Hydrochloric Acid → HCID 88386888, compound

HRID 376033Notes

Reaction equation

HRID 376033 reaction equation
[CH3:1][O:2][C:3](=[O:21])/[C:4](/[C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][C:8]=1[O:13][C:14]1[CH:19]=[CH:18][C:17]([CH3:20])=[CH:16][CH:15]=1)=[N:5]/[OH:6].[H-].[Na+].[CH3:24]OS(OC)(=O)=O.Cl>O1CCCC1.O>[CH3:1][O:2][C:3](=[O:21])/[C:4](/[C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][C:8]=1[O:13][C:14]1[CH:15]=[CH:16][C:17]([CH3:20])=[CH:18][CH:19]=1)=[N:5]/[O:6][CH3:24]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 6497Dimethyl SulfateHCID 24758Sodium hydrideHCID 88361076HCID 88361076, compound

Product 1

HCID 88386888HCID 88386888, compoundYield 81.5%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent2×

Procedure

E-α-hydroxyimino-2-(4-methylphenoxy)pheylacetic acid methyl ester (0.71 g, 0.0025 mole) was dissolved in dried tetrahydrofuran (10 ml), followed by the addition of 60% sodium hydride (0.13 g, 0.033 mole). Then, the mixture was stirred at room temperature for 20 minutes and to this was added dropwise a solution of dimethylsulfate (0.44 g, 0.0035 mole) dissolved in dried THF (2.5 ml) under ice cooling, followed by stirring for 1.75 hours under ice cooling. After completion of the reaction, water was added to the reaction mixture which was adjusted to pH 1 with conc. hydrochloric acid. The mixture was extracted twice with methylene chloride, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (ethyl acetate/n-hexane) to obtain E-α-methoxyimino-2-(4-methylphenoxy)phenylacetic acid methyl ester (0.61 g, yield: 81.3%) as a colorless oil.

Workup

  1. stirringby stirring for 1.75 hours under ice cooling
  2. additionwas added to the reaction mixture which
  3. extractionThe mixture was extracted twice with methylene chloride
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe resulting residue was purified by silica gel chromatography (ethyl acetate/n-hexane)

Sources & evidence

ORD record
ord-4bce201d5f03434585884f32a89e2d16
Source dataset
uspto-grants-1996_01
Patent number
US05488159

Reaction notes

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