Directing Group‐Promoted Inert C−O Bond Activation Using Versatile Boronic Acid as a Coupling Agent
作者:Ram Ambre、Ting‐Hsuan Wang、Anmei Xian、Yu‐Shiuan Chen、Yu‐Fu Liang、Titel Jurca、Lili Zhao、Tiow‐Gan Ong
DOI:10.1002/chem.202004132
日期:2020.12.18
strategy facilitates the efficient catalytic cross‐coupling of methoxyarenes with a variety of organoboronreagents. Directing groups facilitate the activation of inert C−O bonds in under‐utilized aryl methyl ethers enabling their adaptation for C−C cross‐coupling reactions as less toxic surrogates to the ubiquitous haloarenes. The method reported enables C−C cross‐coupling with readily available and economical
Ruthenium(<scp>ii</scp>)-catalyzed ortho-C–H arylation of diverse N-heterocycles with aryl silanes by exploiting solvent-controlled N-coordination
作者:Pradeep Nareddy、Frank Jordan、Michal Szostak
DOI:10.1039/c7ob00818j
日期:——
We report the first method for the direct, regioselectiveRu(II)-catalyzed oxidative arylation of C–H bonds in diverse N-heterocycles with aryl silanes by exploiting solvent-controlled N-coordination. The reaction takes advantage of the attractive features of organosilanes as coupling partners, providing proof of concept for N-directed Ru(II)-catalyzed C–H arylation. This novel, operationally-simple
Rhodium-catalysed direct ortho arylation of 2-arylpyridines with arylstannanes via C–H activation
作者:Shuichi Oi、Susumu Fukita、Yoshio Inoue
DOI:10.1039/a806790b
日期:——
The ortho position of the aromatic ring of pyridyl group-substituted aromatic compounds was directly arylated with tetraarylstannanes in the presence of a catalytic amount of a rhodium(I)âphosphine complex.
Electroluminescent material and electroluminescent element
申请人:KONICA CORPORATION
公开号:EP1764401A1
公开(公告)日:2007-03-21
An electroluminescent element is disclosed, comprising an electroluminescent material and a fluorescent substance emitting light having an emission maximum at the wavelength different from that of light emitted from the electroluminescent material upon absorption of the light emitted from the electroluminescent material.
[GRAPHICS]The ortho position of the aromatic ring of pyridyl group-substituted aromatic compounds is directly arylated or alkenylated with organic halides in the presence of a catalytic amount of a ruthenium(II)-phosphine complex.