The first synthesis of azo bearing coumarins from azo aldehydes and malononitrile in the presence of efficient
recyclable catalyst, nano particle Fe3O4 under ultrasound irradiation and under grinding reaction in high yield and short
reaction time is reported. In the other study, the first electrophilic substitution under ultrasound irradiation for the synthesis
of azo bearing coumarins was developed. All of synthesized compounds were characterized by IR, NMR and elemental
Keywords: Coumarins, nano-Fe3O4, malononitrile, azo aldehydes.
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