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C- Hydroxymethyl tetroses

respectively. As both pairs can be efficiently separated on a column of cation-exchange resin (Ba + form), the branched-chain aldoses 35 and 37 can be obtained in 7 and 6% yield, respectively. The co-application of boric acid increases the yield of 35 up to 14% however, the yield of 37 decreases to only 3% [58]. [Pg.35]

V. 3-C-(Hydroxymethyl)tetroses 1. 8-C-(IIydroxymethyl)-T>-glycero-aldotetrose (Apiose)... [Pg.275]

Hydroxymethyl- or Formyl-branched Sugars 3-C-(Hydroxymethyl)-D-g/ycero-tetrose (1)... [Pg.72]

An efficient method for large-scale preparation of apiose was developed by Koos et al. [21], using an Aldol-Cannizzaro reaction as a key step. 2,3-0-isopropylidene-L-t/2rco-tetrodialdose acetal 24 was reacted with excessive formaldehyde and gave 3-C-(hydroxymethyl)-2,3-0-iso-propylidene-D- /ycero-tetrose acetal 25, which was deprotected to afford apios 26. Besides, treatment of 27 with formaldehyde in the presence of sodium hydroxide yielded branched furanoside 28 under the same conditions [22] (O Scheme 9). It is worth noting that the prod-... [Pg.309]

Cross-Cannizzaro reactions occur mainly with aldose species having no a-hydrogen atoms, specifically, 2-C-(hydroxymethyl)glyceraldehyde and (hydroxymethyl )tetroses. [Pg.213]

C-Hydroxymethyl-a-D-cr /Aro-tetrofuranose, A-785 3-C-Hydroxymethyl-p-i>e/3 //iro-tetrofuranose, A-785 3-C-Hydroxymethyl-a-L-c/7/Aro-tetrofiiranose, A-785 3-C-(Hydroxymethyl)-g/Fccro -tetrose, A-785 3-Hydroxy-6-(methylthio)hexyl glucosinolate, H-183 3-Hydroxy-5-(methylthio)pentyl glucosinolate, H-184 3-C-(Hydroxymethyl)threitol, H-156 2-C-(Hydroxymethyl)threose, H-185... [Pg.1061]

In addition to sugars with straight chains, branched chain sugars also exist in nature, for example as components of pectin and other polysaccharides. Again, their preferred names are the trivial names. Aldopentose D-apiose with one chiral carbon atom has the systematic name 3-C-hydroxymethyl-D-g/ycero-tetrose (4-19). [Pg.212]

Deoxy-3-(hydroxymethyl) -d -glyc-ero-tetrose (cordycepose) H H HOHj C—C—C—CHO HO HOH2C metabolic product of Cordyceps mililaris Link47 ... [Pg.256]

Hydroxymethyl) -d-glyeero-tetrose (apiose) HOH2C 1 H HOH2C—C—C—CHO HO HO glycosides of Umbelliferae47 ... [Pg.256]

See other pages where C- Hydroxymethyl tetroses is mentioned: [Pg.263]    [Pg.266]    [Pg.35]    [Pg.35]    [Pg.448]    [Pg.263]    [Pg.266]    [Pg.35]    [Pg.35]    [Pg.448]    [Pg.173]    [Pg.643]    [Pg.631]    [Pg.1148]    [Pg.1133]    [Pg.1185]    [Pg.11]    [Pg.137]    [Pg.1082]    [Pg.1218]    [Pg.1300]    [Pg.1358]    [Pg.1128]    [Pg.176]    [Pg.266]   


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C-Hydroxymethylation

Tetroses

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