Dimethylformamide → 2,6-Dimethyl-4-(hydroxymethyl)pyridine

Temperatur

-78 °C

4-Bromo-2,6-dimethylpyridine (2 g) was mixed with THF (30 ml) and cooled to −78° C. under argon atmosphere. A 1.65 M n-butyl lithium/hexane solution (8.5 ml) was added dropwise thereto, followed by stirring at −78° C. for 10 minutes, and DMF (1.3 ml) was added thereto. The reaction mixture was warmed to 0° C. over 1 hour, followed by stirring at 0° C. for 1 hour. Water and EtOAc were added to the reaction mixture, and the organic layer was dried over Na2SO4, and the reaction mixture was concentrated under reduced pressure. The obtained residue was mixed with MeOH (30 ml), and NaBH4 (610 mg) was added thereto, followed by stirring at room temperature for 1 hour. The reaction mixture was concentrated under reduced pressure, and CHCl3 and water were added to the obtained residue. The organic layer was dried over Na2SO4 and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (CHCl3/MeOH) to obtain (2,6-dimethylpyridin-4-yl)methanol (457 mg).

1. temperatureThe reaction mixture was warmed to 0° C. over 1 hour
2. stirringby stirring at 0° C. for 1 hour
3. dry with materialthe organic layer was dried over Na2SO4
4. concentrationthe reaction mixture was concentrated under reduced pressure
5. additionThe obtained residue was mixed with MeOH (30 ml), and NaBH4 (610 mg)
6. additionwas added
7. stirringby stirring at room temperature for 1 hour
8. concentrationThe reaction mixture was concentrated under reduced pressure, and CHCl3 and water
9. additionwere added to the obtained residue
10. dry with materialThe organic layer was dried over Na2SO4
11. concentrationconcentrated under reduced pressure
12. customThe obtained residue was purified by silica gel column chromatography (CHCl3/MeOH)

ORD-Eintrag

ord-ba23d2a9336b4a858a9d939e4b827471

Quelldatensatz

uspto-grants-2014_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08716470B2