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。
Synthesis of new surfactant-like triazine-functionalized ligands for Pd-catalyzed Heck and Sonogashira reactions in water
作者:Nasser Iranpoor、Sajjad Rahimi、Farhad Panahi
DOI:10.1039/c5ra06753g
日期:——
efficient catalytic species for C–C bond formation reactions in neat water. Under these conditions, Pd-catalyzed Heck and Sonogashira reactions are accomplished without the need for phosphineligand. The generation of emulsion droplets (5–10 μm) containing Pd(0) nanoparticles would function as an effective reactor to accelerate the rate of the reaction in water media.
Magnetically recoverable nanostructured Pd complex of dendrimeric type ligand on the MCM-41: Preparation, characterization and catalytic activity in the Heck reaction
Abstract A palladiumcomplex of a dendrimer type ligand of aminoethylacrylamide immobilized onto the mesoporous channels of MCM-41 with magnetic core was prepared and characterized using various techniques such as XRD, TEM, BET, FT-IR, TGA, and VSM. The prepared nanostructured material was found as a magnetically recoverable catalyst for Heck reaction of aryl halides and vinylic C–H. The catalyst is easily
Homogeneous palladium-catalysed arylation of activated alkenes with aryl chlorides
作者:Alwyn Spencer
DOI:10.1016/0022-328x(84)80340-x
日期:1984.7
A study has been made of arylation of activated alkenes with aryl chlorides homogeneously catalysed by palladium acetate in the presence of triphenylphosphine or tri-p-tolylphosphine. Electron-withdrawing substituents in the aryl chloride favour the reaction. Only moderate yields could be obtained, and the maximum turnover number was 51, mainly because of precipitation of palladium metal. The probable
Process for the Pd-catalyzed arylation of olefins with aryl halides
申请人:Ciba-Geigy Corporation
公开号:US04564479A1
公开(公告)日:1986-01-14
Compounds of the formula I ##STR1## in which A is C.sub.2-12 -alkenyl, C.sub.4-8 -cycloalkenyl or a grouping--C(R).dbd.C(R')--Y and Y, R, R', R.sub.1, R.sub.2, R.sub.3 and R.sub.3 ' are as defined in patent claim 1, can be prepared in high yields in a simple and economical manner by reacting corresponding bromobenzenes or iodobenzenes with a compound HA in the presence of an alkali metal salt or alkaline earth metal salt of an aliphatic monocarboxylic acid having 1-12 C atoms or benzoic acid, of a cyclic or N,N-disubstituted amide as the solvent, particularly N,N-dimethylformamide, and of a palladium compound which can, if desired, contain arsenic or phosphorus, as the catalyst.