Studies on the Chemical Constitution of Agar-agar. XIX. Pyruvic Acid as a Constituent of Agar-agar (Part 3). Structure of the Pyruvic Acid-linking Disaccharide Derivative Isolated from the Methanolysis Products of Agar
Studies on the Chemical Constitution of Agar-agar. XIX. Pyruvic Acid as a Constituent of Agar-agar (Part 3). Structure of the Pyruvic Acid-linking Disaccharide Derivative Isolated from the Methanolysis Products of Agar
作者:Susumu Hirase
DOI:10.1246/bcsj.30.75
日期:1957.1
1. The structure of the acidic compound, isolated from the partial metha-nolysis products of agar in the previous work, has been investigated.2. Methylation data have indicated that the structure of the compound is 4-O-4′, 6′-O-1″-carboxyethylidene-β-d-galactopyranosyl-3,6-anhydro-l-galactose dimethyl-acetal, the β-linkage being suggested on the basis of the optical rotatory behavior.3. The structure assigned is also supported by the result of partial hydrolysis and periodate oxidation of the compound.4. No information has been obtained as to the configuration of the carbon atom C1 of the ethylidene group in the molecule.