Potassium Carbonate → 2,5-Difluoro-4-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]nitrobenzene

HRID 493941Notes

Reaction equation

HRID 493941 reaction equation
[F:1][C:2]1[CH:7]=[C:6](F)[C:5]([F:9])=[CH:4][C:3]=1[N+:10]([O-:12])=[O:11].[CH3:13][N:14]1[C:19]([C:20]([F:23])([F:22])[F:21])=[CH:18][C:17](=[O:24])[NH:16][C:15]1=[O:25].C(=O)([O-])[O-].[K+].[K+]>CS(C)=O>[F:1][C:2]1[CH:7]=[C:6]([N:16]2[C:17](=[O:24])[CH:18]=[C:19]([C:20]([F:22])([F:23])[F:21])[N:14]([CH3:13])[C:15]2=[O:25])[C:5]([F:9])=[CH:4][C:3]=1[N+:10]([O-:12])=[O:11]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 750121,2,4-Trifluoro-5-nitrobenzeneHCID 114354801-Methyl-6-trifluoromethylpyrimidine-2,4-dione

Product 1

HCID 121155092,5-Difluoro-4-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]nitrobenzeneYield 43%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Conditions

Temperature
80 °C

Procedure

First, 1.77 g of 2,4,5-trifluoronitrobenzene and 1.94 g of 3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidine were dissolved in 10 ml of dimethylsulfoxide, to which 1.52 g of anhydrous potassium carbonate was added at room temperature, and the mixture was stirred at 80° C. for 1 hour. The reaction mixture was cooled to room temperature and then poured into ice water, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and then concentrated. The residue was subjected to silica gel column chromatography to give 1.51 g of 2,5-difluoro-4-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]nitrobenzene.

Workup

  1. additionwas added at room temperature
  2. temperatureThe reaction mixture was cooled to room temperature
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe organic layer was washed with saturated aqueous sodium chloride solution
  5. dry with materialdried over anhydrous magnesium sulfate
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-5e90a6227ff44fb682a064377477cc77
Source dataset
uspto-grants-2009_05
Patent number
US07538072B2

Reaction notes

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