Abstract
A direct chemical proof is provided for the occurrence of the sucrose linkage in raffinose and stachyose by isolation of sucrose, after selective removal of D-galactose units. The procedure used takes advantage of the fact that the D-galactopyranosyl residues contain a cis-α-glycol group which, in contrast to the trans glycol group of the other sugar residues, is rapidly attacked by ethanolic periodate. The resulting dialdehyde is alkali-labile and preferentially hydrolyzed with dilute base, the alkali-stable sucrose unit being released intact.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
11 articles.
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