cas 4433-10-7, 24DIMETHYLBIPHENYL | Articles data

Articles about 4433-10-7Total 6 be found

Palladium-Catalyzed Arylation of Arylboronic Acids with Yagupolskii-Umemoto Reagents
A Pd-catalyzed Suzuki cross-coupling of arylboronic acids with Yagupolskii-Umemoto reagents was explored. In contrary to trifluoromethylations, the Pd-catalyzed reaction of R-B(OH)2 and [Ar2SCF3]+[OTf]- provided the arylation products (R-Ar) in good to high yields. The reaction confirms that the S-Ar bonds of [Ar2SCF3]+[OTf]- can be readily cleaved in the presence of Pd complexes. The relatively electron-poor aryl groups of asymmetric [Ar1Ar2SCF3]+[OTf]- salts are more favorably transferred compared to the electron-rich ones. This reaction represents the first report of utilization of [Ar2SCF3]+[OTf]- as arylation reagents in organic synthesis.
Wang, Shi-Meng,Wang, Xiao-Yan,Qin, Hua-Li,Zhang, Cheng-Pan
p. 6542 - 6546
(2016/05/02)

Palladium-catalyzed arylation of simple arenes with iodonium salts
The development of an arylation protocol for simple arenes with diaryliodonium salts using the Herrmann-Beller palladacycle catalyst is reported. The reaction takes simple aromatic feedstocks and creates valuable biaryls for use in all sectors of the chem
Storr, Thomas E.,Greaney, Michael F.
supporting information
p. 1410 - 1413
(2013/05/09)

Iron-mediated direct arylation of unactivated arenes
(Chemical Equation Presented) Inexpensive and straightforward: An iron-mediated cross-coupling reaction generates biaryl compounds through C-H bond activation, using easily handled reagents with low toxicity. Under the optimized reaction conditions a series of substituted phenylboronic acids were coupled with several simple unactivated arenes.
Wen, Jun,Zhang, Ji,Chen, Shan-Yong,Li, Jing,Yu, Xiao-Qi
supporting information; experimental part
p. 8897 - 8900
(2009/05/26)

meta-directing cobalt-catalyzed diels-alder reactions
(Chemical Equation Presented) Overcoming the ortho/para rule? The regioselectivity of Diels-Alder reactions with neutral electron demand between 1,3-dienes with alkynes can be controlled by simple cobalt diimine complexes so that the meta-substituted cycloadducts are generated in good yields and excellent regioselectivity (see scheme; DDQ=2,3-dichloro-5,6-dicyano-1,4- benzoquinone).
Hilt, Gerhard,Janikowski, Judith,Hess, Wilfried
p. 5204 - 5206
(2007/10/03)

Liquid-Phase Catalytic Oxidation of 2,4-Dimethylbiphenyl
2,4-Dimethylbiphenyl synthesized by alkylalion of m-xylene with cyclohexanol and subsequent dehydrogenation was oxidized catalytically in the liquid phase to 2,4-biphenyldicarboxylic acid. The effects of temperature, the catalyst, and initial concentrations of reactants on the rate and efficiency of the process were studied.
Koshel',Lebedeva,Rudkovskii,Krestinina,Koshel',Danilova
p. 55 - 59
(2007/10/03)

Aromatic hydrocarbons in the gaseous and condensed phase. A nuclear decay study
A nuclear technique based on the spontaneous decay of tritiated precursors has been used in a comparative stydy of aromatic phenylation by free phenylinium ions, both in the gas and liquid phase.The mechanism of the major competitive processes promoted by phenylinium ion attack, are discussed.
Angelini, Giancarlo,Keheyan, Yeghis,Speranza, Maurizio
p. 367 - 370
(2007/10/02)