2-Phenyl-5-(trifluoromethyl)-oxazole-4-carboxylic acid → HCID 66738198, compound

HRID 557789Notes

Reaction equation

HRID 557789 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([O:14][C:15]2[CH:20]=[CH:19][C:18]([N+:21]([O-])=O)=[CH:17][CH:16]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:24]1([C:30]2[O:31][C:32]([C:38]([F:41])([F:40])[F:39])=[C:33]([C:35](O)=[O:36])[N:34]=2)[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1>>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([O:14][C:15]2[CH:20]=[CH:19][C:18]([NH:21][C:35]([C:33]3[N:34]=[C:30]([C:24]4[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=4)[O:31][C:32]=3[C:38]([F:40])([F:41])[F:39])=[O:36])=[CH:17][CH:16]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

3

Reactant 2

HCID 27764382-Phenyl-5-(trifluoromethyl)-oxazole-4-carboxylic acidHCID 2794776Tert-butyl 4-(4-nitrophenoxy)piperidine-1-carboxylate

Product 1

HCID 66738198HCID 66738198, compound

Procedure

To a solution of 4-fluoronitrobenzene (1.41 g, 10 mmol) in THF (50 mL) was added N-Boc-4-hydroxypiperidine (2.01 g, 10 mmol) and sodium hydride (60% in mineral oil, 583 mg, 14.5 mmol). The mixture was stirred at room temperature for 14 hrs. After purification through flash column chromatography, 4-(4-nitro-phenoxy)-piperidine-1-carboxylic acid tert-butyl ester (2.51 g, 78% yield) was obtained as a solid. This nitro compound was hydrogenated to the corresponding amine and coupled with 2-phenyl-5-trifluoromethyloxazole-4-carboxylic acid to give 4-{4-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-phenoxy}-piperidine-1-carboxylic acid tert-butyl ester. LC-MS showed a single peak with a retention time of 4.08 min. LRMS calcd for C27H28F3N3O5 (M+1) 532.20, obsd 532.1

Sources & evidence

ORD record
ord-b1e19151a0614c5d84ebd9a65307c772
Source dataset
uspto-grants-2011_11
Patent number
US08058299B2

Reaction notes

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