osyl]hederagenin, 1), δ-hederin (3-O-(α-L-arabinopyranosyl)hederagenin, 3), and three related triterpenoid saponins is described as part of a study of the structure−activity relationships between triterpenoid saponins and hemolytic activity. 4-Methoxybenzyl α-L-arabinopyranoside (11) was synthesized first and then used to prepare the different arabinose acceptors. Glycosylation between the acceptors
α-hederin (3-O-[α-L-rhamnopyranosyl-(1⇄2)-α-L-arabinopyranosyl]hederagenin, 1), δ-hederin (3-O-(α-L-arabinopyranosyl)的合成hederagenin, 3) 和三种相关的三萜
皂苷被描述为三萜
皂苷与溶血活性之间构效关系研究的一部分。首先合成
4-甲氧基苄基 α-L-阿拉伯
吡喃糖苷 (11),然后用于制备不同的
阿拉伯糖受体。受体和 2,3,4-三-O-
苯甲酰基-α-L-
吡喃
鼠李糖基三
氯乙
酰亚胺酯 (20) 之间的糖基化以极好的收率进行,得到所需的二糖。二糖的三
氯乙
酰亚胺衍
生物与
烯丙基-或
甲基常春藤苷配伍以高产率得到受保护的
皂苷。然后在
脱保护后以良好至中等的产率获得
皂苷及其相应的甲
酯。(© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim