Synthetic Studies on Mannostatin A and Its Derivatives: A New Family of Glycoprotein Processing Inhibitors
作者:Stephen Bruce King、Bruce Ganem
DOI:10.1021/ja00081a017
日期:1994.1
Mannostatin A (1) is a naturally-occurring α-mannosidase inhibitor whose carbocyclic structure represents a significant departure from known alkaloid-based glycosidase inhibitors. The total synthesis of 1 [(1R,2R,3R,4R,5S)-1-(methylthio)-2,3,4-trihydroxy-5-aminocyclopentane], as well as those of several analogs and derivatives, was devised in order to probe structure-activity relationships in this
Mannostatin A (1) 是一种天然存在的 α-甘露糖苷酶抑制剂,其碳环结构与已知的基于生物碱的糖苷酶抑制剂明显不同。1 [(1R,2R,3R,4R,5S)-1-(methylthio)-2,3,4-trihydroxy-5-aminocyclopentane] 以及几种类似物和衍生物的全合成设计于为了探测这个 N-连接糖蛋白生物合成抑制剂家族中的构效关系。合成策略的特点是不对称杂 Diels-Alder 反应和使用 OsO 4 的高度顺式立体选择性烯烃二羟基化。N-苄基甘露糖抑制素和甘露糖抑制素砜均表现出对杰克豆 N-甘露糖苷酶的良好竞争性抑制(K 1 = 380±81 和 126±16 nM,分别),尽管不如 1 有效。有趣的是,对映体纯 3,4-bis-epi-mannostatin 也是一种适度竞争性的 jack bean α-mannosidase 抑制剂(K 1 为 16