- Synthesis and Structure of a Propeller-Shaped Polycyclic Aromatic Hydrocarbon Containing Seven-Membered Rings
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The synthesis and structure of a C3-symmetric propeller-shaped polycyclic aromatic hydrocarbon that bears three seven-membered rings is reported. The synthesis was accomplished in three steps from benzo[c]naphtho[2,1-p]chrysene, including a Pd-catalyzed intramolecular C-H arylation for the formation of the seven-membered rings. The combination of the helicities (P/M) of the three seven-membered-ring moieties and three [4]helicene moieties affords 24 possible conformers, and two relatively stable conformations were observed by 1H NMR spectroscopy.
- Kawai, Kazuya,Kato, Kenta,Peng, Lingqing,Segawa, Yasutomo,Scott, Lawrence T.,Itami, Kenichiro
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- NEW PRECURSORS TO SILAFLUORENES
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Conversion of 2,2'-dibromo-4,4'-di-t-butylbiphenyl and o-bromo-o'-chlorobiphenyl to organometallic reagents suitable for reaction with Me2SiCl2 to produce silafluorene has been developed.
- Corey, Joyce Y.,Chang, Lihsueh S.
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- Organic compound and, electronic component using same, and electronic device
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The invention belongs to the field of organic materials, and relates to an organic compound and and an electronic device using the same, wherein the organic compound has the structure shown in Chemical Formula 1, and the organic compound is applied to an organic electroluminescent device.
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Paragraph 0121-0126
(2021/12/07)
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- COMPOSITION FOR ORGANIC OPTOELECTRONIC DEVICE, ORGANIC OPTOELECTRONIC DEVICE, AND DISPLAY DEVICE
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A composition for an organic optoelectronic device, an organic optoelectronic device, and a display device, the composition including a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2,
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Paragraph 0141-0143
(2022/01/08)
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- A site-selective and stereospecific cascade Suzuki-Miyaura annulation of alkyl 1,2-bisboronic esters and 2,2′-dihalo 1,1′-biaryls
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A cascade Suzuki-Miyaura cross-coupling giving rise to 9,10-dihydrophenanthrenes has been developed. Using biaryls with unsymmetrical substitution-pattern full site-selectivity was observed. Furthermore, this cross-coupling of an alkyl 1,2-bisboronic pinacol ester proceeds through the challenging coupling of a secondary boronate with complete stereoretention.
- Willems, Suzanne,Toupalas, Georgios,Reisenbauer, Julia C.,Morandi, Bill
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supporting information
p. 3909 - 3912
(2021/04/26)
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- Nitrogen-containing compound, organic electroluminescent device, and electronic device
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The invention provides a nitrogen-containing compound, an organic electroluminescent device and an electronic device, and belongs to the technical field of organic materials. The nitrogen-containing compound has a carbazole structure and a fluorenyl group, and the carbazole structure and the fluorenyl group cooperate with each other and have a high first triplet state energy level, so that the nitrogen-containing compound is suitable for being used as a main body material of a light-emitting layer in the organic electroluminescent device. The nitrogen-containing compound can improve the performance of the organic electroluminescent device.
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Paragraph 0181-0185
(2020/08/06)
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- Visible-Light-Promoted, Catalyst-Free Gomberg-Bachmann Reaction: Synthesis of Biaryls
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Biaryls were synthesized via a novel visible-light-promoted Gomberg-Bachmann reaction that does not require a photosensitizer or any metal reagents. The formation of an electron donor-acceptor complex between aryl diazonium salts and pyridine allows, under visible-light irradiation, the synthesis of biaryls in moderate-to-high yields.
- Lee, Juyoung,Hong, Boseok,Lee, Anna
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p. 9297 - 9306
(2019/08/12)
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- AROMATIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME
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The present specification provides an aromatic compound and an organic light emitting device comprising the same. The compound described in the present specification can be used as a material for hole injection, hole transporting, hole injection and hole transporting, electron retarding, light emitting, hole control, electron transporting, or electron injection.COPYRIGHT KIPO 2017
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Paragraph 0276; 0308-0310
(2017/08/02)
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- ORGANIC ELECTROLUMINESCENT COMPOUNDS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
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The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound of the present disclosure is effective in preparing an organic electroluminescen
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Paragraph 136; 141; 142
(2017/03/08)
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- Mild, visible light-mediated decarboxylation of aryl carboxylic acids to access aryl radicals
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Herein we present the first example of aryl radical formation via the visible light-mediated decarboxylation of aryl carboxylic acids using photoredox catalysis. This method constitutes a mild protocol for the decarboxylation of cheap and abundant aryl carboxylic acids and tolerates both electron-rich substrates and those lacking ortho-substitution. The in situ formation of an acyl hypobromite is proposed to prevent unproductive hydrogen atom abstraction and trapping of the intermediate aroyloxy radical, enabling mild decarboxylation.
- Candish,Freitag,Gensch,Glorius
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p. 3618 - 3622
(2017/07/11)
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- Palladium-catalyzed R2(O)P directed C(sp2)-H acetoxylation
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A novel and efficient Pd-catalyzed C-H acetoxylation is described. The approach uses R2(O)P as a directing group to synthesize various substituted 2′-phosphorylbiphenyl-2-OAc compounds. Notably, the reaction exhibits smooth operation under mild conditions and shows good functional group tolerance. Products are obtained with high selectivity and yields. This journal is the Partner Organisations 2014.
- Zhang, Heng,Hu, Rong-Bin,Zhang, Xiao-Yu,Li, Shi-Xia,Yang, Shang-Dong
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supporting information
p. 4686 - 4689
(2014/05/06)
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- Synthesis of functionalized dibenzothiophenes- An efficient three-step approach based on Pd-catalyzed C-C and C-S bond formations
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A novel and efficient three-step protocol for synthesizing functionalized dibenzothiophenes (DBTs) from common starting materials and by using palladium-catalyzed carbon-carbon and carbon-sulfur bond formations is presented. The reaction conditions offer significantly improved functional-group tolerance and regioselectivity as compared to previously reported methods. A flexible and concise three-step protocol for the synthesis of functionalized dibenzothiophenes DBTs from readily available starting materials is presented. The method is based on two palladium-catalyzed reactions to prepare the masked thiophenols 4followed by deprotection and in situ cyclization to form the DBT skeleton. This approach offers improved functional-group tolerance as well as regiocontrol in the synthesis of functionalized DBTs as compared to previously reported methods.
- Jepsen, Tue Heesgaard,Larsen, Mogens,Jorgensen, Morten,Solanko, Katarzyna A.,Bond, Andrew D.,Kadziola, Anders,Nielsen, Mogens Brondsted
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supporting information; experimental part
p. 53 - 57
(2011/03/21)
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- Achieving conformational control over C-C, C-N and C-O bonds in biaryls, N,N′-diarylureas and diaryl ethers: Advantages of a relay axis
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The orientation of Ar-C, Ar-N and Ar-O bonds in biaryls, N,N′-diarylureas and diaryl ethers (whose conformers are distinguishable by NMR) may be controlled with a selectivity up to >95: 5 by an adjacent stereogenic centre; the selectivity may be greater when a second stereogenic axis is inserted between the controlling centre and the slowly rotating bond. The Royal Society of Chemistry.
- Betson, Mark S.,Bracegirdle, Ann,Clayden, Jonathan,Helliwell, Madeleine,Lund, Andrew,Pickworth, Mark,Snape, Timothy J.,Worrall, Christopher P.
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p. 754 - 756
(2007/10/03)
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