Abstract
Abstract A palladium complex 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 recoverable with an external magnet and is reusable with different leaching amounts depending to loading of Pd. A hot filtration test was also performed and gave evidence that Palladium in heterogeneous samples can dissolve and then redeposit on the surface of the support material.
Highlights
Palladium catalyzed Heck-type vinylation of aryl halides is one of the most important and versatile tool for carbon-carbon coupling reaction in the field of synthetic organic chemistry including natural products, pharmaceuticals, liquid crystals and heteroarenes (Gruber-Woelfler et al, 2012)
A palladium complex 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 X-ray diffraction (XRD), transmission electron microscopy (TEM), BET, FT-IR, thermogravimetric analysis (TGA), and VSM
Heck reaction is catalyzed by homogeneous palladium phosphine
Summary
Palladium catalyzed Heck-type vinylation of aryl halides is one of the most important and versatile tool for carbon-carbon coupling reaction in the field of synthetic organic chemistry including natural products, pharmaceuticals, liquid crystals and heteroarenes (Gruber-Woelfler et al, 2012). Heck reaction is catalyzed by homogeneous palladium phosphine. Silanol groups on the surface of MCM-41 are useful for immobilization of organic modifiers (Abdollahi-Alibeik and Pouriayevali, 2011). Linkage of modifier with the silanol groups onto the inner surface of hexagonal channels can provide active catalytic sites and hexagonal channels of MCM-41 can act as nanoreactor. A wide variety of transition metal complexes have been anchored on the surface of MCM-41 and have been applied as catalysts in various organic transformations (Chang et al, 2013; Gao et al, 2015)
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