Sugar Fan Intermediates

In this thesis, the reaction such as tritylation, p-tosylation, chlorization and acetylation were used in the selective protection of the hydroxyls of carbohydrate. The degradation of chitin and synthesis of glycophane were also studied.Different methods were used in the experiments of the selective protection of hydroxyl groups of maltose. The technical condition of preparing 6,6'-di-O-p-tosyl-l,2,2',3,3',4'-hexa-acetyl-maltose was improved as well. And an effective method of deprotection of tritylation, which could completely deprotect the trityl, was also discussed.Optimum condition of preparing 6,6'-di-O-p-tosyl-2,2',3,3',4,4'-hexa-O-acetyl-trehalose was determined. In the cyclization of 6,6'-di-O-p-tosyl-2,2',3,3',4,4'-hexa-O-acetyl-trehalose with catechnola new compound was separated. The compound could be ether, which formed from the polymerization.