ORGANIC ELECTROLUMINESCENCE DEVICE AND ANTHRACENE DERIVATIVE
申请人:IKEDA Hidetsugu
公开号:US20110034744A1
公开(公告)日:2011-02-10
An anthracene derivative having a specific asymmetric structure is provided. The asymmetric anthracenes are useful in an organic electroluminescence device and exhibit efficient light emission and a long performance lifetime.
NAPHTHALENE DERIVATIVE, MATERIAL FOR ORGANIC ELECTROLUMINESCENCE DEVICE, AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME
申请人:Kawamura Masahiro
公开号:US20090008605A1
公开(公告)日:2009-01-08
A naphthalene derivative represented by the following formula (1) is provided. In the formula, Ar
1
to Ar
4
each represent an aromatic hydrocarbon cyclic group having 6 to 18 carbon atoms forming a ring. The aromatic hydrocarbon cyclic group has none of anthracene skeleton, pyrene skeleton, aceanthrylene skeleton and naphthacene skeleton. n, m and 1 each represent an integer in a range of 1 to 5. p represents an integer in a range of o to 5. When n, m, 1 and p each are 2 or more, a plurality of Ar
1
to Ar
4
may be mutually the same or different.
Arylmetals are highly valuable carbon nucleophiles that are readily and inexpensively prepared fromarylhalides or arenes and widely used on both laboratory and industrial scales to react directly with a wide range of electrophiles. Although C−Cbond formation has been a staple of organic synthesis, the direct transfer of primary amino (−NH2) and hydroxyl (−OH) groups to arylmetals in a scalable and environmentally
Selective Mechanochemical Monoarylation of Unbiased Dibromoarenes by <i>in Situ</i> Crystallization
作者:Tamae Seo、Koji Kubota、Hajime Ito
DOI:10.1021/jacs.0c01739
日期:2020.6.3
Palladium-catalyzed Suzuki-Miyaura cross-coupling reactions of liquid, unbiased dibromoarenes under mechanochemical conditions selectively afford the monoarylated products. The lower reactivity of the crystalline monoarylated products rela-tive to the liquid starting materials should be attributed predom-inantly to the low diffusion efficiency of the former in the re-action mixture, which results in
Abstract A ligand-free nickel-catalyzed Kumada cross-coupling of aryl bromides and tert-butyl Grignardreagents led to the formation of a series of tert-butyl aryls in moderate to good yields, excellent tBu/iBu ratios, and good functional group compatibility. A radical coupling process is indicated and a mechanism with a Ni(I)-Ni(III) catalytic cycle is proposed.