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Fe3O4 magnetic nanoparticles as efficient and recyclable catalysts for preparation of 3-azaaryl-3-hydroxyindolin- 2-ones under ultrasound irradiation

AlirezaKhorshidi, Shahab Shariati

Fe3O4magnetic nanoparticleswere synthesized via chemical precipitationmethod and used as anefficient andrecyclablecatalyst inultrasound-assisted sp3C-Hfunctionalization of 2-methylpyridines.Good yields of 3-substituted-3-hydroxyindolin-2-oneswere obtained via reaction of 2-methylpyridines and isatins undermildconditions.The catalyst, retainedactivityfor five runs.