α-和β-型N-呋喃核糖基酰胺

α-and β-N-Furanoribosyl Amide: Synthesis and Purification

  • 摘要: 为揭示N-糖基酰胺类糖蛋白在生命活动过程中的作用,迫切需要对N-糖基酰胺中α-和β-型2种异构体进行有效分离和纯化. 本文通过2种途径合成了α-和β-型N-呋喃核糖基丙酰胺,报道了核糖胺5的N-酰化途径中β-型N-呋喃核糖基丙酰胺为主要产物,而叠氮糖8的原位还原和随即进行的N-酰化途径中,α-型N-呋喃核糖基丙酰胺为主要产物;揭示了碱性展开剂对分离α-和β-型N-呋喃核糖基丙酰胺具有重要作用,而且随着碱的比例增加,α-和β-型2种异构体的ΔRf也随之增大. 其中,含有机碱Et3N的展开剂体系Cyclohexane/Et3N使二者的ΔRf值达到0.24,从而实现了2种异构体9a/9b的有效分离.

     

    Abstract: In order to disclose the role of N-glycosyl amides-containing proteins in the life process, an efficient separation and purification ofα-/β- isomers were urgently required. This paper reported a synthesis and purification of two pairs of α-/β-furanoribosyl amide, 6a/6b and 9a/9b. The results show the important role of basic developing solvents to separate α- and β-isomers by thin layer chromatography (TLC). And a high ΔRf of 0.24 between α-and β-isomers (9a/9b) are achieved, which lead to their easy peperation by flash column chromatography.

     

/

返回文章
返回
Baidu
map