Facile Preparation of Ionic Liquid Functionalized Magnetic Nano-Solid Acid Catalysts for Acetalization Reaction

Abstract

The facile two-step preparation procedure of a novel magnetic nano-solid acid catalyst is described, which includes grafting an ionic liquid onto Fe 3 O 4 nanoparticles, followed by the sulfonation of phenyl groups in the ionic liquid. The catalytic performance of this novel material has been systematically studied in the acetal formation of benzaldehyde and ethylene glycol. The experimental results testify this catalyst possesses high catalytic activity with a yield of 97% under mild reaction conditions. Furthermore, the catalyst is readily separated using a permanent magnet and it is reusable without any significant decrease in catalytic activity.

Synthesis and Characterization of Fe3O4@SiO2 NPs as an Effective Catalyst for the Synthesis of Tetrahydrobenzo[a]xanthen-11-ones

“…6,7 Recently, functionalized magnetite nanoparticles were used as efficient catalytic systems in many chemical transformations including synthesis of α-amino nitriles, 8 1,1-diacetates from aldehydes, 9 diazepine derivatives, 10 indazolo[2,1-b]phthalazine-triones and pyrazolo [1,2-b]phthalazine-diones, 11 3,4-dihydropyrimidin-2(1H)-ones, 12 2-amino-4H-chromen-4-yl phosphonates, 13 1,4-dihydropyridines 14 and pyrrole synthesis. 15 In addition, a series of organic reactions such as Knoevenagel condensation/Michael addition, 16 Suzuki/Heck cross-coupling, 17 asymmetric aldol reaction, 18 Suzuki coupling, 19 asymmetric hydrogenation of aromatic ketones, 20 acetalization reaction, 21 Ritter reaction, 22 23 Henry reaction, 24 enantioselective directaddition of terminal alkynes to imines 25 have been done using functionalized nanostructures.…”

Functionalized superparamagnetic Fe3O4 as an efficient quasi-homogeneous catalyst for multi-component reactions

“…65-3107). 33 The mean crystallite size and the mean particle size were determined using the Scherrer formula and found to be 11.6 nm.…”

Hyperactive Magnetically Separable Nano-sized MgFe2O4 Catalyst for the Synthesis of Several Five- and Six-Membered Heterocycles

“…Recently functionalized magnetic nano particle have been used as efficient catalytic system in many chemical transformation including synthesis of α-amino nitriles [10], 1-1 diacetates form aldehyde [11], diazepiene derivatives [12], indazalo [2,1-b] phthalazine triones, pyrazoles [1,2-b] phthalazine-diones [13], 3,4 dihydro pyrimidines-2(1H)ones [14], 1,4 dihydropyrimidines [15], and pyrrole synthesis [16]. Also a series of organic reaction such as Michael addition [17], Suzuki/Heck cross-coupling [18], asymmetric aldol reaction [19], Suzuki coupling [20], acetalization reaction [21], Ritter reaction [22], cyanosilylation of carbonyl compounds [23], Henry reaction [24], enantioselective direct addition of terminal alkynes to imines [25] have been done using functionalized nanostructure.…”