Glycosylation of hederagenin with the trichloroacetimidate derivatives of six commercial disaccharides (D-cellobiose, D-lactose, D-maltose, D-melibiose, D-gentiobiose, D-isomaltose) was performed giving the protected saponins in high yields. Deprotection then gave the saponins which were transformed into the corresponding methyl esters. The hemolytic activity of these synthetic hederagenin diglycosides was measured in order to establish structure–activity relationships based on the type and sequence of the attached sugar for the free carboxylic acid and methyl ester saponins.
使用六种商业化
双糖(
D-细胞二糖、
D-
乳糖、
D-
麦芽糖、
D-梅里糖、
D-
金雀异二糖、
D-
异麦芽糖)的三
氯乙酰胺衍
生物对苦木苷进行糖苷化反应,得到了高产率的保护
皂苷。去保护后得到的
皂苷进一步转化为相应的甲基酯。这些合成的苦木苷
双糖的溶血活性被测量,以根据附加糖的类型和序列建立游离
羧酸和甲基酯
皂苷的结构–活性关系。