- Non-c2-symmetric bis-benzimidazolium salt applied in the synthesis of sterically hindered biaryls
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A novel non-C2-symmetric bis-benzimidazolium salt derived from (±)-valinol has been prepared by a simple and straightforward process in good yield. The structure of bis-benzimidazolium salt provided a bulky steric group on the ethylene bridge; which facilitates the catalytic efficacy in the C(sp2 )–C(sp2 ) formation. Its catalytic activity in Suzuki–Miyaura cross-coupling reaction of unactivated aryl chlorides has been found to have high efficacy in 1 mol% Pd loading. This protocol demonstrated the potential on the synthesis of sterically hindered biaryls.
- Chen, Yen-Hsin,Hsu, Tung-Yu,Huang, Shu-Jyun,Hung, Pei-Yu,Lee, Dong-Sheng,Lu, Ta-Jung,Wei, Ting-Rong
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- AROMATIC AMINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING SAME
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The present invention relates to an organic light emitting compound which is aromatic amine derivatives expressed as chemical formula A and has excellent light emitting properties such as brightness and light emitting efficiency compared with those of an existing light emitting material. Accordingly, an organic electroluminescent device comprising the same has excellent light emitting properties.
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Paragraph 0193-0198
(2021/04/20)
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- AROMATIC AMINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING SAME
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The present invention is an organic light emitting compound characterized by an aromatic amine derivative represented by chemical formula A. The aromatic amine derivative has excellent light emitting properties such as brightness, luminous efficiency, etc
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Paragraph 0159-0163
(2021/05/18)
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- Synthesis of seven-membered lactones by regioselective and stereoselective iodolactonization of electron-deficient olefins
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A regio- A nd stereoselective iodolactonization of internal electron-deficient olefinic acids has been reported, which provides a straightforward access to a series of multi-functionalized seven-membered lactones containing two consecutive chiral centers. The ester substituents on the olefins played a key role in achieving high regioselectivity. This result was proved through experiments and DFT calculations.
- Ke, Zhuofeng,Li, Ming,Liu, Yue-Jin,Luo, Xiao-Peng,Shao, You-Xiang,Tang, Pan-Ting,Wang, Liang-Neng,Wei, Yi,Zeng, Ming-Hua,Zhang, Ni-Juan
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supporting information
p. 6680 - 6683
(2020/07/03)
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- Visible-Light-Induced Arene C(sp 2)-H Lactonization Promoted by DDQ and tert -Butyl Nitrite
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A visible-light photocatalytic aerobic oxidative lactonization of arene C(sp 2)-H bonds proceeds in the presence of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and tert -butyl nitrite (TBN). Under the optimized conditions, a range of 2-arylbenzoic acids is converted into the corresponding benzocoumarin derivatives in moderate to excellent yields. This method is characterized by its atom economy, mild reaction conditions, the use of a green oxidant and metal-free catalysis.
- Chen, Bajin,Hu, Baoxiang,Hu, Xinquan,Jin, Liqun,Li, Meichao,Shen, Zhenlu,Sun, Nan,Wang, Shengpeng,Wang, Yiqing
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supporting information
p. 261 - 266
(2020/02/18)
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- Exploration of Biaryl Carboxylic Acids as Proton Shuttles for the Selective Functionalization of Indole C-H Bonds
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A survey of diversely substituted 2-arylbenzoic acids were synthesized and tested for use as proton shuttle in the direct arylation of indoles with bromobenzenes. It was found that 3-ethoxy-2-phenylbenzoic acid gives superior yield and selectivity for this class of substrates.
- Pi, Jing-Jing,Lu, Xiao-Yu,Liu, Jing-Hui,Lu, Xi,Xiao, Bin,Fu, Yao,Guimond, Nicolas
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p. 5791 - 5800
(2018/05/14)
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- Differentially Substituted Phosphines via Decarbonylation of Acylphosphines
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A new route to phosphines was developed by a method that features a "pre-join and transform" process that proceeds via acylphosphine intermediates that may be readily prepared from carboxylic acids and disubstituted phosphines. The efficient decarbonylations of these acylphosphines using a nickel catalyst delivered the corresponding phosphines. This method shows that the carboxyl group can play a role similar to halides or triflates for introducing a substituted phosphorus atom on an aromatic ring.
- Yu, Rongrong,Chen, Xingyu,Martin, Stephen F.,Wang, Zhiqian
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p. 1808 - 1811
(2017/04/11)
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- Aromatic amine luminous compound and organic electroluminescence device manufactured through same
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The invention provides an aromatic amine luminous compound. The aromatic amine luminous compound has good heat stability, high luminous efficiency and high luminous purity, and can be used for manufacturing an organic electroluminescence device and applied to the field of organic solar cells or organic thin-film transistors or organic photoreceptors. The invention further provides the organic electroluminescence device which comprises an anode, a cathode and an organic layer. The organic layer comprises one or more of a luminous layer, a hole injection layer, a hole transfer layer, a hole blocking layer, an electron injection layer and an electron transfer layer. At least one layer in the organic layer comprises the compound shown in the structural formula I shown in the description.
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Paragraph 0049; 0050; 0051
(2016/10/09)
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- A kind of organic compound and its use this organic compound electroluminescent device
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The invention relates to an organic compound. The organic compound has a structure represented in a formula I, wherein R1, R2 and R3 are independently selected from hydrogen atom, substituted or non-substituted C1-C30 alkyl, substituted or non-substituted C1-C30 naphthenic base, substituted or non-substituted C1-C30 alkoxy, substituted or non-substituted C6-C30 aryl, substituted or non-substituted C6-C30 aryloxy, substituted or non-substituted C6-C30 arylamine, substituted or non-substituted C2-C30 heterocyclic ring, substituted or non-substituted C6-C30 condensed polycyclic group, hydroxyl, cyano group and substituted or non-substituted amino, respectively. Furthermore, the invention relates to an electroluminescent device, wherein the electroluminescent device comprises a hole injection layer and/or a hole transport layer using at least one of the compounds.
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Paragraph 0035-0037;0038
(2016/10/08)
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- Using this new organoelectroluminescent compound and an organic electroluminescence element
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Disclosed are novel organic electroluminescent compounds and organic electroluminescent devices comprising the same. With good luminous efficiency and excellent color purity and life property, the organic electroluminescent compounds according to the inve
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Paragraph 0041
(2016/10/08)
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- Synthesis of fluorenones through rhodium-catalyzed intramolecular acylation of biarylcarboxylic acids
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An efficient approach to the synthesis of fluorenones via the rhodium-catalyzed intramolecular acylation of biarylcarboxylic acids was developed. Using this procedure, fluorenones with various substituents can be synthesized in good to high yields. This work marks the first recorded use of catalytic intramolecular acylation to synthesize fluorenones.
- Fukuyama, Takahide,Maetani, Shinji,Miyagawa, Kazusa,Ryu, Ilhyong
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supporting information
p. 3216 - 3219
(2014/07/08)
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- NOVEL ORGANIC ELECTROLUMINESCENT COMPOUNDS AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME
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Provided are novel organic electroluminescent compounds and an organic electroluminescent device using the same. Because the organic electroluminescent device using the organic electroluminescent compound as a hole transport material or a hole injection material exhibits good luminous efficiency and excellent lifetime properties, it is used to manufacture OLED devices having superior operating lifetime and consuming less power due to improved power efficiency.
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Page/Page column 24-25
(2012/02/13)
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- Palladium-catalyzed arylation of α,α-disubstituted arylmethanols via cleavage of a C-C or a C-H bond to give biaryls
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The palladium-catalyzed arylation of α,α-disubstituted arylmethanols with aryl halides proceeds not only via C-H bond cleavage at the ortho-position, but also via cleavage of the sp2-sp3 C-C bond with the liberation of ketones (β-carbon elimination) to give the corresponding biaryls. Both reactions appear to occur through common arylpalladium(II) alcoholate intermediates. The results of systematic studies with respect to which C-C or C-H bond is preferentially cleaved in the arylation are reported. Among the important findings is the selective elimination of ortho-substituted aryl groups even from aryl(diphenyl)methanols due to steric reasons. Thus, various biaryls having ortho-substituents can be produced efficiently by treatment of the corresponding aryl(diphenyl or dimethyl)methanols with aryl bromides and chlorides.
- Terao, Yoshito,Wakui, Hiroyuki,Nomoto, Michiyo,Satoh, Tetsuya,Miura, Masahiro,Nomura, Masakatsu
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p. 5236 - 5243
(2007/10/03)
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