Synthesis of spiro[benzochromeno[2,3-d]pyrimidin-indolines] using Fe3O4@MCM-41-SO3H@[HMIm][HSO4] as a magnetically separable nanocatalyst

Synthesis, characterization, and catalytic application of Fe3O4‐Si‐[CH2]3‐N=CH‐aryl for the efficient synthesis of novel poly‐substituted pyridines

“…Fe 3 O 4 MNPs were synthesized according to our previous reports with a diameter about 20 nm . The synthesized Fe 3 O 4 nanoparticles were suspended by ultrasonic irradiation in a mixture of 150 mL of dry toluene containing a stoichiometric amount of 3‐aminopropyltrimethoxysilane.…”

“…In continuation of our previous work on the design of new nanocatalysts for organic synthesis, here we investigate the immobilization of benzaldehyde derivatives on amino‐functionalized Fe 3 O 4 for the preparation of novel 1‐aryl‐ N ‐propylsysilyl‐metahnimine@Fe 3 O 4 (APSMI@ Fe 3 O 4 , Fe 3 O 4 ‐Si‐(CH 2 ) 3 ‐N=CH‐Aryl,) and 1‐aryl‐ N ‐propylsysilyl‐metahnamine@Fe 3 O 4 (APSMA@Fe 3 O 4 , Fe 3 O 4 ‐Si‐(CH 2 ) 3 ‐NH‐CH 2 ‐Aryl) MNPs and study their performances as strong, recoverable, and stable catalysts for the synthesis of some novel poly‐substituted pyridine derivatives. Also, the effect of substitution on the aromatic ring of APSMI@Fe 3 O 4 on the time and yield of the reaction is investigated.…”

Overview on magnetically recyclable ferrite nanoparticles: synthesis and their applications in coupling and multicomponent reactions

“…Further, the catalyst could be reused for 5 cycles without loss of its catalytic activity (Scheme 49). 202 In an another publication, Kefayati et The catalyst could catalyse the synthesis of benzo[f]chromeno [2,3-d]pyrimidinones at room temperature using solvent free conditions where para substituted aromatic aldehyde derivatives gave better yields followed by meta and ortho substituted derivatives. Further, the only 50 mg of the catalyst was required to catalyze the reaction and could be used for 5 cycles without any loss in its activity (Scheme 51).…”

Functionalized Ordered Mesoporous Silicas (MCM-41): Synthesis and Applications in Catalysis

“…The use of supported Fe3O4@MCM-41-SO3H in the presence of the Brønsted acidic ionic liquid 1-methylimidazolium hydrogen sulphate [HMim][HSO4] has been evaluated [159]. Three types of MCM-41 mesoporous magnetite catalyst, Fe3O4@MCM-41-(CH2)3-SO3H, Fe3O4@MCM-41-SO3H and Fe3O4@MCM-41-SO3H@[HMIm][HSO4] were compared.…”