Palladium/Imidazolium salt as a versatile catalyst for sequential coupling reactions of aryl dihalides to unsymmetrically substituted arenes
摘要:
A simple method for one-pot sequential Heck/Suzuki Coupling reactions of a range of substituted aryl dihalides has been described The Pd(OAc)(2)/imidazolium system catalyzed double coupling reactions proceed Without isolation of the intermediates giving unsymmetrically polysubstituted biphenyls ill good to excel lent yields Further couplings of the resultant products bearing additional C-Cl bonds with substituted arylboronic acids or amines lead to unsymmetrical terphenyls and aminobiphenyl derivatives (C) 2009 Elsevier Ltd All rights reserved
Rhodium(II)-Catalyzed Nondirected Oxidative Alkenylation of Arenes: Arene Loading at One Equivalent
作者:Harit U. Vora、Anthony P. Silvestri、Casper J. Engelin、Jin-Quan Yu
DOI:10.1002/anie.201310539
日期:2014.3.3
bimetallic RhII catalyst promoted the CH alkenylation of simple arenes at 1.0 equivalent without the use of a directing group. A phosphine ligand as well as cooperative reoxidation of RhII with Cu(TFA)2 and V2O5 proved essential in providing monoalkenylated products in good yields and selectivities, especially with di‐ and trisubstituted arenes.
双金属的Rh II催化剂促进与c H在1.0当量,而无需使用定向基团的简单的芳烃的烯基化。膦配体以及Rh II与Cu(TFA)2和V 2 O 5的协同再氧化被证明对于以高收率和选择性提供单烯基化产物至关重要,特别是对于二取代和三取代的芳烃。
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
2-Hydroxy-1,10-phenanthroline vs 1,10-Phenanthroline: Significant Ligand Acceleration Effects in the Palladium-Catalyzed Oxidative Heck Reaction of Arenes
作者:Cheng-Hao Ying、Shao-Bai Yan、Wei-Liang Duan
DOI:10.1021/ol4033804
日期:2014.1.17
A series of bidentate monoanionic nitrogen ligands were designed and applied in the Pd-catalyzed oxidative Heck reaction of arenes with alkenes. Significant ligand-accelerated effects were observed, and direct C-H functionalized products were formed in high yields with meta-selectivity.