Fe3O4@FSM-16-SO3H as a novel magnetically recoverable nanostructured catalyst: preparation, characterization and catalytic application

Synthesis and characterization of thiophene-derived palladium(ii) complex immobilized on FSM-16 and its application in the novel synthesis of 7-(aryl)-7,12-dihydro-6H-indeno[1,2,4]triazolo[1,5-a]pyrimidine-6-one derivatives

“…2d, the shifted imine band to a lower frequency in the FSM-16@Imine-Thiophen/Pd nanocatalyst (from 1635 cm −1 to 1627 cm −1 ), which confirms the formation of palladium complex on the surface of FSM-16@Imine-Thiophen. 11,31–33…”

Magnetically Recoverable Catalysts: Catalysis in Synthesis of Polyhydroquinolines

“…The structure of Fe 3 O 4 @FSM‐16‐SO 3 H was characterized by SEM, BET, XRD, EDS, VSM and FT‐IR spectroscopy techniques. X‐ray analysis exhibited that the Fe cations of Fe 3 O 4 cores are well dispersed in the FSM‐16 framework . Several catalysts and solvents were examined in order to find the best reaction conditions.…”

“…Shiri et al also found that sulfamic acid, immobilized on amino-functionalized magnetic nanoparticles with an average size of 15 nm, is a highly active catalyst for the synthesis of polyhydroquinoline derivatives. [133] As outlined in Scheme 23, the resulting nanocatalyst (Fe 3 [134] A series of spectroscopic techniques was applied to confirm the structure of [135] Several catalysts and solvents were examined in order to find the best reaction conditions. A variety of aromatic aldehydes successfully reacted in hantzsch reaction at refluxing ethanol; the target products were afforded with admirable yields in less than 50 min (Scheme 25).…”

“…The reaction can be visualized as proceeding through a Knoevenagel condensation product which is the key intermediate. In this step, the catalyst plays an important role in the condensation of the activated aldehydes (by the tribromide ions, [138,145] ionic liquids [141,146,147] and acid catalysts, including; (Lewis acid: transition metals [70,115,120,123,148] ) or (Brønsted-Lowry acid: acidic protons [131,135,149,150] )) with the active methylene compounds (dimedone or ethyl acetoacetate) in order to give an α,β-unsaturated intermediate. It is worth mentioning that, regarding the basic catalysts, the basic sites abstract the acidic proton of methylene compounds to promote the Knoevenagel condensation between the…”

“…Cu-SPATBA/Fe 3 O 4 65 98 [122] 10 Pd-SBTU@Fe 3 O 4 140 95 [123] 11 Ni (NO 3 ) 2 − Imine/Thiophene-Fe 3 O 4 @SiO 2 40 98 [124] 12 Fe 3 O 4 -DETA-Cu (II) 20 98 [28] 13 Fe 3 O 4 -Adenine-Ni 145 96 [115] 14 γ-Fe 2 O 3 /Cu@cellulose 15 98 [125] 15 Ru III @CMC/Fe 3 O 4 15 95 [126] 16 CoFe 2 O 4 @SiO 2 -CPTES-Guanidine-Cu (II) 10 95 [127] 17 Fe 3 O 4 -SA-PPCA 120 95 [128] 18 [135] 26 Fe 3 O 4 @D-NH-(CH 2 ) 4 -SO 3 H 9 0 8 6 [152] 27 Fe 3 O 4 -TEDETA-Br 3 120 92 [138] 28 Br 3 -TBA-Fe 3 O 4 10 98 [1] 29 Fe 3 O 4 MNPs-DETA tribromide 10 99 [139] 30 Fe 3 O 4 @SiO 2 @(CH 2 ) 3 Im}C (NO 2 ) 3 18 89 [109] 31 Fe 3 O 4 @SiO 2 @(CH 2 ) 3 Im}C (CN) 3 20 92 [147] 32 NMSMSA 20 93 [150] 33 AIL-SCMNPs 15 80 [141] 34 BIL@MNP 20 89 [142] 35 Fe 3 O 4 @SiO 2 -PEG/NH 2 20 96 [143] 36 Fe 3 O 4 @SiO 2 @PPh 3 @Cr 2 O 7 2− 15 98 [144] 37 Fe 3 O 4 @GA@IG 45 89 [38] a38 Isolated yield.…”