使用基于醌的氯腈/ H +试剂作为可循环使用的有机(无金属)氧化剂体系,可以显示出多种芳基胺进行氧化C-C键形成,以提供联苯胺/萘啶。设计了具有各种取代基的芳胺(3°/ 2°)用于理解氧化二聚作用的空间和电子偏好,并提出了涉及胺自由基阳离子的机理。通过氧化CC偶联获得的四苯基联苯胺衍生物已通过简单的化学转化进一步转化为发射蓝色光的空穴传输材料。这项研究强调了以简单,经济和有效的方式准备新型HTM。
An efficient heterogeneous ligand free C–N coupling reaction catalyzed by palladium supported on magnetic nanoparticles
摘要:
The catalytic activity of palladium supported on magnetic nanoparticles in the amination coupling reaction of different nitrogen containing substrates with aryl halides was investigated. C-N bond formation was achieved in moderate to excellent yields and the catalyst could be separated by magnetic decantation. (C) 2015 Elsevier Ltd. All rights reserved.
Air Stable, Sterically Hindered Ferrocenyl Dialkylphosphines for Palladium-Catalyzed C−C, C−N, and C−O Bond-Forming Cross-Couplings
作者:Noriyasu Kataoka、Quinetta Shelby、James P. Stambuli、John F. Hartwig
DOI:10.1021/jo025732j
日期:2002.8.1
aryl halides coupled with acyclic or cyclic secondary alkyl- and arylamines, with primary alkyl- and arylamines, and with aryl- and primary alkylboronicacids. These last couplings provide the first general procedure for reaction of terminal alkylboronicacids with aryl halides without toxic or expensive bases. The ligand not only generates highly active palladium catalysts, but it is air stable in
A New Hybrid Phosphine Ligand for Palladium-Catalyzed Amination of Aryl Halides
作者:Ken Suzuki、Yoji Hori、Tohru Kobayashi
DOI:10.1002/adsc.200700543
日期:2008.3.25
A new hybrid phosphine was designed. The phosphine combines two common structural characteristics found among the effective phosphineligands reported recently, namely, three tert-alkyl substituents binding to the phosphorus and an aryl group at an appropriate position. A hybrid phospine/palladium system is versatile and effective for the coupling reaction of various arylhalides with primary and secondary
Trineopentylphosphine: A Conformationally Flexible Ligand for the Coupling of Sterically Demanding Substrates in the Buchwald–Hartwig Amination and Suzuki–Miyaura Reaction
作者:Steven M. Raders、Jane N. Moore、Jacquelynn K. Parks、Ashley D. Miller、Thomas M. Leißing、Steven P. Kelley、Robin D. Rogers、Kevin H. Shaughnessy
DOI:10.1021/jo400435z
日期:2013.5.17
palladium provides a highly effective catalyst for the Buchwald–Hartwig coupling of sterically demanding aryl bromides and chlorides with stericallyhindered aniline derivatives. Excellent yields are obtained even when both substrates include 2,6-diisopropyl substituents. Notably, the reaction rate is inversely related to the steric demand of the substrates. X-ray crystallographic structures of Pd(TNpP)2,
三叔戊基膦(TNpP)与钯的结合为空间受限的芳族溴化物和氯化物与空间受阻的苯胺衍生物的布赫瓦尔德-哈特维格偶联提供了一种高效的催化剂。即使两个底物都包含2,6-二异丙基取代基,也可获得优异的产率。值得注意的是,反应速率与底物的空间需求成反比。Pd(TNpP)2,[Pd(4- t -Bu-C 6 H 4)(TNpP)(μ-Br)] 2和[Pd(2-Me-C 6 H 4)的X射线晶体结构(TNpP)(μ-Br)] 2被报道。这些结构表明,TNpP配体的构象柔韧性在允许催化剂偶联受阻底物方面起着关键作用。Pd / TNpP系统对受阻芳基溴化物的Suzuki偶联也显示出良好的活性。
An Efficient and General Method for the Heck and Buchwald–Hartwig Coupling Reactions of Aryl Chlorides
作者:Dong-Hwan Lee、Abu Taher、Shahin Hossain、Myung-Jong Jin
DOI:10.1021/ol202177k
日期:2011.10.21
The β-diketiminatophosphane Pd complex acted as a powerful catalyst for the Heck coupling of aryl chlorides with alkenes. Various aryl and heteroaryl chlorides were coupled efficiently under relatively mild conditions. Furthermore, this catalytic system also proved to be highly active in the Buchwald–Hartwig coupling of deactivated and sterically hindered aryl chlorides at room temperature.
Disclosed are electroluminescent devices that comprise organic layers that contain certain organic compounds containing one ore more pyrimidine moieties. The organic compounds containing one ore more pyrimidine moieties are suitable components of blue-emitting, durable, organo-electroluminescent layers. The electroluminescent devices may be employed for full color display panels in for example mobile phones, televisions and personal computer screens.