Hydrolysis and Other Features

5 Hydrolysis and Other Features.-Allyl glycosides can be converted to the free sugars by 

It was concluded that acetolyses of the pyranosides that give rise to both cyclic and acyclic products involve reaction from the /3-rather than the a-anomer. Attempts to glycosylate glycosides of polyethyleneglycol monomethyl ether did not lead to disaccharide products but rather to products of glycosyl exchange on the ether.  

Studies of the alkaline hydrolysis of p-nitrophenyl rhamnoside and arabinoside have been reported, and the base-catalysed epimerizations at C-2 in several glucose- and mannose-containing disaccharides have been reported.  

2-Deoxyglycosidic bonds are selectively cleaved under mild conditions (100°C) during 

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Hydrolysis and Other Features of Glycosides andDisaccharides.-Deslongchamps has presented a comprehensive review on the stereoelectronic effects applying during the hydrolysis of glycosides. ... 

Hydrolysis and Other Reactions and Features.- The pseudo first order rate constant for the hydrolysis of o-nltrophenyl 6-D-gluco-pyranoslde at pH 11.4 Increases 10 fold on addition of phenyl-boronlc acid In the presence of benzyl hexadecyl dlmethylammonlum chloride, whereas the enhancement factor for the corresponding... 

Hydrolysis and Other Reactions and Features.- A linear relationship exists between bond lengths and ease of hydrolysis for a wide range of unsymmetrical acetals, including aryl a-D-glucosldes (the C-1—0-1 bond in these cases... 

Hydrolysis and other Reactions and Features.—A. novel method for following the add catafysed hydrolysis of sucrose and lactose involves measurement of the rate of reaction of periodate with quenched aliquot portions of the solutions using a periodate>sensitive electrode. In this way sucrose could be determined in the presence of other carbohydrates in the range 0.01-0.1 M, and the method was applied to food products. The glycosidic hydrolysis of fluorenone ketal (107), which serves as a nucleoside glycosylase enzyme model, has been shown to be intramolecularly catalysed by comparison with analogous compounds. ... 

Hydrolysis and Other Reactions and Features.- The rate limiting step in the acid-catalysed hydrolysis of alkyl a- and g-D-fructo-furanosldes has been shown to be the unimolecular heterolysis of... 

Hydrolysis and Other Reactions and Features.- The effects of substituents in the aromatic rings of 3-D-glucopyranosldes on their rates and mechanisms of hydrolysis in concentrated potassium hydroxide (12.75 M) have been studied,as have the reactions of some dlsaccharldes with alkaline hydrogen peroxide. Five different... 

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