The invention provides a method for forming P-glucoside linkages in carbohydrate polymers, particularly synthetic glucan molecules, by attaching a protecting group to the C2 position of a glucoside donor. The protecting group of the invention stabilizes the dioxolenium ion and prevents orthoester formation to promote the β linkage and inhibit the undesirable a linkage. One such protecting group is 4-acetoxy-2,2-dimethylbutanoyl chloride.
                            该发明提供了一种在
碳水化合物聚合物中形成P-
葡萄糖苷键的方法,特别是合成
葡聚糖分子,方法是通过将保护基附加到
葡萄糖供体的C2位置。该发明的保护基稳定了二氧杂环离子,并防止了正交酯形成,以促进β键和抑制不良的α键。其中一种这样的保护基是4-乙酰氧基-
2,2-二甲基丁酰氯。