174018-64-5Relevant academic research and scientific papers
Characterization of a Longicyclic (2,2,2,2) Conjugated ? System in 1,4-Difluorobenzene-Naphthalene Biplanemer
Okamoto, Hideki,Satake, Kyosuke,Kimura, Masaru
, p. 3557 - 3562 (1995)
The electronic absorption of a 1,4-difluorobenzene-naphthalene biplanemer 1 exhibited a characteristic absorption band around 290 nm.This was attributable to intramolecular charge transfer interaction between the longicyclic conjugated ? system and the benzene chromophore.The oxidation potential of 1 was 1.70 V (vs.Ag/AgCl), which was lower than those of the related compounds in which one of the double bonds of 1 was hydrogenated.Thermally, the biplanemer 1 underwent facile Cope rearrangement, followed by dehydrofluorination, to give 1-(4-fluorophenyl)naphthalene and 2-(3-fluorophenyl)naphthalene.
Aminomethylpyridinequinones as new ligands for PEPPSI-type complexes
Gajda, Roman,Poater, Albert,Brotons-Rufes, Artur,Planer, Sebastian,Wo?niak, Krzysztof,Grela, Karol,Kajetanowicz, Anna
, p. 138 - 156 (2021/03/22)
A set of six new catalysts possessing quinone moieties in a pyridine ligand was synthesized and fully characterized by standard analytical techniques, including X-Ray crystallography. The results obtained in Suzuki and Mizoroki–Heck cross-coupling reactions catalyzed by quinone-based compounds were comparable to these obtained in the presence of the original PEPPSI complex designed by Organ. DFT calculations allow to see the structural and electronic factors to describe their similarity. On the other hand, steric maps and NCI plots were the tools to have a more global view of the systems studied, leaving the sphere of reactivity around the metal.
Synthesis of Biaryls via Decarbonylative Nickel-Catalyzed Suzuki-Miyaura Cross-Coupling of Aryl Anhydrides
Zhou, Jing-Ya,Liu, Rui-Qing,Wang, Cheng-Yi,Zhu, Yong-Ming
, p. 14149 - 14157 (2020/11/13)
Transition metal-catalyzed cross-couplings have been widely employed in the synthesis of many important molecules in synthetic chemistry for the construction of diverse C-C bonds. Conventional cross-coupling reactions require active electrophilic coupling partners, such as organohalides or sulfonates, which are not environmentally friendly enough. Herein, we disclose the first nickel-catalyzed Suzuki-Miyaura cross-coupling of aryl anhydrides and arylboronic acids for the synthesis of biaryls in a decarbonylation manner. The reaction tolerates a wide range of electron-withdrawing, electron-neutral, and electron-donating substituents in this process.
Nickel-Catalyzed Kumada Coupling of Boc-Activated Aromatic Amines via Nondirected Selective Aryl C-N Bond Cleavage
Zhang, Zheng-Bing,Ji, Chong-Lei,Yang, Ce,Chen, Jie,Hong, Xin,Xia, Ji-Bao
supporting information, p. 1226 - 1231 (2019/02/14)
A nickel-catalyzed Kumada coupling of aniline derivatives was developed by selective cleavage of aryl C-N bonds under mild reaction conditions. Without preinstallation of an ortho directing group on anilines, the cross-coupling reactions of Boc-protected aromatic amines with aryl Grignard reagents afforded unsymmetric biaryls. Mechanistic studies by DFT calculations revealed that the nickel-mediated C-N bond cleavage is the rate-limiting step.
Cross-coupling of aryl/alkenyl pivalates with organozinc reagents through nickel-catalyzed C-O bond activation under mild reaction conditions
Li, Bi-Jie,Li, Yi-Zhou,Lu, Xing-Yu,Liu, Jia,Guan, Bing-Tao,Shi, Zhang-Jie
supporting information; experimental part, p. 10124 - 10127 (2009/05/30)
Finding the right partner: The catalyst system [NiCl2(PCy 3)2] mediates the title transformation with high efficiency and allows aryl-aryl and vinyl-aryl coupling to proceed. The first example of catalytic cross-coupling u
NAPHTHALENE COMPOUND WITH TERMINAL HYDROGEN, LIQUID CRYSTAL COMPOSITION INCLUDING THE COMPOUND, AND LCD DEVICE INCLUDING THE LIQUID CRYSTAL COMPOSITION
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Page/Page column 34, (2010/11/26)
A liquid crystal (LC) compound having generally required physical properties, low viscosity, proper optical anisotropy, proper dielectric anisotropy and good compatibility with other LC compounds is described. An LC composition including the compound and
