Hexane → 1-(3,5-Dichloropyridin-4-yl)-3-methoxymethoxypropane

Temperatur

0 °C

3,5-Dichloropyridine (4.4 g, 30 mmol) is dissolved in THF (100 ml), and thereto is added a solution of n-butyl lithium in hexane (19 ml, 30 mmol) at −70° C., and the mixture is stirred for 15 minutes. 1-Bromo-3-methoxymethoxypropane (6.0 g, 33 mmol) is added to the mixture, and the mixture is warmed to 0° C. over a period of time for one hour. The reaction is quenched with a saturated brine (50 ml), and the mixture is extracted with ethyl acetate (150 ml×2). The organic layer is washed with a saturated brine (100 ml×2), dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue is purified by silica gel column chromatography (eluent: ethyl acetate/hexane) to give 1-(3,5-dichloropyridin-4-yl)-3-methoxymethoxypropane (1.0 g) as an oil.

1. customThe reaction is quenched with a saturated brine (50 ml)
2. extractionthe mixture is extracted with ethyl acetate (150 ml×2)
3. washThe organic layer is washed with a saturated brine (100 ml×2)
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe residue is purified by silica gel column chromatography (eluent: ethyl acetate/hexane)

ORD-Eintrag

ord-95fecb186f3649c6953c9345bb4553df

Quelldatensatz

uspto-grants-2004_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06765095B2