13210-15-6Relevant articles and documents
Use of pyridine as cocatalyst for the synthesis of 2-carboxy substituted diphenylethers by Ullmann-Goldberg condensation
Pellon,Carrasco,Milian,Rodes
, p. 1077 - 1083 (1995)
The synthesis of 2-carboxy-diphenylethers from o-chloro-benzoic acid and phenols is reported using water as solvent and copper, cuprous iodide and pyridine as catalysts.
Microwave-assisted synthesis of xanthones promoted by ytterbium triflate
Genovese, Salvatore,Fiorito, Serena,Specchiulli, Maria Carmela,Taddeo, Vito Alessandro,Epifano, Francesco
, p. 847 - 850 (2015)
Xanthones represent a class of naturally occurring compounds with valuable and promising reported pharmacological activities. One of the main disadvantages in the use of such products is related to the difficulties in their chemical synthesis. In this Letter a new and improved method for the chemical synthesis of xanthones is described. The title compounds have been synthesized in good yields under microwave irradiation from substituted 2-hydroxybenzoic acids and phenols in the presence of Yb(OTf)3 hydrate as the catalyst.
Visible-Light-Induced Aerobic Oxidation of Benzylic C(sp 3)-H of Alkylarenes Promoted by DDQ, tert -Butyl Nitrite, and Acetic Acid
Pan, Decheng,Wang, Yiqing,Li, Meichao,Hu, Xinquan,Sun, Nan,Jin, Liqun,Hu, Baoxiang,Shen, Zhenlu
, p. 218 - 224 (2019)
A visible-light photocatalytic aerobic oxidation of benzylic C(sp 3)-H bonds proceeded in the presence of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, tert -butyl nitrite, and acetic acid. Advantages of this aerobic oxidation method include its relatively mild conditions, the use of visible-light irradiation instead of conventional thermal methods, the use of a low catalyst loading, and the ability to oxidize a range of alkylarenes, including xanthenes, thioxanthenes, and 9,10-dihydroacridines, to the corresponding ketones in excellent yields.
Synthesis of xanthones through the palladium-catalyzed carbonylation/C-H activation sequence
Xu, Yingmeng,Zhou, Jing,Zhang, Congcong,Chen, Ke,Zhang, Tao,Du, Zhenting
, p. 6432 - 6434 (2014)
A series of xanthones with the dibenzo-γ-pyrone framework were synthesized through the palladium-catalyzed carbonylation/C-H activation sequence from the ortho diazonium salts of diaryl ethers in moderate to excellent yields. After screening the reaction condition, the optimal condition was 5 mol % tetrakis (triphenylphosphine) palladium (0) as the catalyst, potassium carbonate as the base, and toluene as the solvent in the presence of catalytic amount of tetrabutyl ammonium bromide under carbon monoxide atmosphere.
COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF
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, (2021/05/21)
The present invention provides a novel compound that can improve the luminous efficiency, stability and life span of the element, an organic electronic element using the same, and an electronic device thereof.
Ultraviolet-light-induced aerobic oxidation of benzylic C(sp3)-H of alkylarenes under catalyst- and additive-free conditions
Zhou, Jiacheng,Li, Meichao,Li, Tianci,Li, Chunmei,Hu, Xinquan,Jin, Liqun,Sun, Nan,Hu, Baoxiang,Shen, Zhenlu
, (2021/02/01)
A mild and efficient system has been discovered for the synthesis of α-aryl carbonyl compounds via oxidation of benzylic C–H to C[dbnd]O bonds. This ultraviolet-light-mediated oxygenation reaction exhibited excellent substrate scope including various xanthenes, thioxanthenes and 9, 10-dihydroacridines and afforded the corresponding ketones with good to excellent yields under catalyst- and additive-free conditions at room temperature.