描述了在C-2位带有NHAc基团的1,2-顺式-同氨基糖的合成。制备这些α- d -GlcNAc和α- d -GalNAc模拟物的关键步骤是将β-氨基醇骨架重排应用于zezepane前体。该策略还允许访问天然存在的α-HGJ和α-HNJ。将α - d -GlcNAc-构型的亚氨基糖与葡糖苷受体偶联以产生新的假二糖。初步的糖苷酶抑制评估表明,α - d -GalNAc构型的同亚氨基糖是一种有效的选择性α- N-乙酰半乳糖苷酶抑制剂。
Access to Homoglyconojirimycins via Ring Isomerisation of Pentahydroxylated Azepanes
作者:Yves Blériot、Tao Liu、Yongmin Zhang
DOI:10.1055/s-2007-973884
日期:2007.4
N-Benzyl pentahydroxyazepanes undergo ring isomerization during mesylation of the hydroxyl group β to the nitrogen via a neighboring nitrogen participation involving a transient aziridinium species which is trapped by chlorine. The resulting chloromethyl tetrahydroxypiperidines have been converted into the corresponding homoglyconojirimycins.
The synthesis of 1,2-cis-homoiminosugars bearing an NHAc group at the C-2 position is described. The key step to prepare these α-d-GlcNAc and α-d-GalNAc mimics utilizes a β-aminoalcohol skeletal rearrangement applied to an azepane precursor. This strategy also allows access to naturally occurring α-HGJ and α-HNJ. The α-d-GlcNAc-configured iminosugar was coupled to a glucoside acceptor to yield a novel
描述了在C-2位带有NHAc基团的1,2-顺式-同氨基糖的合成。制备这些α- d -GlcNAc和α- d -GalNAc模拟物的关键步骤是将β-氨基醇骨架重排应用于zezepane前体。该策略还允许访问天然存在的α-HGJ和α-HNJ。将α - d -GlcNAc-构型的亚氨基糖与葡糖苷受体偶联以产生新的假二糖。初步的糖苷酶抑制评估表明,α - d -GalNAc构型的同亚氨基糖是一种有效的选择性α- N-乙酰半乳糖苷酶抑制剂。