Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1) → (S)-1-(tetrahydro-pyran-4-yl)pyrrolidine-2-carboxylic acid [3-(2-hydroxy-1,1-dimethyl-ethyl)-isoxazol-5-yl]amide

HRID 538648Notes

Reaction equation

[CH3:1][C:2]([C:12]1[CH:16]=[C:15]([NH:17][C:18]([C@@H:20]2[CH2:24][CH2:23][CH2:22][N:21]2[CH:25]2[CH2:30][CH2:29][O:28][CH2:27][CH2:26]2)=[O:19])[O:14][N:13]=1)([CH3:11])[CH2:3][O:4]C1CCCCO1.C1(C)C=CC(S([O-])(=O)=O)=CC=1.[NH+]1C=CC=CC=1>CCO>[OH:4][CH2:3][C:2]([C:12]1[CH:16]=[C:15]([NH:17][C:18]([C@@H:20]2[CH2:24][CH2:23][CH2:22][N:21]2[CH:25]2[CH2:26][CH2:27][O:28][CH2:29][CH2:30]2)=[O:19])[O:14][N:13]=1)([CH3:11])[CH3:1]

Participants

Conditions

Temperature: 75 °C

Procedure

To 400 mg (0.95 mmol) of (S)-1-(tetrahydro-pyran-4-yl)-pyrrolidine-2-carboxylic acid (3-[1,1-dimethyl-2-(tetrahydro-pyran-2-yloxy)-ethyl]-isoxazol-5-yl)-amide in EtOH (6.00 mL) are added 119 mg (0.47 mmol) pyridinium-p-toluenesulfonate. The reaction is stirred at 75° C. for 28 h. The reaction mixture is purified by HPLC-MS to afford 240 mg of (S)-1-(tetrahydro-pyran-4-yl)pyrrolidine-2-carboxylic acid [3-(2-hydroxy-1,1-dimethyl-ethyl)-isoxazol-5-yl]amide. Yield: 75%; ESI-MS: 338 [M+H]+; HPLC (Rt): 0.82 min (method D)

Workup

customThe reaction mixture is purified by HPLC-MS

Sources & evidence

ORD record: ord-957a274e35f74a6c827a10bd12fa1954
Source dataset: uspto-grants-2014_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08865744B1

Reaction notes

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