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Relevant bibliographies by topics / 2,3-dichloro-1,4-naphthoquinone

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Academic literature on the topic '2,3-dichloro-1,4-naphthoquinone'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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Journal articles on the topic "2,3-dichloro-1,4-naphthoquinone"

1

Shestak, Olga P., Nadezhda N. Balaneva, and Vyacheslav L. Novikov. "Preparative Synthesis of Spinochrome D, a Pigment of Different Sea Urchin Species." Natural Product Communications 11, no. 9 (2016): 1934578X1601100. http://dx.doi.org/10.1177/1934578x1601100931.

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A simple and effective synthesis of spinochrome D (1) (2,3,5,6,8-pentahydroxy-1,4-naphthoquinone), a pigment of different sea urchin species, has been developed starting from 2,3-dichloro-5,8-dihydroxy-1,4-naphthoquinone (13), easily available by cycloacylation of 1,4-dimethoxybenzene (11) with dichloromaleic anhydride (12). Bromination of 13 with either bromine or dioxane dibromide to 6-bromo-2,3-dichloro-5,8-dihydroxy-1,4-naphthoquinone (21), followed by nucleophilic substitution of the halogen atoms by methoxy groups in 21 and hydrolysis of trimethyl ether 10 produce the target compound in

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2

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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3

Ukaegbu, Maraizu, Ray J. Butcher, N. M. Enwerem, Oladapo Bakare, and Charles Hosten. "2,3-Dichloro-5,8-dimethoxy-1,4-naphthoquinone." Acta Crystallographica Section E Structure Reports Online 68, no. 7 (2012): o2018. http://dx.doi.org/10.1107/s1600536812023926.

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4

Aly, Ashraf A. "Base Catalyzed Synthesis of Novel Fused-Imidazoles from N-Vinyl-1H-imidazole." Zeitschrift für Naturforschung B 60, no. 1 (2005): 106–12. http://dx.doi.org/10.1515/znb-2005-0116.

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Syntheses of various classes of fused-imidazoles are reported. The key to their successful synthesis depends on the reaction of N-vinyl-1H-imidazole with the π-deficient compounds under basic conditions. Reaction of the target imidazole with 1,1,2,2-tetracyanoethylene and dimethyl acetylenedicarboxylate afforded pyrrolo[1,2-a]imidazoles. On the other site, reaction of the target imidazole with 2-dicyanomethyleneindane-1,3-dione, 2,3-dicyano-1,4-naphthoquinone gave indanylimidazolo- [1,2-a]azepine and imidazolo[2,1-a]phenanthridine derivatives, respectively. Under basic reaction condition, vari

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5

Polonik, Nikita S., Viktor Ph Anufriev, and Sergey G. Polonik. "Short and Regiospecific Synthesis of Echinamine A – the Pigment of Sea Urchin Scaphechinus mirabilis." Natural Product Communications 6, no. 2 (2011): 1934578X1100600. http://dx.doi.org/10.1177/1934578x1100600215.

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New convenient two-step synthesis of natural pigment echinamine A by the condensation of 2,3-dichloro-6-ethyl-7-hydroxy-1,4-naphthoquinone with sodium nitrite and subsequent reduction of intermediate 7-ethyl-2,5,6,8-tetrahydroxy-3-nitro-1,4-naphthoquinone has been developed.

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6

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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7

Sarhan, Abd El-Wareth A. O., Adel M. Kamal El-Dean, and Maisa I. Abdel-Monem. "Chemoselective Reactions of 2,3-Dichloro-1,4-naphthoquinone." Monatshefte für Chemie / Chemical Monthly 129, no. 2 (1998): 205–12. http://dx.doi.org/10.1007/pl00010156.

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8

Ibis, Cemil, Hassen Shntaif, Hakan Bahar, and Sahinler Ayla. "An investigation of nucleophilic substitution reactions of 2,3-dichloro-1,4-naphthoquinone with various nucleophilic reagents." Journal of the Serbian Chemical Society 80, no. 6 (2015): 731–38. http://dx.doi.org/10.2298/jsc141124021i.

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Novel N- , N,S- and N,O- substituted naphthoquinone compounds were prepared by the reactions of 2,3-dichloro-1,4-naphthoquinone (1) and the corresponding nucleophiles in the presence of chloroform and triethylamine or ethanol solution of Na2CO3. The structures of the novel naphthoquinone compounds were characterized by micro analysis, FT-IR, 1H NMR, 13C NMR, MS and cyclic voltammetry.

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9

Shestak, Olga P., Victor Ph Anufriev, and Vyacheslav L. Novikov. "Preparative Production of Spinochrome E, a Pigment of Different Sea Urchin Species." Natural Product Communications 9, no. 7 (2014): 1934578X1400900. http://dx.doi.org/10.1177/1934578x1400900718.

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A concise route to spinochrome E (1) (2,3,5,6,7,8-hexahydroxy-1,4-naphthoquinone), a pigment isolated from sea urchins of different species, has been developed starting from either commercially available 5,8-dihydroxy-1,4-naphthoquinone (11) or 2,3-dichloro-5,8-dihydroxy-1,4-naphthoquinone (12). The protocol involves 3 steps, the chlorination of either 11 or 12 to tetrachloronaphthazarin (13), the total nucleophilic substitution of the chlorine atoms in 13 by methoxy groups, and hydrolysis of tetramethyl ether14; this makes possible the preparation of the target compound in overall yields from

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10

Shishkina, R. P., V. I. Mamatyuk, and E. P. Fokin. "Sulfonation and chlorosulfonation of 2,3-dichloro-1,4-naphthoquinone." Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 34, no. 4 (1985): 775–78. http://dx.doi.org/10.1007/bf00948057.

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Conference papers on the topic "2,3-dichloro-1,4-naphthoquinone"

1

Robinson, Anastasia G. J., Ridge Wells, Samantha J. Wilkinson, and Robert L. Copeland. "Abstract B030: Comparative analysis of cell viability of two triple-negative breast cancer cell lines using 2,3-dichloro-5,8-dimethoxy-1,4-naphthoquinone and 4 hydroxy-tamoxifen." In Abstracts: Eleventh AACR Conference on The Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; November 2-5, 2018; New Orleans, LA. American Association for Cancer Research, 2020. http://dx.doi.org/10.1158/1538-7755.disp18-b030.

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