Direct Oxidative Coupling of Arenes with Olefins by Rh-Catalyzed CH Activation in Air: Observation of a Strong Cooperation of the Acid
作者:Lu Zheng、Jianhui Wang
DOI:10.1002/chem.201200657
日期:2012.7.27
developed for the oxidativecoupling of non‐chelate‐assisted arenes with olefins in the presence of catalytic amounts of Cu(OAc)2⋅H2O as a co‐oxidant and oxygen as the terminal oxidant. The acid was an indispensable component in this system and played a very important role in the coupling reaction. This catalytic system was applied to the direct oxidativecoupling of a series of arenes and olefins and the corresponding
A [的RhCl(COD)} 2 ] /四氯化碳3 COOH系统用于非螯合辅助芳烃的氧化偶联在催化量的Cu的存在开发与烯烃(OAC)2 ⋅ ħ 2 O作为助氧化剂和氧气作为终端氧化剂。酸是该体系中必不可少的组分,并且在偶联反应中起着非常重要的作用。该催化体系用于一系列芳烃和烯烃的直接氧化偶联,相应的产物以高收率提供,具有特殊的化学和区域选择性。该反应为乙烯基芳烃提供了一种原子高效的途径,乙烯基芳烃广泛用于各种精细化学品中。
Pd-catalyzed ligand-free desulfitative Heck reaction with arenesulfinic acid salts under air
作者:Sai Hu、Ping Xia、Kai Cheng、Chenze Qi
DOI:10.1002/aoc.2970
日期:2013.3
Palladium‐catalyzed cross‐coupling reactions of various aryl sulfinic acidsalts with a wide variety of vinyl substrates have been achieved in good to excellent yields under simple aerobic conditions at 70°C with the assistance of Cu(II) salts. The reaction can be accelerated by the combination of DMSO with THF. The reported Matsuda–Heck type coupling reactions are tolerant to the common functional
Ruthenium Complex-Catalysed Heck Reactions of Areneboronic Acids; Mechanism, Synthesis and Halide Tolerance
作者:Edward?J. Farrington、Christopher?F.?J. Barnard、Elizabeth Rowsell、John?M. Brown
DOI:10.1002/adsc.200404231
日期:2005.1
Ruthenium-arene complexes can act as efficient catalysts for the coupling of areneboronicacids with electrophilic alkenes. The chemoselectivity is completely different from palladium coupling, with full tolerance for halogen in the arene. NMR and ES-MS studies have been carried out to elucidate the reaction pathway
with a lower critical solution temperature (LCST) in water. Pdnanoparticles were immobilized on these poly(NIPAM-co-4-VP) hydrogels. The heterogeneous Pdcatalyst showed high catalytic activities for carbon–carbon couplingreactions, such as Suzuki–Miyaura, Heck–Mizoroki, and Sonogashira couplingreactions in water. The Pdcatalystimmobilized on poly(NIPAM-co-4-VP) hydrogel (NIPAM:4-VP = 1:1 M ratio)
Highly Efficient, Recyclable Pd(II) Catalysts with Bisimidazole Ligands for the Heck Reaction in Ionic Liquids
作者:Soon Bong Park、Howard Alper
DOI:10.1021/ol030071d
日期:2003.9.1
[reaction: see text] New Pd(II) complexes with bisimidazole ligands were prepared and proved to be effective catalysts for the Heckreaction under phosphine-free conditions using ionicliquids as solvents. This system could be recycled five times without any loss of catalytic activity.