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Journal articles on the topic '1, 4-naphthoquinone'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Ma, Qinge, Rongrui Wei, and Zhipei Sang. "Structural Characterization and Hepatoprotective Activity of Naphthoquinone From Cucumis bisexualis." Natural Product Communications 15, no. 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 exh

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2

Lynch, Daniel E., Ian McClenaghan, and Simon J. Coles. "2-Chloro-3-[4-(ethoxycarbonyl)-1-piperidyl]-1,4-naphthoquinone." Acta Crystallographica Section E Structure Reports Online 57, no. 2 (2001): o125—o126. http://dx.doi.org/10.1107/s1600536801000708.

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3

Gornostaev, Leonid M. "Synthesis of 5-hydroxy-10-R-benzo[a]phenazine-12-oxides by cyclization of 2-arylamino-1,4-naphthoquinone-1-oximes under the action of nitrating mixture." Butlerov Communications 61, no. 2 (2020): 12–23. http://dx.doi.org/10.37952/roi-jbc-01/20-61-2-12.

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The synthesis of рolycyclic quinoid compounds, which exhibit a wide range of biological activity is one of the most promising and actively developing areas of the fine organic synthesis. Heterocyclic compounds including those that can be donors of nitrogen oxide NO occupy a special place among biologically active structures. These substances include a number of N-oxides, e.g., 1,2-diazet-1,2-dioxides, furoxanes and their benzo analogs, and N,N′-pyrazole dioxides. The reason for the high biological activity of N-oxides of nitrogenous heterocycles, which cannot easily generate nitrogen oxide NO

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4

Coulidiati, Tangbadioa H., Bruna B. Dantas, Glaucia V. Faheina-Martins, Enéas Ricardo de Morais Gomes, Juan C. R. Gonçalves, and Demetrius A. Machado de Araújo. "Proapoptotic Effects of triazol-1,4-Naphthoquinones Involve Intracellular ROS Production and MAPK/ERK Pathway in Human Leukemia Cells." Anti-Cancer Agents in Medicinal Chemistry 20, no. 17 (2020): 2089–98. http://dx.doi.org/10.2174/1871520620666200721124221.

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Background : The natural products constitute an important source of antitumor and cytotoxic agents. Naphthoquinones are effectively quinones present in different plants, with demonstrated anticancer activities. A recent study conducted by our group demonstrated the antileukemic potential of two novel triazol-1,4- naphthoquinones derivatives, PTN (2-(4-Phenyl-1H-1,2,3-triazol-1-yl)-1,4-naphthoquinone) and MPTN (2-[4- (4-Methoxyphenyl)-1H-1,2,3-triazol-1-yl]-1,4-naphthoquinone). Although, the mechanisms underlying the proapoptotic effects of PTN and MPTN have not been fully elucidated so far. Ob

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5

WURM, G., and H. J. DUCHSTEIN. "ChemInform Abstract: 1,4-Naphthoquinones. Part 24. On the Dehalogenation of 2-/3-Halogen-1, 4-naphthoquinone Derivatives." ChemInform 26, no. 28 (2010): no. http://dx.doi.org/10.1002/chin.199528064.

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6

Lukeman, Matthew, Duane Veale, Peter Wan, V. Ranjit N. Munasinghe, and John ET Corrie. "Photogeneration of 1,5-naphthoquinone methides via excited-state (formal) intramolecular proton transfer (ESIPT) and photodehydration of 1-naphthol derivatives in aqueous solution." Canadian Journal of Chemistry 82, no. 2 (2004): 240–53. http://dx.doi.org/10.1139/v03-184.

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The photochemistry of naphthols 1, 2, 4, 5 and 9, and phenol 10 has been studied in aqueous solution with the primary aim of exploring the viability of such compounds for naphthoquinone and quinone methide photogeneration, along the lines already demonstrated by our group for phenol derivatives. 1-Naphthol (1) is known to be substantially more acidic than 2-naphthol (2) in the singlet excited state (pKa* = 0.4 and 2.8, respectively) and it was expected that this difference in excited-state acidity might be manifested in higher reactivity of 1-naphthol derivatives for photochemical reactions re

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7

Chaudhary, Ankita, and Jitender M. Khurana. "2-Hydroxy-1, 4-Naphthoquinone: A Versatile Synthon in Organic Synthesis." Current Organic Chemistry 20, no. 12 (2016): 1314–44. http://dx.doi.org/10.2174/1385272820666151125231522.

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8

Gupta, Deepti Bahl, and M. L. Gulrajani. "Kinetic and thermodynamic studies on 2-hydroxy-1, 4-naphthoquinone (lawsone)." Journal of the Society of Dyers and Colourists 110, no. 3 (2008): 112–15. http://dx.doi.org/10.1111/j.1478-4408.1994.tb01621.x.

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9

Jassbi, Amir R., Pahup Singh, Jyoti Lamba, Sonakshi Jain, Ian T. Baldwin, and Satoshi Tahara. "Transformation of Lapachol to a Novel Naphthoquinone and Related Compounds." Zeitschrift für Naturforschung B 61, no. 1 (2006): 73–77. http://dx.doi.org/10.1515/znb-2006-0115.

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In boiling pyridine, lapachol (1) is transformed into novel asymmetric naphthoquinone derivative, quadrilone (2), and into dehydro-α-lapachone (3), and adenophyllone (4). Lapachol used in the present study was isolated from the heartwood of Heterophragma quadriloculare and found to be the most abundant naphthoquinone.

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10

Цеплина, С. Н., та E. E. Цеплин. "Н-комплексы 1,2-нафтохинона с молекулами воды в водном растворе и их влияние на сдвиги полос поглощения". Оптика и спектроскопия 129, № 5 (2021): 599. http://dx.doi.org/10.21883/os.2021.05.50884.40-20.

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Optical absorption spectra of 1,2-naphthoquinone in non-polar (n-hexane) and polar (water) solvents were obtained. It is shown that the use of quantum chemical calculations based on time-dependent density functional theory (TDDFT B3LYP/6-311+G(d, p)) with the polarizable continuum model (PCM) for calculating 1,2-naphthoquinone in a solution of n-hexane and hydrogen complex of 1,2-naphthoquinone with two water molecules in an aqueous medium describes well the shifts of the absorption bands of 1,2-naphthoquinone in a water solution compared to a solution in n-hexane. Based on the analysis of dev

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11

Suganuma, Hiroyuki. "Development of Production Process of a New Pesticide from 1, 4-Naphthoquinone." Journal of Synthetic Organic Chemistry, Japan 59, no. 1 (2001): 23–32. http://dx.doi.org/10.5059/yukigoseikyokaishi.59.23.

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12

Sharma, Venu. "Diospyros montana Roxb.: A source of 1, 4-naphthoquinone dimers counting diospyrin esters." IOSR Journal of Applied Chemistry 10, no. 01 (2017): 25–26. http://dx.doi.org/10.9790/5736-1001012526.

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13

Sharma, Venu. "Diospyros montana Roxb.: A source of 1, 4-naphthoquinone dimers counting diospyrin esters." IOSR Journal of Computer Engineering 10, no. 01 (2017): 25–26. http://dx.doi.org/10.9790/0661-1001012526.

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14

Lamoureux, Guy, Mónica Alvarado-Rojas, and Leslie W. Pineda. "Crystal structure of 4-[(adamantan-1-yl)amino]naphthalene-1,2-dione." Acta Crystallographica Section E Crystallographic Communications 75, no. 1 (2019): 99–102. http://dx.doi.org/10.1107/s2056989018017917.

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The title compound, C20H21NO2, an example of a stable 1,2-naphthoquinone, was determined by single-crystal X-ray diffraction analysis at 100 K. This structure illustrates steric buttressing of the adamantanyl group, forcing the N—H group into the coplanar aromatic C—H. The presence of strong delocalization between the planar N atom at the 4-position and the carbonyl group at the 2-position is indicated. In the crystal, C—H...O and C—H...π interactions link the molecules into a three-dimensional network.

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15

Yuk, Dong-Yeon, Chung-Kyu Ryu, Jin-Tae Hong, et al. "Antithrombotic and antiplatelet activities of 2-chloro-3-[4-(ethylcarboxy)-phenyl]-amino-1,4-naphthoquinone (NQ12), a newly synthesized 1,4-naphthoquinone derivative." Biochemical Pharmacology 60, no. 7 (2000): 1001–8. http://dx.doi.org/10.1016/s0006-2952(00)00411-1.

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16

Lamoureux, Guy, Mónica Alvarado-Rojas, and Leslie W. Pineda. "Crystal structure of (E)-2-(tert-butylamino)-4-(tert-butylimino)naphthalen-1(4H)-one." Acta Crystallographica Section E Crystallographic Communications 74, no. 7 (2018): 973–76. http://dx.doi.org/10.1107/s2056989018008514.

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The title compound, C18H24N2O, is the first example of a naphthoquinone imine derivative isolated in the 4-imine/2-amine tautomeric form having bulky alkyl substituents at the N atoms. The molecular conformation is stabilized by an intramolecular hydrogen bond between the amine and a carbonyl group and by London attraction between the two tert-butyl groups. Only van der Waals interactions were identified in the crystal packing.

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17

Huang, Huan-Ming, Yu-Jin Li, Yin-Ping Dai, Wu-Bin Yu, Qin Ye, and Jian-Rong Gao. "Bifunctionalisation of 1,4-naphthoquinone by the Oxidative Addition of an Alkylamine and Iodine." Journal of Chemical Research 37, no. 1 (2013): 34–37. http://dx.doi.org/10.3184/174751912x13547276507240.

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18

Aleem, Mohd. "Anti-Inflammatory and Anti-Microbial Potential of Plumbago zeylanica L.: A Review." Journal of Drug Delivery and Therapeutics 10, no. 5-s (2020): 229–35. http://dx.doi.org/10.22270/jddt.v10i5-s.4445.

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Plumbago zeylanica L. (Pz) is one of the most important medicinal plant belonging to the family Plumbaginaceae. It is a perennial shrub, growing throughout India and most places of Sri Lanka. It contains various bioactive compounds like alkaloids, flavonoids, naphthoquinones, glycoside, saponins, steroids, tri-terpenoids, coumarins, phenolic compounds etc. Of all the chemical constituents, plumbagin is the principal active compound. Plumbagin (5-hydroxy-2-methyl-1, 4-naphthoquinone-C11H8O3) is primarily present in roots in higher amounts with only about 1% in the whole plant. The literature re

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19

Vasileva, Elena A., Natalia P. Mishchenko, Pavel A. Zadorozhny, and Sergey A. Fedoreyev. "New Aminonaphthoquinone from the Sea Urchins Strongylocentrotus pallidus and Mesocentrotus nudus." Natural Product Communications 11, no. 6 (2016): 1934578X1601100. http://dx.doi.org/10.1177/1934578x1601100631.

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The aminonaphthoquinone, spinamine E (5), was isolated for the first time from the sea urchins Strongylocentrotus pallidus (Sars G.O., 1872) and Mesocentrotus nudus (A. Agassiz, 1864). The structure of 5 was elucidated as 2-amino-3,5,6,7,8-pentahydroxy-l,4-naphthoquinone using 1D 1H-, 13C- and 2D NMR procedures, and HR-ESI mass-spectrometric data of 5 and its trimethyl ether. Spinamine E, as well as two other aminonaphthoquinones of sea urchins, echinamines A (2) and B (3), along with their hydroxylated analogues, spinochrome E (4) and echinochrome A (1), were tested for their ability to scave

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20

FERNANDES, M. C., E. N. DA SILVA, A. V. PINTO, S. L. DE CASTRO, and R. F. S. MENNA-BARRETO. "A novel triazolic naphthofuranquinone induces autophagy in reservosomes and impairment of mitosis in Trypanosoma cruzi." Parasitology 139, no. 1 (2011): 26–36. http://dx.doi.org/10.1017/s0031182011001612.

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SUMMARYChagas' disease, caused by the protozoan Trypanosoma cruzi, represents a serious health problem in Latin America, and the available chemotherapy, which is based on 2 nitro-derivatives, is not satisfactory. In folk medicine, natural products including naphthoquinones have been employed for the treatment of different parasitic diseases. In the pursuit of alternative drugs for Chagas' disease, we investigated the mechanism of action of the triazolic naphthoquinone (TN; 2,2-dimethyl-3-(4-phenyl-1H-1,2,3-triazol-1-yl)-2,3-dihydronaphtho[1,2-b]furan-4,5-dione), which is the most active compou

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21

Hassan, Alaa, Nasr Mohamed, Kamal El-Shaieb, Hendawy Tawfeek, Stefan Bräse, and Martin Nieger. "Eschenmoser Coupling Reaction and Reactivity of Hydrazinecarbothioamides in the Synthesis of Benzindazole and Naphthothiazole Derivatives." Synthesis 49, no. 16 (2017): 3720–25. http://dx.doi.org/10.1055/s-0036-1588179.

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N-Unsubstituted and N-substituted 2-phenylhydrazinecarbothioamides react with 2,3-dichloro-1,4-naphthoquinone to give a series of unprecedented 3-amino- and 3-(alkylamino)-1-phenyl-1H-benzo[f]indazole-4,9-diones in good yields. On the other hand, the reaction of N-substituted 2-tosylhydrazinecarbothioamides with 2,3-dichloro-1,4-naphthoquinone afforded (Z)-N-[3-(tosylamino)-4,9-dioxo-4,9-dihydronaphtho[2,3-d]thiazol-2(3H)-ylidene]-substituted aminium chlorides and (Z)-N-[(2-substituted imino)-4,9-dioxo-4,9-dihydronaphtho[2,3-d]thiazol-3(2H)-yl]-4-toluenesulfonamide hydrates.

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22

KALLMAYER, H. J., and U. BOCK. "ChemInform Abstract: 4-N-Alkyl-arylamino-1,2-naphthoquinone-1/2-dinitrophenylhydrazones - Structure and Color." ChemInform 29, no. 40 (2010): no. http://dx.doi.org/10.1002/chin.199840200.

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23

Liao, Hai-Xia, Tai-Ming Shao, Rong-Qing Mei, et al. "Bioactive Secondary Metabolites from the Culture of the Mangrove-Derived Fungus Daldinia eschscholtzii HJ004." Marine Drugs 17, no. 12 (2019): 710. http://dx.doi.org/10.3390/md17120710.

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Two new polyketides, 8-O-methylnodulisporin F (1) and nodulisporin H (2), two new naphthoquinones, 5-hydroxy-2-methoxy-6,7-dimethyl-1,4-naphthoquinone (3) and 5-hydroxy-2-methoxynaphtho[9–c]furan-1,4-dione (4), and a new naphthofuran 1,3,8-trimethoxynaphtho[9–c]furan (5), along with five known compounds 4-O-methyl eleutherol (6), 2-acetyl-7-methoxybenzofuran (7), (-)-orthosporin (8), diaporthin (9), and 6-hydroxymellein (10), were obtained from the EtOAc extract of the mangrove-derived fungus Daldinia eschscholtzii HJ004. The structures of the isolated compounds were elucidated by extensive NM

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24

Fan, Wei-Qiang, Jin Wang, Jinlong Jiang, and Yong-Min Zhang. "Some Novel Quinone-Type Compounds Containing Arylseleno Groups Derived from Tetrachloro-1, 4-Benzoquinone and 2, 3-Dichloro-1, 4-Naphthoquinone." Synthetic Communications 22, no. 21 (1992): 3061–66. http://dx.doi.org/10.1080/00397919209409254.

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25

Amano, Takuo, Hisashi Miyagawa, Tamio Ueno, and Nobuo Hamada. "Production of 5,7-Dihydroxy-6-hydroxymethyl-2-methoxy-1,4-naphthoquinone by the Cultured Lichen Mycobiont of Opegrapha sp. No. 9771836." Zeitschrift für Naturforschung B 55, no. 7 (2000): 667–70. http://dx.doi.org/10.1515/znb-2000-0715.

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Abstract A new pigment was isolated from an osmotically-stressed culture of the lichen mycobiont of Opegrapha sp. and the structure was determined to be 5, 7-dihydroxy-6-hydroxymethyl-2-methoxy-1, 4-naphthoquinone by spectroscopic analyses.

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26

Liu, Hongju, Chong Yan, Changqun Li, Tingting You, and Zhigang She. "Naphthoquinone Derivatives with Anti-Inflammatory Activity from Mangrove-Derived Endophytic Fungus Talaromyces sp. SK-S009." Molecules 25, no. 3 (2020): 576. http://dx.doi.org/10.3390/molecules25030576.

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Twelve 1, 4-naphthoquinone derivatives, including two new (1 and 2) and 10 known (3–12), were obtained from endophytic fungus Talaromyces sp. SK-S009 isolated from the fruit of Kandelia obovata. All structures were identified through extensive analysis of the nuclear magnetic resonance (NMR), mass spectrometry (MS) and circular dichroism (CD), as well as by comparison with literature data. These compounds significantly inhibited the lipopolysaccharide (LPS)-induced nitric oxide (NO) production in the murine macrophage cell line (RAW 264.7 cells). The half maximal inhibitory concentration (IC50

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27

Verdan, Maria Helena, Hector H. F. Koolen, Marcos José Salvador, Andersson Barison, and Maria Elida A. Stefanello. "A New Naphthoquinone from Sinningia leucotricha (Gesneriaceae)." Natural Product Communications 10, no. 4 (2015): 1934578X1501000. http://dx.doi.org/10.1177/1934578x1501000423.

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A new naphthoquinone, 7,8-dimethoxydunnione (1), was isolated from Sinningia leucotricha (Hoehne) Moore tubers, together with four known compounds: 7-hydroxy-α-dunnione (2), 6-methoxy-7-hydroxy-α-dunnione (3), presilphiperfolan-9-ol (4), and betulinic acid (5). All compounds were identified by spectroscopic and mass spectrometric techniques and comparison with literature data. Compounds 2-5 are being reported for the first time in S. leucotricha.

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28

Kramer, Carsten S., and Stefan Bräse. "Thiourea-catalyzed Diels–Alder reaction of a naphthoquinone monoketal dienophile." Beilstein Journal of Organic Chemistry 9 (July 12, 2013): 1414–18. http://dx.doi.org/10.3762/bjoc.9.158.

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A variety of organocatalysts were screened for the catalysis of the naphthoquinone monoketal Diels–Alder reaction. In this study we found that Schreiner's thiourea catalyst 10 and Jacobson's thiourea catalyst 12 facilitate the cycloaddition of the sterically hindered naphthoquinone monoketal dienophile 3 with diene 4. The use of thiourea catalysis allowed for the first time the highly selective synthesis of the exo-product 2a in up to 63% yield. In this reaction a new quaternary center was built. The so formed cycloaddition product 2a represents the ABC tricycle of beticolin 0 (1) and is also

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29

THONGNOPNUA, PHENSRI, JUTIMA BOONLEANG, VILAI CHUNEJITBHONG, and WALLEE VANICHSENI. "QUANTITATIVE DETERMINATION OF 2-METHOXY-1, 4-NAPHTHOQUINONE IN PLASMA BY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY." Analytical Sciences 7, Supple (1991): 1529–34. http://dx.doi.org/10.2116/analsci.7.supple_1529.

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30

BOUAMMALI, B., F. PAUTET, and H. FILLION. "ChemInform Abstract: Regiochemistry in the Cycloaddition of Disilylated 2-Azadienes with 1, 4-Naphthoquinone Derivatives." ChemInform 23, no. 32 (2010): no. http://dx.doi.org/10.1002/chin.199232068.

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31

Gao, Yuhe, Jiafu Chen, Yang Pan, Xiujuan Zhuang, and Shuqin Yu. "Characterization of micelle: Magnetic field effects on photoexcited reactions of 2-methyl-1, 4-naphthoquinone." Colloids and Surfaces A: Physicochemical and Engineering Aspects 287, no. 1-3 (2006): 126–31. http://dx.doi.org/10.1016/j.colsurfa.2006.03.038.

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Feng, Zikai, Mohammed Sedeeq, Abraham Daniel, et al. "Comparative In Vitro Toxicology of Novel Cytoprotective Short-Chain Naphthoquinones." Pharmaceuticals 13, no. 8 (2020): 184. http://dx.doi.org/10.3390/ph13080184.

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Short-chain quinones (SCQs) have been identified as potential drug candidates against mitochondrial dysfunction, which largely depends on the reversible redox characteristics of the active quinone core. We recently identified 11 naphthoquinone derivatives, 1–11, from a library of SCQs that demonstrated enhanced cytoprotection and improved metabolic stability compared to the clinically used benzoquinone idebenone. Since the toxicity properties of our promising SCQs were unknown, this study developed multiplex methods and generated detailed toxicity profiles from 11 endpoint measurements using t

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33

El-Shaieb, Kamal M., Mohamed A. Ameen, Fathy F. Abdel-latif, and Asmaa H. Mohamed. "Facile Synthesis of Thiazole, Thiazine and Isoindole Derivatives via EDA Approach and Conventional Methods." Zeitschrift für Naturforschung B 68, no. 8 (2013): 905–12. http://dx.doi.org/10.5560/znb.2013-3117.

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The reactivity of N-amidinothiourea (1) as an electron donor towards several electron-accepting functional groups via electron-donor-acceptor (EDA) interaction has been studied. Thus on treatment of 1 with either 1,1,2,2-tetracyanoethylene (TCNE, 2), 2,3-dicyano-1,4-naphthoquinone (DCNQ, 4), 2,3,5,6-tetrabromo-1,4-benzoquinone (BHL-p, 6), 2,3-dichloro-1,4-naphthoquinone (DCHNQ, 8), 2,3,5,6-tetrachloro-1,4-benzoquinone (CHL-p, 13), 2,3-dicyano-5,6-dichloro-1,4- benzoquinone (DDQ, 15), 2-dicyanomethyleneindan-1,3-dione (CNIND, 17), 2-(2-oxoindolin-3- ylidene)malononitrile (19), and/or dimethyl a

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34

McWhinney, R. D., S. Zhou, and J. P. D. Abbatt. "Redox activity of naphthalene secondary organic aerosol." Atmospheric Chemistry and Physics Discussions 13, no. 4 (2013): 9107–49. http://dx.doi.org/10.5194/acpd-13-9107-2013.

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Abstract. Chamber secondary organic aerosol (SOA) from low-NOx photooxidation of naphthalene by hydroxyl radical was examined with respect to its redox cycling behaviour using the dithiothreitol (DTT) assay. Naphthalene SOA was highly redox active, consuming DTT at an average rate of 118 &amp;pm; 14 pmol per minute per μg of SOA material. Measured particle-phase masses of the major previously identified redox active products, 1,2- and 1,4-naphthoquinone, accounted for only 21 &amp;pm; 3% of the observed redox cycling activity. The redox-active 5-hydroxy-1,4-naphthoquinone was identifie

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35

Shinde, Dnyaneshwar, Popat Tambade, Habib Pathan, and Kisan Gadave. "Experimental and theoretical study of 1, 4-naphthoquinone based dye in dye-sensitized solar cells using ZnO photoanode." Materials Science-Poland 35, no. 4 (2018): 746–54. http://dx.doi.org/10.1515/msp-2017-0088.

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Abstract A dye-sensitized solar cell (DSSC) was assembled using a dye 4-(3-chloro-1, 4-dioxo-1, 4-dihydronaphthalen-2-ylamino) benzoic acid with ZnO as a photoanode. It was synthesized using 2, 3-dichloro 1, 4-naphthoquinone and p-amino benzoic acid. The spectral features of the dye were analyzed in ethanol using experimental and computational methods. The theoretical investigations revealed that the synthesized dye may act as a sensitizer in DSSCs. The photoelectrochemical performance was tested under direct sunlight using a sandwich type DSSC. The photovoltaic data of the dye adsorbed on ZnO

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36

Marcos, Alicia, Carmen Pedregal, and Carmen Avendaño. "Synthesis of 2- and 4-Oxo-1H-1-azaanthracene-9,10-diones from 2-amino-1,4-naphthoquinone." Tetrahedron 50, no. 45 (1994): 12941–52. http://dx.doi.org/10.1016/s0040-4020(01)81213-8.

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37

Shukla, Shubhanjali, Radhey Shyam Srivastava, Sushant Kumar Shrivastava, Ajit Sodhi, and Pankaj Kumar. "Synthesis, Molecular docking and Biological evaluation of 4-Cycloalkylidineamino 1, 2-Naphthoquinone Semicarbazones as Anticancer agents." Asian Pacific Journal of Tropical Biomedicine 2, no. 2 (2012): S1040—S1046. http://dx.doi.org/10.1016/s2221-1691(12)60358-x.

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38

Liu, Xiao-Xia, and Wing-Tak Wong. "Synthesis, characterisation and co-polymerisation of ruthenium 1,2-naphthoquinone-1-oxime complexes containing 4-vinylpyridine ligands." Inorganica Chimica Acta 312, no. 1-2 (2001): 231–38. http://dx.doi.org/10.1016/s0020-1693(00)00337-6.

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39

Clarke, David T., Gareth R. Jones, and Margaret M. Martin. "The anti-sickling drug lawsone (2-OH-1, 4-naphthoquinone) protects sickled cells against membrane damage." Biochemical and Biophysical Research Communications 139, no. 2 (1986): 780–86. http://dx.doi.org/10.1016/s0006-291x(86)80058-4.

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40

Cabeza, Adela Sevillano, P. Campíns Falcó, and Carmen Molins Legua. "Kinetic-Spectrophotometric Determination of Primary and Secondary Amines by Reaction with 1-2 Naphthoquinone-4-Sulphonate." Analytical Letters 27, no. 6 (1994): 1095–108. http://dx.doi.org/10.1080/00032719408000281.

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41

Abdulrahman, Sameer A. M., and Kanakapura Basavaiah. "Sensitive and selective spectrophotometric assay of gabapentin in capsules using sodium 1, 2-naphthoquinone-4-sulfonate." Drug Testing and Analysis 3, no. 10 (2011): 748–54. http://dx.doi.org/10.1002/dta.242.

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42

Deniz, N. Gulsah, and Cemil Ibis. "Synthesis and crystal structure of 2-(7-sulfanyl-4-methyl-coumarinyl)-3-(1-ethoxy)-1,4-naphthoquinone." Acta Crystallographica Section A Foundations of Crystallography 65, a1 (2009): s238. http://dx.doi.org/10.1107/s0108767309095075.

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43

Cordero, A. Punta, F. J. Barragán de la Rosa, and A. Guiraum. "Spectrophotometric determination of sulfanilic acid and sulfonamides in pharmaceutical samples with potassium 1,2-naphthoquinone-4-sulfonate." Canadian Journal of Chemistry 67, no. 10 (1989): 1599–605. http://dx.doi.org/10.1139/v89-244.

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An accurate and simple method is proposed for the determination of sulfanilic acid in the presence of sulfonamides. This method is based on measuring the intensity of the red colour that develops when sulfanilic acid is allowed to react with potassium 1,2-naphthoquinone-4-sulphonate (NS) in a chloroaceticchloroacetate buffer at pH 3,4. Colour development reaches completion after 2 h, allowing sulfanilic acid to be quantified spectrophotometrically at 470 nm (ε = 4.7 × 103 L mol−1 cm−1). The main product causing colour formation, potassium 1,2-naphthoquinone-4-(N-aminophenylen-4-sulphonate) (NS

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44

McWhinney, R. D., S. Zhou, and J. P. D. Abbatt. "Naphthalene SOA: redox activity and naphthoquinone gas–particle partitioning." Atmospheric Chemistry and Physics 13, no. 19 (2013): 9731–44. http://dx.doi.org/10.5194/acp-13-9731-2013.

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Abstract. Chamber secondary organic aerosol (SOA) from low-NOx photooxidation of naphthalene by hydroxyl radical was examined with respect to its redox cycling behaviour using the dithiothreitol (DTT) assay. Naphthalene SOA was highly redox-active, consuming DTT at an average rate of 118 ± 14 pmol per minute per μg of SOA material. Measured particle-phase masses of the major previously identified redox active products, 1,2- and 1,4-naphthoquinone, accounted for only 21 ± 3% of the observed redox cycling activity. The redox-active 5-hydroxy-1,4-naphthoquinone was identified as a new minor produ

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45

Greenland, H., JT Pinhey, and S. Sternhell. "Oxidation of 1-Naphthols by Lead Tetraacetate in Acetic Acid." Australian Journal of Chemistry 39, no. 12 (1986): 2067. http://dx.doi.org/10.1071/ch9862067.

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A detailed study of the lead tetraacetate-acetic acid oxidation of 1-naphthol , 4-acetoxy-1-naphthol, 2-methyl-1-naphthol, 2,3-dimethyl-1- naphthol and 1,2,3,4-tetrahydro-9-anthrol (17) has been carried out. In the case of 1-naphthol the major product was 4-acetoxy-1-naphthol (4), with 2,2-diacetoxynaphthalen-1(2H)-one (2) being the only other product formed in significant yield. Attack at C4 was again the main reaction with 4-acetoxy-1-naphthol, which gave 1,4-naphthoquinone as the major product. Acetoxylation occurred predominantly at C2 with 2-methyl-1-naphthol and 2,3-dimethyl-1-naphthol t

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Bisoli, Eder, Talita Vilalva Freire, Nídia Cristiane Yoshida, et al. "Cytotoxic Phenanthrene, Dihydrophenanthrene, and Dihydrostilbene Derivatives and Other Aromatic Compounds from Combretum laxum." Molecules 25, no. 14 (2020): 3154. http://dx.doi.org/10.3390/molecules25143154.

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The chemical investigation of the roots and stems of Combretum laxum yielded a new dihydrostilbene derivative, 4′-hydroxy-3,3′,4-trimethoxy-5-(3,4,5-trimethoxyphenoxy)-bibenzyl (1), two phenanthrenes (2–3), and three dihydrophenanthrenes (4–6), along with one lignan, three triterpenoids, one aurone, one flavone, one naphthoquinone, and two benzoic acid derivatives. Their structures were determined by 1D and 2D nuclear magnetic resonance (NMR) spectroscopic techniques and/or mass spectrometry data. The occurrence of dihydrostilbenoid, phenanthrene and dihydrophenanthrene derivatives is unpreced

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47

Cao, Shurui, Yaling Chen, Lei Zhang, et al. "Designed multifunctional ionic liquids–magnetic graphene nanocomposites as the adsorbent of MSPE for the determination of preservatives." Analytical Methods 10, no. 12 (2018): 1420–30. http://dx.doi.org/10.1039/c7ay02746j.

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A new structural design for fabricating four types of ionic liquids was successfully adapted, which was based on changing the anion of 1-vinyl-3-octylimidazolium bromide (VOIm<sup>+</sup>Br<sup>−</sup>) with benzene sulfonic acid (BenSO<sub>3</sub><sup>−</sup>), 2-naphthalene sulfonic acid (NapSO<sub>3</sub><sup>−</sup>), 1-anthraquinonesulfonic acid (AQSO<sub>3</sub><sup>−</sup>) and 1,2-naphthoquinone-4-sulfonic acid (NQSO<sub>3</sub><sup>−</sup>).

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Audu, Aramani A. "The synthesis of silica-immobilized 1,2-naphthoquinone thiosemicarbazone with 3-aminopropyltriethoxy silane and 4-nitrobenzoyl chloride." Reactive Polymers 10, no. 1 (1989): 3–9. http://dx.doi.org/10.1016/0923-1137(89)90003-1.

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Shukla, Shubhanjali, Radhey Shyam Srivastava, Sushant Kumar Shrivastava, Ajit Sodhi, and Pankaj Kumar. "Synthesis, cytotoxic evaluation, docking and in silico pharmacokinetic prediction of 4-arylideneamino/cycloalkylidineamino 1, 2-naphthoquinone thiosemicarbazones." Journal of Enzyme Inhibition and Medicinal Chemistry 28, no. 6 (2012): 1192–98. http://dx.doi.org/10.3109/14756366.2012.721783.

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Manikandan, P., S. Pushpam, V. Sasirekha, J. Suvetha Rani, and V. Ramakrishnan. "The quenching effect of silver nanoparticles on 2-amino-3-bromo-1, 4-naphthoquinone using fluorescence spectroscopy." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 121 (March 2014): 276–81. http://dx.doi.org/10.1016/j.saa.2013.10.079.

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