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ChemicalBook CAS DataBase List 1,2,3,4-TETRA-O-ACETYL-BETA-D-XYLOPYRANOSE
4049-33-6

1,2,3,4-TETRA-O-ACETYL-BETA-D-XYLOPYRANOSE synthesis

5synthesis methods
-

Yield:4049-33-6 94%

Reaction Conditions:

with 1H-imidazole in dichloromethane; for 12.5 h;Cooling with ice;

Steps:

1

A solution of 0.75 g of xylose (5 nmol), 2.84 mE (30mmol) of acetic anhydride, and 2.04 g (30 mmol) of imidazole in 700 mE of dichioromethane was placed in an ice bath for 30 mm and then stirred for 12 hours. The reactionwas then quenched by the addition of methanol and stirredin ice for 30 mm. The mixture was diluted with dichloromethane, adjusted to a neutral pH using HCl, andextracted with Et20. The usual work-up and column chromatography afforded acetylated xylose (1.50 g, 94%) as awhite solid.

References:

US10385087,2019,B1 Location in patent:Page/Page column 7; 15

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