An efficient and green synthesis of novel benzoxazole under ultrasound irradiation

Ultrasound as green process and an alternative energy source was investigated for the environmentally benign synthesis of novel benzoxazoles from different azo-linked salicylic acid derivatives and 2-amino-4-chlorophenol in short reaction time and high yield. These benzoxazole compounds have been characterized by elemental analysis, FT-IR, 1H NMR and 13C NMR spectroscopy.