Water → 2-Cyclohexyloxirane

Temperatur

55 °C

Sodium hydride (4.5 g, 187.5 mmol) and trimethylsulfoxonium iodide (41.25 g, 187.5 mmol) were combined in a 3-neck flask equipped with a mechanical stirrer and an addition funnel. Dimethyl sulfoxide (DMSO) was added slowly, over a 30 min period, until 200 mL had been added. Gas was evolved throughout the addition. A solution of cyclohexane carboxaldehyde (21.8 mL, 180 mmol) in 50 mL of DMSO was added dropwise to the reaction mixture over a 15 min period. The reaction mixture was heated to 55° C. and stirred at 55° C. for 30 min. The reaction mixture was cooled to ambient temperature and poured into 500 mL of water. The aqueous solution was extracted with 3×100 mL of diethyl ether. The combined ether extracts were washed with water and brine, dried over anhydrous magnesium sulfate and concentrated in vacuo. The crude product was distilled (44° C., 0.1 mm) to give 14 g (62% yield) of 1-cyclohexyl ethylene oxide as a clear colorless liquid.

1. customequipped with a mechanical stirrer and an addition funnel
2. additionhad been added
3. additionGas was evolved throughout the addition
4. temperatureThe reaction mixture was cooled to ambient temperature
5. extractionThe aqueous solution was extracted with 3×100 mL of diethyl ether
6. washThe combined ether extracts were washed with water and brine
7. dry with materialdried over anhydrous magnesium sulfate
8. concentrationconcentrated in vacuo
9. distillationThe crude product was distilled (44° C., 0.1 mm)

ORD-Eintrag

ord-029ba4dfdad9428cbdc1270b2833f612

Quelldatensatz

uspto-grants-1997_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05621133