小争吵
发表于 2025-3-30 11:03:25
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
出价
发表于 2025-3-30 16:08:59
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.
勉励
发表于 2025-3-30 17:20:11
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
发表于 2025-3-30 22:11:52
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