Diethyl Ether → 5-(Benzyloxy)pentan-1-ol

A stirred solution of 107.0 grams (1.0 mole) of 1,5-pentanediol, 30 ml (0.25 mole) of phenylmethyl bromide and 33.0 grams of 85% potassium hydroxide in 40 ml of xylenes was heated at 110° C. for 18 hours. After this time the reaction mixture was cooled and shaken with diethyl ether and water. The organic layer was washed in turn with water, aqueous 5% hydrochloric acid, water, and with an aqueous solution saturated with sodium chloride. The organic layer was dried with magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure to a residual oil. The oil was subjected to column chromatography on silica gel. Elution was accomplished using 0.5-50% diethyl ether in hexanes. The appropriate fractions were combined and concentrated under reduced pressure yielding 27.6 grams of 7-phenyl-6-oxaheptan-1-ol. The nmr spectrum was consistent with the proposed structure.

1. temperatureAfter this time the reaction mixture was cooled
2. washThe organic layer was washed in turn with water, aqueous 5% hydrochloric acid, water
3. dry with materialThe organic layer was dried with magnesium sulfate
4. filtrationfiltered
5. concentrationThe filtrate was concentrated under reduced pressure to a residual oil
6. washElution
7. concentrationconcentrated under reduced pressure

ORD-Eintrag

ord-de1f41e7ed32489f99bd398ddfcde193

Quelldatensatz

uspto-grants-1992_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05081287