Cyclohexanol → (2,2-Dimethoxyethoxy)cyclohexane

Temperatur

5 °C

Cyclohexanol (11.00 g) was added slowly over 2 hours to a stirred suspension of sodium hydride (4.80 g, 50% w/w dispersion in oil) in dry DMPU (100 ml) at 50° C. under argon. The mixture was stirred for an additional 30 minutes, then cooled to 5° C. and treated with 2-bromo-1,1-dimethoxyethane (16.9 g). Stirring was continued for 18 hours at ambient temperature. The mixture was then poured into ice-water (250 ml). The aqueous mixture was extracted with ether (4×100 ml). The combined extracts were washed successively with water (3×100 ml) and saturated brine (100 ml), then dried (MgSO4) and evaporated. Flash chromatography of the residue, eluting successively with hexane, 5% v/v ethyl acetate hexane and 10% v/v ethyl acetate/hexane, gave 2-cyclohexyloxy-1,1-dimethoxyethane as an oil (A) (7.32 g). This was used without further purification.

1. stirringStirring
2. waitwas continued for 18 hours at ambient temperature
3. extractionThe aqueous mixture was extracted with ether (4×100 ml)
4. washThe combined extracts were washed successively with water (3×100 ml) and saturated brine (100 ml)
5. dry with materialdried (MgSO4)
6. customevaporated
7. washFlash chromatography of the residue, eluting successively with hexane, 5% v/v ethyl acetate hexane and 10% v/v ethyl acetate/hexane

ORD-Eintrag

ord-85112772d44a46948be446da16077491

Quelldatensatz

uspto-grants-1988_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04775684