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D-Galactose pentaacetates

By contrast, the D-glucose isothiocyanate derivative 33 was synthesized from d-galactose pentaacetate 27 (Scheme 7) 51. Reaction of 27 with benzyl alcohol followed... [Pg.51]

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]

C16H22011 b-D-galactose pentaacetate 4163-60-4 25.00 1.3200 2 29814 C16H36Br3N tetra-n-butylammonium tribromide 38932-80-8 25.00 1.3364 2... [Pg.276]

The acyloxonium rearrangement provides a good preparative access to D-talose from D-galactose. Thus, tetra-0-acetyl-/3-D-galactopy-ranosyl chloride (90) is treated with antimony pentachloride to give the mixture of salts 91 and 92, which is hydrolyzed and the mixture of products acetylated. Penta-O-acetyl-a-D-talopyranose, which is present as the pure a-D anomer, crystallizes out from the mixture, whereas the D-galactose pentaacetate does not. The latter exists as a difficultly crystallizable, a,/3 mixture, because hydrolysis of 91 and acetylation of the product leads to an anomeric mixture. [Pg.161]

D-Galactose diethyl thioacetal pentaacetate to l-desoxy-D-galactitol ... [Pg.39]

Corresponding to this formula LIX, isolactal reacts as a ketose, not as an aldose. It is split into D-galactose and D-isoglucal by kefir emulsin.18 The pentaacetate (LX) of isolactal is obtained by the use of pyridine... [Pg.235]

D-Galactose diethyl thioacetal, V, 26 pentaacetate, V, 6, 26 D-Galactose methylphenylhydrazone, III, 26... [Pg.351]

D-Galactose oxime, IV, 122, 124 —, hexaacetyl-, IV, 123, 160 D-Galactose phenylhydrazones, and their pentaacetates, III, 26 D-Galactose phenylosazone, III, 29, 34 D-Galactose phenylosazone anhydride, III, 31, 39... [Pg.352]

D-Galactose phenylosotriazole, III, 38 a-D-Galactose 1-phosphate, V, 71 D-Galactose sulfates, II, 178 aldehydo-D-Galactose, l-chloro-l-thio-ethoxy-, pentaacetate, I, 96 aMelij/do-D-Galactose, l-thioethoxy-3,4,-6,6-tetraacetyI-, ethyl 1,2-orthoacetate, I, 96, 121... [Pg.352]

Synonyms /f-o-Galactopyranose pentaacetate /f-D-Galactose Source Raveendran, R Wallen, S. L. [Pg.598]

See other pages where D-Galactose pentaacetates is mentioned: [Pg.37]    [Pg.163]    [Pg.304]    [Pg.270]    [Pg.253]    [Pg.260]    [Pg.267]    [Pg.26]    [Pg.96]    [Pg.121]    [Pg.875]    [Pg.943]    [Pg.96]    [Pg.37]    [Pg.163]    [Pg.304]    [Pg.270]    [Pg.253]    [Pg.260]    [Pg.267]    [Pg.26]    [Pg.96]    [Pg.121]    [Pg.875]    [Pg.943]    [Pg.96]    [Pg.157]    [Pg.19]    [Pg.312]    [Pg.123]    [Pg.20]    [Pg.6]    [Pg.35]    [Pg.60]    [Pg.271]    [Pg.352]    [Pg.15]    [Pg.124]    [Pg.396]    [Pg.540]    [Pg.62]    [Pg.63]    [Pg.65]    [Pg.71]    [Pg.638]    [Pg.127]   
See also in sourсe #XX -- [ Pg.25 , Pg.270 , Pg.271 ]



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