4-[3,5-Bis(2-hydroxyphenyl)-1H-1,2,4-triazol-1-yl]benzoic acid dimethyl-formamide monosolvate

Abstract

In the mol-ecule of deferasirox dimethyl-formamide solvate, C 21H 15N 3O 4·C 3H 7NO, the central 1,2,4-triazole ring is tilted with respect to the benzoic acid and one of the 2-hy-droxy-phenyl units but coplanar with the other 2-hy-droxy-phenyl group, as indicated by the dihedral angles of 33.69 (9), 72.57 (8) and 5.18 (9)°, respectively. Intra-molecular O - H⋯N hydrogen bonds generate an S(6) ring motif. In the crystal, deferasirox mol-ecules are linked by O - H⋯N hydrogen bonds and weak C - H⋯O inter-actions into chains along the c axis. The dimethyl-formamide solvent mol-ecules are located between the deferasirox chains and are linked to the deferasirox mol-ecules by O - H⋯O hydrogen bonds and weak C - H⋯O inter-actions.