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Galacturonic acid methyl ester, preparation

Anomeric ediyl hemiacetals of the methyl ester of aldehydo-D-galacturonic acid tetraacetate were prepared by Dimler and Link. In chloroform, these isomers mutarotated to an intermediate value over a period of several hours, and the mutarotation was complex. Solvent-free oldehydo-D-galactose pentaacetate was obtained in crystalline form, and did not show mutarotation in 1,1,2,2-tetrachloro-ethane. " In the presence of water, the corresponding crystalline aldehydrols of aZde/tydo-D-galactose pentaacetate and aldehydo-T>-mannose pentaacetate were obtained. [Pg.25]

See other pages where Galacturonic acid methyl ester, preparation is mentioned: [Pg.85]    [Pg.122]    [Pg.109]    [Pg.41]    [Pg.290]    [Pg.66]    [Pg.290]    [Pg.374]    [Pg.156]    [Pg.286]    [Pg.137]    [Pg.138]    [Pg.138]    [Pg.342]    [Pg.3]    [Pg.249]    [Pg.484]    [Pg.273]    [Pg.324]    [Pg.60]    [Pg.236]   
See also in sourсe #XX -- [ Pg.36 , Pg.74 ]



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