ARTICLE
This journal isGlucosulfonic acid immobilized on Fe 3 O 4 magnetic nanoparticles (GSA@MNPs) as an efficient and magnetically reusable nanocatalyst has been reported for the clean and one-pot synthesis of polyhydroquinoline and 2,3-dihydroquinazolin-4(1H)-one derivatives, with short reaction times in good to high yields in ethanol. After completing reactions the catalyst was easily separated using an external magnetic field from the reaction mixture and reused for several consecutive runs without significant loss of their catalytic efficiency. This new catalyst was characterized by FT-IR spectroscopy, TGA, XRD, VSM, TEM, EDS and SEM.
In this work boehmite nanoparticles (BNPs) were prepared through addition of aqueous solution of NaOH to solution of Al(NO3)3·9H2O. Then, the surface of BNPs was modified by (3-chloropropyl)trimethoxysilane (CPTMS) and further tetradentate ligand (MP-bis(AMP)) was anchored on its surface. At final step, a tetradentate organometallic complex of copper was stabilized on the surface of modified BNPs (Cu(II)-MP-bis(AMP)@boehmite). These obtained nanoparticles were characterized using SEM imaging, WDX, EDS, AAS and TGA analysis, BET method, FT-IR spectroscopy, and XRD pattern. In continue, the catalytic activity of Cu(II)-MP-bis(AMP)@boehmite has been used as a much efficient, reusable and hybrid of organic–inorganic nanocatalyst in the synthesis of ether derivatives through C–O coupling reaction under palladium-free and phosphine-free conditions. Cu(II)-MP-bis(AMP)@boehmite catalyst has been recovered and reused again for several times in the synthesis of ether derivatives.
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