Sodium hydride → 4-(3-Methoxypropoxy)-2,3-dimethyl-1-oxo-1lambda~5~-pyridine

Temperatur

60 °C

2.0 g (22 mmol) of 3-methoxypropanol was dissolved in 50 ml of dimethyl sulfoxide to obtain a solution. 2.7 g (66 mmol) of sodium hydride was added to this solution at a room temperature. The obtained mixture was stirred at 60° C. for one hour and cooled to a room temperature by allowing to stand, followed by the addition of 3.0 g (19 mmol) of 4-chloro-2,3-dimethylpyridine N-oxide. The obtained mixture was stirred at 40° C. for one hour. After the completion of the reaction, the reaction mixture was distilled to remove the dimethyl sulfoxide. The obtained residue was purified by silica gel column chromatography to obtain 760 mg of 4-(3-methoxypropoxy)-2,3-dimethylpyridine N-oxide.

1. customto obtain a solution
2. temperaturecooled to a room temperature
3. stirringThe obtained mixture was stirred at 40° C. for one hour
4. customAfter the completion of the reaction
5. distillationthe reaction mixture was distilled
6. customto remove the dimethyl sulfoxide
7. customThe obtained residue was purified by silica gel column chromatography

ORD-Eintrag

ord-6065832ac4f342808f337ee295a7027f

Quelldatensatz

uspto-grants-1991_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05045552