Potassium Carbonate → 5,5-dimethyl-3-(3-methoxy-1-methyl-5-trifluoromethyl-1H-pyrazol-4-ylmethylthio)-2-isoxazoline

HRID 1292770Notes

Reaction equation

HRID 1292770 reaction equation
O.[SH-].[Na+].[CH3:4][C:5]1([CH3:15])[O:9][N:8]=[C:7]([S:10]([CH2:13][CH3:14])(=O)=O)[CH2:6]1.C(=O)([O-])[O-].[K+].[K+].C(S([O-])=O)O.[Na+].ClCC1[C:31]([O:40][CH3:41])=[N:32][N:33]([CH3:39])[C:34]=1[C:35]([F:38])([F:37])[F:36]>CN(C)C=O.O>[CH3:4][C:5]1([CH3:15])[O:9][N:8]=[C:7]([S:10][CH2:13][C:14]2[C:31]([O:40][CH3:41])=[N:32][N:33]([CH3:39])[C:34]=2[C:35]([F:38])([F:36])[F:37])[CH2:6]1

Participants

8

Reactant 5

HCID 11430Potassium CarbonateHCID 16211346Sodium hydrosulfide hydrateHCID 178628814-chloromethyl-3-methoxy-1-methyl-5-trifluoromethyl-1H-pyrazoleHCID 178629235,5-Dimethyl-3-ethylsulfonyl-2-isoxazolineHCID 23689980Sodium Formaldehyde Sulfoxylate

Product 1

HCID 178628515,5-dimethyl-3-(3-methoxy-1-methyl-5-trifluoromethyl-1H-pyrazol-4-ylmethylthio)-2-isoxazolineYield 52%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

3.1 g of sodium hydrosulfide hydrate (purity: 70%, 22.0 mmoles) was added to a solution of 3.3 g (17.3 mmoles) of 5,5-dimethyl-3-ethylsulfonyl-2-isoxazoline dissolved in 10 ml of N,N-dimethylformamide. The mixture was stirred for 2 hours. Thereto were added 3.1 g (22.0 mmoles) of anhydrous potassium carbonate, 2.7 g (17.5 mmoles) of Rongalit and 4.0 g (17.5 mmoles) of 4-chloromethyl-3-methoxy-1-methyl-5-trifluoromethyl-1H-pyrazole. The resulting mixture was stirred at room temperature for 2 hours to give rise to a reaction. After the completion of the reaction, the reaction mixture was poured into water, followed by extraction with ethyl acetate. The resulting organic layer was washed with an aqueous sodium chloride solution and then dried over anhydrous magnesium sulfate. The resulting solution was subjected to vacuum distillation to remove the solvent contained therein. The residue was purified by silica gel column chromatography (developing solvent: hexane-ethyl acetate mixed solvent) to obtain 2.8 g (yield: 52.0%) of 5,5-dimethyl-3-(3-methoxy-1-methyl-5-trifluoromethyl-1H-pyrazol-4-ylmethylthio)-2-isoxazoline.

Workup

  1. stirringThe resulting mixture was stirred at room temperature for 2 hours
  2. customto give rise
  3. customto a reaction
  4. customAfter the completion of the reaction
  5. extractionfollowed by extraction with ethyl acetate
  6. washThe resulting organic layer was washed with an aqueous sodium chloride solution
  7. dry with materialdried over anhydrous magnesium sulfate
  8. distillationThe resulting solution was subjected to vacuum distillation
  9. customto remove the solvent
  10. customThe residue was purified by silica gel column chromatography (developing solvent: hexane-ethyl acetate mixed solvent)

Sources & evidence

ORD record
ord-9a6377109ae24e8a969274c1f18463dc
Source dataset
uspto-grants-2007_07
Patent number
US07238689B2

Reaction notes

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