Methanol → 2-(2,5-dimethylphenoxymethyl)phenyl oxazol-5-yl ketone O-methyloxime

HRID 1004369Notes

Reaction equation

HRID 1004369 reaction equation
C1(C)C=CC(S([CH2:10][N+:11]#[C-:12])(=O)=O)=CC=1.C(=O)([O-])[O-].[K+].[K+].CO.[CH3:22][C:23]1[CH:42]=[CH:41][C:40]([CH3:43])=[CH:39][C:24]=1[O:25][CH2:26][C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=1[C:33](=[N:36][O:37][CH3:38])[CH:34]=[O:35]>CCOCC>[CH3:38][O:37][N:36]=[C:33]([C:34]1[O:35][CH:12]=[N:11][CH:10]=1)[C:28]1[CH:29]=[CH:30][CH:31]=[CH:32][C:27]=1[CH2:26][O:25][C:24]1[CH:39]=[C:40]([CH3:43])[CH:41]=[CH:42][C:23]=1[CH3:22]

Participants

6

Reactant 4

HCID 887MethanolHCID 11430Potassium CarbonateHCID 161915Tosylmethyl isocyanideHCID 538610512-(2,5-Dimethylphenoxymethyl)-alpha-methoxyiminophenylacetaldehyde

Product 1

HCID 544754822-(2,5-dimethylphenoxymethyl)phenyl oxazol-5-yl ketone O-methyloximeYield 44.6%

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent

Procedure

p-Toluenesulfonylmethylisocyanide (0.23 g, 1.2 mmol), potassium carbonate (0.18 g, 1.3 mmol) and methanol (2 ml) were added to 2-(2,5-dimethylphenoxymethyl)-α-methoxyiminophenylacetaldehyde (0.30 g, 1 mmol), and the mixture was stirred under reflux for 2 hours. After completion of the reaction, ether (100 ml) was added, and the mixture was washed with brine (80 ml) twice. The ether layer was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel chromatography (ethyl acetate/n-hexane) and recrystallized from ethyl acetate/n-hexane to give 2-(2,5-dimethylphenoxymethyl)phenyl oxazol-5-yl ketone O-methyloxime (0.15 g, 44.6%) as colorless crystals.

Workup

  1. temperatureunder reflux for 2 hours
  2. additionwas added
  3. washthe mixture was washed with brine (80 ml) twice
  4. dry with materialThe ether layer was dried over anhydrous magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel chromatography (ethyl acetate/n-hexane)
  7. customrecrystallized from ethyl acetate/n-hexane

Sources & evidence

ORD record
ord-2fca4876e97c401387c2e9de040c7d48
Source dataset
uspto-grants-2000_04
Patent number
US06048885

Reaction notes

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