acid (HA) was systematically analyzed. The results indicate that HA adsorption decreased with the increase in the solution pH, and the adsorption amount and rate

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40

Pereira, Wilfred E., Colleen E. Rostad, David M. Updegraff, and Jon L. Bennett. "Microbial Transformations of Azaarenes in Creosote-Contaminated Soil and Ground Water: Laboratory and Field Studies." Water Science and Technology 20, no. 11-12 (1988): 17–23. http://dx.doi.org/10.2166/wst.1988.0261.

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Azaarenes or aromatic nitrogen heterocycles are a class of compounds found in wood-preservative wastes containing creosote. The fate and movement of these compounds in contaminated aquifers is not well understood. Water-quality studies in an aquifer contaminated with creosote near Pensacola, Florida, indicated that ground water was contaminated with several azaarenes and their oxygenated and alkylated derivatives, suggesting that these oxygenated compounds may be products of microbial transformation reactions. Accordingly, laboratory studies were designed to investigate the fate of these compo

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41

Heine, Thomas, Willem van Berkel, George Gassner, Karl-Heinz van Pée, and Dirk Tischler. "Two-Component FAD-Dependent Monooxygenases: Current Knowledge and Biotechnological Opportunities." Biology 7, no. 3 (2018): 42. http://dx.doi.org/10.3390/biology7030042.

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Flavoprotein monooxygenases create valuable compounds that are of high interest for the chemical, pharmaceutical, and agrochemical industries, among others. Monooxygenases that use flavin as cofactor are either single- or two-component systems. Here we summarize the current knowledge about two-component flavin adenine dinucleotide (FAD)-dependent monooxygenases and describe their biotechnological relevance. Two-component FAD-dependent monooxygenases catalyze hydroxylation, epoxidation, and halogenation reactions and are physiologically involved in amino acid metabolism, mineralization of aroma

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42

KHARITONOV, A. S., V. I. SOBOLEV, and G. I. PANOV. "ChemInform Abstract: Hydroxylation of Aromatic Compounds by Nitrous Oxide. New Possibilities of Oxidative Zeolite Catalysis." ChemInform 24, no. 44 (2010): no. http://dx.doi.org/10.1002/chin.199344317.

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Doddema, H. J. "Site-specific hydroxylation of aromatic compounds by polyphenol oxidase in organic solvents and in water." Biotechnology and Bioengineering 32, no. 5 (1988): 716–18. http://dx.doi.org/10.1002/bit.260320518.

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Wang, Xiao, Tianyong Zhang, Bin Li, Qiusheng Yang, and Shuang Jiang. "ChemInform Abstract: Efficient Hydroxylation of Aromatic Compounds Catalyzed by an Iron(II) Complex with H2O2." ChemInform 46, no. 7 (2015): no. http://dx.doi.org/10.1002/chin.201507041.

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Gesell, Manuela, Elke Hammer, Michael Specht, Wittko Francke, and Frieder Schauer. "Biotransformation of Biphenyl by Paecilomyces lilacinus and Characterization of Ring Cleavage Products." Applied and Environmental Microbiology 67, no. 4 (2001): 1551–57. http://dx.doi.org/10.1128/aem.67.4.1551-1557.2001.

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ABSTRACT We examined the pathway by which the fungicide biphenyl is metabolized in the imperfect fungus Paecilomyces lilacinus. The initial oxidation yielded the three monohydroxylated biphenyls. Further hydroxylation occurred on the first and the second aromatic ring systems, resulting in the formation of five di- and trihydroxylated metabolites. The fungus could cleave the aromatic structures, resulting in the transformation of biphenyl viaortho-substituted dihydroxybiphenyl to six-ring fission products. All compounds were characterized by gas chromatography-mass spectroscopy and proton nucl

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Klaus, Tobias, Alexander Seifert, Tim Häbe, Bettina Nestl, and Bernhard Hauer. "An Enzyme Cascade Synthesis of Vanillin." Catalysts 9, no. 3 (2019): 252. http://dx.doi.org/10.3390/catal9030252.

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A novel approach for the synthesis of vanillin employing a three-step two-enzymatic cascade sequence is reported. Cytochrome P450 monooxygenases are known to catalyse the selective hydroxylation of aromatic compounds, which is one of the most challenging chemical reactions. A set of rationally designed variants of CYP102A1 (P450 BM3) from Bacillus megaterium at the amino acid positions 47, 51, 87, 328 and 437 was screened for conversion of the substrate 3-methylanisole to vanillyl alcohol via the intermediate product 4-methylguaiacol. Furthermore, a vanillyl alcohol oxidase (VAO) variant (F454

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Kishimoto, T., J. F. Kadla, H. m. Chang, and H. Jameel. "The Reactions of Lignin Model Compounds with Hydrogen Peroxide at Low pH." Holzforschung 57, no. 1 (2003): 52–88. http://dx.doi.org/10.1515/hf.2003.008.

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Summary In peroxymonosulfuric acid bleaching, the presence of hydrogen peroxide is dependent on the reaction conditions and the conversion ratios used to generate the peroxy acid. Substantial amounts of hydrogen peroxide may be present in the reaction system under certain conditions. An understanding of the reactions of hydrogen peroxide under these conditions would be beneficial. Therefore, several simple lignin model compounds were reacted with acidic hydrogen peroxide, pH 1-3, at 70°C. In all cases the phenolic lignin model compounds reacted much faster than their non-phenolic counterparts.

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Bensalah, Nasr, Mohamed F. Ahmadi, and Abdelatif Gadri. "Electrochemical treatment of wastewaters containing 4-nitrocathecol using boron-doped diamond anodesA paper submitted to the Journal of Environmental Engineering and Science." Canadian Journal of Civil Engineering 36, no. 4 (2009): 683–89. http://dx.doi.org/10.1139/s08-054.

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The electrochemical oxidation of aqueous wastes polluted with 4-nitrocathecol has been studied on boron-doped diamond electrodes in an acidic medium. The voltammetric results showed that 4-nitrocathecol is oxidized in the potential region where the supporting electrolyte is stable. Galvanostatic electrolysis study showed that the oxidation of these wastes in a single-compartment electrochemical flow cell with boron-doped diamond anodes results in the complete mineralization of the organics. Cathecol, benzoquinone, 4-aminocathecol, maleic and oxalic acids have been detected as soluble organics,

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Catapano, Maria Carmen, Michele Protti, Tommaso Fontana, Roberto Mandrioli, Přemysl Mladěnka, and Laura Mercolini. "An Original HPLC Method with Coulometric Detection to Monitor Hydroxyl Radical Generation via Fenton Chemistry." Molecules 24, no. 17 (2019): 3066. http://dx.doi.org/10.3390/molecules24173066.

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Hydroxyl radicals (•OH) can be generated via Fenton chemistry catalyzed by transition metals. An in vitro Fenton system was developed to test both the inhibition and stimulation of •OH formation, by monitoring salicylate aromatic hydroxylation derivatives as markers of •OH production. The reaction was optimized with either iron or copper, and target analytes were determined by means of an original HPLC method coupled to coulometric detection. The method granted good sensitivity and precision, while method applicability was tested on antioxidant compounds with and without chelating properties i

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Fessner, Nico D., Christopher Grimm, Wolfgang Kroutil, and Anton Glieder. "Late-Stage Functionalisation of Polycyclic (N-Hetero-) Aromatic Hydrocarbons by Detoxifying CYP5035S7 Monooxygenase of the White-Rot Fungus Polyporus arcularius." Biomolecules 11, no. 11 (2021): 1708. http://dx.doi.org/10.3390/biom11111708.

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Functionalisation of polycyclic aromatic hydrocarbons (PAHs) and their N-heteroarene analogues (NPAHs) is a tedious synthetic endeavour that requires diverse bottom-up approaches. Cytochrome P450 enzymes of white-rot fungi were shown to participate in the fungal detoxification of xenobiotics and environmental hazards via hydroxylation of PAH compounds. In this paper, the recently discovered activity of the monooxygenase CYP5035S7 towards (N)PAHs was investigated in detail, and products formed from the substrates azulene, acenaphthene, fluorene, anthracene, and phenanthrene by whole-cell biocat

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