(3R)-3-(cyclopentyl methyl)-4-[(5S)-5-(4-morpholinylcarbonyl)-4,5-dihydro-1H-pyrazol-1-yl]-4-oxo-N-[(phenylmethyl)oxy]butanamide → (3R)-3-(cyclopentylmethyl)-N-hydroxy-4-[(5S)-5-(4-morpholinylcarbonyl)-4,5-dihydro-1H-pyrazol-1-yl]-4-oxobutanamide

Participants

Reaction Steps

To a solution of (3R)-3-(cyclopentylmethyl)-4-[(5S)-5-(4-morpholinylcarbonyl)-4,5-dihydro-1H-pyrazol-1-yl]-4-oxo-N-[(phenylmethyl)oxy]butanamide (57 mg, 0.12 mmol) in methanol (5 mL) was added Pearlman's catalyst (17 mg, 0.024 mmol). The mixture then was stirred under 1 atm of H2 for 1 hour. After 1 hour, 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 (3R)-3-(cyclopentylmethyl)-N-hydroxy-4-[(5S)-5-(4-morpholinylcarbonyl)-4,5-dihydro-1H-pyrazol-1-yl]-4-oxobutanamide (19 mg, 0.047 mmol, 39% yield) as a white solid. MS: 381 ([M+H]+). 1H NMR (400 MHz, METHANOL-d4) δ ppm 1.07-1.29 (m, 2H) 1.36-1.48 (m, 1H) 1.50-1.69 (m, 4H) 1.72-2.03 (m, 5H) 2.19-2.30 (m, 1H) 2.36-2.53 (m, 1H) 2.77-3.01 (m, 2H) 3.46-3.98 (m, 10H) 5.15-5.29 (m, 1H) 7.03-7.07 (m, 1H).

Provenance & Evidence