Fe₃O₄@PEG-SO₃H rod-like morphology along with the spherical nanoparticles: novel green nanocomposite design, preparation, characterization and catalytic application

Abstract

A new heterogeneous nanocatalyst was successfully synthesized, completely characterized and efficiently applied in the synthesis of dihydropyrimidines.

Design and development of a novel magnetic camphor nanospheres core/shell nanostructure

“…Fe 3 O 4 /camphor nanospheres employing coprecipitation in situ method has been prepared in accordance with the following conditions [26]. In a typical procedure, 2.4 g of FeCl 3 and 3 g of FeCl 2 Á5H 2 O were dissolved in 100 mL of deionized water.…”

“…In continuation of our research on green nanocatalysts and organic synthesis [21][22][23][24][25][26][27][28], herein, we wish to report Fe 3 O 4 /camphor nanospheres as a novel, efficient, ecofriendly, superparamagnetic and heterogeneous catalyst and investigation of its application in the synthesis of bamino carbonyl compounds 4 via the condensation reaction of aniline 1, an aldehyde 2 and a ketone 3 (Scheme 1).…”

Sonochemical synthesis of chromenes catalyzed by L-phenyl alanine-attached nano-Fe3O4@SiO2

“…The core/shell Fe 3 O 4 nanoparticles can be recycled from the medium of reaction by external magnetic field (13,14). The surface of MNPs can be functionalized simply through suitable surface modifications to provide the attachment of a variety of favorable functionalities (15)(16)(17)(18)(19)(20)(21)(22)(23)(24). Therefor the modified magnetic nanoparticles with all these features are used for varied organic reactions under ultrasonic irradiations (25,26).…”

<strong>L-Proline-functionalized magnetic nanocomposite: a green magnetic nanocatalyst for efficient synthesis of imidazo[1,2-<em>a</em>]pyridines</strong>

“…In continuation of our research [11][12][13][14][15][16][17][18] , herein, an efficient and selective synthesis of 3-amino imidazo[1,2-a]pyridine derivatives were carried out using aromatic aldehydes, 2-aminopyridines and trimethylsilyl cyanide (TMSCN) in the presence of a catalytic amount of L-prolinefunctionalized magnetic nanocatalyst (Fe3O4@L-proline) in ethanol at room temperature in high yields (Scheme 1). The solid nanocatalyst can be recovered easily and reused without any significant loss of the catalytic activity.…”