Reactions, Complexation and Other Features of O-Glycosides

6 Reactions, Complexation and Other Features of O-Glycosides - A short review has appeared on recent work directed towards the clarification of the 

Hydrolysis studies on sucrose, leucrose and isomaltulose with Y-zeolites indicate that the pores of the catalyst can include a disaccharide and one or more water molecules. The processes are accelerated by dealumination of the catalysts.  

A study has been made of hydrogen abstraction by chemically produced radicals of the a-D-mannoside type 70. H-1 abstraction leads to p-mannosides, whereas H-2 abstraction competes and leads to 2-ulosides, and 0-protecting groups determine the relative significance of the two processes. An analogous photochemical reaction permits a- to P-mannoside conversions, a-o-Manp-(1 - 6)-d-G1c being converted to the P-D-Man-(1 - 6)-d-G1c.  

Methyl P-D-galactopyranoside, treated with deuterated water in the presence of Raney nickel as catalyst and ultrasonic radiation, gives rapid C-deuteration at 

The self-diffusion coefficients for methyl a- and P-D-glucopyranosides in aqueous solutions have been measured in the concentration ranges 10-70% over the temperature range 250-424 K. At concentrations greater than 40% the mobility of the water and glucoside molecules is significantly lower in the solutions of the a-anomer.  

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