3-Methyl-2-butanone → 1-Methoxy-5-methylhexane-2,4-dione

To a stirred slurry of NaH (1.02 g, 26 mmol, washed with anhydrous hexanes) in ether (10 mL) was added methyl methoxyacetate (2.3 mL, 23 mmol) followed by 3-methyl-2-butanone (2.4 mL, 23 mmol) in ether (5 mL). The resulting mixture was stirred for 15 h and became a clear yellow solution. The reaction was quenched with saturated aqueous NH4Cl. The resulting mixture was extracted with EtOAc (2×20 mL). The combined organic layer was washed with H2O, brine, dried with Na2SO4 and concentrated under reduced pressure to provide 1-methoxy-5-methylhexane-2,4-dione (2.90 g, 80%) as a mixture of keto and enol form.

1. customThe reaction was quenched with saturated aqueous NH4Cl
2. extractionThe resulting mixture was extracted with EtOAc (2×20 mL)
3. washThe combined organic layer was washed with H2O, brine
4. dry with materialdried with Na2SO4
5. concentrationconcentrated under reduced pressure

ORD-Eintrag

ord-ea82e82546a1470b83d2ef3cc773b77c

Quelldatensatz

uspto-grants-2012_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08299267B2