Synthesis of Novel Nanomagnetic Catalyst with Acetic Acid Tags: Application in the Synthesis of New Amidoalkyl Phenols under Solvent‐Free Condition

Abstract

In this paper, [Fe3O4@SiO2@(CH2)3‐im‐CH2CO2H]Br was designed, synthesized and fully characterized by different techniques such as Fourier transform spectroscopy infrared (FT‐IR), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDX), elemental mapping, transmission electron microscopy (TEM), vibrating sample magnetometer (VSM) and thermal gravimetric analysis (TG). It was used as an efficient acidic nanomagnetic catalyst in the preparation of amidoalkyl phenols via multi‐component condensation of various amides (benzamide, acetamide and urea), phenolic compounds and aryl aldehydes or isatin under solvent‐free condition. High yield of products, easy work‐up and reusability of the catalyst can be mentioned as the advantages of described work.

A Convenient Catalytic Method for the Synthesis of Pyridines with Henna and Pyrazole Moieties using Cooperative Vinylogous Anomeric‐Based Oxidation

“…The peak, which is observed at 587 cm À 1 , is related to the FeÀ O bonds in the structure of magnetic nanoparticles. [51] The peak related to the bend nanoparticles mode of CH 2 in the structure of DABCO appeared in 1462 cm À 1 . The sharp and broad peak at 1102 cm À 1 is corresponded to SiÀ OÀ Si bonds stretching in the structure of silica.…”

“…The sharp and broad peak at 1102 cm À 1 is corresponded to SiÀ OÀ Si bonds stretching in the structure of silica. [51] Another peak, which is appeared at 2173 cm À 1 , is related to the CN functional group. In addition, the peak that appeared at 3411 cm À 1 is related to À OH groups attached to the surface of Fe (f).…”

Designing CoFe2O4/Cellulose@L‐aspargine‐Co Nanocomposite: An Ultra‐Efficient Recyclable Catalyst in the Quick Reduction of Nitro Compounds under Eco‐Friendly Conditions

“…To control these problems, nano catalysts can be used as effective bridge between heterogeneous and homogeneous catalysts [5–7] . Currently, magnetic nanoparticles (MNPs) are regarded as favorite supports to heterogenize the homogeneous catalysts owing to their unique properties [8–10] . Besides, cellulose as an inexhaustible organic polymer with interesting texture has attracted the consideration of researchers [11–13] .…”