4-Hydrazinobenzoic acid → Deferasirox

HRID 1092190Notes

Reaction equation

HRID 1092190 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[O:9][C:10]2[CH:18]=[CH:17][CH:16]=[CH:15][C:11]=2[C:12](=O)[N:13]=1.[NH:19]([C:21]1[CH:29]=[CH:28][C:24]([C:25]([OH:27])=[O:26])=[CH:23][CH:22]=1)[NH2:20]>CC1CCCO1.C(O)(=O)CC>[CH:16]1[CH:17]=[CH:18][C:10]([OH:9])=[C:11]([C:12]2[N:13]=[C:8]([C:3]3[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=3[OH:1])[N:19]([C:21]3[CH:29]=[CH:28][C:24]([C:25]([OH:27])=[O:26])=[CH:23][CH:22]=3)[N:20]=2)[CH:15]=1

Participants

5

Reactant 2

HCID 120894-Hydrazinobenzoic acidHCID 1356857232-(2-Hydroxyphenyl)-4H-1,3-benzoxazin-4-one

Product 1

HCID 214348DeferasiroxYield 50.4%

Reagents, catalysts & solvents 2

HCID 1032Propionic AcidSolventHCID 73012-MethyltetrahydrofuranSolvent

Conditions

Temperature
98 °C

Procedure

A suspension of 0.7 g (2.92 mmol) of 2-(2-hydroxyphenyl)benz[e][1,3]oxazin-4-one and 0.52 g (3.44 mmol) of 4-hydrazinobenzoic acid in 8 ml of 2-methyltetrahydrofuran and 5 ml of propionic acid is heated to its boiling point and maintained at this temperature (98° C.) for 2 hours. After completion of the reaction, the mixture is cooled and filtered. The product is washed with 2-methyltetrahydrofuran. After drying, 0.55 g of raw deferasirox is obtained, i.e. 50% of the theory, with an HPLC purity of 95.3% and a melting temperature of 255 to 262° C.

Workup

  1. temperatureis heated to its boiling point
  2. customAfter completion of the reaction
  3. temperaturethe mixture is cooled
  4. filtrationfiltered
  5. washThe product is washed with 2-methyltetrahydrofuran
  6. customAfter drying

Sources & evidence

ORD record
ord-70c1d9b9a78b4eb5a4b60b94d7765da7
Source dataset
uspto-grants-2012_03
Patent number
US08129421B2

Reaction notes

Loading…