Palladium-catalyzed double arylations of terminal olefins in acetic acid
作者:Daichao Xu、Chunxin Lu、Wanzhi Chen
DOI:10.1016/j.tet.2011.12.017
日期:2012.2
A palladium-catalyzed Heck diarylation of terminalolefins under ligand-free conditions in acetic acid is described. This procedure allows double arylation of terminalolefins affording trisubstituted olefins in good to excellent yields. The methodology is applicable to the coupling of both electron-deficient and electron-rich aryl iodides leading to symmetrical and unsymmetrical β,β-diarylated alkenes
A Simple, Multidimensional Approach to High-Throughput Discovery of Catalytic Reactions
作者:Daniel W. Robbins、John F. Hartwig
DOI:10.1126/science.1207922
日期:2011.9.9
A screening technique based on simple mass spectrometry measurements uncovers catalysts for organic coupling reactions.
一种基于简单质谱测量的筛选技术揭示了有机偶联反应的催化剂。
Metal Triflate-Catalyzed Regio- and Stereoselective Friedel–Crafts Alkenylation of Arenes with Alkynes in an Ionic Liquid: Scope and Mechanism
作者:Mi Young Yoon、Jin Hong Kim、Doo Seoung Choi、Ueon Sang Shin、Jin Yong Lee、Choong Eui Song
DOI:10.1002/adsc.200700039
日期:2007.7.2
In the metaltriflate-catalyzed hydroarylation of alkynes, employing an ionicliquid dramatically enhanced the catalytic activities, resulting in broadening the scope of substrates (arenes and alkynes). In some cases, even reactions that were not possible in conventional organic solvents proceeded smoothly in ionicliquids. Moreover, the ionicliquid phase containing catalyst could be readily recovered
在金属三氟甲磺酸酯催化的炔烃加氢芳基化中,采用离子液体显着增强了催化活性,从而扩大了底物(芳烃和炔烃)的范围。在某些情况下,甚至在常规有机溶剂中不可能发生的反应在离子液体中也能顺利进行。而且,通过在反应后简单地倾析有机层,可以容易地回收含离子液体的催化剂,并且可以将其重新用于随后的运行中而没有任何明显的活性损失。包括反应中间体的13 C NMR分析和同位素实验在内的机理研究首次证实,这种类型的反应是通过乙烯基阳离子中间体进行的。
Controlled mono- and double-Heck reaction catalyzed by a dicarbene dipalladium complex
作者:Yunfei Li、Gang Liu、Changsheng Cao、Shuzhan Wang、Yuling Li、Guangsheng Pang、Yanhui Shi
DOI:10.1016/j.tet.2013.05.030
日期:2013.7
phosphine-free mono- and double-Heck reaction of terminal olefins with electron-deficient and electron-rich aryl halides (iodides and bromides) is described. These reactions are catalyzed by the dicarbenedipalladiumcomplex 1 by controlling the stoichiometry of the aryl halide and the olefine, the loading of the palladium catalyst, as well as using different base, and with or without additive. The procedure
Nickel-Catalyzed Hydroarylation of Alkynes under Reductive Conditions with Aryl Bromides and Water
作者:E. Ryan Barber、Hannah M. Hynds、Claudia P. Stephens、Holli E. Lemons、Emily T. Fredrickson、Dale J. Wilger
DOI:10.1021/acs.joc.9b01556
日期:2019.9.20
coupling reaction utilizes commercially available alkynes and aryl bromides, along with water and Zn. An air-stable and easily synthesized Ni(II) precatalyst is the only entity used in the reaction that is not commercially available. This reductive cross-coupling reaction displays a fairly unusual anti selectivity when aryl bromides with ortho substituents are used. In addition to optimization data