Copper-Mediated Fluorination of Arylboronate Esters. Identification of a Copper(III) Fluoride Complex
摘要:
A method for the direct conversion of arylboronate esters to aryl fluorides under mild conditions with readily available reagents is reported. Tandem reactions have also been developed for the fluorination of arenes and aryl bromides through arylboronate ester intermediates. Mechanistic studies suggest that this fluorination reaction occurs through facile oxidation of Cu(I) to Cu(III), followed by rate-limiting transmetalation of a bound arylboronate to Cu(III). Fast C-F reductive elimination is proposed to occur from an aryl- copper(III)-fluoride complex. Cu(III) intermediates have been generated independently and identified by NMR spectroscopy and ESI-MS.
通过将空穴传输的二苯并呋喃或二苯并噻吩与电子传输的菲并咪唑基团连接起来,合成了两种具有D–π–A结构的蓝色荧光菲并咪唑衍生物(PhImFD和PhImTD)并进行了表征。非平面扭曲结构减少了分子聚集,这赋予了这两种化合物良好的热性能,成膜能力以及在CH 2 Cl 2和固态下的高量子产率。通过使用化合物PhImFD和PhImTD制造非掺杂有机发光二极管(OLED)作为发射器,并表现出令人鼓舞的表现。该设备显示出与委员会国际照明委员会(CIE)深蓝色的发射(0.15,0.11)为坐标PhImFD和(0.15,0.10)为PhImTD。PhImFD和PhImTD具有理想的双极主导特性,使器件的驱动电压低至3.6V。发现材料的能级与具有不同取代基的化合物中的供体单元有关。使用PhImTD作为发射层(EML)的设备B具有良好的能级和增强的电子传输能力,对于CE的效率为1.34 cd m -2,对于CE的效率为0
Engaging Ag(0) single atoms in silver(I) salts-mediated C-B and C-S coupling under visible light irradiation
作者:Enxin Cui、Dan Qiao、Haibin Li、Lirong Guo、Chen-Ho Tung、Yifeng Wang
DOI:10.1016/j.jcat.2021.08.035
日期:2021.10
transmission electron microscope (HAADF AC-STEM) and electron paramagnetic resonance (EPR). The activities of the silver(I) salts were affected by the anions and could be associated with their abilities in formation of AgSAs during the reactions. Kinetic studies showed that the deiodination rate was linearly correlated with the loading of AgSAs, and hence AgSAs were the true catalytic centers for the 1e−-reduction
Metal-Free Cross-Coupling of Arylboronic Acids and Derivatives with DAST-Type Reagents for Direct Access to Diverse Aromatic Sulfinamides and Sulfonamides
作者:Qiang Wang、Xiang-Ying Tang、Min Shi
DOI:10.1002/anie.201605066
日期:2016.8.26
We have developed a simple and convenient method for the cross‐coupling of arylboronicacids and their derivatives with DAST‐type reagents under mild and metal‐freeconditions to directly afford sulfinamides in moderate to good yields. Moreover, sulfonamides were obtained after a simple oxidation reaction. The reaction mechanism was investigated by 18O‐labeling experiments, and the synthetic utility
Trimethylphosphate as a Methylating Agent for Cross Coupling: A Slow-Release Mechanism for the Methylation of Arylboronic Esters
作者:Zhi-Tao He、Haoquan Li、Alexander M. Haydl、Gregory T. Whiteker、John F. Hartwig
DOI:10.1021/jacs.8b10076
日期:2018.12.12
A methyl group on an arene, despite its small size, can have a profound influence on biologically active molecules. Typical methods to form a methylarene involve strong nucleophiles or strong and often toxic electrophiles. We report a strategy for a new, highly efficient, copper and iodide co-catalyzed methylation of aryl- and heteroarylboronic esters with the mild, nontoxic reagent trimethylphosphate
Palladium-Catalyzed Methylation of Aryl, Heteroaryl, and Vinyl Boronate Esters
作者:Alexander M. Haydl、John F. Hartwig
DOI:10.1021/acs.orglett.9b00025
日期:2019.3.1
method for the direct methylation of aryl, heteroaryl, and vinyl boronate esters is reported, involving the reaction of iodomethane with aryl-, heteroaryl-, and vinylboronate esters catalyzed by palladium and PtBu2Me. This transformation occurs with a remarkably broad scope and is suitable for late-stage derivatization of biologically active compounds via the boronate esters. The unique capabilities
COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF
申请人:DUK SAN NEOLUX CO., LTD.
公开号:US20200231581A1
公开(公告)日:2020-07-23
The present invention provides the compound represented by Formula 1, an organic electric element comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, and electronic device thereof, and by comprising the compound represented by Formula 1 in the organic material layer, the driving voltage of the organic electronic device can be lowered, and the luminous efficiency and life time of the organic electronic device can be improved.