Tetrahydrofuran → HCID 53956943, compound

HRID 279474Notes

Reaction equation

HRID 279474 reaction equation
C1COCC1.Cl[C:7]1[C:12]([Cl:13])=[CH:11][C:10]([C:14]([F:17])([F:16])[F:15])=[CH:9][N:8]=1.[H-].[Na+].[CH3:20][O:21][N:22]=[C:23]([C:32]1[O:36][N:35]=[C:34]([CH3:37])[CH:33]=1)[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=1[CH2:30][OH:31]>O>[CH3:20][O:21][N:22]=[C:23]([C:32]1[O:36][N:35]=[C:34]([CH3:37])[CH:33]=1)[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=1[CH2:30][O:31][C:7]1[C:12]([Cl:13])=[CH:11][C:10]([C:14]([F:17])([F:16])[F:15])=[CH:9][N:8]=1

Participants

6

Reactant 4

HCID 8028TetrahydrofuranHCID 24758Sodium hydrideHCID 1122342,3-Dichloro-5-(trifluoromethyl)pyridineHCID 53904665HCID 53904665, compound

Product 1

HCID 53956943HCID 53956943, compoundYield 71.4%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

THF (7.5 ml), 2,3-dichloro-5-trifluoromethylpyridine (0.81 g, 3.75 mmol) and 60% sodium hydride (0.12 g, 3.0 mmol) were added to 2-hydroxymethylphenyl 3-methylisoxazol-5-yl ketone O-methyloxime (0.62 g, 2.5 mmol) under ice-cooling, and the mixture was stirred at room temperature overnight. Water (100 ml) was added to the reaction mixture, and the mixture was extracted with ether (150 ml). The extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel chromatography (ethyl acetate/n-hexane) to give isomer A (0.29 g, yield: 27.2%) and isomer B (0.76 g, yield: 71.4%) of 2-(3-chloro-5-trifluoromethyl-2-pyridyloxymethyl)phenyl 3-methylisoxazol-5-yl ketone O-methyloxime.

Workup

  1. temperaturecooling
  2. extractionthe mixture was extracted with ether (150 ml)
  3. dry with materialThe extract was dried over anhydrous magnesium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by silica gel chromatography (ethyl acetate/n-hexane)

Sources & evidence

ORD record
ord-7dce2096b98f4a7c8f42fefb2702a28c
Source dataset
uspto-grants-2002_03
Patent number
US06362212B1

Reaction notes

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