Methyl iodide → 3-[3-(6-Methoxy-m-tolyl)-1,2-benzisothiazol-5-yl]-1-methyl-6-(trifluoromethyl)-2,4(1H,3H)-pyrimidinedione

HRID 1274548Notes

Reaction equation

HRID 1274548 reaction equation
[CH3:1][O:2][C:3]1[C:8]([CH3:9])=[CH:7][C:6]([C:10]2[C:14]3[CH:15]=[C:16]([N:19]4[C:24](=[O:25])[CH:23]=[C:22]([C:26]([F:29])([F:28])[F:27])[NH:21][C:20]4=[O:30])[CH:17]=[CH:18][C:13]=3[S:12][N:11]=2)=[CH:5][CH:4]=1.[C:31](=O)([O-])[O-].[K+].[K+].IC>CN(C)C=O>[CH3:1][O:2][C:3]1[C:8]([CH3:9])=[CH:7][C:6]([C:10]2[C:14]3[CH:15]=[C:16]([N:19]4[C:24](=[O:25])[CH:23]=[C:22]([C:26]([F:28])([F:29])[F:27])[N:21]([CH3:31])[C:20]4=[O:30])[CH:17]=[CH:18][C:13]=3[S:12][N:11]=2)=[CH:5][CH:4]=1

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 701000153-[3-(6-Methoxy-m-tolyl)-1,2-benzisothiazol-5-yl)-6-(trifluoromethyl)-2,4(1H,3H)-pyrimidinedione

Product 1

HCID 700990583-[3-(6-Methoxy-m-tolyl)-1,2-benzisothiazol-5-yl]-1-methyl-6-(trifluoromethyl)-2,4(1H,3H)-pyrimidinedioneYield 98.8%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A mixture of 3-[3-(6-methoxy-m-tolyl)-1,2-benzisothiazol-5-yl]-6-(trifluoromethyl)-2,4(1H,3H)-pyrimidinedione (160 g, 0.369 mol), potassium carbonate (76.6 g, 0.554 mol) and iodomethane (34.5 mL, 0.554 mol) in N,N-dimethylformamide is stirred at room temperature for 4 hours, and poured onto ice. The resultant aqueous mixture is extracted with methylene chloride. The organic extract is diluted with hexanes, washed with water, dried over anhydrous magnesium sulfate, and concentrated in vacua to obtain the title product as an orange foam (163 g, 98.8%) which is identified by NMR spectral analyses.

Workup

  1. additionpoured onto ice
  2. extractionThe resultant aqueous mixture is extracted with methylene chloride
  3. extractionThe organic extract
  4. additionis diluted with hexanes
  5. washwashed with water
  6. dry with materialdried over anhydrous magnesium sulfate
  7. concentrationconcentrated in vacua

Sources & evidence

ORD record
ord-d8aba803f57445048a0f2de9f8a91d18
Source dataset
uspto-grants-2000_12
Patent number
US06156700

Reaction notes

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