In this thesis, the reaction such as tritylation, p-tosylation, chlorization and acetylation were used in the selective protection of the hydroxyls of carbohydrate.

• 本论文通过三苯甲基化反应、对甲基苯磺酰化反应、氯代反应及乙酰化反应研究了糖中羟基的选择性保护，同时还研究了糖番的合成及甲壳素的降解反应。