Hydrochloric Acid → N-methyl-3-(2,6-dichloro-4-trifluoromethylphenyloxy)-5-methylpyrazole-1-carboxamide

HRID 644866Notes

Reaction equation

HRID 644866 reaction equation
C(N(CC)CC)C.[CH3:8][N:9]=[C:10]=[O:11].[Cl:12][C:13]1[CH:18]=[C:17]([C:19]([F:22])([F:21])[F:20])[CH:16]=[C:15]([Cl:23])[C:14]=1[O:24][C:25]1[CH:29]=[C:28]([CH3:30])[NH:27][N:26]=1.Cl>C(OCC)(=O)C>[CH3:8][NH:9][C:10]([N:27]1[C:28]([CH3:30])=[CH:29][C:25]([O:24][C:14]2[C:15]([Cl:23])=[CH:16][C:17]([C:19]([F:22])([F:20])[F:21])=[CH:18][C:13]=2[Cl:12])=[N:26]1)=[O:11]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 8471TriethylamineHCID 12228Methyl IsocyanateHCID 178623603-(2,6-Dichloro-4-trifluoromethylphenyloxy)-5-methylpyrazole

Product 1

HCID 17862464N-methyl-3-(2,6-dichloro-4-trifluoromethylphenyloxy)-5-methylpyrazole-1-carboxamideYield 59.1%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

Triethylamine (0.40 g, 4.0 mmol) and methyl isocyanate (0.25 g, 4.4 mmol) were added to a solution of 3-(2,6-dichloro-4-trifluoromethylphenyloxy)-5-methylpyrazole (1.24 g, 4.0 mmol) in ethyl acetate (20 ml), and the mixture was stirred at room temperature for 6 hours. After completion of the reaction, the reaction mixture was poured into 2N hydrochloric acid and extracted with ethyl acetate (20 ml×3). An organic layer was washed with water, dried over anhydrous magnesium sulfate and filtered to remove a desiccant, and the solvent was distilled off from the filtrate under reduced pressure. The resultant crude product was purified with a silica gel column (ethyl acetate/hexane=1/10), to give a white solid of N-methyl-3-(2,6-dichloro-4-trifluoromethylphenyloxy)-5-methylpyrazole-1-carboxamide (0.87 g, yield: 59.0%). mp: 113-114° C.; 1H-NMR (CDCl3, TMS, ppm): δ 2.60 (d, J=0.7 Hz, 3H), 2.88 (d, J=4.9 Hz, 3H), 5.77 (d, J=0.7 Hz, 1H), 6.50-6.75 (m, 1H), 7.66 (s, 2H).

Workup

  1. customAfter completion of the reaction
  2. extractionextracted with ethyl acetate (20 ml×3)
  3. washAn organic layer was washed with water
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationfiltered
  6. customto remove a desiccant, and the solvent
  7. distillationwas distilled off from the filtrate under reduced pressure
  8. customThe resultant crude product was purified with a silica gel column (ethyl acetate/hexane=1/10)

Sources & evidence

ORD record
ord-01941dfc4fda4032be5c120d7f87b44f
Source dataset
uspto-grants-2010_04
Patent number
US07700786B2

Reaction notes

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