The first synthesis of azo bearing coumarins from azo aldehydes and malononitrile in the presence of an efficient catalyst, trichlorotriazine under ultrasound irradiation 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 FTIR, NMR and elemental analysis.

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3O4. -Several substituted C-6 azo-functionalized 3-cyanocoumarins are either synthesized from azo aldehydes and malononitrile in the presence of reusable magnetic nano Fe 3O4 or by diazotization of 3-cyanocoumarins. The influence of ultrasound irradiation and grinding on the reaction yield is investigated. -(NIKPASSAND*, M.; FEKRI, L.; CHANGIZ, N.; IMANI, F.; Lett. Org. Chem. 11 (2014) 1, 29-34, http://dx.doi.org/10.2174/157017861101140113160517 ; Dep. Chem., Islamic Azad Univ., Rasht, Iran; Eng.) -F. Berndt 24-153