959246-70-9Relevant academic research and scientific papers
Method for preparing alcohol and phenol through aerobic hydroxylation reaction of boric acid derivative in absence of photocatalyst
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Paragraph 0025-0028; 0030-0032, (2020/01/25)
The invention discloses a method for preparing alcohol and phenol through aerobic hydroxylation reaction of a boric acid derivative in the absence of a photocatalyst, wherein the boric acid derivativeis aryl boronic acid or alkyl boronic acid, and the corresponding target compounds are respectively a phenol-based compound and an alcohol-based compound. According to the method, by using a boric acid derivative as a reaction substrate, an additive is added under a solvent condition, and a hydroxylation reaction is performed under aerobic and illumination conditions to obtain a corresponding target compound. According to the invention, the new strategy is provided for the synthesis of phenols through aerobic hydroxylation of aryl boronic acid without a photocatalyst; the catalyst-free aerobic hydroxylation method for photocatalysis of aryl boronic acid or alkyl boronic acid by using triethylamine as an additive is firstly disclosed; and the new method has advantages of photocatalyst-freecondition, wide substrate range and good functional group compatibility.
COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME
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Paragraph 0240-0241; 0246-0247, (2020/12/25)
The present specification provides a compound and an organic light emitting device including the same.
Spirooxazine photochromic compound and preparation method thereof
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Paragraph 0016, (2020/06/17)
The invention discloses a spirooxazine photochromic compound and a preparation method thereof, and belongs to the technical field of organic functional materials. The molecular structure is disclosedin the invention, whereinR1 and R2 are hydrogen, C1-C6 alkyl (CH2, m = 1, 2, 3, 4, 5, 6), and benzyl; R3and R4 are hydrogen, halogen, C1-C6 alkyl (CH2, m = 1, 2, 3, 4, 5, 6). Accordingto the invention, a photothermal stable fluorene phenol structure is introduced; different groups are used for substitution; the advantages of a novel photochromic material with spirooxazine are provided; the light response speed is high; meanwhile, color fading is rapid, moreover, the photo-thermal stability is good, an open-loop state and a closed-loop state can stably exist for a long time; guidance is provided for solving the problem that the ring-opening state ofspirooxazine photochromic compounds is unstable; the photochromic compound with various color changes from colorless to red, yellow, green, blue or purple is realized, the color variety of color change is richer, the market diversification requirements are finally met, the synthesis raw materials are cheap and easily available, and the synthesis process is easy to realize industrialization.
Facile synthesis and characterization of indene-fused 4-methylcoumarins and an unexpected skeletal rearrangement via Pechmann condensation
Wu, Jie,Liu, Wei,Liang, Li,Gan, Ya,Xia, Shuang,Gou, Xiaojun,Sun, Xiaohua
supporting information, (2020/04/15)
The Pechmann condensation of phenolic fluorenes with ethyl acetoacetate afforded indene-fused 4-methylcoumarins. In addition to the expected indeno[1,2-g]coumarin, a skeletal rearranged compound was obtained as a concomitant product when 9,9-dimethyl-9H-fluorene-2,7-diol was utilized as the substrate. X-ray crystallography was used to identify the structures of the isomers. Photochemical and photophysical studies indicated that compared with the non-rearranged products, the skeletal rearranged isomers have red shifted absorption maxima and much higher fluorescence quantum yields. A mechanism involving two competitive pathways for the simultaneous production of isomers was proposed.
Photoinduced hydroxylation of arylboronic acids with molecular oxygen under photocatalyst-free conditions
Xu, Yu-Ting,Li, Chen-Yuan,Huang, Xiao-Bo,Gao, Wen-Xia,Zhou, Yun-Bing,Liu, Miao-Chang,Wu, Hua-Yue
supporting information, p. 4971 - 4975 (2019/09/30)
Photoinduced hydroxylation of boronic acids with molecular oxygen under photocatalyst-free conditions is reported, providing a green entry to a variety of phenols and aliphatic alcohols in a highly concise fashion. This new protocol features photocatalyst-free conditions, wide substrate scope and excellent functional group compatibility.
HETERO-CYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME
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Paragraph 0192, (2017/10/26)
The present specification relates to a hetero ring compound, and to an organic light-emitting device including the same. The organic light-emitting device comprises: a first electrode; a second electrode disposed to face the first electrode; and an organi
Gold-catalyzed oxidative coupling of arylsilanes and arenes: Origin of selectivity and improved precatalyst
Ball, Liam T.,Lloyd-Jones, Guy C.,Russell, Christopher A.
supporting information, p. 254 - 264 (2014/01/23)
The mechanism of gold-catalyzed coupling of arenes with aryltrimethylsilanes has been investigated, employing an improved precatalyst (thtAuBr3) to facilitate kinetic analysis. In combination with linear free-energy relationships, kinetic isotope effects, and stoichiometric experiments, the data support a mechanism involving an Au(I)/Au(III) redox cycle in which sequential electrophilic aromatic substitution of the arylsilane and the arene by Au(III) precedes product-forming reductive elimination and subsequent cycle-closing reoxidation of the metal. Despite the fundamental mechanistic similarities between the two auration events, high selectivity is observed for heterocoupling (C-Si then C-H auration) over homocoupling of either the arylsilane or the arene (C-Si then C-Si, or C-H then C-H auration); this chemoselectivity originates from differences in the product-determining elementary steps of each electrophilic substitution. The turnover-limiting step of the reaction involves associative substitution en route to an arene π-complex. The ramifications of this insight for implementation of the methodology are discussed.
