Patent 11078167 was granted and assigned to Aurobindo Pharma on August, 2021 by the United States Patent and Trademark Office.
The present invention provides an improved process for the preparation of Deferasirox of Formula-I substantially free from ‘hydrazino impurity’ by the condensation of 2-(2-hydrophenyl)-4H-1,3-benzoxazin-4-one of Formula-IV with 4-hydrazino benzoic acid of Formula-V in a polar solvent.