Synthesis and structure of bromo glycosyl imines readily obtained from protected glycosyl azides
作者:Jean-Pierre Praly、Djennane Senni、René Faure、Gérard Descotes
DOI:10.1016/0040-4020(94)01036-y
日期:1995.2
Treatment of various furanosyl and pyranosyl azides in the presence of N-bromosuccinimide in excess led to the corresponding moderately stable glycosyl bromoimines in almost quantitative yields, except for the less reactive peracetylated α-d-glucopyranosyl azide and a benzyl-protected derivative. NMR analysis and crystal structure determination showed that the C=N double bond adopted a (Z) configuration
在过量的N-溴丁二酰亚胺存在下处理各种呋喃糖基和吡喃糖基叠氮化物,以几乎定量的产率产生相应的中等稳定的糖基溴亚胺,除了反应性较低的过乙酰化的α-d-吡喃葡萄糖基叠氮化物和苄基保护的衍生物。NMR分析和晶体结构测定表明,产物中的C = N双键采用(Z)构型,这主要是由于连接到异头碳上的CH键均质化所致。