Immobilization of copper(I) ions on magnetic nanoparticles was performed using surface modification of Fe3O4 with creatine. Fe3O4@creatine‐Cu(I) magnetic catalyst was synthesized and applied in C&bond;X cross‐coupling reactions with aryl halides in a deep eutectic as a green solvent. The results indicate the Fe3O4@creatine‐Cu(I) magnetic nanoparticles showed excellent activity and high stability. In addition, it was revealed that this catalyst can be recycled five times without significant loss in catalytic activity.
Ultrasound
irradiation as an environmentally friendly and inexpensive
method successfully applied for the synthesis of two-dimensional (2D)
and three-dimensional (3D) metal–organic frameworks (MOFs).
Sonochemically synthesized AM-Co1 and AM-Co2 powder has been employed
as a green heterogeneous catalyst for the oxidative amidation reaction.
The results show that AM-Co1 with a two-dimensional (2D) structure
can act as an excellent catalyst for this reaction under ultrasonic
irradiation compared to AM-Co2 with a three-dimensional (3D) structure.
According to green principles, we used water as a green solvent and
air as an oxidant for the oxidative amidation reaction. A wide variety
of aldehydes and amines have been used for the synthesis of amides
in good to excellent yields (75–90%). Also, the MOF catalyst
could be recovered and reused several times without loss of activity.
Vitamin B 6-Pd(II) immobilized onto magnetic nanoparticles have been successfully prepared and applied for C-Xcross-coupling reactions with aryl halides in green deep eutectic solvents. The results prove that the Fe 3 O 4 @vitamin B 6-Pd(II) magnetic nanoparticles show high catalyst activity and good stability. It was also revealed that this complex can be recycled up to five times without any significant loss in catalytic activity.
A highly efficient Fe 3 O 4 @VitB 1-Ag(I) magnetic catalyst has been obtained using surface modification of Fe 3 O 4. To this end, silver chloride was immobilized on Fe 3 O 4 nanoparticles via vitamin B 1 biomolecules. The synthesized biocompatible magnetic catalyst was applied in an A 3-coupling reaction in the presence of aldehyde, amine and phenyl acetylene under solvent-free conditions and afforded the desired products in excellent yields. Also, interactions between metal and ligand in the Fe 3 O 4 @VitB 1-Ag(I) were studied using theoretical calculations.
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