Sodium Hydroxide → 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazole-5-carboxylic acid

HRID 216530Notes

Reaction equation

HRID 216530 reaction equation
C[O:2][C:3]([C:5]1[C:13]([NH:14][C:15]2[CH:20]=[CH:19][C:18]([Br:21])=[CH:17][C:16]=2[Cl:22])=[C:12]([F:23])[C:8]2[N:9]=[CH:10][NH:11][C:7]=2[CH:6]=1)=[O:4].[OH-].[Na+]>CCO.C(OCC)(=O)C.O.Cl>[Br:21][C:18]1[CH:19]=[CH:20][C:15]([NH:14][C:13]2[C:5]([C:3]([OH:4])=[O:2])=[CH:6][C:7]3[NH:11][CH:10]=[N:9][C:8]=3[C:12]=2[F:23])=[C:16]([Cl:22])[CH:17]=1

Participants

7

Reactant 2

HCID 14798Sodium HydroxideHCID 11749905Methyl 6-((4-bromo-2-chlorophenyl)amino)-7-fluoro-1H-benzo[d]imidazole-5-carboxylate

Product 1

HCID 211141586-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazole-5-carboxylic acidYield 39.2%

Reagents, catalysts & solvents 4

HCID 313Hydrochloric AcidSolventHCID 702EthanolSolventHCID 962WaterSolventHCID 8857Ethyl AcetateSolvent

Procedure

6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazole-5-carboxylic acid methyl ester 8b (58 mg, 0.146 mmol) is suspended in EtOH (2 mL) and 1 mL 2 N NaOH is added. After 16 hours, the reaction mixture is diluted with ethyl acetate, water, and 10% HCl solution. The layers are separated and the organic layer is washed with brine. The organic layer is dried (MgSO4) and concentrated under reduced pressure. Trituration with MeOH provides 22 mg (39%) pure desired product.

Workup

  1. customThe layers are separated
  2. washthe organic layer is washed with brine
  3. dry with materialThe organic layer is dried (MgSO4)
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-dab01b53f5d340ff8f9423a05e2586d7
Source dataset
uspto-grants-2012_06
Patent number
US08193230B2

Reaction notes

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