Sodium Hydroxide → [(3-{[4-(2-tert-Butylphenyl)piperazin-1-yl]carbonyl}-1-methyl-1H-pyrazol-5-yl)oxy]acetic acid

HRID 535013Notes

Reaction equation

HRID 535013 reaction equation
[C:1]([C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[N:11]1[CH2:16][CH2:15][N:14]([C:17]([C:19]2[CH:23]=[C:22]([O:24][CH2:25][C:26]([O:28]C)=[O:27])[N:21]([CH3:30])[N:20]=2)=[O:18])[CH2:13][CH2:12]1)([CH3:4])([CH3:3])[CH3:2].[OH-].[Na+]>O1CCCC1.CO>[C:1]([C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[N:11]1[CH2:16][CH2:15][N:14]([C:17]([C:19]2[CH:23]=[C:22]([O:24][CH2:25][C:26]([OH:28])=[O:27])[N:21]([CH3:30])[N:20]=2)=[O:18])[CH2:13][CH2:12]1)([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 2

HCID 14798Sodium HydroxideHCID 86663403Methyl [(3-{[4-(2-tert-butylphenyl)piperazin-1-yl]carbonyl}-1-methyl-1H-pyrazol-5-yl)oxy]acetate

Product 1

HCID 66792875[(3-{[4-(2-tert-Butylphenyl)piperazin-1-yl]carbonyl}-1-methyl-1H-pyrazol-5-yl)oxy]acetic acidYield 54.3%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

A mixture of methyl [(3-{[4-(2-tert-butylphenyl)piperazin-1-yl]carbonyl}-1-methyl-1H-pyrazol-5-yl)oxy]acetate (0.573 g, 1.38 mmol) and 1 M sodium hydroxide solution (5 mL) in tetrahydrofuran (20 mL) and methanol (20 mL) was stirred at room temperature for 3 h. Solvent was removed and 1 M hydrochloric acid solution added to the mixture. The mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure to purify the residue by HPLC (Gilson Preparative HPLC System; column: YMC Combiprep ODS-A, S-5 μm, 50×20 mm; solvent: A; water containing 0.1% TFA, B; acetonitrile containing 0.1% TFA; gradient cycle: 0.00 min (A/B=90/10), 1.00 min (A/B=90/10), 4.20 min (A/B=10/90), 5.40 min (A/B=10/90), 5.50 min (A/B=90/10), 5.60 min (A/B=90/10); flow rate: 25 mL/min; detect: UV 220 nm). Solvent was removed to afford a solid (0.3 g, 54%).

Workup

  1. customSolvent was removed
  2. addition1 M hydrochloric acid solution added to the mixture
  3. extractionThe mixture was extracted with ethyl acetate
  4. washThe organic layer was washed with brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customto purify the residue by HPLC (Gilson Preparative HPLC System
  9. custom0.00 min
  10. custom1.00 min
  11. custom4.20 min
  12. custom5.40 min
  13. custom5.50 min
  14. custom5.60 min
  15. customSolvent was removed

Sources & evidence

ORD record
ord-f3e0441884674273873ea154272719f5
Source dataset
uspto-grants-2014_10
Patent number
US08853215B2

Reaction notes

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