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Diversely Substituted Acetyl Groups

CICH CO JL COCH Cl Obtained (by-product) by Friedel-Crafts jT acylation of p-cresol methyl ether with [Pg.1590]

The amino group is substituted by an acetyl or glycoloyl group, and the hydroxyl groups at C-4, -7, -8, and -9 may be methylated or esterified by acetyl, lactyl, sulfate, or phosphate groups [2]. See Fig. 9.1 for the position specificity for neuraminic acid substitution. Sometimes several of the substituents are present on the same molecule. Unsubstituted D-neuraminic acid has not been found in nature. Twenty different sialic acids have been observed, showing a wide degree of structural diversity [2]. [Pg.264]

See other pages where Diversely Substituted Acetyl Groups is mentioned: [Pg.1590]    [Pg.1723]    [Pg.1590]    [Pg.1723]    [Pg.448]    [Pg.127]    [Pg.111]    [Pg.143]    [Pg.128]    [Pg.261]    [Pg.391]    [Pg.391]    [Pg.1583]    [Pg.296]    [Pg.185]    [Pg.408]    [Pg.4]    [Pg.361]    [Pg.68]    [Pg.76]    [Pg.121]    [Pg.7]    [Pg.128]    [Pg.100]   


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Acetyl group

Acetyl substitution

Acetyl-substituted

Substitutional diversity

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