A process for preparing lacidipine, comprising reacting a t-butoxy carbonyl methyl aryl phosphonium halide with o-phthalaldehyde, and further reacting a product comprising (E)-3-(2-formylphenyl)-2-propenoic acid, 1,1-dimethyl ethyl ester, without isolation, with ethyl-3-amino crotonate.
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 -
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.
A novel bisoxazoline/Pd composite microsphere: a highly active catalyst for Heck reactions
作者:Junke Wang、Yingxiao Zong、Guoren Yue、Yulai Hu、Xicun Wang
DOI:10.1039/c5ra16510e
日期:——
A novel bisoxazoline/Pd microsphere catalyst was successfully prepared. The structure of the solid catalyst was characterized by SEM, TGA and FT-IR. The catalyst exhibits excellent activity for the Heckreaction. Moreover, the catalyst shows outstanding stability and reusability, can be recovered simply and effectively and reused six times without any activity decrease.
emission spectroscopy (ICP-AES) and thermo gravimetric analysis (TGA). The catalyst has been successfully employed in Suzuki-Miyaura as well as Mizoroki–Heckcross-couplingreactions. The reactions proceed smoothly resulting in the high yields of cross-coupling products (81 to 95%) within short reaction times. The catalyst can be efficiently recovered by simple filtration and reused for multiple cycles
在本工作中,一种新型,高效,可回收的有机-无机杂化多相催化剂(Pd(II)-AMP-Cell @ Al 2 O 3通过将2-氨基吡啶共价接枝在氯丙基改性的纤维素-氧化铝复合材料上,然后与乙酸钯络合来制备)。通过扫描电子显微镜(SEM),透射电子显微镜(TEM),能量色散X射线光谱(EDX),X射线衍射(XRD),电感耦合等离子体原子发射光谱(ICP- AES)和热重分析(TGA)。该催化剂已成功用于Suzuki-Miyaura以及Mizoroki-Heck交叉偶联反应。反应平稳进行,从而在较短的反应时间内获得了高产率的交叉偶联产物(81%至95%)。可以通过简单的过滤有效地回收催化剂,并将其重复使用多次,而不会显着降低催化活性。