Dimethylformamide → 2-[3-(Phenylthio)pyridin-4-yl]-5-(trifluoromethyl)benzoxazole

HRID 884863Notes

Reaction equation

HRID 884863 reaction equation
F[C:2]1[CH:3]=[N:4][CH:5]=[CH:6][C:7]=1[C:8]1[O:9][C:10]2[CH:16]=[CH:15][C:14]([C:17]([F:20])([F:19])[F:18])=[CH:13][C:11]=2[N:12]=1.C(=O)([O-])[O-].[K+].[K+].CN(C=O)C.[C:32]1([SH:38])[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1>O>[C:32]1([S:38][C:2]2[CH:3]=[N:4][CH:5]=[CH:6][C:7]=2[C:8]2[O:9][C:10]3[CH:16]=[CH:15][C:14]([C:17]([F:20])([F:19])[F:18])=[CH:13][C:11]=3[N:12]=2)[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1

Participants

6

Reactant 4

HCID 6228Dimethylformamide2×HCID 7969ThiophenolHCID 11430Potassium CarbonateHCID 668801802-(3-Fluoropyridin-4-yl)-5-(trifluoromethyl)benzoxazole

Product 1

HCID 668800372-[3-(Phenylthio)pyridin-4-yl]-5-(trifluoromethyl)benzoxazoleYield 81.2%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To a mixture of 0.28 g of 2-(3-fluoropyridin-4-yl)-5-(trifluoromethyl)benzoxazole, 0.40 g of potassium carbonate and 2 ml of DMF, a mixture of 0.17 g of thiophenol and 0.5 ml of DMF was added. The reaction mixture was stirred at room temperature for one hour. Water was added to the reaction mixture, which was extracted with ethyl acetate. The organic layer was washed with a saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to give 0.30 g of 2-[3-(phenylthio)pyridin-4-yl]-5-(trifluoromethyl)benzoxazole (hereinafter, referred to as “active compound 49”).

Workup

  1. additionwas added
  2. extractionwas extracted with ethyl acetate
  3. washThe organic layer was washed with a saturated sodium chloride solution
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-428a372585d948e7ac9be93cf4e44558
Source dataset
uspto-grants-2012_08
Patent number
US08242133B2

Reaction notes

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