- Direct C–H Carboxylation Forming Polyfunctionalized Aromatic Carboxylic Acids by Combined Br?nsted Bases
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CO2 fixation into electron-deficient aromatic C–H bonds proceeds with the combined Br?nsted bases LiO-t-Bu and LiO-t-Am/CsF/18-crown-6 (t-Am = CEtMe2) under a CO2 atmosphere to afford a variety of polyfunctionalized aromat
- Hanasaka, Kazuya,Izumi, Koki,Kondo, Yoshinori,Kwon, Eunsang,Nozawa-Kumada, Kanako,Shigeno, Masanori,Tohara, Itsuki,Yamakoshi, Hiroyuki
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supporting information
p. 809 - 814
(2022/02/05)
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- CuI in biorenewable basic medium: Three novel and low E-factor Suzuki-Miyaura cross-coupling reactions
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In this article, we have disclosed three inexpensive and novel copper-catalyzed C(sp2)–C(sp2) coupling reactions of substituted aryl/heteroaryl halides with arylboronic acids by employing water extract of pomegranate ash (WEPA) as biorenewable base and aqueous reaction medium. CuI/WEPA, CuI/WEPA/DABCO, CuI/WEPA/SPhos catalytic systems were developed for the present Suzuki-Miyaura coupling. WEPA has been found to be the effective base and reaction medium for copper-catalysed Suzuki-Miyaura reactions with and without ligands to provide good to high yields of coupling products. This method has remarkable advantages like inexpensive and waste-derived biorenewable base, low catalyst loading, moderate temperature, replacement of precious palladium with abundant copper, no or negligible contamination of copper in products, low E-factor, high chemoselectivity and a large substrate scope.
- Lakshmidevi, Jangam,Naidu, Bandameeda Ramesh,Venkateswarlu, Katta
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- Organic compound, and organic electroluminescent device and electronic device using same
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The invention relates to an organic compound. The structure of the organic compound comprises a formula I. When the organic compound provided by the invention is used for a light-emitting layer of anorganic electroluminescent device, the device efficiency of the device can be effectively improved, and the service life of the organic electroluminescent device is prolonged.
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Paragraph 0157-0159
(2021/02/20)
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- AMINE COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME
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An amine compound is represented by Formula 1. An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode and including an emission
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Paragraph 0397-0399
(2020/02/19)
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- Phosphorescent OLED and hole transporting materials for phosphorescent OLEDS
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The present invention relates to phosphorescent organic light-emitting diodes (OLEDs) including a hole-transporting or a hole-transporting and an electron-blocking layer including an N,N,N′,N′-tetraaryl-phenylene-3,5-diamine or an N,N,N′,N′-tetraaryl-1,1′-biphenyl-3,3′-diamine matrix compound and to new N,N,N′,N′-tetraarylsubstituted m-arylene diamine compounds useful as hole-transporting and electron-blocking layer matrices in phosphorescent OLEDs.
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Page/Page column 13
(2020/12/23)
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- Sulfo-Phenylated Polyphenylenes Containing Sterically Hindered Pyridines
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We systematically investigated the effect of incorporating a sterically hindered pyridyl group into a sulfo-phenylated polyphenylene to control the polymer's physicochemical properties through acid-base interactions. Homopolymers with similar molecular weights and comparable structures that vary by only one atom (N- vs C-) per repeat unit along the polymer chain were prepared. Compared to a non-pyridyl reference membrane, incorporation of a pyridyl group improves the oxidative stability against free radicals, increases the elongation at break to 55% (from 37%), and enhances the thermal stability to 326 °C (from 246 °C). In an accelerated fuel cell degradation test, polymeric membranes containing the sterically encumbered pyridyl unit exhibited exceptional stability (0.16 mV h-1 degradation rate over 1000 h) and retained ~80% of their peak power density over this time.
- Xu, Shaoyi,Adamski, Michael,Killer, Miho,Schibli, Eric M.,Frisken, Barbara J.,Holdcroft, Steven
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p. 2548 - 2559
(2019/03/26)
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- Palladium-catalysed room-temperature Suzuki–Miyaura coupling in water extract of pomegranate ash, a bio-derived sustainable and renewable medium
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An agro waste-derived, ‘water extract of pomegranate ash’ (WEPA), has been utilized for the first time as a renewable medium for Pd(OAc)2-catalysed Suzuki–Miyaura cross-coupling at room temperature. This method offers a simple and sustainable synthesis of biaryls from aryl halides and arylboronic acids under ligand- and external base-free aerobic and ambient conditions. This method has been found effective for both activated and unactivated aryl halides in the production of biaryls with moderate to nearly quantitative yields. The protocol shows high chemoselectivity over identical/similar reactive sites in aryl halides (i.e. selectivity over identical halogens or different halogens of aryl halides). This method exhibits high regioselectivity, i.e. the selective reactivity of a halogen over other identical halogens at different positions on the aromatic nucleus. Therefore, we disclose here a clean, benign, substantial chemo- and regioselective and highly economic alternative method for the palladium-assisted synthesis of biaryls using an agro waste-derived medium.
- Appa, Rama Moorhy,Prasad, S. Siva,Lakshmidevi, Jangam,Naidu, Bandameeda Ramesh,Narasimhulu, Manchala,Venkateswarlu, Katta
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- Synthesis, Characterization, and Catalytic Studies of Dinuclear d8 Metal-Phosphazane Complexes
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Herein we report the synthesis and characterization of two diphosphazane (P-N-P) ligands, along with their corresponding novel palladium and platinum complexes. Compounds were characterized by FTIR and NMR spectroscopy, single crystal X-ray diffraction (S
- Crawley, Matthew R.,Friedman, Alan E.,Cook, Timothy R.
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p. 5692 - 5700
(2018/05/17)
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- A crosslinked bis(amino)-containing polymer as a remarkable support for heterogeneous palladium-catalyzed Suzuki-Miyaura reaction
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Through the substitution reaction of hexachlorocyclotriphosphazene (HCCP) and 4,4′-diaminobiphenyl (DABP), a crosslinked polymer HCCP-DABP was synthesized by a conventional and convenient route. Owing to the strong coordination ability of pincer-type bis(amino) scaffold in the matrix, the polymer was successfully used as a support to form stable palladium catalyst complex Pd/HCCP-DABP. The palladium catalyst showed excellent reactivity in Suzuki-Miyaura cross-coupling reaction. In addition, the catalyst can be readily recovered and reused for further transformations at least 10 times without significant decrease in catalytic activity.
- Wang, Yiming,Lu, Cuifen,Yang, Guichun,Chen, Zuxing,Nie, Junqi
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- Organic light-emitting device, and flat panel display device including the same
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Provided are an organic light emitting device and a flat panel display device including the same. The organic light emitting device comprises: a first electrode, a second electrode facing the first electrode, and an organic layer between the first electrode and the second electrode, wherein the organic layer comprises an emission layer; and the organic layer comprises a compound represented by Formula 1 (As shown in the description).
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Paragraph 0342; 0343; 0344; 0345; 0346
(2017/08/02)
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- COMPOUND FOR ORGANIC ELECTROLUMINESCENT DEVICE AND ORGANIC ELECTROLUMINESCENT DEVICE INCLUDING THE SAME
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This invention relates to a compound for an organic electroluminescent device and to an organic electroluminescent device including the same. This compound for the organic electroluminescent device including the same is improved in thermal stability and l
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Paragraph 0110-0111
(2018/05/15)
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- COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF
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Provided is a compound which is represented by chemical formula 1, wherein the compound exhibits high luminous efficiency and low driving voltage and increases lifespan of a device. Also, provided are an organic electric element using the same and an electronic device thereof.
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Paragraph 0155-0157
(2016/10/31)
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- MATERIAL FOR ORGANIC ELECTROLUMINESCENT ELEMENT AND ORGANIC ELECTROLUMINESCENT ELEMENT PREPARED THEREWITH
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PROBLEM TO BE SOLVED: To provide a material for organic electroluminescent elements having high luminous efficiency. SOLUTION: The present invention provides a compound represented by formula (1). [X is O or S; R1-R4 are H, an alkyl
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Paragraph 0092; 0094
(2018/08/24)
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- An electroluminescent compound and an electroluminescent device comprising the same
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The present invention relates to an organic light-emitting compound applied to an organic electroluminescent device, represented by chemical Formula 1, and having one or more substituents represented by structural formula 1 or structural formula 2. When the organic light-emitting compound is applied as a host compound or a dopant compound in a light-emitting layer, an organic electroluminescent device having excellent light-emitting properties such as a driving voltage, brilliance, and long lifecycle may be obtained.COPYRIGHT KIPO 2016
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Paragraph 0112; 0131-0133; 0209-0211
(2016/12/01)
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- NOVEL AROMATIC HETEROCYCLIC DERIVATIVE, ORGANIC ELECTROLUMINESCENT ELEMENT MATERIAL, ORGANIC ELECTROLUMINESCENT ELEMENT MATERIAL SOLUTION, AND ORGANIC ELECTROLUMINESCENT ELEMENT
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A novel aromatic heterocyclic derivative has a specific structure in its molecule which combines a hole transporting ability and an electron transporting ability. The aromatic heterocyclic derivative is used in a material for an organic electroluminescenc
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Paragraph 0533-0535
(2016/10/09)
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- Condensed-cyclic compound and organic light emitting device comprising the same
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Disclosed are a condensed-ring compound and an organic light emitting device comprising the same. The condensed-ring compound is represented by the chemical formula 1-2 or 1-3. The organic light emitting device comprising the condensed-ring compound can have a low driving voltage, high efficiency, high brightness, and long lifespan.COPYRIGHT KIPO 2016
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Paragraph 0409; 0560; 0561; 0562; 0563; 0564
(2016/10/07)
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- Palladium Nanoparticles Supported on Poly(N-vinyl- imidazole-co-N-vinylcaprolactam) as an Effective Recyclable Catalyst for the Suzuki Reaction
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A recyclable and effective polymer-immobilized ligandless palladium catalyst for the Suzuki reaction has been investigated. Palladium nanoparticles are formed in situ and stabilized by poly(N-vinylimidazole-co-N-vinylcaprolactam). A series of aryl bromides have been studied in the reaction with phenylboronic acid under mild conditions with water-alcohol systems as a solvent that complies with "Green Chemistry" demands. The catalyst can be recycled eight times without appreciable loss in activity and a low degree of palladium leaching. Kinetic studies reveal unusual behavior of the reaction; this can be explained on the basis of the observation of changes to the sizes of the particles during recycling, as determined by TEM results. The suggested mechanism of the reaction is in accordance with the concept of the role of leaching in the process. Fast or slow? Palladium nanoparticles immobilized on poly(N-vinylimidazole-co-N-vinylcaprolactam) reveal unusual kinetic behavior in the Suzuki reaction. This can be explained on the basis of the observation of changes to the sizes of the particles during recycling, and is in accordance with the concept of leaching during the process.
- Selivanova, Alexandra V.,Tyurin, Vladimir S.,Beletskaya, Irina P.
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p. 1278 - 1283
(2016/02/18)
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- NOVEL ORGANIC ELECTROLUMINESCENT COMPOUNDS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
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The present invention relates to a novel organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present invention has high green luminous efficiency and superior material lifespan characteristics, compared with conventional phosphorescent host materials, and thus can provide an organic electroluminescent device which is excellent in operational lifespan, and induces increased power efficiency and improves power consumption.
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Paragraph 172; 173
(2013/11/18)
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- Toward optimization of the linker substructure common to transthyretin amyloidogenesis inhibitors using biochemical and structural studies
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To develop potent and highly selective transthyretin (TTR) amyloidogenesis inhibitors, it is useful to systematically optimize the three substructural elements that compose a typical TTR kinetic stabilizer: the two aryl rings and the linker joining them. Herein, we evaluated 40 bisaryl molecules based on 10 unique linker substructures to determine how these linkages influence inhibitor potency and selectivity. These linkers connect one unsubstituted aromatic ring to either a 3,5-X2 or a 3,5-X2-4-OH phenyl substructure (X = Br or CH3). Coconsideration of amyloid inhibition and ex vivo plasma TTR binding selectivity data reveal that direct connection of the two aryls or linkage through nonpolar E-olefin or -CH2CH2- substructures generates the most potent and selective TTR amyloidogenesis inhibitors exhibiting minimal undesirable binding to the thyroid hormone nuclear receptor or the COX-1 enzyme. Five high-resolution TTR·inhibitor crystal structures (1.4-1.8 A?) provide insight into why such linkers afford inhibitors with greater potency and selectivity.
- Johnson, Steven M.,Connelly, Stephen,Wilson, Ian A.,Kelly, Jeffery W.
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supporting information; experimental part
p. 6348 - 6358
(2009/12/03)
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- ANTHRYLARYLENE DERIVATIVE, MATERIAL FOR ORGANIC ELECTROLUMINESCENT DEVICE, AND ORGANIC ELECTROLUMINESCENT DEVICE USING SAME
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Disclosed is an anthrylarylene derivative having a specific 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 anthrylarylene derivative by itself or as a component of a mixture. Such an organic electroluminescent device has high luminous efficiency and long life. Further disclosed is an anthrylarylene derivative having an adequate glass transition temperature which is particularly suitable as a light-emitting material to be used in the above-described organic EL device.
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Page/Page column 46-47
(2008/06/13)
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- Bisubstrate reaction templates. Examination of the consequences of identical versus different binding sites
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A reaction template (1≈9) possessing two binding sites is described. The template was designed to use hydrogen bonding to simultaneously (but transiently) bind two substrates, giving rise to a ternary complex (2≈12), which positions the substrates in an o
- Ross Kelly,Bridger, Gary J.,Zhao, Chen
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p. 8024 - 8034
(2007/10/02)
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