Pyridine → (S)-1-(tetrahydro-pyran-4-yl)-pyrrolidine-2-carboxylic acid [3-(2-hydroxyimino-1,1-dimethyl-ethyl)-isoxazol-5-yl]-amide

Participants

Reaction Conditions

Reaction Steps

To 90.0 mg (0.27 mmol) of (S)-1-(tetrahydro-pyran-4-yl)-pyrrolidine-2-carboxylic acid [3-(1,1-dimethyl-2-oxo-ethyl)-isoxazol-5-yl]-amide in MeOH (3.00 mL) are added 22.4 mg (0.32 mmol) hydroxylamine hydrochloride and 58.5 μL (0.72 mmol) pyridine. The reaction is stirred at 60° C. for 3 h. The solvent is removed under reduced pressure and the residue is purified by HPLC-MS to afford 79.0 mg of (S)-1-(tetrahydro-pyran-4-yl)-pyrrolidine-2-carboxylic acid [3-(2-hydroxyimino-1,1-dimethyl-ethyl)-isoxazol-5-yl]-amide. Yield: 84%; ESI-MS: 351 [M+H]+; HPLC (Rt): 1.04 min (method E)

Provenance & Evidence