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Monosaccharide reaction with acetic anhydride

Bhaskar and Loganathan96 described O-peracetylation of monosaccharides, disaccharides, and methyl glycosides (94) with acetic anhydride under catalysis by acid zeolites. From the panel of zeolites tested (HY, HEMT, HZSM-5, HZSM-12, HZSM-22, and H-beta), the large-pore zeolite H-beta provided the best yields of the fully acetylated sugars, most of them being over 85% and up to 99%, with the pyranose forms 95 accounting for 66-100% of the reaction products (Scheme 22). [Pg.56]

Monosaccharides contain a number of alcoholic hydroxyl groups, and thus can react with acid anhydrides to yield corresponding esters. For example, when glucose is treated with acetic anhydride and pyridine, it forms a pentaacetate. The ester functions in glucopyranose pentaacetate undergo the typical ester reactions. [Pg.310]

The alcohol groups of a monosaccharide can be converted to esters by the methods described in Section 19.4. Thus, the reaction of o-D-gl ucopyranose with acetic anhydride produces a pentaacetate. Note that the hemiacetal hydroxy group is also esterified in this reaction. [Pg.1099]

Esterification of monosaccharides is achieved by reaction of the sugar with an acyl halide or an acid anhydride. Acetylation, for instance with acetic anhydride, is carried out in pyridine solution ... [Pg.290]

Acetic anhydride, electrostatic potential map of, 791 reaction with alcohols, 807 reaction with amines, 807 reaction with monosaccharides, 988... [Pg.1281]

Monosaccharides contain hydroxyl groups. It is not surprising, then, that they undergo reactions typical of alcohols. For example, they can be converted to esters by reaction with acid halides or anhydrides. The conversion of)3-D-glucose to its pentaacetate by reaction with excess acetic anhydride is typical all five hydroxyl groups, including the hydroxyl at the anomeric C-1, are esterified. (To clarify the structure, the ring H s are omitted.)... [Pg.471]


See other pages where Monosaccharide reaction with acetic anhydride is mentioned: [Pg.282]    [Pg.331]    [Pg.282]    [Pg.239]    [Pg.635]    [Pg.1446]    [Pg.161]    [Pg.960]    [Pg.19]    [Pg.38]    [Pg.60]    [Pg.383]    [Pg.37]    [Pg.993]    [Pg.95]    [Pg.129]    [Pg.1015]    [Pg.37]    [Pg.341]    [Pg.377]    [Pg.73]    [Pg.73]   
See also in sourсe #XX -- [ Pg.988 ]

See also in sourсe #XX -- [ Pg.988 ]

See also in sourсe #XX -- [ Pg.876 ]

See also in sourсe #XX -- [ Pg.1015 ]




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Acetals monosaccharides

Acetals reactions with

Acetates monosaccharides

Acetates reactions with

Acetic anhydride reactions

Acetic anhydride with acetals

Anhydrides reactions

Monosaccharides reactions

Reaction with acetic anhydride

Reaction with anhydrides

With acetic anhydride

With anhydrides

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