Relevant bibliographies by topics / Naphthoquinone

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Academic literature on the topic 'Naphthoquinone'

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Published: 4 June 2021
Last updated: 25 May 2024

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Journal articles on the topic "Naphthoquinone"

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Córdova-Rivas, Sergio, Jorge Gustavo Araujo-Huitrado, Ernesto Rivera-Avalos, Ismailia L. Escalante-García, Sergio M. Durón-Torres, Yamilé López-Hernández, Hiram Hernández-López, Lluvia López, Denisse de Loera, and Jesús Adrián López. "Differential Proliferation Effect of the Newly Synthesized Valine, Tyrosine and Tryptophan–Naphthoquinones in Immortal and Tumorigenic Cervical Cell Lines." Molecules 25, no. 9 (April 28, 2020): 2058. http://dx.doi.org/10.3390/molecules25092058.

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We previously showed that microwave assisted synthesis is the best method for the synthesis of naphthoquinone amino acid and chloride-naphthoquinone amino acid derivatives by a complete evaluation of reaction conditions such as stoichiometry, bases, and pH influence. Following the same strategy, we synthesized chloride and non-chloride tyrosine, valine, and tryptophan-naphthoquinones achieving 85–95%, 80–92%, and 91–95% yields, respectively. The cyclic voltammetry profiles showed that both series of naphthoquinone amino acid derivatives mainly display one redox reaction process. Overall, chloride naphthoquinone amino acid derivatives exhibited redox potential values (E1/2) more positive than non-chloride compounds. The six newly synthesized compounds were tested in HPV positive and negative as well as in immortal and tumorigenic cell lines to observe the effects in different cellular context simulating precancerous and cancerous status. A dose-response was achieved to determine the IC50 of six newly synthesized compounds in SiHa (Tumorigenic and HPV16 positive), CaLo (Tumorigenic and HPV18 positive), C33-A (Tumorigenic and HPV negative) and HaCaT (Keratinocytes immortal HPV negative) cell lines. Non-chloride tryptophan-naphthoquinone (3c) and chloride tyrosine-naphthoquine (4a) effects were more potent in tumorigenic SiHa, CaLo, and C33-A cells with respect to non-tumorigenic HaCaT cells. Interestingly, there seems to be a differential effect in non-chloride and chloride naphthoquinone amino acid derivatives in tumorigenic versus non tumorigenic cells. Considering all naphthoquinone amino acid derivatives that our group synthesized, it seems that hydrophobic and aromatic amino acids have the greatest effect on cell proliferation inhibition. These results show promising compounds for cervical cancer treatment.
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Buffinton, G. D., K. Öllinger, A. Brunmark, and E. Cadenas. "DT-diaphorase-catalysed reduction of 1,4-naphthoquinone derivatives and glutathionyl-quinone conjugates. Effect of substituents on autoxidation rates." Biochemical Journal 257, no. 2 (January 15, 1989): 561–71. http://dx.doi.org/10.1042/bj2570561.

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DT-diaphorase catalysed the reduction of 1,4-naphthoquinones with hydroxy, methyl, methoxy and glutathionyl substituents at the expense of reducing equivalents from NADPH. The initial rates of quinone reduction did not correlate with either the half-wave reduction potential (E1/2) value (determined by h.p.l.c. with electrochemical detection against an Ag/AgCl reference electrode) or the partition coefficient of the quinones. After their reduction by DT-diaphorase the 1,4-naphthoquinone derivatives autoxidized at distinct rates, the extent of which was influenced by the nature of the substituents. Thus for the 1,4-naphthoquinone series the following order of rate of autoxidation was found: 5-hydroxy-1,4-naphthoquinone greater than 3-glutathionyl-1,4-naphthoquinone greater than 5-hydroxy-3-glutathionyl-1,4-naphthoquinone greater than 1,4-naphthoquinone greater than 2-hydroxy-1,4-naphthoquinone. For the 2-methyl-1,4-naphthoquinone (menadione) series the following order was observed: 5-hydroxy-2-methyl-1,4-naphthoquinone greater than 3-glutathionyl-5-hydroxy-2-methyl-1,4-naphthoquinone greater than 3-glutathionyl-2-methyl-1,4-naphthoquinone greater than 2-methyl-1,4-naphthoquinone greater than 3-hydroxy-2-methyl-1,4-naphthoquinone. The autoxidized naphthohydroquinone derivatives were re-reduced by DT-diaphorase, thus closing a cycle of enzymic reduction in equilibrium autoxidation. This was expressed as an excess of NADPH oxidized over the initial concentration of quinone present as well as H2O2 formation. These findings demonstrate that glutathionyl conjugates of 1,4-naphthoquinone and 2-methyl-1,4-naphthoquinone and those of their respective 5-hydroxy derivatives are able to act as substrates for DT-diaphorase and that they also autoxidize at rates higher than those for the unsubstituted parent compounds. These results are discussed in terms of the cellular role of DT-diaphorase in the reduction of hydroxy- or glutathionyl-substituted naphthoquinones as well as the further conjugation of these hydroquinones with glucuronide or sulphate within the cellular milieu, thereby facilitating their disposal from the cells.
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Liu, Rui, and Hong Li. "Structural Modification of 1,4-Naphthoquinone Molecule for Application in Dyeing." Advanced Materials Research 781-784 (September 2013): 979–82. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.979.

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Quinones are useful compounds as dye compounds and the 1,4-naphthoquinone structure constitutes an essential part of these classes of compounds. The process in constructing 1,4-naphthoquinone for possible screening as dyestuff is described, starting from 1,4-naphthoquinone and hydroxy acid. It provides a novel methodology for the synthesis of the 5-nitro-2-substituted 1,4-naphthoquinones. The products were characterized by IR and1H NMR.
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Rudnicka, Małgorzata, Michał Ludynia, and Waldemar Karcz. "Effects of Naphthazarin (DHNQ) Combined with Lawsone (NQ-2-OH) or 1,4-Naphthoquinone (NQ) on the Auxin-Induced Growth of Zea mays L. Coleoptile Segments." International Journal of Molecular Sciences 20, no. 7 (April 11, 2019): 1788. http://dx.doi.org/10.3390/ijms20071788.

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Naphthoquinones, plants secondary metabolites are known for their antibacterial, antifungal, anti-inflammatory, anti-cancer and anti-parasitic properties. The biological activity of naphthoquinones is connected with their ability to generate reactive oxygen species and to modify biological molecules at their nucleophilic sites. In our research, the effect of naphthazarin (DHNQ) combined with 2-hydroxy-1,4-naphthoquinone (NQ-2-OH) or 1,4-naphthoquinone (1,4-NQ) on the elongation growth, pH changes of the incubation medium, oxidative stress and redox activity of maize coleoptile cells were investigated. This paper describes experiments performed with maize (Zea mays L.) coleoptile segments, which is a classical model system to study plant cell elongation growth. The data presented clearly demonstrate that lawsone and 1,4-naphthoquinone combined with naphthazarin, at low concentrations (1 and 10 nM), reduced the endogenous and IAA-induced (Indole-3-Acetic Acid) elongation growth of maize coleoptile segments. Those changes in growth correlated with the proton concentration in the incubation medium, which suggests that the changes in the growth of maize coleoptile segments observed in the presence of naphthoquinones are mediated through the activity of PM H+-ATPase. The presence of naphthoquinones induced oxidative stress in the maize coleoptile tissue by producing hydrogen peroxide and causing changes in the redox activity. Moreover, the incubation of maize segments with both naphthoquinones combined with naphthazarin resulted in lipid peroxidation and membrane damage. The regulation of PM H+-ATPase activity, especially its inhibition, may result from two major types of reaction: first, a direct interaction between an enzyme and naphthoquinone, which leads to the covalent modification of the protein thiols and the generation of thioethers, which have been found to alter the activity of the PM H+-ATPases; second, naphthoquinones induce reactive oxygen species (ROS) production, which inhibits PM H+-ATPases by increasing cytosolic Ca2+. This harmful effect was stronger when naphthazarin and 1,4-naphthoquinone were added together. Taking these results into account, it can be suggested that by combining naphthoquinones in small quantities, an alternative to synthetic pesticides could be developed.
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Ma, Qinge, Rongrui Wei, and Zhipei Sang. "Structural Characterization and Hepatoprotective Activity of Naphthoquinone From Cucumis bisexualis." Natural Product Communications 15, no. 1 (January 1, 2020): 1934578X2090289. http://dx.doi.org/10.1177/1934578x20902898.

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Three new naphthoquinones, namely 5,8-dihydroxy-7′-isopropyl-furan ring-1″-prenyl-naphthoquinone (1), 5,8-dihydroxy-7′-propenyl-furan ring-1″-isopropanol-naphthoquinone (2), and 5,8-dihydroxy-7′-isopropanol-furan ring-1″-(5″-hydroxyphenyl)-naphthoquinone (3), along with 10 known naphthoquinone derivatives (4-13) were isolated from Cucumis bisexualis for the first time. All the compounds were elucidated on the basis of spectroscopic data analysis and chemical evidence. Compounds (1-13) were evaluated for their hepatoprotective activites on human L-O2 cells. Among them, compounds 1, 4, and 8 exhibited significant promotion effects on the proliferation of L-O2 cells.
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Rivera-Ávalos, Ernesto, Denisse de Loera, Jorge Gustavo Araujo-Huitrado, Ismailia Leilani Escalante-García, Miguel Antonio Muñoz-Sánchez, Hiram Hernández, Jesús Adrián López, and Lluvia López. "Synthesis of Amino Acid–Naphthoquinones and In Vitro Studies on Cervical and Breast Cell Lines." Molecules 24, no. 23 (November 25, 2019): 4285. http://dx.doi.org/10.3390/molecules24234285.

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We performed an extensive analysis about the reaction conditions of the 1,4-Michael addition of amino acids to 1,4-naphthoquinone and substitution to 2,3-dichloronaphthoquinone, and a complete evaluation of stoichiometry, use of different bases, and the pH influence was performed. We were able to show that microwave-assisted synthesis is the best method for the synthesis of naphthoquinone–amino acid and chloride–naphthoquinone–amino acid derivatives with 79–91% and 78–91% yields, respectively. The cyclic voltammetry profiles showed that both series of naphthoquinone–amino acid derivatives mainly display one quasi-reversible redox reaction process. Interestingly, it was shown that naphthoquinone derivatives possess a selective antitumorigenic activity against cervix cancer cell lines and chloride–naphthoquinone–amino acid derivatives against breast cancer cell lines. Furthermore, the newly synthetized compounds with asparagine–naphthoquinones (3e and 4e) inhibited ~85% of SiHa cell proliferation. These results show promising compounds for specific cervical and breast cancer treatment.
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Ríos, David, Jaime A. Valderrama, Miriam Cautin, Milko Tapia, Felipe Salas, Angélica Guerrero-Castilla, Giulio G. Muccioli, Pedro Buc Calderón, and Julio Benites. "New 2-Acetyl-3-aminophenyl-1,4-naphthoquinones: Synthesis and In Vitro Antiproliferative Activities on Breast and Prostate Human Cancer Cells." Oxidative Medicine and Cellular Longevity 2020 (September 26, 2020): 1–11. http://dx.doi.org/10.1155/2020/8939716.

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The reaction of 2-acyl-1,4-naphthoquinones with N,N-dimethylaniline and 2,5-dimethoxyaniline, promoted by catalytic amounts of CeCl3·7H2O under “open-flask” conditions, produced a variety of 2-acyl-3-aminophenyl-1,4-naphthoquinones structurally related to the cytotoxic 2-acetyl-3-phenyl-1,4-naphthoquinone, an inhibitor of the heat shock chaperone protein Hsp90. The members of the 2-acyl-3-aminophenyl-1,4-naphthoquinone series were isolated in good yields (63-98%). The cyclic voltammograms of the 2-acyl-3-aminophenyl-1,4-naphthoquinone exhibit two one-electron reduction waves to the corresponding radical-anion and dianion and two quasireversible oxidation peaks. The first and second half-wave potential values (E1/2) of the members of the series are sensitive to the push-pull electronic effects of the substituents in the naphthoquinone scaffold. Furthermore, the in vitro antiproliferative properties of these new quinones were evaluated on two human cancer cells DU-145 (prostate) and MCF-7 (mammary) and a nontumorigenic HEK-293 (kidney) cell line, using the MTT colorimetric method. Two members, within the series, exhibited interesting cytotoxic activities on human prostate and mammary cancer cells.
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Kumbhar, A. S., S. B. Padhye, Jitender, and R. K. Kale. "Naturally Occurring Hydroxy Napthoquinones and Their Iron Complexes as Modulators of Radiation Induced Lipid Peroxidation in Synaptosomes." Metal-Based Drugs 4, no. 5 (1997): 279–85. http://dx.doi.org/10.1155/mbd.1997.279.

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The modulation of radiation induced lipid peroxidation in synaptosomes by iron (II) and iron (III) complexes of two naturally occurring and therapeutically relevant naphthoquinones viz. 5,hydroxy-1,4 naphthoquinone; juglone and 2,hydroxy-1,4 naphthoquinone; lawsone, have been studied. At lower concentrations the complexes enhance lipid peroxidation predominantly through redox cycling as observed for Fe(II)- juglonate while at higher concentrations the complexes tend to limit lipid peroxidation through fast recombinations.
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Raspotnig, Günther, Felix Anderl, and Ronald M. Clouse. "The scent gland chemistry of neogoveid cyphophthalmids (Opiliones): an unusual methyljuglone from Metasiro savannahensis." Chemoecology 29, no. 5-6 (September 26, 2019): 189–97. http://dx.doi.org/10.1007/s00049-019-00288-y.

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Abstract While the chemistries of scent gland secretions from a few selected species of three families of Cyphophthalmi, namely Sironidae, Pettalidae, and Stylocellidae, have already been reported and found to consist of complex blends of naphthoquinones and methyl ketones, nothing is known about the other families. We here report on the secretions of Metasiro savannahensis Clouse and Wheeler (Zootaxa 3814:177–201, 2014), a first representative of the family Neogoveidae. The secretions from males, females and one juvenile were extracted and analyzed by gas chromatography–mass spectrometry. Twenty-five compounds were identified, all of which belong to the chemical classes of naphthoquinones and methyl ketones, confirming a hypothesized chemical uniformity of cyphophthalmid exudates. One major naphthoquinone compound, however, was new for cyphophthalmids and for arthropod exocrine secretions in general: a methyljuglone isomer, 6-methyljuglone (= 6-MJ; iupac name: 5-hydroxy-6-methyl-1,4-naphthoquinone), amounted for about 20% of the secretion and was eventually identified by synthesis. Hydroxy-naphthoquinones and their derivatives are known to possess a variety of antibiotic effects, probably enhancing the antimicrobial/antifungal potential of the Metasiro-secretion. Currently, without further data on neogoveids, the compound represents a chemical autapomorphy of M. savannahensis, and—just as the strange chloro-naphthoquinones of Sironidae and Pettalidae—adds to the repertoire of unusual naphthoquinone compounds across the Cyphophthalmi.
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de Souza, Acácio S., Ruan Carlos B. Ribeiro, Dora C. S. Costa, Fernanda P. Pauli, David R. Pinho, Matheus G. de Moraes, Fernando de C. da Silva, Luana da S. M. Forezi, and Vitor F. Ferreira. "Menadione: a platform and a target to valuable compounds synthesis." Beilstein Journal of Organic Chemistry 18 (April 11, 2022): 381–419. http://dx.doi.org/10.3762/bjoc.18.43.

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Naphthoquinones are important natural or synthetic compounds belonging to the general class of quinones. Many compounds in this class have become drugs that are on the pharmaceutical market for the treatment of various diseases. A special naphthoquinone derivative is menadione, a synthetic naphthoquinone belonging to the vitamin K group. This compound can be synthesized by different methods and it has a broad range of biological and synthetic applications, which will be highlighted in this review.
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Dissertations / Theses on the topic "Naphthoquinone"

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Jones, Karen. "The basis for naphthoquinone and biguanide synergy." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368631.

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Musa, Yusuf. "Studies of 1,2-naphthoquinone mono-oximato complexes." Thesis, London Metropolitan University, 1991. http://repository.londonmet.ac.uk/3286/.

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The synthesis of 1,2-naphthoquinone I-oxime and 1,2- naphthoquinone 2-oxina complexes of rhodium and Iridium has been Investigated. In the case of rhodium, complexes of the type Rh(l-nqo)3 have been prepared by reacting 1 ,2-naphthoquinone 1-oxime with hydrated rhodium(III) chloride. Both products ware obtained as mixtures of isomers. The Interaction of 1,2- naphthoquinone 2-oxime with rhodium(lll) chloride yielded Rh(2-nqo)3 also as a mixture of Isomers. The trichelates were also obtained from the nitrosation of the appropriate naphthol in the presence of rhodium(Ill) chloride. In contrast, the corresponding reaction systems involving iridium gave very complex mixtures Involving both iridium containing species and organic products. One of the iridium products, [pyH][lr(1-nqo)C13 pyl, has been isolated in the pure state and characterised by X-ray crystallography. The complexes Ir(1-nqo)3 and lr(2-nqo)3 were also isolated but in low yields. All trichelates ware shown to be diagmagnetic. None reacted with either pyridine or triphenylphosphine. These observations have been rationalised in terms of crystal field stabilisation energy. The behaviour of the rhodium and iridium complexes towards the Lewis bases contrasts that of analogous iron and cobalt complexes. The X-ray study of [pyH][lr(l-nqo)C13 py] has shown that the ligand is chelated to the metal as been observed in first transition series metal complexes derived from such ligands. The use of 1,2-naphthoqulnone 1-oxime as a potential ligand for separating rhodium from iridium has been investigated. Optimum conditions for recovery of rhodium was established, as a technique for refining rhodium current process at Inco (Europe) Ltd. The synthesis of cobalt, rhodium, copper, iron and nickel complexes of 1 ,2-naphthoquinone l-oxime-3,6- disulphonic acid (nRsH3) has been investigated and the complexes were isolated in solid form by developing a separation technique. Cobalt(III) and rhodium(III) salts reacted with the ligand to give metal complexes of type M(nRs Na)3 . The behaviour of the 1,2-naphthoquinone 1- oxime-3,6-disulphonic acid towards iron(ll) and iron(lll) or copper salts was shown to be more complex and interesting than previously reported. Both iron(II) and iron(III) chloride gave an Iron(II) product of the type Fe(nRs Na) whilst Iron(II) ammonium sulphate gave an Fe(II) product of the type Fe(nRs Na)2. The nickel salts gave a complex containing two ligands per metal, Ni(nRsHNa)2. The complexes of Iron(II) and copper(Il) of 1 ,2-naphthoquinone l-oxime-3,6-disulphonic acid catalysed aerobic oxidation of catechols. The oxidation involved oxidative cleavage of the aromatic ring of catechol by molecular oxygen to give muconic acid anhydride and 2H-pyran-2-one in addition to benzoquinone. This behaviour is very similar to enzyme catalysed oxygenation.
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Stoten, William C. "1,2-naphthoquinone mono-oximato complexes of ruthenium." Thesis, London Metropolitan University, 1988. http://repository.londonmet.ac.uk/3429/.

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The ruthenium(II) complexes Ru(nqo)2 (nqoH = 1,2-naphthoqulnona 1-oxima, or 2-oxima) were prepared by the interaction of the sodium salts of the 112-naphthoquinone mono-oximes with hydrated ruthenium(III) chloride in aqueous tetrahydrofuran.
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Fisher, Kimberly D. "Thermal rearrangement of 4-aryl-4-hydroxy-2-cyclobuten-1-ones and application of the methodology in the formation of benzofuronaphthoquinones and benzocarbazolequinones." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5872.

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Thesis (Ph. D.)--West Virginia University, 2008.
Title from document title page. Document formatted into pages; contains xvi, 200 p. : ill. Includes abstract. Includes bibliographical references (p. 95-97).
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De, Koning Charles Bernard. "The syntheses of some naturally derived naphthoquinones." Doctoral thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/22000.

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Bibliography: pages 193-195.
The synthesis of the naphthalene core of the ansamycin antibiotics, 8-acetyl-3-acetylamino-5,7-dihydroxy-1,4-naphthoquinone from benzoquinone by means of simple reactions including, Diels-Alder adduct formation, mild acetylation, oxime formation and Beckmann rearrangement in five steps with an overall yield of 22% is described in Chapter 1. The synthesis of the naturally occurring naphthoquinone derivative, possessing anti tumour and antiprotozoal properties, bikaverin is described in Chapter 2. Starting from vanillin the key intermediate 2-(2'-benzyloxy-6'-methyl-4'-methoxybenzoyl)-1,4,5,6,8-pentamethoxynaphthalene was prepared in six simple steps in an overall yield of 18%. This key intermediate was converted into bikaverin utilizing two independent routes. In the first route the benzyl group was removed from the key intermediate by hydrogenolysis followed by oxidative spiro ring formation , with 2,3-dichloro-5,6-dicyanobenzoquinone. After effecting xanthone ring formation and removal of two methyl groups with lithium iodide, bikaverin was produced in six steps in an overall yield of 32%. In the second route the key intermediate was first oxidised by silver (II) oxide this was followed by removal of the benzyl group and two methyl groups peri- to the quinone with boron trichloride, which led to spontaneous spiro ring formation, ultimately bikaverin was produced in three steps in an overall of 34%. The syntheses of the naturally occurring product ventiloquinone E and its trans-isomer as well as an isomer of the naturally occurring ventiloquinone J and its trans-isomer are described in Chapter 3. Starting from 1,2,4,5,8-pentamethoxynaphthalene, the synthesis of which has been described in Chapter 2, ventiloquinone E was prepared in nine steps in an overall yield of 7%. Similarly an isomer of ventiloquinone J was also prepared from 1,2,4,5,8-pentamethoxynaphthalene in ten steps in an overall yield of 6%. In both cases a mixture of cis-and trans-isomers was obtained, a successful resolution of both mixtures was accomplished by thin layer chromatography. By two other methods the trans-isomer of ventiloquinone E could be prepared in either nine steps in an overall yield of 23% or in six steps with an overall yield of 30% starting from the same pentamethoxynaphthalene.
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Song, Ronghui. "Synthesis, Characterization and Antimicrobial Properties of Novel Naphthoquinone Derivatives." Kent State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=kent1586783242508385.

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Bapela, Mahwahwatse Johanna. "Variation of active constituents in Euclea natalensis based on seedling stages, seasons, and fertilizers." Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-06262008-095522/.

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Brenstrum, Timothy James. "Studies towards the synthesis of medermycin." Phd thesis, Department of Organic Chemistry, 1999. http://hdl.handle.net/2123/8846.

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Yatchang, Marina Fosso. "Synthesis and Biological Activity of Aminoglycosides and 1,4-Naphthoquinone Derivatives." DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1371.

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The research described in this dissertation is at the interface of organic chemistry and biology, and it aimed at designing and synthesizing biologically active molecules for the possible development of therapeutic agents. Spinal muscular atrophy is an incurable disease that affects 1 in every 6000 babies, making it the leading genetic cause of infant mortality. While no treatment is available, efforts are being taken to solve this issue. Part of the work outlined in this dissertation was carried out in collaboration with researchers from the University of Missouri to investigate a potential therapeutic for this disease. In addition, the continuous outbreak of diseases caused by bacteria demands for new and improved antibiotics that could help eradicate those pathogens. My research thus allowed me to discover molecules with interesting activity against bacteria for the possible development of potential antibacterial agents. Finally, my research also allowed me to develop potential agro fungicides, which are still very much needed nowadays. Many crop diseases are due to fungal infections,which globally cause enormous economic losses. The use of fungicides is still the main strategy to control these diseases. However, current agro fungicides show some limitations. This is illustrated with Fusarium head blight (FHB), a destructive and costly disease of wheat, barley and other small grains, whose economic losses in the Central United States alone were estimated to $2.7 billion.
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Mahmood, Tariq. "Aspects of the chemistry of 1,4-naphthoquinones : an investigation of nucleophilic substitution reactions of alkylamines and hydroxyalyklamines on 1,4 napthoquinones and the role of solvent on the position of substitution." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5746.

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Nucleophilic substitution reactions of alkylamines, cyclic alkylamines, and hydroxyalkylamines with 5-substituted-1,4-naphthoquinones have been studied. It has been found that the nature of the solvent employed in the reaction influences the position of mono-substitution at either the 2- or 3-position. Although both regioisomers were produced in all the reactions, protic polar solvents favoured the formation of the 3-regioisomer, whereas non-protic solvents favoured the formation of the 2-regioisomer. It has also been found that formation of 2,3-diaminoalkyl derivatives is normally unlikely. A series of hydroxyalkylamino-1,4-naphthoquinones were also synthesised. The collision-induced dissociation mass spectra of protonated hydroxyalkylamino-1,4- naphthoquinones showed fragmentation patterns which were dependent on the nature and length of the side chain and the presence and nature of the adjacent group on the 3-position on the 1,4-naphthoquinone ring. A total of 27 novel compounds were synthesised during the course of this research, the structures of which were confirmed via 1D and 2D NMR spectroscopy, mass spectrometry (ESI), IR spectroscopy and high resolution mass spectrometry (HRESIMS and HREIMS).
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Books on the topic "Naphthoquinone"

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Perry, Philip J. Synthesis and biological evaluation of novel cytotoxic heterocyclic compounds: Furo (2,3-b) naphthoquinones and 2-aryl-4H-3,1-benzoxazin-4-ones. Leicester: De Montfort University, 1996.

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Stoten, William C. 1,2-naphthoquinone mono-oximato complexes of ruthenium. 1988.

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Musa, Yusuf. Studies of 1,2-naphthoquinone mono-oximato complexes. 1991.

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1,4-Naphthochinon. Stuttgart: S. Hirzel, 1999.

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Spektry pogloshchenii͡a︡ proizvodnykh 1,2 i 1,4--naftokhinonov v infrakrasnoĭ, ulʹtrafioletovoĭ i vidimoĭ oblasti͡a︡kh. Novosibirsk: Novosibirskiĭ institut organicheskoĭ khimii SO AN SSSR, 1985.

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Edited by: H. J. Arpe. Antidiabetic Drugs to Benzoquinone and Naphthoquinone Dyes, Volume A3, Ullmann's Encyclopedia of Industrial Chemistry. 5th ed. Wiley-VCH, 1985.

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Ullman's Encyclopedia of Industrial Chemistry. Vol A3 Antidiabetic drugs to benzoquinone and naphthoquinone dyes. 5th ed. Deerfield Beach: VCH, 1985.

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Fernando De Carvalho Da Silva, David Rodrigues Da Rocha, Luana Da Silva Magalhães Forezi, Mariana Filomena Do Carmo Cardoso, and Vitor Francisco Ferreira. Synthesis and Anticancer Activity of Low Molecular Weight Naphthoquinones. Elsevier Science & Technology Books, 2019.

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Legendre, Laurent, and Douglas W. Darnowski. Biotechnology with carnivorous plants. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198779841.003.0020.

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Several carnivorous plant families have been a source of medicine for centuries in many parts of the world. Research into their active ingredients have revealed that they include naphthoquinones, flavonoids, phenolic acid derivatives, goodyerosides, iridoids, and phenylpropanoids. Many aspects of their industrial production have been optimized, including plant elicitation, plant genetic modification, and plant in vitro culture to limit the collect of wild material. The currently most active biotechnological developments are related directly to their carnivorous nature. These include the heterologous production of therapeutic polypeptides by carnivorous plant secretory glands; and the creation of bio-inspired engineered products based on the snap-buckling mechanism of trap closure of the Venus’ fly trap, the internal nano-structures of the Drosera mucilage, and the physical properties of the slippery zone of the Nepenthes pitcher with applications in the textile, automobile, aeronautics, architecture, and medical industries.
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Book chapters on the topic "Naphthoquinone"

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Cui, Jia-hua, and Shao-shun Li. "Naphthoquinone Constituents of Anticancer Terrestrial Plants." In Plants That Fight Cancer, 85–105. Second edition. | Boca Raton, Florida : CRC Press, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/9780429056925-4.

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Winkelmann, Jochen. "Diffusion coefficient of 2-methyl-1,4-naphthoquinone in cyclohexane." In Diffusion in Gases, Liquids and Electrolytes, 967. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-540-73735-3_743.

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Winkelmann, Jochen. "Diffusion coefficient of 2-methyl-1,4-naphthoquinone in hexane." In Diffusion in Gases, Liquids and Electrolytes, 968. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-540-73735-3_744.

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Winkelmann, Jochen. "Diffusion coefficient of 2-methyl-1,4-naphthoquinone in dodecane." In Diffusion in Gases, Liquids and Electrolytes, 969. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-540-73735-3_745.

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Winkelmann, J. "Diffusion of 2-methyl-1,4-naphthoquinone (1); carbon dioxide (2)." In Gases in Gases, Liquids and their Mixtures, 1734. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-49718-9_1313.

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Winkelmann, Jochen. "Diffusion coefficient of 2-methyl-3-phytyl-1,4-naphthoquinone in hexane." In Diffusion in Gases, Liquids and Electrolytes, 1251. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-540-73735-3_1027.

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Linares, Marcela, Maria De Bertorello, and Marcela Longhi. "Solubility of a Isoxazolyl-Naphthoquinone by Complexation with Hydroxypropyl-ß-Cyclodextrin." In Proceedings of the Ninth International Symposium on Cyclodextrins, 207–10. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4681-4_48.

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Winkelmann, J. "Diffusion of 2-methyl-3-phytyl-1,4-naphthoquinone (1); carbon dioxide (2)." In Gases in Gases, Liquids and their Mixtures, 1796. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-49718-9_1361.

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Winkelmann, J. "Diffusion of 2-methyl-1,4-naphthoquinone (1); carbon dioxide (2); hexane (3)." In Gases in Gases, Liquids and their Mixtures, 2208–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-49718-9_1711.

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Milton, Ross D. "FAD-Dependent Glucose Dehydrogenase Immobilization and Mediation Within a Naphthoquinone Redox Polymer." In Enzyme Stabilization and Immobilization, 193–202. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-6499-4_15.

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Conference papers on the topic "Naphthoquinone"

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Aramaki, Shinji, Yuko Okamoto, Tetsuo Murayama, and Yuji Kubo. "Novel naphthoquinone methide dyes for poled polymers." In SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, edited by Gustaaf R. Moehlmann. SPIE, 1994. http://dx.doi.org/10.1117/12.187501.

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Oliveira, Alex Antonio de, and Carlos Kleber Z. Andrade. "Synthesis of naphthoquinone derivatives with potential pharmacological activity." In 14th Brazilian Meeting on Organic Synthesis. São Paulo: Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-14bmos-r0323-2.

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Poliuzhyn, Ihor, Oksana Smirnova, and Yosyp Yatchyshyn. "Thin Layer Chromatography for Some Derivatives of 1,4-Naphthoquinone." In International Youth Science Forum “Litteris et Artibus”. Lviv Polytechnic National University, 2018. http://dx.doi.org/10.23939/lea2018.01.162.

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Koshiba, Mitsunobu, Makoto Murata, Mariko Matsui, and Yoshiyuki Harita. "Thermally Induced And Base Catalyzed Reactions Of Naphthoquinone Diazides." In 1988 Microlithography Conferences, edited by Scott A. MacDonald. SPIE, 1988. http://dx.doi.org/10.1117/12.968337.

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SILVA, Andrei Marcelino Sá Pires, Edna Aparecida Faria de ALMEIDA, and Jorge Fernando Silva de MENEZES. "EXTRACTION, PURIFICATION, AND COMBINATION OF LAPACHOL IN NOVEL EUROPIUM COMPLEX." In SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE. DR. D. SCIENTIFIC CONSULTING, 2022. http://dx.doi.org/10.48141/sbjchem.21scon.38_abstract_silva.pdf.

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Lapachol belongs to the group of 1,4-naphthoquinones, with the addition of a hydroxide group attached to carbon 2 and a branched alkene nomenclature 3-methyl-2-butenyl attached to carbon 3, with final nomenclature 2-hydroxy-3 -(3-methyl-2-butenyl)-1,4-naphthoquinone. As a chromophore, it exhibits near-ultraviolet absorption, one of the important characteristics in the process of choosing ligands to integrate photoluminescent lanthanide complexes. Photoluminescent materials are currently widely used in the market for making plates, paints, plates, tapes, pigments, and other luminescent equipment. The use of what are called DMCLs (Molecular Light Converting Devices) is increasing in Photovoltaic Cells, Optical Luminescent Tracers, Forensic Chemistry, Fluoroimmunoassays, and more. Knowing the great demand for these devices, it is feasible to study and characterize new compounds that have favorable emission characteristics and that allow their use in the aforementioned categories. For this, the use of lanthanides is a great proposal, and the application of a chromophore ligand, such as Lapachol, aims to provide an increase in the emission of the final product. In the present work, the extraction, a new purification process of Lapachol from its natural source, the Ipê Roxo wood, is reported, as well as the characterizations that attest to the feasibility of the new process, in addition to the use of the material as a binder in lanthanide complexes.
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Diogo, Emilay B. T., a. Gleiston G. Dias, Wagner O. Valença, Celso A. Camara, Mauro G. da Silva, Ronaldo N. de Oliveira, Rubem F. S. Menna-Barreto, Solange L. de Castro, and Eufrânio N. da Silva Júnior. "Synthesis and evaluation against Trypanosoma cruzi of naphthoquinone-containing triazoles." In 15th Brazilian Meeting on Organic Synthesis. São Paulo: Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-15bmos-bmos2013_20139517918.

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"Computer prediction of biological activity of 1,2,4-triazole derivatives of 1,4-naphthoquinone." In Chemical technology and engineering. Lviv Polytechnic National University, 2021. http://dx.doi.org/10.23939/cte2021.01.032.

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Dias, Flaviana Rodrigues Fintelman, Vitor Francisco Ferreira, Vinícius Rangel Campos, Raquel C. Montenegro, Maria Cecília B. V. de Souza, and Anna Claudia Cunha. "Synthesis of a new class of 2-bromo-3-amino-1,4- naphthoquinone glycoconjugates." In 15th Brazilian Meeting on Organic Synthesis. São Paulo: Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-15bmos-bmos2013_2013821131741.

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Hussein, YasserH A., Velautham Sivakumar, Marwa Elazazy, and Karuppasamy Ganesh. "Synephrine as Antioxidant: Application in Quenching of Photo Induced Radical of Anthraquinone and Naphthoquinone." In Qatar Foundation Annual Research Conference Proceedings. Hamad bin Khalifa University Press (HBKU Press), 2016. http://dx.doi.org/10.5339/qfarc.2016.hbpp2032.

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Cahyana, A. H., L. Alfiandri, and B. Ardiansah. "Synthesis of new spiro-naphthoquinone prepared from lawsone compound and test of antioxidant activity." In PROCEEDINGS OF THE 5TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0007882.

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