Abstract:

With substituted azoaromatic diacid and thionyl chloride as starting materials，eight substituted azobenzene diacyl chlorides were first synthesized under ultrasonic irradiation in the absence of catalyst. Compared with conventional heating method, the reaction time was shortened from 12 to 4 h, and the yields were in the range of 80%～95%. The structures of all products were characterized by 1H NMR, IR spectra and elemental analysis.

Key words: ultrasonic irradiation, substituted azoaromatic diacid, substituted azobenzene diacly chloride, synthesis