Hydrochloric Acid → Ethyl 2-{[6-(2-cyanophenyl)pyridin-3-yl]methyl}-3-oxohexanoate

To a mixture of 60% sodium hydride in oil (1.64 g) and tetrahydrofuran (30 mL) was added dropwise a mixture of ethyl 3-oxohexanoate (8.10 g) in tetrahydrofuran (20 mL) at 0° C., and the mixture was stirred at room temperature for 30 min. Then, 2-[5-(chloromethyl)pyridin-2-yl]benzonitrile (2.25 g) and tetrabutylammonium iodide (1.25 g) were added, and the mixture was stirred at room temperature overnight. The reaction mixture was poured into 1 M hydrochloric acid (50 mL), and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography to give the title compound as a yellow oil (2.20 g, 62%).

1. additionwas added dropwise
2. stirringthe mixture was stirred at room temperature overnight
3. extractionthe mixture was extracted with ethyl acetate
4. washThe ethyl acetate layer was washed with saturated brine
5. dry with materialdried over anhydrous magnesium sulfate
6. customThe solvent was evaporated under reduced pressure
7. customthe residue was purified by silica gel column chromatography

ORD-Eintrag

ord-cc098c3d6f2347038e3fadea5fa9f10f

Quelldatensatz

uspto-grants-2012_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08148383B2