14159-55-8Relevant academic research and scientific papers
Transition metal complex, polymer, mixture, composition and organic electronic device
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Paragraph 0207-0209, (2021/07/01)
The invention discloses a transition metal complex. The complex is represented by general formula (1) shown in the specification, G in the specification is selected from cycloalkane or a cage group, and the cage group is coordinated with a metal center in a monovalent anion form to obtain a more stable complex structure. The transition metal complex provided by the invention is used in an OLED, especially as a luminescent layer doping material, not only can provide higher luminous efficiency and longer device life, but also can improve the brightness and current efficiency of the device, and meanwhile, reduces the starting voltage to prolong the service life of the device.
Enantioselective Ni-Catalyzed Electrochemical Synthesis of Biaryl Atropisomers
Chen, Song,Chen, Yue-Gang,Gao, Pei-Sen,Liu, Dong,Ma, Hong-Xing,Mei, Tian-Sheng,Qiu, Hui,Shuai, Bin,Wang, Yun-Zhao
, p. 9872 - 9878 (2020/06/27)
A scalable enantioselective nickel-catalyzed electrochemical reductive homocoupling of aryl bromides has been developed, affording enantioenriched axially chiral biaryls in good yield under mild conditions using electricity as a reductant in an undivided cell. Common metal reductants such as Mn or Zn powder resulted in significantly lower yields in the absence of electric current under otherwise identical conditions, underscoring the enhanced reactivity provided by the combination of transition metal catalysis and electrochemistry.
Borane-Catalyzed Chemoselective and Enantioselective Reduction of 2-Vinyl-Substituted Pyridines
Hu, Chen-Yu,Li, Xiang,Liang, Xin-Shen,Liu, Ning,Tian, Jun-Jie,Tu, Xian-Shuang,Wang, Xiao-Chen,Yang, Zhao-Ying
supporting information, p. 18452 - 18456 (2020/08/21)
Herein, we report that highly chemoselective and enantioselective reduction of 2-vinyl-substituted pyridines has been achieved for the first time. The reaction, which uses chiral spiro-bicyclic bisboranes as catalysts and HBpin and an acidic amide as reducing reagents, proceeds through a cascade process involving 1,4-hydroboration followed by transfer hydrogenation of a dihydropyridine intermediate. The retained double bond in the reduction products permits their conversion to natural products and other useful heterocyclic compounds by simple transformations.
Green phosphorescent compound and organic electroluminescence device using same
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Paragraph 0081-0083, (2019/06/13)
The invention discloses a green phosphorescent compound and an organic electroluminescence device using the same. An anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode are sequentially deposited in the organic electroluminescence device. The organic electroluminescent device can use the green phosphorescent compound shown by the formula (I) as shown in the specification as a dopant of the light emitting layer, wherein n is 1 or 2.
Green phosphorescent compound and organic electroluminescent device using same
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Paragraph 0086-0088, (2019/08/12)
The invention discloses a green phosphorescent compound and an organic electroluminescent device using the same. The organic electroluminescent device includes an anode, a hole injection layer, a holetransport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode which are sequentially deposited from each other. The organic electroluminescent devicecan use a phosphorescent compound represented by a following formula (1) as a dopant for the light emitting layer, wherein R1, R2, R3, R4, R5, R6, R7, R8 and R9 are each independently substituted orunsubstituted C1-C6 alkyl, C1-C6 alkoxyl, or halogens. The green phosphorescent material has the advantages of high efficiency, high color purity and narrow spectrum effect.
Manganese-Catalyzed Direct Nucleophilic C(sp2)-H Addition to Aldehydes and Nitriles
Zhou, Bingwei,Hu, Yuanyuan,Wang, Congyang
, p. 13659 - 13663 (2015/11/16)
Herein, a manganese-catalyzed nucleophilic addition of inert C(sp2)-H bonds to aldehydes and nitriles is disclosed by virtue of a dual activation strategy. The reactions feature mild reaction conditions, excellent regio- and stereoselectivity, and a wide substrate scope, which includes both aromatic and olefinic C-H bonds, as well as a large variety of aldehydes and nitriles. Moreover, mechanistic studies shed light on possible catalytic cycles.
Rhodium-Catalyzed Cyanation of C(sp2)-H Bond of Alkenes
Chaitanya, Manthena,Anbarasan, Pazhamalai
supporting information, p. 3766 - 3769 (2015/08/18)
Efficient and selective rhodium-catalyzed cyanation of chelation-assisted C-H bonds of alkenes has been accomplished using environmentally benign N-cyano-N-phenyl-p-methylbenzenesulfonamide (NCTS) as a cyanating reagent. The developed methodology tolerates various functional groups and allows the synthesis of diverse substituted acrylonitriles in good to excellent yields. Furthermore, the potential of the methodology was demonstrated through the formal synthesis of chlorpheniramine-based antagonist.
Gold-catalyzed one-step construction of 2,3-dihydro-1H-pyrrolizines with an electron-withdrawing group in the 5-position: A formal synthesis of 7-methoxymitosene
Yan, Ze-Yi,Xiao, Yuanjing,Zhang, Liming
scheme or table, p. 8624 - 8627 (2012/09/25)
What a ring formation! Bicyclic dihydropyrrolizines with an electron-withdrawing group (EWG) at the 5-position are formed in one step from linear azidoenynes under gold catalysis. This novel route involves the use of azide as a nitrene precursor, electronically-controlled regioselectivity, and the generation of destabilized 1-azapentadienium ions and their pericyclic reactions. This method was used for a formal synthesis of 7-methoxymitosene (see scheme).
A one pot in situ combined Shapiro-Suzuki reaction
Passafaro, Marco S.,Keay, Brian A.
, p. 429 - 432 (2007/10/02)
The Shapiro and Suzuki reactions have been combined in situ to provide aryl-alkenes in moderate to good yields without the isolation of boron containing intermediates.
