Diethyl Ether → HCID 66725054, compound

Temperature

-78 °C

Under an argon atmosphere, to a solution of ethyl diethoxyacetate (900 μL, 5.06 mmol) in THF (15 mL) was added slowly a diethyl ether solution of (2-naphtalenylmethyl)magnesium bromide (21) (0.25 M, 25.0 mL, 6.25 mmol) at −78° C. After stirring at for 2.5 h at −78° C., the mixture was gradually warmed to room temperature and stirred for 15 h. To this was added 20% aqueous solution of ammonium chloride (10 mL) and the product was extracted with ethyl acetate (×3). The organic layer was sequentially washed with water (×1) and saturated brine (×1), and dried over anhydrous sodium sulfate. After filtration, the mixture was concentrated under reduced pressure and the residue was purified by silica gel flash column chromatography (n-hexane/ethyl acetate=19/1) to give 1,1-diethoxy-3-(2-naphthalenyl)propan-2-one (22) as a colorless oily substance (675 mg, 2.48 mmol, 49.0%).

1. temperaturethe mixture was gradually warmed to room temperature
2. stirringstirred for 15 h
3. extractionthe product was extracted with ethyl acetate (×3)
4. washThe organic layer was sequentially washed with water (×1) and saturated brine (×1)
5. dry with materialdried over anhydrous sodium sulfate
6. filtrationAfter filtration
7. concentrationthe mixture was concentrated under reduced pressure
8. customthe residue was purified by silica gel flash column chromatography (n-hexane/ethyl acetate=19/1)

ORD record

ord-e1bae01e0f414032b5e95e699f93734c

Source dataset

uspto-grants-2015_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09151739B2