Carbon galactose-modified

FIGURE 4-15 Cyclic voltanmiograms for 1.5 x 10 3 M ribose (a), glucose (b), galactose (c), and fructose (d) recorded at a Ru02-modified carbon-paste electrode. Dotted lines were obtained in carbohydrate-free solutions. (Reproduced with permission from reference 50.)... 

Dicks, J. M. Aston, W. J. Davis, G. Turner, A. P. F. Mediated amperometric biosensors for d-galactose, glycolate and 1-amino acids based on a ferrocene-modified carbon paste electrode. Anal. Chim. Acta 1986, 182, 103—112. 

The same type of reactions can be conducted with methyl 2,3,6-tri-O-benzoyl-4-0-trifyl a-D-glucopyranoside to give modified D-galactoses. The free 4-hy-droxyl-carbon can be oxidized with pyridinium chromate to produce the 4-keto derivative, which, in turn, can be fluorinated with DAST to provide the 4-g m-di-fluoride (reaction 4.113). 

---