4350-51-0Relevant articles and documents
Nickel-Catalyzed Reductive 2-Pyridination of Aryl Iodides with Difluoromethyl 2-Pyridyl Sulfone
Miao, Wenjun,Ni, Chuanfa,Xiao, Pan,Jia, Rulong,Zhang, Wei,Hu, Jinbo
supporting information, p. 711 - 715 (2021/01/26)
A novel nickel-catalyzed reductive cross-coupling between aryl iodides and difluoromethyl 2-pyridyl sulfone (2-PySO2CF2H) enables C(sp2)-C(sp2) bond formation through selective C(sp2)-S bond cleavage, which demonstrates the new reactivity of 2-PySO2CF2H reagent. This method employs readily available nickel catalyst and sulfones as cross-electrophile coupling partners, providing facile access to biaryls under mild reaction conditions without pregeneration of arylmetal reagents.
Preparation method of meta-position cyano-aromatic compound
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, (2020/02/17)
The invention provides a preparation method of a meta-position cyano-aromatic compound. The meta-position cyano-aromatic compound is obtained by performing reaction on a meta-position formyl-aromaticcompound serving as a raw material and ammonium acetate. The preparation method comprises the following steps: directly adding the meta-position formyl-aromatic compound, the ammonium acetate, iodine,tert-butanol hydrogen peroxide, sodium carbonate and ethanol into a reaction device, stirring and heating to 45 to 55 DEG C, performing reaction for 7 to 9 hours and separating products to obtain themeta-position cyano-aromatic compound. Through the reaction, the meta-position cyano-aromatic compound can be obtained conveniently and rapidly.
Novel bis- and tris-cyclometalated iridium(III) complexes bearing a benzoyl group on each fluorinated 2-phenylpyridinate ligand aimed at development of blue phosphorescent materials for OLED
Okamura, Naoki,Nakamura, Taiyo,Yagi, Shigeyuki,Maeda, Takeshi,Nakazumi, Hiroyuki,Fujiwara, Hideki,Koseki, Shiro
, p. 51435 - 51445 (2016/06/09)
Novel bis- and tris-cyclometalated iridium(iii) complexes bearing a benzoyl group on each fluorinated 2-phenylpyridinate ligand were developed, aimed at the development of blue phosphorescent materials for organic light-emitting diodes (OLED). When acetylacetonate (acac) was employed as an ancillary ligand, the emission wavelength (λPL) of the 5′-benzoylated bis-cyclometalated complex was blue-shifted up to 479 nm (in dichloromethane at rt, emitting bluish green) in combination with fluorine substituents. Ancillary ligand replacement in the 2-(5-benzoyl-4,6-difluorophenyl)pyridinate-based bis-cyclometalated complex from acac to picolinate gave rise to a further blue shift of λPL to 464 nm, and sky-blue emission was observed. The 2-(5-benzoyl-4,6-difluorophenyl)pyridinate-based homoleptic tris-cyclometalated complex exhibited a more blue-shifted λPL at 463 nm than any other bis- and tris-cyclometalated complexes developed here, emitting sky blue with a photoluminescence quantum yield of 0.90 (in dichloromethane at rt). Using this sky-blue phosphorescent tris-cyclometalated complex as an emitting dopant, a poly(9-vinylcarbazole)-based OLED was fabricated, and excellent blue emission with a Commission Internationale de L'éclairage (CIE) chromaticity coordinate of (0.16, 0.28) was observed, where an external quantum efficiency (ηext) of 1.81% was obtained. The OLED performance was drastically improved by using a solution-processed double-emitting layer device structure, and ηexts of 8.55 and 7.46% were achieved for the present sky-blue phosphorescent bis- and tris-cyclometalated iridium(iii) complexes, respectively (CIE chromaticity coordinates: (0.17, 0.33) and (0.17, 0.29), respectively).
