Polysaccharides denitration

Henry reaction of 1-deoxy-l-nitroaldoses followed by denitration is a valuable strategy to obtain C-glycosyl compounds104 and this procedure was used for the preparation of several C-polysaccharides. [Pg.191]

Alkaline hydrolysis of starch nitrate produced ammonia, cyanides, nitrites, and nitrates.1478 Starch nitrate could be denitrated by use of diluted solutions of ammonium sulfite followed by the addition of hydrogen peroxide to remove colloidal sulfur.1448 The strong nitrate band absorption in the infrared between 730 and 960 cm-1 complicates the identification of polysaccharides. The region suitable for identification of starch nitrates is between 900 and 1350 cm M479 Nitration of glyceryl starch into a trinitrate was also reported.1480 Starch nitrates readily react with an TV.TV-dimethylformamidc-SO complex to give trisulfates.1481... [Pg.239]

Denitration can be effected by chemical reducing agents (134)- For monomolecular nitrates, reductive denitration with hydrogen and Raney nickel (135) is preferable. Ammonium hydrogen sulfide effectively denitrates the nitrated polysaccharides. [Pg.170]

Denitration can be achieved by strong sulfuric acid, but depolymerization of the carbohydrate also occurs. Alkaline hydrolysis gives rise to a mixture of polysaccharide fragmentation products as well as inorganic nitrates and nitrites. Nitrate groups are removed without appreciable degradation... [Pg.693]

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