Three cis-chelating di-N-heterocyclic carbene palladium(II) complexes [PdX2(diNHC)] (X = I, 1; X = SCN, 2; X = CF3CO2, 3) bearing different anionic co-ligands were synthesized and fully characterized. A comparison of their catalytic activities in the Mizoroki–Heckreaction and conjugate addition of arylboronic acids to cyclic enones revealed increasing efficiency in the order SCN− < I− < CF3CO2−. The
三顺-chelating二- ñ -杂环卡宾钯(II)配合物[PDX 2(diNHC)](X = I,1 ; X = SCN,2 ; X = CF 3 CO 2,3)带有不同阴离子共配位合成并充分表征。在Mizoroki-Heck反应和共轭加成的芳基硼酸环状烯酮它们的催化活性的比较显示提高效率的顺序SCN -
Methionine-functionalized chitosan-Pd(0) complex: A novel magnetically separable catalyst for Heck reaction of aryl iodides and aryl bromides at room temperature in water as only solvent
作者:Abdol R. Hajipour、Zeinab Tavangar-Rizi
DOI:10.1002/aoc.3638
日期:2017.7
We report a novel catalyst system with an immobilized palladium metal‐containing magnetic nanoparticle core (ImmPd(0)‐MNPs) for the Heckreaction. ImmPd(0)‐MNPs was found to be an exceptionally mild and versatile catalyst for the Heckreaction of aryl iodides and bromides at room temperature. The catalyst was simply recovered using an external magnet from the reaction mixture and recycled six times
Ionic Liquid Immobilized Palladium Nanoparticle - Graphene Hybrid as Active Catalyst for Heck Reaction
作者:Vivek Srivastava
DOI:10.2174/1570178611666141201223344
日期:2015.1.1
We engineered, graphene based Pd -Nano composites (Pd/RGO) and tested them to catalyze the Heck reaction
in [bmim] NTf2 solvent system. High yield, easy product isolation, recycling of the catalytic system and ligand free approach
are the main outcomes of this proposed protocol. The proposed protocol was further exploited for the successful
synthesis of 3-styryl coumarins in good yield.
Practical Photocatalytic Trifluoromethylation and Hydrotrifluoromethylation of Styrenes in Batch and Flow
作者:Natan J. W. Straathof、Sten E. Cramer、Volker Hessel、Timothy Noël
DOI:10.1002/anie.201608297
日期:2016.12.12
represent a challenging class of substrates for current radical trifluoromethylation and hydrotrifluoromethylation methods due to a myriad of potential side reactions. Herein, we describe the development of mild, selective and broadly applicable photocatalytic trifluoromethylation and hydrotrifluoromethylation protocols for these challenging substrates. The methods use fac‐Ir(ppy)3, visible light and