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Glycaric acids

Complexes with Hydroxy Acids Alduronic and Glycaric Acids 100... [Pg.69]

Problem 22.60 Which D-pentose is oxidized to an optically inactive dibasic acid and undergoes a Ruff degradation to a tetrose whose glycaric acid is meso-tartaric acid ... [Pg.516]

The fourth student in this group, Stanford Moore, began his doctoral thesis research with Link in 1935. His work involved the development of a new, and still useful, procedure for oxidizing aldoses to the aldonic acids by potassium hypoiodite in methanol solution the resulting aldonic acids were then converted into nicely crystalline benzimidazole derivatives that proved more suitable for the characterization of carbohydrates than the classical osazones. This method, developed by Moore and Link (1940), was extended to the characterization of hexuronic acids, as their bis(benzimidazole)s, after oxidation to the glycaric acid (R. Lohmar, Dimler, Moore, and Link, 1942), of lactic acid (Moore, Dimler, and Link, 1941 Dimler and Link, 1942), and of ribose, fucose, and digitoxose (Dimler and Link, 1943). During these... [Pg.5]

To aldaric acids (glycaric acids) by nitric acid CHO COOH... [Pg.1130]

Oxidations with dilute nitric acid d 1.15) are commonly used to transform sugars into dicarboxylic (glycaric) acids. Evaporation of a solution of... [Pg.127]

The application of more-severe reaction-conditions, such as a reaction temperature of 50° with a platinum-on-carbon catalyst, results in attack on the primary hydroxyl group at C-6 thus, a 54% yield of D-glucaric acid is obtained from D-glucose. Aldoses are selectively attacked at the carbonyl group at room temperature, whereas, at higher temperatures, the hydroxyl group on C-6 is also oxidized, with the production of a glycaric acid. [Pg.182]

Oxidation of aldoses yields aldonic acids (onic acids), uronic acids, and glycaric acids (sugar dicarboxylic acids, aldaric acids) (Fig. 36). Aldonic acids easily cyclize to the corresponding y-lactones. Glycaric acids may form dilactones. [Pg.122]

Because two products form, we still need information from other reactions to establish the structure of each. For example, ribose gives two structures whose configuration at all centers except C-2 is known. One product is oxidized to give an optically inactive glycaric acid. It must be aUose. The other product must therefore then be altrose. If altrose is oxidized, the product is an optically active aldaric acid. [Pg.936]


See other pages where Glycaric acids is mentioned: [Pg.501]    [Pg.173]    [Pg.1118]    [Pg.1118]    [Pg.1149]    [Pg.134]    [Pg.423]    [Pg.1114]    [Pg.1114]    [Pg.1147]    [Pg.123]    [Pg.1425]    [Pg.1475]    [Pg.4]    [Pg.224]   
See also in sourсe #XX -- [ Pg.1118 ]

See also in sourсe #XX -- [ Pg.264 ]




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