Hydrochloric Acid → 3-{3,5-Dimethyl-4-[6-(5-o-tolyl-[1,3,4]oxadiazol-2-yl)-1H-benzoimidazol-2-yl]-phenyl}-2,2-dimethyl-propionic acid

HRID 1360801Notes

Reaction equation

HRID 1360801 reaction equation
C[O:2][C:3](=[O:37])[C:4]([CH3:36])([CH3:35])[CH2:5][C:6]1[CH:11]=[C:10]([CH3:12])[C:9]([C:13]2[NH:17][C:16]3[CH:18]=[C:19]([C:22]4[O:23][C:24]([C:27]5[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=5[CH3:33])=[N:25][N:26]=4)[CH:20]=[CH:21][C:15]=3[N:14]=2)=[C:8]([CH3:34])[CH:7]=1.[OH-].[Na+].Cl>C1COCC1.CO.O>[CH3:12][C:10]1[CH:11]=[C:6]([CH2:5][C:4]([CH3:36])([CH3:35])[C:3]([OH:37])=[O:2])[CH:7]=[C:8]([CH3:34])[C:9]=1[C:13]1[NH:17][C:16]2[CH:18]=[C:19]([C:22]3[O:23][C:24]([C:27]4[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=4[CH3:33])=[N:25][N:26]=3)[CH:20]=[CH:21][C:15]=2[N:14]=1

Participants

7

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium Hydroxide2×HCID 669664013-{3,5-Dimethyl-4-[6-(5-o-tolyl-[1,3,4]oxadiazol-2-yl)-1H-benzoimidazol-2-yl]-phenyl}-2,2-dimethyl-propionic acid methyl ester

Product 1

HCID 252354593-{3,5-Dimethyl-4-[6-(5-o-tolyl-[1,3,4]oxadiazol-2-yl)-1H-benzoimidazol-2-yl]-phenyl}-2,2-dimethyl-propionic acid

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

Dissolve 3-{3,5-dimethyl-4-[6-(5-o-tolyl-[1,3,4]oxadiazol-2-yl)-1H-benzoimidazol-2-yl]-phenyl}-2,2-dimethyl-propionic acid methyl ester (286 mg, 0.578 mmol) in THF (2.9 mL)/MeOH (2.9 mL). Add 1 N NaOH (2.9 mL) and stir for 4 h. Add NaOH (102 mg, 2.55 mmol) in water (1 mL). Upon disappearance of the ester by LC/MS, concentrate the reaction. Acidify to pH 1.5 by addition of 1 N HCl (5.4 mL). Collect the solid by filtration and dry at 40° C. in a vacuum oven. Triturate the solid with DCM to afford the title compound as a white solid: (M+H)+ 481.0.

Workup

  1. concentrationUpon disappearance of the ester by LC/MS, concentrate
  2. customthe reaction
  3. customCollect the solid
  4. filtrationby filtration
  5. customdry at 40° C. in a vacuum oven
  6. customTriturate the solid with DCM

Sources & evidence

ORD record
ord-750bb974377044eb992bac9ec70cdfc7
Source dataset
uspto-grants-2011_02
Patent number
US07879850B2

Reaction notes

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