- Synthesis of 8-hydroxyquinolines by the cyclization of m-hydroxyphenethyl ketone O-2,4-dinitrophenyloximes
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8-Hydroxyquinolines are synthesized from O-2,4-dinitrophenyloximes of m-hydroxyphenethyl ketones by the treatment with sodium hydride, and then with 2,3-dichloro4,5-dicyano-p-benzoquinone (DDQ).
- Uchiyama, Katsuya,Hayashi, Yujiro,Narasaka, Koichi
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- Study on Relationship Between Fluorescence Properties and Structure of Substituted 8-Hydroxyquinoline Zinc Complexes
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Organic light-emitting diodes (OLEDs) produced from 8-hydroxyquinoline metal complexes play a vital role in modern electroluminescent devices. In this manuscript, a series of 8-hydroxyquinoline derivatives were synthesized by different methods and their corresponding zinc metal complexes were prepared. The UV and fluorescence properties of the complexes were measured aiming to understand the effect of substituents at the quinoline ring on the fluorescence properties of the complexes. When the C-5 of 8-hydroxyquinoline was replaced by halogen group, the fluorescence emission wavelengths had been red-shifted, at the same time, blue-shifted of fluorescence emission wavelength was observed when the C-5 position of 8-hydroxyquinoline was substituted by electron-withdrawing group. When the C-4 position of 8-hydroxyquinolie was substituted by methyl or the C-5 position was substituted by sulfonic acid group, the corresponding zinc complexes had higher fluorescence intensity than 8-hydroxyquinolie zinc.
- Jianbo, He,Tingting, Zhou,Yongjing, Cao,Yuanyuan, Zhang,Weiqing, Yang,Menglin, Ma
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p. 1121 - 1126
(2018/08/17)
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- ALUMINUM CHELATE COMPLEX FOR ORGANIC EL MATERIAL
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This invention provides an organic EL material useful for the emissive layer of an organic EL element which deteriorates little in luminance when operated over a prolonged period of time and shows excellent durability. The material is an aluminum chelate
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Page/Page column 18
(2010/10/19)
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- Design and synthesis of novel sulfonamide-containing bradykinin hB 2 receptor antagonists. 1. Synthesis and SAR of α,α- dimethylglycine sulfonamides
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We recently published the extensive in vivo pharmacological characterization of MEN 16132 (J. Pharmacol. Exp. Ther. 2005, 616-623; Eur. J. Pharmacol. 2005, 528, 7), a member of the sulfonamide-containing human B 2 receptor (hB2R) ant
- Fattori, Daniela,Rossi, Cristina,Fincham, Christopher I.,Berettoni, Marco,Calvani, Federico,Catrambone, Fernando,Felicetti, Patrizia,Gensini, Martina,Terracciano, Rosa,Altamura, Maria,Bressan, Alessandro,Giuliani, Sandro,Maggi, Carlo A.,Meini, Stefania,Valenti, Claudio,Quartara, Laura
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p. 3602 - 3613
(2007/10/03)
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- Regioselective synthesis of quinolin-8-ols and 1,2,3,4- tetrahydroquinolin-8-ols by the cyclization of 2-(3-hydroxyphenyl)ethyl ketone 0-2,4-dinitrophenyloximes
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Cyclization of 2-(3-hydroxyphenyl)ethyl ketone 0-2,4- dinitrophenyloximes proceeds on the oxime nitrogen atom by the treatment with NaH and then with 2,3-dichloro-5,6-dicyano-p-benzoquinone and acetic acid to yield quinolin-8-ols regioselectively. The reaction in the presence of Na[BH3(CN)] affords 1,2,3,4-tetrahydroquinolin-8-ols. The present cyclization proceeds via alkylideneaminyl radical intermediates generated by the single electron transfer between 3-hydroxyphenyl and 2,4-dinitrophenyl moieties.
- Uchiyama, Katsuya
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p. 2945 - 2955
(2007/10/03)
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