Acetic Acid → 2,3,5-tri-O-benzyl-L-xylitol

Temperatur

0 °C

Methyl 2,3,5-tri-O-benzyl-L-xylofuranose (11.7 g, 27.92 mmol) is dissolved in ethanol (150 mL) and sodium borohydride (0.844 g, 30.5 mmol) was added. The mixture is stirred 2 hours at 0° C. The reaction is treated successively by acetone and acetic acid. The mixture is concentrated under reduced pressure. The residue is taken with water, extracted three times with ethyl acetate. The organic layer is dried over sodium sulfate, filtered and concentrated under reduced pressure to afford an oil. Flash chromatography on silica gel and elution with a 1:1 mixture of hexane and ethyl acetate yield 2,3,5-tri-O-benzyl-L-xylitol (10.2 g, 86.5%) as an oil.

1. concentrationThe mixture is concentrated under reduced pressure
2. extractionextracted three times with ethyl acetate
3. dry with materialThe organic layer is dried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure
6. customto afford an oil
7. washFlash chromatography on silica gel and elution
8. additionwith a 1:1 mixture of hexane and ethyl acetate

ORD-Eintrag

ord-183dc11ec86f436a92ee64539cc2168f

Quelldatensatz

uspto-grants-1992_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05097023