(5S)-1-((2R)-2-(cyclopentylmethyl)-4-oxo-4-{[(phenylmethyl)oxy]amino}butanoyl)-N-phenyl-4,5-dihydro-1H-pyrazole-5-carboxamide → (5S)-1-[(2R)-2-(cyclopentylmethyl)-4-(hydroxyamino)-4-oxobutanoyl]-N-phenyl-4,5-dihydro-1H-pyrazole-5-carboxamide

HRID 1396990Notes

Reaction equation

HRID 1396990 reaction equation
[CH:1]1([CH2:6][C@H:7]([CH2:24][C:25](=[O:35])[NH:26][O:27]CC2C=CC=CC=2)[C:8]([N:10]2[C@H:14]([C:15]([NH:17][C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[O:16])[CH2:13][CH:12]=[N:11]2)=[O:9])[CH2:5][CH2:4][CH2:3][CH2:2]1>CO.[OH-].[OH-].[Pd+2]>[CH:1]1([CH2:6][C@H:7]([CH2:24][C:25]([NH:26][OH:27])=[O:35])[C:8]([N:10]2[C@H:14]([C:15]([NH:17][C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[O:16])[CH2:13][CH:12]=[N:11]2)=[O:9])[CH2:2][CH2:3][CH2:4][CH2:5]1

Participants

4

Reactant 1

HCID 86706405(5S)-1-((2R)-2-(cyclopentylmethyl)-4-oxo-4-{[(phenylmethyl)oxy]amino}butanoyl)-N-phenyl-4,5-dihydro-1H-pyrazole-5-carboxamide

Product 1

HCID 86706406(5S)-1-[(2R)-2-(cyclopentylmethyl)-4-(hydroxyamino)-4-oxobutanoyl]-N-phenyl-4,5-dihydro-1H-pyrazole-5-carboxamideYield 66%

Reagents, catalysts & solvents 2

HCID 9942167Palladium hydroxideCatalystHCID 887MethanolSolvent

Procedure

(5S)-1-((2R)-2-(Cyclopentylmethyl)-4-oxo-4-{[(phenylmethyl)oxy]amino}butanoyl)-N-phenyl-4,5-dihydro-1H-pyrazole-5-carboxamide (110 mg, 0.23 mmol) was dissolved in methanol (8 mL), and Pearlman's catalyst (37 mg, 0.05 mmol) was added. The resulting mixture was stirred under 1 atm of H2 for 30 min. After 30 min, the mixture was filtered, concentrated, and purified by Gilson HPLC (Sunfire Column 19×50 mm, flowrate 25 mL/min, 10 min, 5-65% MeCN:H2O) to afford (5S)-1-[(2R)-2-(cyclopentylmethyl)-4-(hydroxyamino)-4-oxobutanoyl]-N-phenyl-4,5-dihydro-1H-pyrazole-5-carboxamide (60 mg, 0.15 mmol, 66% yield) as a white solid. MS: 387 ([M+H]+). 1H NMR (400 MHz, METHANOL-d4) δ ppm 1.13 (none, 2H) 1.37-1.68 (m, 5H) 1.72-2.02 (m, 4H) 2.20-2.33 (m, 1H) 2.38-2.50 (m, 1H) 3.05-3.21 (m, 1H) 3.79-3.92 (m, 1H) 7.08-7.15 (m, 2H) 7.28-7.36 (m, 2H) 7.54-7.59 (m, 1H).

Workup

  1. waitAfter 30 min
  2. filtrationthe mixture was filtered
  3. concentrationconcentrated
  4. custompurified by Gilson HPLC (Sunfire Column 19×50 mm, flowrate 25 mL/min, 10 min, 5-65% MeCN:H2O)

Sources & evidence

ORD record
ord-adbcc20a99a34bdfb9a1d3de0fec64e8
Source dataset
uspto-grants-2014_12
Patent number
US08901119B2

Reaction notes

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