Abstract
Herein, a volcanic-based mesoporous catalytic system is precisely characterized by various analytical methods and suitably used for facilitating the organic synthesis reactions. Briefly, high reaction yield (99%) has been obtained in short reaction times (4 min) in the synthesis reactions of chromene pharmaceutical derivatives, through applying this highly efficient organometallic catalyst. From mechanistic aspect, effective electronic interactions between heteroatoms like oxygen with the surface of pumice microparticles provide a suitable condition for covalent bindings. As the main advantages of the volcanic pumice, high catalytic performance after activation of the chemical functional groups via acid treatment, magnetic property, and completely natural basis (biocompatibility and biodegradability) could be referred. Highly porous structure leads reactants to be entrapped in the tiny pores and activated for covalent binding. Moreover, significant convenience in the separation of the particles and great reusability could be mentioned as additional excellences for this catalyst.
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