- Antiaromaticity in distal bisfluorenyl dications separated by multiple discrete spacer units
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(Chemical Equation Presented) The effect of spacers on the antiaromaticity of bisfluorenyl dications was examined. For systems such as 4a-c in which extensive delocalization of the positive charge through the π-system is not possible, a relationship based primarily on localized hyperconjugation as well as the distance between the fluorenyl systems and their antiaromaticity was demonstrated. Dications 2a-c and 3a-c also show the relationship, but it is further modulated by delocalization through the π-system. Calculated assessment of antiaromaticity was supported by experimental shifts for 2a,b and 3a-c.
- Dahl, Bart J.,Mills, Nancy S.
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Read Online
- Synthesis and biological evaluation of novel bis-quaternary ammonium compounds with p-terphenyl spacer
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Novel bis-quaternary ammonium compounds with a p-terphenyl spacer between two pyridinium heads were synthesized. Hit compound with C8H17 aliphatic substituent is superior to known benzalkonium chloride, miramistin and chlorhexidine bisgluconate in MIC values against five pathogenic bacteria.
- Dorofeeva, Evgeniya O.,Egorov, Mikhail P.,Frolov, Nikita A.,Hansford, Karl A.,Konyuhova, Valeria Yu.,Vereshchagin, Anatoly N.
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Read Online
- Novel compound and organic light emitting device comprising the same
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The present invention provides a novel compound and an organic light emitting device using the same, wherein the compound is represented by formula 1. The compound can improve lifespan characteristics in the organic light emitting device.COPYRIGHT KIPO 2020
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Paragraph 0189-0193
(2020/06/02)
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- Triptycenyl Sulfide: A Practical and Active Catalyst for Electrophilic Aromatic Halogenation Using N-Halosuccinimides
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A Lewis base catalyst Trip-SMe (Trip = triptycenyl) for electrophilic aromatic halogenation using N-halosuccinimides (NXS) is introduced. In the presence of an appropriate activator (as a noncoordinating-anion source), a series of unactivated aromatic compounds were halogenated at ambient temperature using NXS. This catalytic system was applicable to transformations that are currently unachievable except for the use of Br2 or Cl2: e.g., multihalogenation of naphthalene, regioselective bromination of BINOL, etc. Controlled experiments revealed that the triptycenyl substituent exerts a crucial role for the catalytic activity, and kinetic experiments implied the occurrence of a sulfonium salt [Trip-S(Me)Br][SbF6] as an active species. Compared to simple dialkyl sulfides, Trip-SMe exhibited a significant charge-separated ion pair character within the halonium complex whose structural information was obtained by the single-crystal X-ray analysis. A preliminary computational study disclosed that the πsystem of the triptycenyl functionality is a key motif to consolidate the enhancement of electrophilicity.
- Nishii, Yuji,Ikeda, Mitsuhiro,Hayashi, Yoshihiro,Kawauchi, Susumu,Miura, Masahiro
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supporting information
p. 1621 - 1629
(2020/02/04)
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- AMINE COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME
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An organic light-emitting device and an amine compound, the amine compound being represented by Formula 1:
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Paragraph 0356-0358
(2019/12/31)
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- Synthesis of 4, 4' - dibromo P-terphenyl method (by machine translation)
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The invention relates to a method for synthesizing 4, 4 '- dibromo P-terphenyl of the method, the method comprises: in 100 - 110 °C temperature, so that the terphenyl, liquid bromine and at least one organic solvent, in the presence of a catalyst reaction under the condition of 24 - 48 hours, to obtain the 1st reaction mixture, wherein the terphenyl and bromine molar ratio of 1: (2.25 - 2.75); cooling to 25 - 30 °C, using methanol after washing, filtering to obtain 1st crude product; purifying the crude product 1st, to obtain the product 4, 4' - dibromo P-terphenyl. Beneficial effect of the application is not using any catalyst, yield is still as high as 70%, reduces the cost, simplifies the after-treatment process, for the realization of the 4, 4' - dibromo P-terphenyl for industrial production of the technical support. (by machine translation)
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Paragraph 0043-0044; 0046-0048; 0050-0051
(2018/08/28)
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- Synthesis of p-Quinquephenyl from E,E-1,4-Bis(4-bromophenyl)-1,3-butadiene
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p-Quinquephenyl was synthesized in five steps from E,E-1,4-bis(4- bromophenyl)-1,3-butadiene in 34% overall yield. The butadiene was prepared in six steps from 4-bromobenzaldehyde in 35% overall yield. Copyright Taylor & Francis Group, LLC.
- Davis, Matthew C.,Groshens, Thomas J.
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experimental part
p. 206 - 218
(2011/03/18)
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- Process for the preparation of aryl-diamines
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A process for forming a N,N′-diaryl-N,N′-di(hydroxyaryl)-aryl-diamine compound includes reacting a halogenated aryl compound with an etherified diarylamine in the presence of a catalyst, then deprotecting the resulting N,N′-diaryl-N,N′-di(alkyl-oxyaryl)-a
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Page/Page column sheet 2; 7
(2009/06/27)
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- Electron-Conjugated Organic Silane Compound and Production Method Thereof
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The present invention provides a π-electron-conjugated organice silane compound that give an organic thin film superior in peeling restance, orientation, crystallinity and eletroconductive properties, and a production method thereof. A π-electron-conjugated organice silane compound represented by General Formula: R1-SiX1X2X3 (R1 represents an organic group having a particular monocyclic heterocyclic unit; and X1 to X3 are a group giving a hydroxyl group by hydrolysis). A method of producing the organic silane compound, comprising allowing a compound represented by General Formula: R1-Li (R1 is the same as above) or a compound represented by General Formula: R1-MgX5 (R1 is the same as above; and X5 represents a halogen atom) with a compound represented by General Formula: X4-SiX1X2X3 (X1 to X3 are the same as above; and X4 represents a hydrogen or halogen atom or a lower alkoxy group). A π-electron-conjugated organic silane compound represented by General Formula; Z-(R11)m-SiR12R13R14 (Z represents a organice group derived froma particular fused polycyclic heterocyclic compound; R11 represents a bivalent organic group; m is 0 to 10; and R12 to R14 represents a halogen atom or an alkoxy group). A method of producing the organic silane compound, comprising allowing a compound represented by General Formula: Z-(R11)m-MgX30 (Z, R11 and m are the same as above; and X30 represents a halogen atom) to react with a compound represented by General Formula: X31-SiR12R13R14 (X31 represents a hydrogen or halogen atom or an alkoxy group; and R12 to R14 are the same as above).
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Page/Page column 26
(2009/01/24)
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- AROMATIC TRIAMINE COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE USING SAME
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Disclosed is an aromatic triamine compound of specific structure having at least one terphenyl structure. Also disclosed is an organic electroluminescent device wherein an organic thin film composed of one or more layers including at least a light-emitting layer is interposed between a cathode and an anode, and at least one layer in the organic thin film contains the aromatic triamine compound by itself or as a component of a mixture. Such an organic electroluminescent device has high luminous efficiency and long life, and the above-mentioned aromatic triamine compound enables to realize such an organic electroluminescent device.
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Page/Page column 45-48
(2008/06/13)
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- Aromatic triamine compound and organic electroluminescence device using the same
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Provided are an aromatic triamine compound of a specific structure having at least one terphenyl structure and an organic electroluminescence device in which an organic thin film layer comprising a single layer or plural layers having at least a luminescent layer is interposed between a cathode and an anode, wherein at least one layer of the above organic thin film layers contains the aromatic triamine compound described above in the form of a single component or a mixed component, and provided are the organic electroluminescence device having a high luminous efficiency and a long life and the novel aromatic triamine compound for materializing the same.
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- Charged paracyclophanes behave as annulenes with enhanced anisotropy
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Paracyclophanes, in which benzene units are linked at the 1,4 positions by ethylene bridges (1-4), show annulene characteristics upon charging. The dependence of the magnetic properties of these charged rigid systems on the number of π-electrons in the peripheries has been studied systematically. For the first time it can be shown that upon extensive reduction, two observable diatropic anionic stages exist (for 3). The results of advanced DFT calculations are in line with the experimental results. The limit on the number of π-electrons in the periphery of annulenes, which still exhibit aromatic or anti-aromatic behavior, is extended far beyond the number of 26.
- Shabtai, Elad,Segev, Omri,Beust, Ronald,Rabinovitz, Mordecai
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p. 1233 - 1241
(2007/10/03)
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