Titlebook: Carbohydrates; Synthesis, Mechanism Momcilo Miljkovic Book 2009 Springer-Verlag New York 2009 Carbohydrate.Chemistry.Glycoscience.Miljkovic

小爭(zhēng)吵

Relative Reactivity of Hydroxyl Groups in Monosaccharides,(.) hydroxyl group and (2) three types of alcoholic hydroxyl groups: (a) the ., which is always . with regard to the carbohydrate ring and is found in both hexopyranoses and pento- or hexofuranoses, (b) the . groups found in both hexopyranoses and pento- or hexofuranoses, and (c) the . secondary hyd

出價(jià)

Cyclic Acetals and Ketals,r ketals (1,3-dioxolanes . or 1,3-dioxanes ., respectively) (Fig. 6.1 ). This reaction is routinely used in carbohydrate chemistry for the protection of hydroxyl groups in a sugar in order to prevent their interference in chemical transformation(s) of other hydroxyl group(s) of that sugar.

勉勵(lì)

Nucleophilic Displacement and the Neighboring Group Participation,nal bipyramidal pentacovalent carbon transition state . and results in the inversion of configuration at the reacting carbon atom (the configuration of . vs. .) (Fig. 7.1); it usually follows the second-order kinetics.

DEAWL

Anhydrosugars,, or six-membered heterocyclic ring are called anhydrosugars. The anhydrosugars are subdivided into two groups: (1) the anhydrosugars that involve the anomeric hydroxyl group in their formation resembling thus the intramolecular glycosides; they are called . and (2) the anhydrosugars that do not inv