P-D-glucose

P-D-glucose [28905-12-6] (2). Symp products are produced that contain from 95 to over 99% dextrose. 

Glucose oxidase is specific for P-D-glucose and where a-D-glucose is the available substrate, prior conversion from the a to the P form is required. 

The anion of nitromethane adds easily to the carbonyl functions of sugars. This is a useful strategy for extension of the carbon chain.100 2-Acetamido-2-deoxy-P-D-glucose (A-acetyl-D-glucosamine) is the carbohydrate unit of glycoproteins that occurs most often. The nitromethy-lation method provides a straightforward route to a series of C-glycosyl compounds with the acetamido functionality (Eq. 3.62).101... 

Figure 2.25 Dependence of the catalytic current for the oxidation of p-D-glucose mediated by the redox polyelectrolyte film for different number of COx layers self-assembled with (PAH-Os) (COx) (n=m = 2, 4, 6). Taken from [182].

Figure 2.26 (a) Scheme for an electrostatically self-assembled multilayer (PAHOs)4(Apo-COx)3(COx) electrode, (b) Catalytic current response to p-d-glucose concentration for self-assembled nanostructured thin films of PAH-Os/COx/(PAH-Os/(ApoGOx)3 and (PAH-Os/ApoCOx)3/PAH-Os/COx, where ApoCOx is FAD-free glucose oxidase. Taken from Ref [219]. 

Figure 2.27 Double catalytic cycle that gives rise to the current in the presence of p-D-glucose. COx(FAD) oxidizes the enzyme substrate p-D-glucose to yield the reduced form of the enzyme GOx(FADH2) that is then reoxidized by the osmium polymer mediator PAH-Os(ll I). This process yields PAH-Os(ll). Electrons should diffuse to the electrode surface by electron...

Esterification of 2,4-D with plant constituents via conjugation formed the p-D-glucose ester of 2,4-D (Thomas et ah, 1964). 

Die in einer Nebenreaktion gebildete Pentaacetyl-P-D-glucose wurde nicht beriicksichtigt. 

---