Acetyl chloride → 2-Phenyl-5-trifluoromethyl-oxazole-4-carboxylic acid [6-(4-acetyl-piperazin-1-yl)-pyridin-3-yl]-amide

HRID 1691920Notes

Reaction equation

HRID 1691920 reaction equation
Cl.[N:2]1([C:8]2[N:13]=[CH:12][C:11]([NH:14][C:15]([C:17]3[N:18]=[C:19]([C:26]4[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=4)[O:20][C:21]=3[C:22]([F:25])([F:24])[F:23])=[O:16])=[CH:10][CH:9]=2)[CH2:7][CH2:6][NH:5][CH2:4][CH2:3]1.C(N(CC)CC)C.[C:39](Cl)(=[O:41])[CH3:40]>C(Cl)Cl>[C:39]([N:5]1[CH2:6][CH2:7][N:2]([C:8]2[N:13]=[CH:12][C:11]([NH:14][C:15]([C:17]3[N:18]=[C:19]([C:26]4[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=4)[O:20][C:21]=3[C:22]([F:24])([F:25])[F:23])=[O:16])=[CH:10][CH:9]=2)[CH2:3][CH2:4]1)(=[O:41])[CH3:40]

Participants

5

Reactant 3

HCID 6367Acetyl chlorideHCID 8471TriethylamineHCID 667381792-Phenyl-5-trifluoromethyl-oxazole-4-carboxylic acid (6-piperazin-1-yl-pyridin-3-yl)-amide hydrochloride salt

Product 1

HCID 576519312-Phenyl-5-trifluoromethyl-oxazole-4-carboxylic acid [6-(4-acetyl-piperazin-1-yl)-pyridin-3-yl]-amide

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a suspension of 2-phenyl-5-trifluoromethyl-oxazole-4-carboxylic acid (6-piperazin-1-yl-pyridin-3-yl)-amide hydrochloride salt (65 mg, 0.13 mmol) in methylene chloride (5 mL) was added triethylamine (0.15 mL). The mixture was cooled in an ice bath and acetyl chloride (12 μL) was added. The mixture was stirred at room temperature for 30 minutes and partitioned between methylene chloride and brine. The organic layer was dried over sodium sulfate and the solvents were evaporated. The residue was first dried in vacuum and then triturated with methanol (3 mL) to give 2-phenyl-5-trifluoromethyl-oxazole-4-carboxylic acid [6-(4-acetyl-piperazin-1-yl)-pyridin-3-yl]-amide (21 mg) as a solid. LC-MS calcd for C22H20F3N5O3 (m/e) 459.2, obsd 460.0 (M+H). The NMR spectrum obtained on the sample is compatible with its structure.

Workup

  1. temperatureThe mixture was cooled in an ice bath
  2. custompartitioned between methylene chloride and brine
  3. dry with materialThe organic layer was dried over sodium sulfate
  4. customthe solvents were evaporated
  5. customThe residue was first dried in vacuum
  6. customtriturated with methanol (3 mL)

Sources & evidence

ORD record
ord-4d3722a173ff48638cd586c051a53c13
Source dataset
uspto-grants-2012_04
Patent number
US08153644B2

Reaction notes

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