tert-butyl 3-({3-(benzyloxy)-5-[(1S)-2-methoxy-1-methylethoxy]benzoyl}amino)-1H-pyrazole-1-carboxylate → tert-Butyl 3-({3-hydroxy-5-[(1S)-2-methoxy-1-methylethoxy]benzoyl}amino)-1H-pyrazole-1-carboxylate

HRID 1990191Notes

Reaction equation

HRID 1990191 reaction equation
[CH3:1][C@H:2]([O:6][C:7]1[CH:8]=[C:9]([C:21]([NH:23][C:24]2[CH:28]=[CH:27][N:26]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[N:25]=2)=[O:22])[CH:10]=[C:11]([O:13]CC2C=CC=CC=2)[CH:12]=1)[CH2:3][O:4][CH3:5]>C1COCC1.C(O)C>[OH:13][C:11]1[CH:10]=[C:9]([C:21]([NH:23][C:24]2[CH:28]=[CH:27][N:26]([C:29]([O:31][C:32]([CH3:33])([CH3:35])[CH3:34])=[O:30])[N:25]=2)=[O:22])[CH:8]=[C:7]([O:6][C@@H:2]([CH3:1])[CH2:3][O:4][CH3:5])[CH:12]=1

Participants

4

Reactant 1

HCID 59127136tert-butyl 3-({3-(benzyloxy)-5-[(1S)-2-methoxy-1-methylethoxy]benzoyl}amino)-1H-pyrazole-1-carboxylate

Product 1

HCID 59127185tert-Butyl 3-({3-hydroxy-5-[(1S)-2-methoxy-1-methylethoxy]benzoyl}amino)-1H-pyrazole-1-carboxylateYield 97%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

A solution of 1,1-dimethylethyl 3-[({3-{[(1S)-1-methyl-2-(methyloxy)ethyl]oxy}-5-[(phenylmethyl)oxy]phenyl}carbonyl)amino]-1H-pyrazole-1-carboxylate (23 g, 47.8 mmol) in THF (140 mL) and ethanol (140 mL) was evacuated and purged with nitrogen (×3). 10% Palladium on carbon (2.3 g; 10% w/w) was added and reaction mixture was evacuated and finally purged with hydrogen gas. The reaction mixture was left to stir at RT under a hydrogen balloon for 16 hours. The palladium on carbon was filtered through diatomaceous earth and the filtrate concentrated in vacuo to give a white foam (18 g, 97%).

Workup

  1. custompurged with nitrogen (×3)
  2. addition10% Palladium on carbon (2.3 g; 10% w/w) was added
  3. customreaction mixture
  4. customwas evacuated
  5. customfinally purged with hydrogen gas
  6. waitThe reaction mixture was left
  7. filtrationThe palladium on carbon was filtered through diatomaceous earth
  8. concentrationthe filtrate concentrated in vacuo

Sources & evidence

ORD record
ord-f2510cc3cd534df3a9a9b4a0ecbe8e79
Source dataset
uspto-grants-2010_01
Patent number
US07642259B2

Reaction notes

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