Nitrogen → 5-Phenyl-oxazole-4-carboxylic acid {1-[2-(1-hydroxy-ethyl)-oxazol-5-ylmethyl]-1H-pyrazol-3-yl}-amide

HRID 2065062Notes

Reaction equation

N#N.C([Si](C)(C)[O:8][CH:9]([C:11]1[O:12][C:13]([CH2:16][N:17]2[CH:21]=[CH:20][C:19]([NH:22][C:23]([C:25]3[N:26]=[CH:27][O:28][C:29]=3[C:30]3[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=3)=[O:24])=[N:18]2)=[CH:14][N:15]=1)[CH3:10])(C)(C)C.CCCC[N+](CCCC)(CCCC)CCCC.[F-]>C1COCC1.CC(=O)OCC>[OH:8][CH:9]([C:11]1[O:12][C:13]([CH2:16][N:17]2[CH:21]=[CH:20][C:19]([NH:22][C:23]([C:25]3[N:26]=[CH:27][O:28][C:29]=3[C:30]3[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=3)=[O:24])=[N:18]2)=[CH:14][N:15]=1)[CH3:10]

Participants

Conditions

Temperature: 0 °C

Procedure

In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a solution of 5-phenyl-oxazole-4-carboxylic acid (1-{2-[1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-oxazol-5-ylmethyl}-1H-pyrazol-3-yl)-amide (271 mg, 0.55 mmol) in dry THF (5.5 mL) was treated at 0° C. with TBAF (1.1 mL of a 1M solution in THF, 1.1 mmol). The reaction mixture was stirred at 0° C. for 30 min. The mixture was then diluted with EA (10 mL), washed with NaHCO3 (10 mL) followed by brine (3×10 mL), dried over MgSO4, filtered and concentrated under reduced pressure. Purification of the residue by FC (EA) gave the title compound as a white foam. TLC: rf (EA)=0.18. LC-MS-conditions 02: tR=0.87 min; [M+H]+=380.34.

Workup

washwashed with NaHCO3 (10 mL)
dry with materialdried over MgSO4
filtrationfiltered
concentrationconcentrated under reduced pressure
customPurification of the residue by FC (EA)

Sources & evidence

ORD record: ord-1dd147b3155e49368f57ad11a5237aef
Source dataset: uspto-grants-2012_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08288419B2

Reaction notes

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