Dichloromethane → (S)-6-methyl-5-decanone

Temperatur

0 °C

After 0.95 ml (0.95 mmol) of ethylaluminum dichloride (hexane 1M solution) were added to a dried methylene chloride (3 ml) solution of 101.5 mg (0.38 mmol) of (S)-3-butyl-2-methanesulfonyloxy-3-heptanol (unrefined) at -78° C. under stirring, and stirred for two and a half hours at -78° C., the temperature was raised to 0° C. over an hour and a half. The reaction was stopped with three drops of phosphoric acid buffer solution (pH 7). The resultant suspension was diluted with ethyl acetate, dried with anhydrous sodium sulfate, filtered and concentrated. The oily residue was separated and refined by the use of silica gel column chromatography (hexane/ethyl acetate=35/1) to obtain (S)-6-methyl-5-decanone as a pale yellow oily substance (56.3 mg, yield 87%).

1. stirringstirred for two and a half hours at -78° C.
2. dry with materialdried with anhydrous sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated
5. customThe oily residue was separated

ORD-Eintrag

ord-5753457797da46cc8cf472f5691cd339

Quelldatensatz

uspto-grants-1986_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04604486