Water → 4-(3-Methoxypropoxy)-2-methylpyridine 1-oxide

Temperature

60 °C

5.85 g (0.065 mol) of methoxypropanol was dissolved in 60 ml of dimethyl sulfoxide to obtain a solution. 2.6 g (0.065 mol) of sodium hydride was added to this solution at a room temperature in a nitrogen atmosphere. The obtained mixture was stirred at 60° C. for 0.5 hour. A solution of 4.66 g (0.0325 mol) of 4-chloro-2-methylpyridine 1-oxide in 20 ml of dimethyl sulfoxide was dropwise added to the mixture under cooling with ice. The mixture was stirred at 40° C. for one hour. After the completion of the reaction, the reaction mixture was concentrated under a reduced pressure to obtain a solid. 200 ml of water was added to this solid. The obtained mixture was extracted with chloroform and the obtained extract was dried over magnesium sulfate and filtered. The filtrate was concentrated under a reduced pressure and purified by silica gel column chromatography (ethyl acetate/methanol) to obtain 4.09 g of the title compound.

1. customto obtain a solution
2. temperatureunder cooling with ice
3. stirringThe mixture was stirred at 40° C. for one hour
4. customAfter the completion of the reaction
5. concentrationthe reaction mixture was concentrated under a reduced pressure
6. customto obtain a solid
7. extractionThe obtained mixture was extracted with chloroform
8. extractionthe obtained extract
9. dry with materialwas dried over magnesium sulfate
10. filtrationfiltered
11. concentrationThe filtrate was concentrated under a reduced pressure
12. custompurified by silica gel column chromatography (ethyl acetate/methanol)

ORD record

ord-55419ad2db994b36956d5eed1b6a4eea

Source dataset

uspto-grants-1991_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05045552